Develop Reference

Recyclerview (No adapter attached; skipping layout)

i'm just setup my RecyclerView but there's not appear in my emulator & there is error "E/RecyclerView: No adapter attached; skipping layout" Could you guys help me to find my failure?
This is my application layout :
Click here to see my application layout view
StockContent.Java (Fragment) :
package com.example.psmandroidapps;
import androidx.annotation.Nullable;
import androidx.appcompat.app.ActionBar;
import androidx.appcompat.app.AppCompatActivity;
import androidx.cardview.widget.CardView;
import androidx.core.graphics.drawable.RoundedBitmapDrawable;
import androidx.core.graphics.drawable.RoundedBitmapDrawableFactory;
import androidx.fragment.app.Fragment;
import androidx.recyclerview.widget.GridLayoutManager;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.content.Context;
import android.graphics.Color;
import android.graphics.drawable.GradientDrawable;
import android.media.Image;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.Toast;
import android.widget.Toolbar;
import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.List;
public class StockContent extends Fragment {
RecyclerView StockRecyclerView;
List<ModalClass> mList;
CustomAdapter customAdapter;
public StockContent() {
// Required empty public constructor
}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View stockview = inflater.inflate(R.layout.stock_content, container, false);
StockRecyclerView = stockview.findViewById(R.id.StockRecyclerView);
customAdapter = new CustomAdapter(mList,getContext());
StockRecyclerView.setAdapter(customAdapter);
StockRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
return stockview;
}
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//just for sample only
mList = new ArrayList<>();
mList.add(new ModalClass(R.drawable.profilepicture,"Mitsubishi S-N50"));
mList.add(new ModalClass(R.drawable.logodetail,"Mitsubishi S-N50"));
mList.add(new ModalClass(R.drawable.logo,"Mitsubishi S-N50"));
mList.add(new ModalClass(R.drawable.profilepicture,"Mitsubishi S-N50"));
mList.add(new ModalClass(R.drawable.logodetail,"Mitsubishi S-N50"));
mList.add(new ModalClass(R.drawable.logo,"Mitsubishi S-N50"));
}
}
StockContent.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"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#F3FFFC">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/StockRecyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
</androidx.recyclerview.widget.RecyclerView>
</LinearLayout>
Stock_CardView.XML (for recyclerview content) :
<?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"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<androidx.cardview.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:cardCornerRadius="15dp"
android:layout_margin="20dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<androidx.cardview.widget.CardView
android:layout_width="100dp"
android:layout_height="100dp"
app:cardCornerRadius="30dp"
android:layout_margin="15dp"
android:layout_weight="0.1">
<ImageView
android:id="#+id/img_goodspicture"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="#drawable/profilepicture"
android:scaleType="centerCrop"/>
</androidx.cardview.widget.CardView>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_weight="1"
android:layout_marginTop="10dp"
android:layout_marginRight="15dp"
>
<TextView
android:id="#+id/txt_goodsname"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Mitsubishi S-N10 (220V)"
android:textColor="#000000"
android:fontFamily="#font/sarabun_bold"
android:textSize="21dp"
android:layout_marginBottom="0dp"/>
<TextView
android:id="#+id/txt_goodstype"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Jenis : Contactor"
android:textColor="#000000"
android:fontFamily="#font/sarabun_regular"
android:textSize="12.5dp" />
<TextView
android:id="#+id/txt_goodsstock"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Stok : 105 pcs"
android:textColor="#000000"
android:fontFamily="#font/sarabun_regular"
android:textSize="12.5dp"/>
<TextView
android:id="#+id/txt_dateofgoodsentry"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Tanggal masuk : 29/07/2020"
android:textColor="#000000"
android:fontFamily="#font/sarabun_regular"
android:textSize="12.5dp"/>
</LinearLayout>
</LinearLayout>
</androidx.cardview.widget.CardView>
</LinearLayout>
ModalClass.Java :
package com.example.psmandroidapps;
public class ModalClass {
int image;
String text;
public ModalClass(int image, String text) {
this.image = image;
this.text = text;
}
public int getImage() {
return image;
}
public void setImage(int image) {
this.image = image;
}
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
}
CustomAdapter.Java :
package com.example.psmandroidapps;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import java.util.List;
public class CustomAdapter extends RecyclerView.Adapter<CustomAdapter.MyViewHolder> {
List<ModalClass> mList;
Context context;
public CustomAdapter(List<ModalClass> mList, Context context) {
this.mList = mList;
this.context = context;
}
#NonNull
#Override
public MyViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
LayoutInflater layoutInflater = LayoutInflater.from(context);
View view = layoutInflater.inflate(R.layout.stock_cardview,parent,false);
return new MyViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull MyViewHolder holder, int position) {
holder.imageView.setImageResource(mList.get(position).getImage());
holder.textView.setText(mList.get(position).getText());
}
#Override
public int getItemCount() {
return mList.size();
}
public class MyViewHolder extends RecyclerView.ViewHolder {
ImageView imageView;
TextView textView;
public MyViewHolder(#NonNull View itemView) {
super(itemView);
imageView=itemView.findViewById(R.id.img_goodspicture);
textView=itemView.findViewById(R.id.txt_goodsname);
}
}
}
Thats the code of mine.. the result is nothing, nothing showing in my emulator.. Thank you for read this question, hope you guys can help me to solve my problem here. Thank you guys! have a nice day

