Develop Reference

Android Studio calculate total price

I wanna ask how can I sum all patty price and display in the total ? The total is in activity_main.xml layout while all the product price is in view_product.xml .
Screenshot of app
As you can see the grey color text is per patty price , and the right side black text is price after multiply the quantity of patty. I want all the black text to sum up and show at below total.
MainActivity.java
package com.tankarjian.it212n.a2910assingment;
import android.app.Activity;
import android.os.Bundle;
import android.widget.BaseAdapter;
import android.widget.ListView;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
public class MainActivity extends Activity {
private Products products;
private BaseAdapter productsAdapter;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
products = createInitialProductList();
productsAdapter = new ProductsAdapter(products, productClickListener, getLayoutInflater());
ListView productsListView = (ListView) findViewById(R.id.products_list);
productsListView.setAdapter(productsAdapter);
}
private Products createInitialProductList() {
return new Products(new ArrayList<>(Arrays.asList(
new Product("Chicken Patty", 0, 4.00),
new Product("Chicken Special Patty", 0, 5.00),
new Product("Imported Lamb Patty", 0, 8.00),
new Product("Imported Lamb Special Patty", 0, 10.00)
)));
}
private final ProductClickListener productClickListener = new ProductClickListener() {
#Override
public void onMinusClick(Product product) {
products.removeOneFrom(product);
productsAdapter.notifyDataSetChanged();
}
#Override
public void onPlusClick(Product product) {
products.addOneTo(product);
productsAdapter.notifyDataSetChanged();
}
};
private static class Products implements ProductDataSet {
private final List<Product> productList;
Products(List<Product> productList) {
this.productList = productList;
}
#Override
public int size() {
return productList.size();
}
#Override
public Product get(int position) {
return productList.get(position);
}
#Override
public long getId(int position) {
return position;
}
public void removeOneFrom(Product product) {
int i = productList.indexOf(product);
if (i == -1) {
throw new IndexOutOfBoundsException();
}
Product updatedProduct = new Product(product.name, (product.quantity - 1), product.getPrice());
productList.remove(product);
productList.add(i, updatedProduct);
}
public void addOneTo(Product product) {
int i = productList.indexOf(product);
if (i == -1) {
throw new IndexOutOfBoundsException();
}
Product updatedProduct = new Product(product.name, (product.quantity + 1), product.getPrice());
productList.remove(product);
productList.add(i, updatedProduct);
}
}
}
ProductsAdapter.java
package com.tankarjian.it212n.a2910assingment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import java.util.Locale;
class ProductsAdapter extends BaseAdapter {
private final ProductDataSet productDataSet;
private final ProductClickListener productClickListener;
private final LayoutInflater layoutInflater;
ProductsAdapter(ProductDataSet productDataSet, ProductClickListener productClickListener, LayoutInflater layoutInflater) {
this.productDataSet = productDataSet;
this.productClickListener = productClickListener;
this.layoutInflater = layoutInflater;
}
#Override
public int getCount() {
return productDataSet.size();
}
#Override
public Product getItem(int position) {
return productDataSet.get(position);
}
#Override
public long getItemId(int position) {
return productDataSet.getId(position);
}
#Override
public boolean hasStableIds() {
return true;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = convertView;
if (view == null) {
view = createView(parent);
view.setTag(ViewHolder.from(view));
}
Product Products =(Product) getItem(position);
ImageView image = (ImageView) view.findViewById(R.id.imageBurgerView);
image.setImageResource(R.drawable.burger);
TextView text = (TextView) view.findViewById(R.id.singlePrice);
String price = String.format(Locale.ENGLISH, "%.2f", Products.getPrice());
text.setText(price);
TextView text1 = (TextView) view.findViewById(R.id.totalPrice);
String totalPrice = String.format(Locale.ENGLISH, "%.2f", (Products.getPrice() * Products.quantity));
text1.setText(totalPrice);
Product product = productDataSet.get(position);
ViewHolder viewHolder = (ViewHolder) view.getTag();
update(viewHolder, product);
return view;
}
private View createView(ViewGroup parent) {
return layoutInflater.inflate(R.layout.view_product, parent, false);
}
private void update(ViewHolder viewHolder, final Product product) {
viewHolder.name.setText(product.name);
viewHolder.quantity.setText(String.valueOf(product.quantity));
viewHolder.minus.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
productClickListener.onMinusClick(product);
}
});
viewHolder.plus.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
productClickListener.onPlusClick(product);
}
});
}
private static final class ViewHolder {
final TextView name;
final TextView quantity;
final View minus;
final View plus;
static ViewHolder from(View view) {
return new ViewHolder(
((TextView) view.findViewById(R.id.product_name)),
((TextView) view.findViewById(R.id.product_quantity)),
view.findViewById(R.id.product_minus),
view.findViewById(R.id.product_plus)
);
}
private ViewHolder(TextView name, TextView quantity, View minus, View plus) {
this.name = name;
this.quantity = quantity;
this.minus = minus;
this.plus = plus;
}
}
}
Product.java
package com.tankarjian.it212n.a2910assingment;
class Product {
final String name;
final int quantity;
private double price;
Product(String name, int quantity, Double price) {
this.name = name;
this.quantity = quantity;
this.price = price;
}
public double getPrice() {return price;}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginStart="15dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="15dp"
android:layout_marginBottom="16dp"
tools:context=".MainActivity">
<ListView
android:id="#+id/products_list"
android:layout_width="0dp"
android:layout_height="512dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0" />
<Switch
android:id="#+id/switchMember"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:minHeight="48dp"
android:text="Member"
app:layout_constraintEnd_toEndOf="#+id/products_list"
app:layout_constraintTop_toBottomOf="#+id/products_list" />
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="25dp"
android:layout_marginStart="16dp"
android:text="Tax "
android:textColor="#2A2F49"
android:textSize="19sp"
android:textStyle="bold|italic"
app:layout_constraintBottom_toTopOf="#+id/textView3"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/products_list"
app:layout_constraintVertical_bias="0.92" />
<TextView
android:id="#+id/textView3"
android:layout_width="wrap_content"
android:layout_height="25dp"
android:layout_marginBottom="68dp"
android:text="Total "
android:textColor="#2A2F49"
android:textSize="19sp"
android:textStyle="bold|italic"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<TextView
android:id="#+id/totalTax"
android:layout_width="45dp"
android:layout_height="wrap_content"
android:text="0"
android:textColor="#2A2F49"
android:textSize="19sp"
android:textStyle="bold|italic"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toEndOf="#+id/textView2"
app:layout_constraintTop_toTopOf="#+id/textView7" />
<TextView
android:id="#+id/textView9"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="5dp"
android:text="RM"
android:textColor="#2A2F49"
android:textSize="19sp"
android:textStyle="bold|italic"
app:layout_constraintEnd_toStartOf="#+id/totalTax"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toEndOf="#+id/textView7"
app:layout_constraintTop_toTopOf="#+id/textView7" />
<TextView
android:id="#+id/textView10"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="5dp"
android:text="RM"
android:textColor="#2A2F49"
android:textSize="19sp"
android:textStyle="bold|italic"
app:layout_constraintEnd_toStartOf="#+id/finalTotalPrice"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toEndOf="#+id/textView8"
app:layout_constraintTop_toTopOf="#+id/textView8" />
<TextView
android:id="#+id/finalTotalPrice"
android:layout_width="45dp"
android:layout_height="wrap_content"
android:text="0"
android:textColor="#2A2F49"
android:textSize="19sp"
android:textStyle="bold|italic"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toEndOf="#+id/textView3"
app:layout_constraintTop_toTopOf="#+id/textView8" />
<TextView
android:id="#+id/textView7"
android:layout_width="210dp"
android:layout_height="25dp"
android:layout_marginStart="20dp"
android:text="--------------------------------"
android:textColor="#2A2F49"
android:textSize="19sp"
android:textStyle="bold|italic"
app:layout_constraintEnd_toStartOf="#+id/totalTax"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toEndOf="#+id/textView2"
app:layout_constraintTop_toTopOf="#+id/textView2" />
<TextView
android:id="#+id/textView8"
android:layout_width="210dp"
android:layout_height="26dp"
android:layout_marginStart="20dp"
android:text="--------------------------------"
android:textColor="#2A2F49"
android:textSize="19sp"
android:textStyle="bold|italic"
app:layout_constraintEnd_toStartOf="#+id/finalTotalPrice"
app:layout_constraintHorizontal_bias="0.08"
app:layout_constraintStart_toEndOf="#+id/textView3"
app:layout_constraintTop_toTopOf="#+id/textView3" />
</androidx.constraintlayout.widget.ConstraintLayout>
view_product.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/product_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#FF5722"
android:textSize="20sp"
android:textStyle="bold|italic" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageView
android:id="#+id/imageBurgerView"
android:layout_width="70dp"
android:layout_height="60dp"
android:layout_marginStart="10dp"
android:contentDescription="#string/todo"
app:srcCompat="#drawable/burger" />
<TextView
android:id="#+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_weight="1"
android:text="#string/rm"
android:textAlignment="textEnd"
android:textColor="#878BA3"
android:textSize="16sp"
android:textStyle="bold" />
<TextView
android:id="#+id/singlePrice"
android:layout_width="108dp"
android:layout_height="wrap_content"
android:layout_marginStart="3dp"
android:layout_weight="1"
android:text="#string/textview"
android:textColor="#878BA3"
android:textSize="16sp"
android:textStyle="bold" />
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="#string/rm"
android:textAlignment="textEnd"
android:textColor="#272E53"
android:textSize="16sp"
android:textStyle="bold|italic" />
<TextView
android:id="#+id/totalPrice"
android:layout_width="45dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="#string/textview"
android:textAlignment="textStart"
android:textColor="#272E53"
android:textSize="16sp"
android:textStyle="bold|italic" />
</LinearLayout>
<LinearLayout
android:layout_width="116dp"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Button
android:id="#+id/product_minus"
android:layout_width="30dp"
android:layout_height="40dp"
android:text="-"
tools:ignore="TouchTargetSizeCheck" />
<TextView
android:id="#+id/product_quantity"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_weight="20"
android:textAlignment="center"
android:textSize="16sp"
android:textStyle="bold" />
<Button
android:id="#+id/product_plus"
android:layout_width="30dp"
android:layout_height="40dp"
android:text="+"
tools:ignore="TouchTargetSizeCheck" />
</LinearLayout>
</LinearLayout>