Intro slide helper by viewPager

i wanted to use intro slider to my App
i learned it by this video https://www.youtube.com/watch?v=byLKoPgB7yA&t=22s
I do like video tutorial but I have a problem with dots
when I slide to any page the dots(. ) will be copy and increase
where is my problem and what should I do ?
package time.one.just.show.introslyder;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.Html;
import android.widget.LinearLayout;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
private ViewPager mSlideViewPager;
private LinearLayout mDotsLayout;
private SlyderAdapter slyderAdapter;
//dots of any Slide pages
private TextView[] mDots;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mSlideViewPager = findViewById(R.id.viewPager);
mDotsLayout = findViewById(R.id.dots);
slyderAdapter = new SlyderAdapter(this);
mSlideViewPager.setAdapter(slyderAdapter);
addDotsIndiccator(0);
mSlideViewPager.addOnPageChangeListener(viewListener);
}
private void addDotsIndiccator(int position) {
mDots = new TextView[3];
for (int i = 0; i < mDots.length; i++) {
mDots[i] = new TextView(this);
mDots[i].setText(Html.fromHtml("&#8226"));
mDots[i].setTextSize(35);
mDots[i].setTextColor(getResources().getColor(R.color.colorWhiteNearToGray));
mDotsLayout.addView(mDots[i]);
}
if (mDots.length > 0) {
mDots[position].setTextColor(getResources().getColor(R.color.colorWite));
}
}
ViewPager.OnPageChangeListener viewListener = new ViewPager.OnPageChangeListener() {
#Override
public void onPageScrolled(int i, float v, int i1) {
}
#Override
public void onPageSelected(int i) {
addDotsIndiccator(i);
}
#Override
public void onPageScrollStateChanged(int i) {
}
};}
And this is my SideAdapter class
package time.one.just.show.introslyder;
import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v4.view.PagerAdapter;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;
public class SlyderAdapter extends PagerAdapter {
Context context;
LayoutInflater layoutInflater;
public SlyderAdapter(Context context) {
this.context = context;
}
public int[] slide_imagesArray = {
R.drawable.eat,
R.drawable.men,
R.drawable.sleep};
public String[] slide_headerArray = {
"EAT", "men", "code"};
public String[] slide_descriptionArray = {
"this is 1st", "this is 2nd", "this is 3rd"
};
#Override
public int getCount() {
return slide_headerArray.length;
}
#Override
public boolean isViewFromObject(#NonNull View view, #NonNull Object o) {
return view == o;
}
#NonNull
#Override
public Object instantiateItem(#NonNull ViewGroup container, int position) {
layoutInflater = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
View view = layoutInflater.inflate(R.layout.slide_layoout, container, false);
ImageView slideImageView = (ImageView) view.findViewById(R.id.slideImage);
TextView slideheader = (TextView) view.findViewById(R.id.slideheader);
TextView slidedescription = (TextView) view.findViewById(R.id.slideDescription);
slideImageView.setImageResource(slide_imagesArray[position]);
slideheader.setText(slide_headerArray[position]);
slidedescription.setText(slide_descriptionArray[position]);
container.addView(view);
return view;
}
#Override
public void destroyItem(#NonNull ViewGroup container, int position, #NonNull Object object) {
container.removeView((RelativeLayout) object);
}
}
and this is my SliderLayout
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent" android:layout_height="match_parent">
<ImageView
android:id="#+id/slideImage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="89dp"
app:srcCompat="#drawable/eat" />
<TextView
android:id="#+id/slideheader"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentBottom="true"
android:layout_marginStart="122dp"
android:layout_marginBottom="287dp"
android:text="بدون نیاز به اینترنت"
android:textSize="20sp"
android:textStyle="bold" />
<TextView
android:id="#+id/slideDescription"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentBottom="true"
android:layout_marginStart="0dp"
android:layout_marginBottom="171dp"
android:text="آرشیو کامل این خواننده محبوب همیشه در جیب شم ، ، هر کدام ز آهنگ ها را خواستید می توانید دانلود کنید و هر زمان دلتون خوست به آن ها گوش بدهید حتی بدون نیز به اینترنت" />
</RelativeLayout>
and activtymain xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:background="#drawable/main_background"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<android.support.v4.view.ViewPager
android:id="#+id/viewPager"
android:layout_width="match_parent"
android:layout_height="match_parent">
</android.support.v4.view.ViewPager>
<LinearLayout
android:id="#+id/dots"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:orientation="horizontal"></LinearLayout>
</RelativeLayout>

I found a solution
just by add this inside my App
mDotsLayout.removeAllViews();
thank you all

How to create android programming on layouts that have different ViewPager

How do I create android programming, If I click,
tab 1 - ViewPager1 Appears Fragment1 and ViewPager2 Appears Fragment1A
and
If I click,
tab 2 - ViewPager1 Appears Fragmen2 and ViewPager2 Appears Fragmen2A.
PagerAdapter.java
package com.papaozi.ground;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
public class PagerAdapter extends FragmentStatePagerAdapter {
int mNumOfTabs;
public PagerAdapter(FragmentManager fm, int NumOfTabs) {
super(fm);
this.mNumOfTabs = NumOfTabs;
}
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
Satu tab1 = new Satu();
return tab1;
case 1:
Dua tab2 = new Dua();
return tab2;
default:
return null;
}
}
#Override
public int getCount() {
return mNumOfTabs;
}
}
ProfilActivity.java
package com.papaozi.ground;
import android.content.res.Resources;
import android.graphics.drawable.Drawable;
import android.provider.ContactsContract;
import android.support.annotation.DrawableRes;
import android.support.design.widget.CoordinatorLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.text.Layout;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.List;
public class ProfilActivity extends AppCompatActivity {
ViewPager simpleViewPager;
private TabLayout tabLayout, tabLayout2;
private ViewPager viewPager, viewPager2;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_profil);
viewPager = (ViewPager) findViewById(R.id.viewpager);
createViewPager(viewPager);
viewPager2 = (ViewPager) findViewById(R.id.viewpager2);
createViewPager2(viewPager2);
tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(viewPager);
tabLayout2 = (TabLayout) findViewById(R.id.tabs);
tabLayout2.setupWithViewPager(viewPager2);
createTabIcons();
}
private void createTabIcons() {
LinearLayout tabLinearLayout = (LinearLayout) LayoutInflater.from(this).inflate(R.layout.custom_tab, null);
TextView tabOne = (TextView) tabLinearLayout.findViewById(R.id.tabContent);
tabOne.setText("Paslon 1");
tabOne.setCompoundDrawablesWithIntrinsicBounds(R.drawable.icontoast, 0, 0, 0);
tabLayout2.getTabAt(0).setCustomView(tabOne);
tabLayout.getTabAt(0).setCustomView(tabOne);
LinearLayout tabLinearLayout2 = (LinearLayout) LayoutInflater.from(this).inflate(R.layout.custom_tab, null);
TextView tabTwo = (TextView) tabLinearLayout2.findViewById(R.id.tabContent);
tabTwo.setText("Paslon 2");
tabTwo.setCompoundDrawablesWithIntrinsicBounds(R.drawable.icontoast, 0, 0, 0);
tabLayout2.getTabAt(1).setCustomView(tabTwo);
tabLayout.getTabAt(1).setCustomView(tabTwo);
}
private void createViewPager(ViewPager viewPager) {
ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
adapter.addFrag(new SatuA(), "Tab 1");
adapter.addFrag(new DuaA(), "Tab 2");
viewPager.setAdapter(adapter);
}
class ViewPagerAdapter extends FragmentPagerAdapter {
private final List<Fragment> mFragmentList = new ArrayList<>();
private final List<String> mFragmentTitleList = new ArrayList<>();
public ViewPagerAdapter(FragmentManager manager) {
super(manager);
}
#Override
public Fragment getItem(int position) {
return mFragmentList.get(position);
}
#Override
public int getCount() {
return mFragmentList.size();
}
public void addFrag(Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
#Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
}
private void createViewPager2(ViewPager viewPager2) {
ViewPagerAdapter2 adapter = new ViewPagerAdapter2(getSupportFragmentManager());
adapter.addFrag(new Satu(), "Tab 1");
adapter.addFrag(new Dua(), "Tab 2");
viewPager2.setAdapter(adapter);
}
class ViewPagerAdapter2 extends FragmentPagerAdapter {
private final List<Fragment> mSilit1 = new ArrayList<>();