In view_product.xml you are only displaying the price, but that's not where the actual data is located so your question shouldn't be that the prices are in view_product.xml and you want to show in activity_main.xml, but your question should be -
Where is the data located
How to make the necessary calculations
Where to show it. .
Your data regarding the prices are in products object. So, in order to calculate the total you just need to add one more method which calculates the total
private double calculateTotal(ProductDataSet productDataSet) {
double totalPrice = 0.0;
for(int i=0; i<productDataSet.size(); i++) {
totalPrice += productDataSet.get(i).getPrice();
}
return totalPrice;
}
The result of this you can store in a new value or show directly in the textView itself.
((TextView)findViewById(R.id.finalTotalPrice)).setText(calculateTotal(products).toString());
This you can call anywhere after createInitialProductList(). I hope this helps and makes it clear for you.

Invoking findViewById on a null object. Which isn't null

So I have a settings fragment which contains, well, settings.
On line 22 I have a findview which finds a textview. It worked wonders until today (Didn't change a thing). Now I imagine it will also fail the rest of the finds but since it crashes on this one, we will never know.
Why is that?
XML file:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/textView3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#a8a4a1"
android:paddingTop="5dp"
android:paddingBottom="5dp"
android:text="ACCOUNT"
android:textColor="#2b2a29"
android:textSize="15dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/SettingsFragmentAccountSettings"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="4dp"
android:paddingTop="5dp"
android:paddingBottom="5dp"
android:text="Account Settings"
android:textColor="#2b2a29"
android:textSize="20dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/textView3" />
<TextView
android:id="#+id/textView4"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="12dp"
android:background="#a8a4a1"
android:paddingTop="5dp"
android:paddingBottom="5dp"
android:text="THEME"
android:textColor="#color/black"
android:textSize="15dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/SettingsFragmentAccountSettings" />
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:paddingTop="5dp"
android:paddingBottom="5dp"
android:text="Dark Mode"
android:textColor="#color/black"
android:textSize="20dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/textView4" />
<Switch
android:id="#+id/SettingsFragmentDarkModeSwitch"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="52dp"
android:scaleX="1.25"
android:scaleY="1.25"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.94"
app:layout_constraintStart_toEndOf="#+id/textView2"
app:layout_constraintTop_toBottomOf="#+id/SettingsFragmentAccountSettings" />
<TextView
android:id="#+id/r"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:background="#a8a4a1"
android:paddingTop="5dp"
android:paddingBottom="5dp"
android:text="OTHER"
android:textColor="#color/black"
android:textSize="15dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/SettingsFragmentDarkModeSwitch" />
<TextView
android:id="#+id/SettingsFragmentFAQ"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:paddingTop="5dp"
android:paddingBottom="5dp"
android:text="FAQ"
android:textColor="#color/black"
android:textSize="20dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/r" />
<TextView
android:id="#+id/SettingsFragmentSupport"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:paddingTop="5dp"
android:paddingBottom="5dp"
android:text="Support"
android:textColor="#color/black"
android:textSize="20dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/SettingsFragmentFAQ" />
<TextView
android:id="#+id/SettingsFragmentPolicy"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:paddingTop="5dp"
android:paddingBottom="5dp"
android:text="Content Policy & EULA"
android:textColor="#color/black"
android:textSize="20dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/SettingsFragmentSupport" />
<TextView
android:id="#+id/SettingsFragmentUSerAgreement"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:paddingTop="5dp"
android:paddingBottom="5dp"
android:text="User Agreement"
android:textColor="#color/black"
android:textSize="20dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/SettingsFragmentPolicy" />
<TextView
android:id="#+id/SettingsFragmentBugReport"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:paddingTop="5dp"
android:paddingBottom="5dp"
android:text="Report A Bug"
android:textColor="#color/black"
android:textSize="20dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/SettingsFragmentUSerAgreement" />
<TextView
android:id="#+id/Build"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:background="#a8a4a1"
android:paddingTop="5dp"
android:paddingBottom="5dp"
android:text="BUILD INFORMATION"
android:textColor="#color/black"
android:textSize="15dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/SettingsFragmentBugReport" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="12dp"
android:text="1.0.0"
android:textSize="15dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.042"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/Build" />
</androidx.constraintlayout.widget.ConstraintLayout>
The fragment code:
package com.example.create4me;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CompoundButton;
import android.widget.Switch;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
public class Settings extends Fragment {
TextView accSettings, FAQ, BugReport, Policy, UserAgg, Support;
Switch darkModeSwitch;
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState){
accSettings = (TextView) getView().findViewById(R.id.SettingsFragmentAccountSettings); <--- This one
FAQ = (TextView) getView().findViewById(R.id.SettingsFragmentFAQ);
BugReport = (TextView) getView().findViewById(R.id.SettingsFragmentBugReport);
Policy = (TextView) getView().findViewById(R.id.SettingsFragmentPolicy);
UserAgg = (TextView) getView().findViewById(R.id.SettingsFragmentUSerAgreement);
Support = (TextView) getView().findViewById(R.id.SettingsFragmentSupport);
darkModeSwitch = (Switch) getView().findViewById(R.id.SettingsFragmentDarkModeSwitch);
accSettings.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(getContext(), AccountSettings.class);
startActivity(intent);
}
});
BugReport.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(getContext(), BugReport.class);
startActivity(intent);
}
});
FAQ.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
alertDiag();
}
});
Policy.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
alertDiag();
}
});
UserAgg.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
alertDiag();
}
});
Support.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
alertDiag();
}
});
darkModeSwitch.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
/*
In here, put 0 into MySqli DB if the isChecked value = False.
Put 1 into MySqli DB if the isChecked value = 1.
*/
}
});
return inflater.inflate(R.layout.settings, container, false);
}
void alertDiag(){
new AlertDialog.Builder(getContext())
.setTitle("Well here we are")
.setMessage("Normally, the user by now would've gone into a website explaining the content of the pressed TextView.\n"
+ "Since we do not have a website or a domain, we show this AlertDialog. Sorry for the turnout!")
.setNegativeButton(android.R.string.no, null)
.show();
}
}

You need to do on the first line of onCreateView:
View view = inflater.inflate(R.layout.settings, container, false);
Then do for each of your findViewById:
view.findViewById(R.id.your_view);
You're inflating the view last instead of first.
Then at the end of onCreateView():
return view;

Please try below way to initialize and return in your oncreateview
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState){
View view = inflater.inflate(R.layout.settings, container, false);
//Init all here like
accSettings = (TextView) view. findViewById(R.id.SettingsFragmentAccountSettings)
//and then return like
return view;
}
Hope it may help you

how can disable scroll recyclerView when moving map?

I created a recyclerView that has several items but the problem is when I want to look for the address inside the map
When I scroll through the map, the recycler view shifts and the map loses scrollability.
enter link description here
//Recycler View Adapter Class
public class AddressAdapter extends RecyclerView.Adapter<AddressAdapter.Holder> {
private List<FakeAddressList> objectList;
public AddressAdapter(List<FakeAddressList> list) {
this.objectList = list;
}
#NonNull
#Override
public Holder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.recycler_address, parent, false);
return new Holder(view);
}
#Override
public void onBindViewHolder(#NonNull Holder holder, int position) {
holder.bindAddressList(objectList.get(position));
holder.imgClose.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
objectList.remove(position);
notifyDataSetChanged();
}
});
holder.imgEditLocation.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
AddAddressFragment addressFragment = new AddAddressFragment();
FragmentTransaction ft = fm.beginTransaction();
Bundle bundle = new Bundle();
bundle.putString("Title", objectList.get(position).getTitle());
bundle.putString("Address", objectList.get(position).getAddress());
bundle.putString("Phone", objectList.get(position).getPhoneNumber());
addressFragment.setArguments(bundle);
ft.replace(R.id.content_view, addressFragment).addToBackStack(null).commit();
}
});
holder.FooterLayout.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
AddDataFragment addDataFragment = new AddDataFragment();
FragmentTransaction ft = fm.beginTransaction();
Bundle bundle = new Bundle();
bundle.putString("Title", objectList.get(position).getAddress());
bundle.putString("Address", objectList.get(position).getAddress());
bundle.putString("Phone", objectList.get(position).getPhoneNumber());
addDataFragment.setArguments(bundle);
ft.replace(R.id.content_view, addDataFragment).addToBackStack(null).commit();
}
});
}
#Override
public int getItemCount() {
return objectList.size();
}
public class Holder extends RecyclerView.ViewHolder {
public TextView txtTitle;
public TextView txtSelect;
public TextView txtAddress;
public TextView txtPhone;
public ImageView imgClose;
public ImageView imgEditLocation;
public ConstraintLayout FooterLayout;
public MapView map;
public Holder(#NonNull View itemView) {
super(itemView);
txtTitle = itemView.findViewById(R.id.txtTitle);
txtAddress = itemView.findViewById(R.id.txtAddress);
txtPhone = itemView.findViewById(R.id.txtPhoneNumber);
txtSelect = itemView.findViewById(R.id.txtSelect);
imgClose = itemView.findViewById(R.id.imgClose);
imgEditLocation = itemView.findViewById(R.id.imgEditLocation);
FooterLayout = itemView.findViewById(R.id.FooterLayout);
map = itemView.findViewById(R.id.mapView);
txtTitle.setTypeface(Font_shabnam);
txtAddress.setTypeface(Font_shabnam);
txtPhone.setTypeface(Font_shabnam);
txtSelect.setTypeface(Font_shabnam);
}
public void bindAddressList(final FakeAddressList fakeAddressList) {
txtTitle.setText(fakeAddressList.getTitle());
txtAddress.setText(fakeAddressList.getAddress());
txtPhone.setText(fakeAddressList.getPhoneNumber());
if (fakeAddressList.getLng() != null) {
double lng = Double.valueOf(fakeAddressList.getLng());
double lat = Double.valueOf(fakeAddressList.getLat());
addUserMarker(new LngLat(lng, lat));
map.setFocalPointPosition(
new LngLat(Double.valueOf(fakeAddressList.getLng()), Double.valueOf(fakeAddressList.getLat())), 0.25f);
} else {
LngLat focalPoint;
focalPoint = new LngLat(51.33800, 35.69997);
map.setFocalPointPosition(focalPoint, 0f);
}
map.setZoom(15, 0.25f);
map.getLayers().add(NeshanServices.createBaseMap(NeshanMapStyle.STANDARD_DAY));
}
// This method gets a LngLat as input and adds a marker on that position
private void addUserMarker(LngLat loc) {
Marker marker;
VectorElementLayer userMarkerLayer;
userMarkerLayer = NeshanServices.createVectorElementLayer();
map.getLayers().add(userMarkerLayer);
// Creating marker style. We should use an object of type MarkerStyleCreator, set all features on it
// and then call buildStyle method on it. This method returns an object of type MarkerStyle
MarkerStyleCreator markStCr = new MarkerStyleCreator();
markStCr.setSize(20f);
// markStCr.setBitmap(BitmapUtils.createBitmapFromAndroidBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.ic_marker)));
markStCr.setBitmap(BitmapUtils.createBitmapFromAndroidBitmap(BitmapFactory.decodeResource(itemView.getResources(), R.drawable.ic_cherry)));
MarkerStyle markSt = markStCr.buildStyle();
// Creating user marker
marker = new Marker(loc, markSt);
// Clearing userMarkerLayer
// userMarkerLayer.clear();
// Adding user marker to userMarkerLayer, or showing marker on map!
userMarkerLayer.add(marker);
}
}
}
Recycler View Xml Layout
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginEnd="16dp"
android:layout_marginBottom="16dp">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/HeaderLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:background="#drawable/_orange_shape_b_r_l"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0">
<ImageView
android:id="#+id/imgClose"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_marginStart="16dp"
android:layout_marginLeft="16dp"
android:layout_marginTop="16dp"
android:layout_marginBottom="16dp"
android:src="#drawable/ic_close"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ImageView
android:id="#+id/imgEditLocation"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="16dp"
android:layout_marginRight="16dp"
android:layout_marginBottom="16dp"
android:src="#drawable/ic_edit_location"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/txtTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="تهرانپارس"