private final List<String> mSempak1 = new ArrayList<>();
public ViewPagerAdapter2(FragmentManager manager) {
super(manager);
}
#Override
public Fragment getItem(int position) {
return mSilit1.get(position);
}
#Override
public int getCount() {
return mSilit1.size();
}
public void addFrag(Fragment fragment, String title) {
mSilit1.add(fragment);
mSempak1.add(title);
}
#Override
public CharSequence getPageTitle(int position) {
return mSempak1.get(position);
}
}
}
fragmen1.java
package com.papaozi.ground;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class Satu extends Fragment {
public Satu() {
// Required empty public constructor
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_dua, container, false);
}
}
fragmen2.java
package com.papaozi.ground;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class Dua extends Fragment {
public Dua() {
// Required empty public constructor
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_dua, container, false);
}
}
activity_profil.xml
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<android.support.v4.widget.NestedScrollView
android:id="#+id/nestedscrollview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/backgroudscrollgrid_color"
android:fillViewport="true"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<android.support.v4.view.ViewPager
android:id="#+id/viewpager2"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.v4.widget.NestedScrollView>
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="#dimen/app_bar_height"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
android:fitsSystemWindows="true">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="206dip"
android:background="#color/background"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
android:fitsSystemWindows="true"
app:contentScrim="#color/putih"
app:expandedTitleMarginStart="48dp"
app:expandedTitleMarginBottom="20dp"
app:expandedTitleMarginEnd="64dp">
<android.support.v4.view.ViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<ImageView
android:id="#+id/backdrop"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:fitsSystemWindows="true"
app:layout_collapseMode="parallax" />
<TextView
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"
app:layout_collapseMode="pin" />
</android.support.design.widget.CollapsingToolbarLayout>
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabBackground="#android:color/darker_gray"
app:tabIndicatorColor="#f00"
app:tabSelectedTextColor="#f00"
app:tabTextColor="#000" />
</android.support.design.widget.AppBarLayout>
</android.support.design.widget.CoordinatorLayout>
custom_tab.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center">
<TextView
android:id="#+id/tabContent"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:textAlignment="center"
android:textColor="#android:color/white"
android:gravity="center"/>
</LinearLayout>
fragmen1.xml and fragmen2.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="info.androidhive.materialtabs.fragments.OneFragment">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="Satu Fragment"
android:textColor="#color/putih"
android:textSize="40dp"
android:textStyle="bold" />
</RelativeLayout>
thanks for helpme.

There is a simple tutorial for your purpose. You can check this link.
But it replace fragments when normal button clicked. You can just simply move the codes into your tab's click event. Just like that : See the link
If you already added fragment1 and fragment2 into viewpager1 and fragment1A and fragment2A into viewpager2 and if you want to just simply switch the fragments programmatically when you clicked the tabs, then you can use viewpager1.setCurrentItem(1)
viewpager1.setCurrentItem(0) in tabs' click events.