android:textSize="18dp"
android:textColor="#color/white"
app:layout_constraintBottom_toBottomOf="#+id/imgEditLocation"
app:layout_constraintEnd_toStartOf="#+id/imgEditLocation"
app:layout_constraintStart_toEndOf="#+id/imgClose"
app:layout_constraintTop_toTopOf="#+id/imgClose" />
</androidx.constraintlayout.widget.ConstraintLayout>
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/MiddleLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/white"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/HeaderLayout"
app:layout_constraintVertical_bias="0.0">
<org.neshan.ui.MapView
android:id="#+id/mapView"
android:layout_width="match_parent"
android:layout_height="300dp"
app:layout_constraintTop_toTopOf="parent" />
<ImageView
android:id="#+id/imgAddress"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="16dp"
android:layout_marginRight="16dp"
android:layout_marginBottom="16dp"
android:src="#drawable/ic_address"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/mapView"
app:layout_constraintVertical_bias="0.0" />
<TextView
android:id="#+id/txtAddress"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="خیابان فلانی کوچه 1"
android:textSize="18dp"
app:layout_constraintBottom_toBottomOf="#+id/imgAddress"
app:layout_constraintTop_toTopOf="#+id/imgAddress" />
<ImageView
android:id="#+id/imgPhone"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="16dp"
android:layout_marginRight="16dp"
android:layout_marginBottom="16dp"
android:src="#drawable/ic_phone"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/imgAddress"
app:layout_constraintVertical_bias="0.0" />
<TextView
android:id="#+id/txtPhoneNumber"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="0916123456"
android:textSize="18dp"
app:layout_constraintBottom_toBottomOf="#+id/imgPhone"
app:layout_constraintTop_toTopOf="#+id/imgPhone" />
</androidx.constraintlayout.widget.ConstraintLayout>
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/FooterLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginBottom="8dp"
android:background="#drawable/_black_shape_t_r_l"
android:padding="16dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/MiddleLayout"
app:layout_constraintVertical_bias="0.0">
<TextView
android:id="#+id/txtSelect"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="انتخاب"
android:textColor="#color/white"
android:textSize="18dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
//Fragment that Load Recyclerview
public class RegisterAddressFragment extends Fragment
implements View.OnClickListener {
private RecyclerView recycler_SelectAddress;
private Button btnNewAddress;
private ProgressBar progressBar;
private ConstraintLayout MainLayout;
private Bundle bundle;
private ArrayList<FakeAddressList> list = new ArrayList<>();
#Override
public void onActivityCreated(#Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
this.bundle = getArguments();
if (bundle != null) {
list.add(new FakeAddressList(bundle.getString("Title"),
bundle.getString("Address"),
bundle.getString("Phone"),
bundle.getString("Lng"),
bundle.getString("Lat")));
}
}
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_register_address, container, false);
init(v);
initRecyclerView();
return v;
}
private void init(View v) {
recycler_SelectAddress = v.findViewById(R.id.recycler_SelectAddress);
btnNewAddress = v.findViewById(R.id.btnNewAddress);
btnNewAddress.setOnClickListener(this);
progressBar = v.findViewById(R.id.progressbar);
MainLayout = v.findViewById(R.id.MainLayout);
Thread thread = new Thread() {
#Override
public void run() {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
}
getActivity().runOnUiThread(new Runnable() {
#Override
public void run() {
// Do some stuff
progressBar.setVisibility(View.GONE);
MainLayout.setVisibility(View.VISIBLE);
}
});
}
};
thread.start(); //start the thread
}
private void initRecyclerView() {
list.add(new FakeAddressList("اصفهان", "شاهین شهر خیابان نوشین پلاک 1", "987654321"));
list.add(new FakeAddressList("اهواز", "کیانپارس کوچه بنی هاشم پلاک 33", "123456789"));
LinearLayoutManager layoutManager = new LinearLayoutManager(getContext());
layoutManager.setOrientation(RecyclerView.VERTICAL);
AddressAdapter addressAdapter = new AddressAdapter(list);
recycler_SelectAddress.setLayoutManager(layoutManager);
recycler_SelectAddress.setAdapter(addressAdapter);
}
#Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.btnNewAddress:
AddAddressFragment addressFragment = new AddAddressFragment();
FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.content_view, addressFragment).addToBackStack(null).commit();
break;
}
}
}
Fragment Xml File
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:tools="http://schemas.android.com/tools"
android:background="#color/tusi"
xmlns:app="http://schemas.android.com/apk/res-auto">
<ProgressBar
android:id="#+id/progressbar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:indeterminateTint="#color/red2"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/MainLayout"
tools:visibility="visible"
android:visibility="gone"
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recycler_SelectAddress"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_marginBottom="32dp"
app:layout_constraintBottom_toTopOf="#+id/btnNewAddress"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="#+id/btnNewAddress"
android:layout_width="match_parent"
android:layout_height="0dp"
android:backgroundTint="#color/navy_blue"
android:insetLeft="0dp"
android:insetTop="0dp"
android:insetRight="0dp"
android:insetBottom="0dp"
android:text="آدرس جدید"
android:textSize="22sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.constraintlayout.widget.ConstraintLayout>

I found the solution :
I added below code in the adapter of the recyclerview
map.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View view, MotionEvent motionEvent) {
itemView.getParent().requestDisallowInterceptTouchEvent(true);
return false;
}
});

Why is my ListView showing in one fragment and not the other?

To summarize, I'm building a social media app that displays:
A Newsfeed that shows posts from all user profiles in a given account
A Timeline that shows posts from a specific user profile in the account
I've built a custom BaseAdapter to populate a custom cell within each ListView. The Newsfeed ListView (that populates posts from all users on the account) is populating correctly.
The Timeline ListView (that populates posts from one profile on the account) is not showing. I've set breakpoints to ensure that my ArrayList is not null or empty when populating the Timeline ListView. In addition, breakpoints verify that my custom adapter is, in fact, pulling data from the ArrayList and inflating cells. However, the ListView is simply not visible.
Here is the layout file for my Newsfeed fragment (that is working correctly):
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/colorSkyPrimary">
<android.support.constraint.ConstraintLayout
android:id="#+id/constraintLayout"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:background="#android:color/white"
android:elevation="16dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<EditText
android:id="#+id/input_post"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="32dp"
android:layout_marginEnd="32dp"
android:backgroundTint="#color/colorSkyPrimary"
android:ems="10"
android:gravity="start|top"
android:hint="#string/what_s_going_on"
android:importantForAutofill="no"
android:inputType="textMultiLine"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:targetApi="o" />
<ImageButton
android:id="#+id/button_photo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:backgroundTint="#android:color/white"
android:contentDescription="#string/camera_button"
app:layout_constraintBottom_toBottomOf="#+id/input_post"
app:layout_constraintEnd_toEndOf="#+id/input_post"
app:srcCompat="#drawable/camera_icon" />
<Button
android:id="#+id/button_cancel"
style="#style/Widget.AppCompat.Button.Borderless"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="48dp"
android:layout_marginTop="8dp"
android:text="#android:string/cancel"
android:textColor="#color/colorGrassPrimary"
android:visibility="gone"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/post_image" />
<Button
android:id="#+id/button_update"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:layout_marginEnd="48dp"
android:backgroundTint="#color/colorGrassPrimary"
android:text="#string/update"
android:textColor="#color/colorButtonText"
android:visibility="gone"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toBottomOf="#+id/post_image" />
<ImageView
android:id="#+id/post_image"
android:layout_width="0dp"
android:layout_height="300dp"
android:contentDescription="#string/post_image"
android:scaleType="fitCenter"
android:visibility="gone"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/input_post"
tools:srcCompat="#tools:sample/avatars" />
</android.support.constraint.ConstraintLayout>
<ListView
android:id="#+id/list_newsfeed"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintBottom_toTopOf="#+id/picker_image"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/constraintLayout"
app:layout_constraintVertical_bias="0.0" />
<android.support.constraint.ConstraintLayout
android:id="#+id/picker_image"
android:layout_width="0dp"
android:layout_height="75dp"
android:background="#android:color/white"
android:elevation="16dp"
android:visibility="gone"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent">
<android.support.constraint.Guideline
android:id="#+id/guideline14"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.5" />
<ImageButton
android:id="#+id/button_camera"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:layout_marginEnd="32dp"
android:layout_marginBottom="8dp"
android:background="#android:color/transparent"
android:contentDescription="#string/camera_button"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#+id/guideline14"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#drawable/camera_icon_large" />
<ImageButton
android:id="#+id/button_gallery"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="32dp"
android:layout_marginTop="8dp"
android:layout_marginBottom="8dp"
android:background="#android:color/transparent"
android:contentDescription="#string/gallery_button"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="#+id/guideline14"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.375"
app:srcCompat="#drawable/gallery_icon" />
</android.support.constraint.ConstraintLayout>
Here is the layout file for my Profile fragment (in which the ListView is not showing at runtime)
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/colorSkyPrimary">
<android.support.constraint.ConstraintLayout
android:id="#+id/constraintLayout4"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:background="#android:color/white"
android:elevation="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<de.hdodenhof.circleimageview.CircleImageView
android:id="#+id/profile_photo"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_marginStart="32dp"
android:layout_marginTop="32dp"
android:src="#drawable/male_icon_large"
app:civ_border_color="#android:color/transparent"
app:civ_border_width="2dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/display_name"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="8dp"
android:text="#string/brelynn_mack"
android:textAlignment="viewStart"
android:textColor="#color/colorTextDark"
android:textSize="18sp"
app:layout_constraintEnd_toStartOf="#+id/button_delete_profile"
app:layout_constraintStart_toEndOf="#+id/profile_photo"
app:layout_constraintTop_toTopOf="#+id/profile_photo" />
<TextView
android:id="#+id/display_timestamp"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp"
android:text="#string/may_14_2019_9_59_pm"
android:textAlignment="viewStart"
android:textColor="#color/colorTextLight"
android:textSize="14sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="#+id/profile_photo"
app:layout_constraintTop_toBottomOf="#+id/display_name" />
<TextView
android:id="#+id/display_last_location"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:text="#string/_8741_grouse_run_lane_28314"
android:textAlignment="viewStart"
android:textColor="#color/colorTextPrimary"
android:textSize="12sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="#+id/profile_photo"
app:layout_constraintTop_toBottomOf="#+id/display_timestamp" />
<ImageButton
android:id="#+id/button_delete_profile"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:layout_marginEnd="16dp"
android:background="#android:color/white"
android:contentDescription="#string/trash_button"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#drawable/trash_icon" />
<ImageButton
android:id="#+id/button_photo"
android:layout_width="35dp"
android:layout_height="35dp"
android:layout_marginStart="8dp"