Custom Listview activity keep crashing

So I have this custom list adapter and listview thingy and I can't seem to get it to work. I've spent a couple of days now trying to figure how to fix it. Change this change that, nothing seems to work. Any idea? thanks
MainActivity.class
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.ListView;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
private static final String TAG = "MainActvty";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_inventory_actvity);
Log.d(TAG, "onCreate, Started");
ListView resList = (ListView)findViewById(R.id.inListView);
resClass wood = new resClass("Wood", 10);
resClass iron = new resClass("Iron", 50);
resClass meat = new resClass("Meat", 5);
ArrayList<resClass> resArrayList = new ArrayList<>();
resArrayList.add(wood);
resArrayList.add(iron);
resArrayList.add(meat);
ResListAdapter rsAdapter = new ResListAdapter(this, R.layout.activity_inventory_actvity, resArrayList);
resList.setAdapter(rsAdapter);
}
}
resClass.class
public class resClass {
private String resType;
private int resCount;
public resClass(String resType, int resCount) {
this.resType = resType;
this.resCount = resCount;
}
public String getResType() {
return resType;
}
public void setResType(String resType) {
this.resType = resType;
}
public int getResCount() {
return resCount;
}
public void setResCount(int resCount) {
this.resCount = resCount;
}
}
ResListAdapter.class
I'm guessing there is something wrong with the adapter. But I'm not really sure.
import android.content.Context;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;
import java.util.ArrayList;
class ResListAdapter extends ArrayAdapter<resClass>{
private static final String TAG = "ResListAdapter";
private Context mContext;
int mResource;
public ResListAdapter( Context context, int resource, ArrayList<resClass> objects) {
super(context, resource, objects);
mContext = context;
mResource = resource;
}
#NonNull
#Override
public View getView(int position, #Nullable View convertView, #NonNull ViewGroup parent) {
String resType = getItem(position).getResType();
int resCount = getItem(position).getResCount();
resClass res = new resClass(resType, resCount);
LayoutInflater rsInflater = LayoutInflater.from(mContext);
convertView = rsInflater.inflate(mResource, parent, false);
TextView resTypeView = (TextView)convertView.findViewById(R.id.res_name);
TextView resCountView = (TextView)convertView.findViewById(R.id.res_count);
resTypeView.setText(resType);
resCountView.setText(Integer.toString(resCount));
return convertView;
}
}
The xml files
MainActivity
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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="p_darkness.lonemandevelopmentstudio.com.p_darkness.MainActivity">
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:layout_editor_absoluteX="8dp"
tools:layout_editor_absoluteY="8dp"
android:id="#+id/inListView"/>
</RelativeLayout>
Custom layout for the listview
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:orientation="horizontal"
android:weightSum="100"
android:layout_height="match_parent">
<TextView
android:id="#+id/res_name"
android:textColor="#000"
android:textSize="17sp"
android:layout_width="wrap_content"
android:layout_height="60dp"
android:gravity="center"
android:layout_weight="50"
android:text="res_name"
android:textAlignment="center"/>
<TextView
android:id="#+id/res_count"
android:textColor="#000"
android:textSize="15sp"
android:textAlignment="center"
android:layout_width="wrap_content"
android:layout_height="60dp"
android:gravity="center"
android:layout_weight="50"
android:text="res_count"
/>
</LinearLayout>
It's been really frustrating guys hope I can find the solution by asking this time.