android:layout_marginBottom="16dp"
android:background="#android:color/white"
android:contentDescription="#string/camera_button"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="#+id/profile_photo"
app:layout_constraintTop_toBottomOf="#+id/profile_photo"
app:srcCompat="#drawable/camera_icon" />
<ImageButton
android:id="#+id/button_family"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginBottom="8dp"
android:background="#android:color/white"
android:contentDescription="#string/family_button"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:srcCompat="#drawable/family_icon_small" />
<ImageButton
android:id="#+id/button_gallery"
android:layout_width="35dp"
android:layout_height="35dp"
android:layout_marginEnd="8dp"
android:background="#android:color/transparent"
android:contentDescription="#string/gallery_button"
android:scaleType="fitCenter"
app:layout_constraintEnd_toEndOf="#+id/profile_photo"
app:layout_constraintTop_toBottomOf="#+id/profile_photo"
app:srcCompat="#drawable/gallery_icon" />
</android.support.constraint.ConstraintLayout>
<ListView
android:id="#+id/list_posts"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/constraintLayout4" />
Here is my custom adapter:
public class NewsfeedAdapter extends BaseAdapter {
// Class properties
private static final String TAG = "NewsfeedAdapter";
public static final String EXTRA_POSTS = "extra_posts";
public static final String EXTRA_POSITION = "extra_position";
private final Context context;
ArrayList<Post> posts;
Account account;
// Constructor
public NewsfeedAdapter(Context context, ArrayList<Post> posts, Account account) {
this.context = context;
this.posts = posts;
this.account = account;
}
// System generated methods
#Override
public int getCount() {
return posts.size();
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public Object getItem(int position) {
return posts.get(position);
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
final Post post = posts.get(position);
if(convertView == null) {
LayoutInflater layoutInflater = LayoutInflater.from(context);
convertView = layoutInflater.inflate(R.layout.cell_newsfeed, null);
}
TextView profileNameDisplay = convertView.findViewById(R.id.display_profile_name);
String name = post.getPosterName() + " " + account.getFamilyName();
profileNameDisplay.setText(name);
TextView timestampDisplay = convertView.findViewById(R.id.display_timestamp);
SimpleDateFormat dateFormat = new SimpleDateFormat("MMMM dd, yyyy # hh:mm a", Locale.getDefault());
String timestamp = dateFormat.format(post.getTimeStamp());
timestampDisplay.setText(timestamp);
TextView postMessageDisplay = convertView.findViewById(R.id.display_post_message);
postMessageDisplay.setText(post.getPostMessage());
if (post.getHasImage()) {
AccountUtils.loadProfilePhoto(context, convertView, post.getPosterId());
}
else {
ImageView postImage = convertView.findViewById(R.id.display_post_image);
postImage.setVisibility(View.GONE);
}
PostUtils.loadPostImage(convertView, post.getPostId());
ImageButton deleteButton = convertView.findViewById(R.id.button_delete_post);
ImageButton editButton = convertView.findViewById(R.id.button_edit_post);
toggleButtons(post, editButton, deleteButton);
deleteButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
AlertDialog.Builder alertBuilder = new AlertDialog.Builder(context);
alertBuilder.setTitle(context.getString(R.string.delete_post));
alertBuilder.setMessage(context.getString(R.string.delete_post_message));
alertBuilder.setPositiveButton(context.getString(R.string.delete), new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
posts.remove(position);
PostUtils.deletePost(context, post.getPostId(), post.getPosterId());
notifyDataSetChanged();
PostUtils.listenForNews(context);
}
});
alertBuilder.setNegativeButton(context.getString(R.string.cancel), null);
AlertDialog alert = alertBuilder.create();
alert.show();
}
});
editButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent editIntent = new Intent(context, EditPostActivity.class);
editIntent.putExtra(EXTRA_POSTS, posts);
editIntent.putExtra(EXTRA_POSITION, position);
context.startActivity(editIntent);
}
});
return convertView;
}
// Custom methods
private void toggleButtons(Post post, ImageButton editButton, ImageButton deleteButton) {
long twoMinutes = System.currentTimeMillis() - (2 * 60 * 1000);
long fiveMinutes = System.currentTimeMillis() - (5 * 60 * 1000);
if (post.getTimeStamp().getTime() < fiveMinutes) {
editButton.setVisibility(View.GONE);
}
else {
editButton.setVisibility(View.VISIBLE);
}
if (post.getTimeStamp().getTime() < twoMinutes) {
deleteButton.setVisibility(View.GONE);
}
else {
deleteButton.setVisibility(View.VISIBLE);
}
}
Here are the lifecycle methods from the Newsfeed fragment that load my data and set the adapter:
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_newsfeed, container, false);
PostUtils.listenForNews(getActivity());
mPosts = PostUtils.loadNewsfeed(getActivity());
mNewsfeed = view.findViewById(R.id.list_newsfeed);
mImagePicker = view.findViewById(R.id.picker_image);
mPhotoView = view.findViewById(R.id.post_image);
AccountUtils.listenForUpdates(getActivity());
setClickListener(view);
setFocusListener(view);
return view;
}
#Override
public void onResume() {
super.onResume();
mPosts = PostUtils.loadNewsfeed(getActivity());
Account account = AccountUtils.loadAccount(getActivity());
mNewsfeedAdapter = new NewsfeedAdapter(getActivity(), mPosts, account);
mNewsfeed.setAdapter(mNewsfeedAdapter);
}
Here are the lifecycle methods from my Profile fragment where the same functionality should work for a slightly different set of data:
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_profile, container, false);
try {
if(getActivity().getIntent() != null && getActivity().getIntent().getAction().equals(FamilyProfileFragment.ACTION_EDIT_PROFILE)) {
mEditingSelf = false;
mIsParent = true;
mProfile = (Profile) getActivity().getIntent().getSerializableExtra(FamilyProfileFragment.EXTRA_PROFILE);
String selectedName = mProfile.getFirstName();
String loadedName = AccountUtils.loadProfile(getActivity()).getFirstName();
if(selectedName.equals(loadedName)) {
mEditingSelf = true;
}
}
else {
mEditingSelf = true;
mProfile = AccountUtils.loadProfile(getActivity());
if(mProfile instanceof Parent) {
mIsParent = true;
}
else {
mIsParent = false;
}
}
}
catch (Exception e) {
e.printStackTrace();
mEditingSelf = true;
mProfile = AccountUtils.loadProfile(getActivity());
if(mProfile instanceof Parent) {
mIsParent = true;
}
else {
mIsParent = false;
}
}
mAccount = AccountUtils.loadAccount(getActivity());
AccountUtils.loadProfilePhoto(getActivity(), view, mProfile.getProfileId());
mPhotoView = view.findViewById(R.id.profile_photo);
PostUtils.listenForTimeline(getActivity(), mProfile);
mPosts = PostUtils.loadTimeline(getActivity());
mTimeline = view.findViewById(R.id.list_posts);
setClickListener(view);
setTextDisplay(view);
populateProfile(view);
return view;
}
#Override
public void onResume() {
super.onResume();
mPosts = PostUtils.loadTimeline(getActivity());
mNewsfeedAdapter = new NewsfeedAdapter(getActivity(), mPosts, mAccount);
mTimeline.setAdapter(mNewsfeedAdapter);
}

My constraints were set up incorrectly in the Profile fragment. Updated the XML to the following:
<ListView
android:id="#+id/list_newsfeed"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/constraintLayout4" />

ImageButton fragment not working

Guys I am just a student, creating a movieapp as a project and I need some help, iI've been looking online and followed all the step and yet I am not able to click the imagebutton in the fragment. Please help me and teach me what's wrong.
im currently just doing imgdp which you can see the id of imgdp and the page i want to direct to is Deadpool2.class.
This is my fragment code:
public class fragment4 extends Fragment {
ImageButton imgbutton;
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
private String mParam1;
private String mParam2;
private OnFragmentInteractionListener mListener;
public fragment4() {
// Required empty public constructor
}
public static fragment4 newInstance(String param1, String param2) {
fragment4 fragment = new fragment4();
Bundle args = new Bundle();
args.putString(ARG_PARAM1, param1);
args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_fragment4, container, false);
imgbutton = (ImageButton) view.findViewById(R.id.imgdp);
imgbutton.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View v) {
startActivity(new Intent(getActivity(), Deadpool2.class));
}
});
return view;
}
public void onButtonPressed(Uri uri) {
if (mListener != null) {
mListener.onFragmentInteraction(uri);
}
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof OnFragmentInteractionListener) {
mListener = (OnFragmentInteractionListener) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement OnFragmentInteractionListener");
}
}
#Override
public void onDetach() {
super.onDetach();
mListener = null;
}
public interface OnFragmentInteractionListener {
void onFragmentInteraction(Uri uri);
}
}
My XML
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".fragment4">
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".Home$PlaceholderFragment">
<TextView
android:id="#+id/textView13"
android:layout_width="80dp"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="Action"
android:textSize="18sp"
android:textStyle="bold|italic"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.063"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0" />
<ImageButton
android:id="#+id/imgdp"
android:layout_width="118dp"
android:layout_height="155dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="9dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:scaleType="centerCrop"
android:src="#drawable/deadpool"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.028"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.983" />
<ImageButton
android:id="#+id/imageButton7"
android:layout_width="118dp"
android:layout_height="155dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:scaleType="centerCrop"
android:src="#drawable/avengersinfinitywar"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.971"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.52" />
<ImageButton
android:id="#+id/imageButton6"
android:layout_width="118dp"
android:layout_height="155dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:scaleType="centerCrop"
android:src="#drawable/avengersinfinitywar"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.498"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.061" />
<ImageButton
android:id="#+id/imageButton3"
android:layout_width="118dp"
android:layout_height="155dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:scaleType="centerCrop"
android:src="#drawable/thor"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.498"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.983" />
<ImageButton
android:id="#+id/imageButton8"
android:layout_width="118dp"
android:layout_height="155dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:scaleType="centerCrop"
android:src="#drawable/jurassic"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.028"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.522" />
<ImageButton
android:id="#+id/imageButton5"
android:layout_width="118dp"
android:layout_height="155dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:scaleType="centerCrop"
android:src="#drawable/thor"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.971"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.061" />
<ImageButton
android:id="#+id/imageButton2"
android:layout_width="118dp"
android:layout_height="155dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:scaleType="centerCrop"
android:src="#drawable/incredibles"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.028"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.063" />
<ImageButton
android:id="#+id/imageButton4"
android:layout_width="118dp"
android:layout_height="155dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:scaleType="centerCrop"
android:src="#drawable/kingsman"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.971"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.983" />
<ImageButton
android:id="#+id/imageButton9"
android:layout_width="118dp"
android:layout_height="155dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:scaleType="centerCrop"
android:src="#drawable/deadpool"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.498"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.52" />
<TextView
android:id="#+id/textView14"
android:layout_width="90dp"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="Adventure"
android:textSize="18sp"
android:textStyle="bold|italic"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.065"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.347" />
<TextView
android:id="#+id/textView15"
android:layout_width="90dp"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="Comdey"
android:textSize="18sp"
android:textStyle="bold|italic"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.065"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.691" />
</android.support.constraint.ConstraintLayout>
This is My Home activity
public class Home extends AppCompatActivity {
private DrawerLayout mDrawerLayout;
private ActionBarDrawerToggle mToggle;
private Toolbar mToolbar;
private Home.SectionsPagerAdapter mSectionsPagerAdapter;
private ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
mToolbar = (Toolbar) findViewById(R.id.nav_action);
setSupportActionBar(mToolbar);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout);
mToggle = new ActionBarDrawerToggle(this, mDrawerLayout, R.string.open, R.string.close);
mDrawerLayout.addDrawerListener(mToggle);
mToggle.syncState();
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
mSectionsPagerAdapter = new Home.SectionsPagerAdapter(getSupportFragmentManager());
mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setAdapter(mSectionsPagerAdapter);
TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
mViewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
tabLayout.addOnTabSelectedListener(new TabLayout.ViewPagerOnTabSelectedListener(mViewPager));
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if (mToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
public static class PlaceholderFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
private static final String ARG_SECTION_NUMBER = "section_number";
public PlaceholderFragment() {
}
/**
* Returns a new instance of this fragment for the given section
* number.
*/
public static PlaceholderFragment newInstance(int sectionNumber) {
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = null;
switch(getArguments().getInt(ARG_SECTION_NUMBER))
{
case 1:
rootView = inflater.inflate(R.layout.fragment_fragment1, container, false);
break;
case 2:
rootView = inflater.inflate(R.layout.fragment_fragment2, container, false);
break;
case 3:
rootView = inflater.inflate(R.layout.fragment_fragment3, container, false);
break;
case 4:
rootView = inflater.inflate(R.layout.fragment_fragment4, container, false);
break;
}
return rootView;
}
}
/**
* A {#link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a PlaceholderFragment (defined as a static inner class below).
return PlaceholderFragment.newInstance(position + 1);
}
#Override
public int getCount() {
// Show 3 total pages.
return 4;
}
#Override
public CharSequence getPageTitle(int position){
switch (position){
case 0:
return "SECTION 1";
case 1:
return "SECTION 2";
case 2:
return "SECTION 3";
case 4:
return "SECTION 4";
}
return null;
}
}
}

What's the error you get? Try to make your question clearer to get proper help.