StaggeredGrid RecyclerView not showing anything

I'm trying to inflate a RecyclerView which has as StaggeredGrid Layout, but it is not showing anything. I've pretty much copied previous code I've used before for the RecyclerView so I'm kind of stumped.
In MuseumStoriesViewHolder.onCreateViewHolder() the return of holder has the following value ViewHolder{337ec22b position=-1 id=-1, oldPos=-1, pLpos:-1 unboundundefined adapter position no parent} I'm not sure if this is realated, but it was something that seemed off to me.
It also might help to know that the fragment I'm inflating this RecyclerView is a nested Fragment.
Any help would be greatly appreciated.
MuseumFragment
package com.example.android.radiobuttontestproject.fragments;
import android.app.Activity;
import android.os.Bundle;
import android.app.Fragment;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.StaggeredGridLayoutManager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.example.android.radiobuttontestproject.R;
import com.example.android.radiobuttontestproject.adapters.MuseumStoriesAdapter;
import com.example.android.radiobuttontestproject.helpers.pojo.StoryObject;
import com.example.android.radiobuttontestproject.test.SampleDataFactory;
import java.util.List;
import butterknife.Bind;
import butterknife.ButterKnife;
public class MuseumFragment extends Fragment {
private List<StoryObject> storyObjectList;
private StaggeredGridLayoutManager storyGridLayoutManager;
private MuseumStoriesAdapter storyAdapter;
#Bind(R.id.stories_recycler_view) RecyclerView storiesRecyclerView;
public static MuseumFragment newInstance() {
MuseumFragment fragment = new MuseumFragment();
Bundle args = new Bundle();
fragment.setArguments(args);
return fragment;
}
public MuseumFragment() {
// Required empty public constructor
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_museum, container, false);
ButterKnife.bind(this, view);
//Sets up the stories
SampleDataFactory sampleDataFactory = new SampleDataFactory();
storyObjectList = sampleDataFactory.getSampleStories(
getResources().getStringArray(R.array.test_titles_for_grid_museum1),
getResources().getStringArray(R.array.test_desc_for_grid_museum1));
storyGridLayoutManager = new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL);
storiesRecyclerView.setLayoutManager(storyGridLayoutManager);
storyAdapter = new MuseumStoriesAdapter(getActivity().getApplicationContext(), storyObjectList);
storiesRecyclerView.setAdapter(storyAdapter);
return view;
}
#Override
public void onAttach(Activity activity) {
super.onAttach(activity);
}
#Override
public void onDetach() {
super.onDetach();
}
}
MuseumStoriesAdapter
package com.example.android.radiobuttontestproject.adapters;
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import android.widget.Toast;
import com.example.android.radiobuttontestproject.R;
import com.example.android.radiobuttontestproject.helpers.pojo.StoryObject;
import java.util.List;
public class MuseumStoriesAdapter extends RecyclerView.Adapter<MuseumStoriesAdapter.MuseumStoriesViewHolder> {
private List<StoryObject> itemList;
private LayoutInflater inflater;
private Context context;
public MuseumStoriesAdapter(Context context, List<StoryObject> itemList) {
this.itemList = itemList;
this.context = context;
inflater = LayoutInflater.from(this.context);
}
#Override
public MuseumStoriesViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
View view = inflater.inflate(R.layout.view_box_small, viewGroup, false);
MuseumStoriesViewHolder holder = new MuseumStoriesViewHolder(view);
return holder;
}
#Override
public void onBindViewHolder(MuseumStoriesViewHolder holder, int position) {
holder.title.setText(itemList.get(position).getTitle());
holder.desc.setText(itemList.get(position).getDescription());
}
#Override
public int getItemCount() {
return itemList.size();
}
class MuseumStoriesViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
public TextView type,title,desc;
public MuseumStoriesViewHolder(View itemView) {
super(itemView);
//Tried Butterknife, but it doesn't seem like it was working in the view holder. - Peter
type = (TextView) itemView.findViewById(R.id.small_box_type);
title = (TextView) itemView.findViewById(R.id.small_box_title);
desc = (TextView) itemView.findViewById(R.id.small_box_desc);
itemView.setOnClickListener(this);
}
#Override
public void onClick(View view) {
Toast.makeText(view.getContext(), "Clicked Position = " + getPosition(), Toast.LENGTH_SHORT).show();
}
}
}
fragment_museum.xml
<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.android.radiobuttontestproject.fragments.MuseumFragment">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:weightSum="1">
<TextView
android:id="#+id/museum_header"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="#dimen/header_margin"
android:gravity="center"
android:textSize="#dimen/font_larger"
android:text="#string/museum_header" />
<android.support.v7.widget.RecyclerView
android:id="#+id/stories_recycler_view"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
</ScrollView>
view_box_small.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="#dimen/small_box_margin"
android:background="#color/small_box_background_color">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<!--TODO Make layout_height wrap contenet -->
<ImageView
android:layout_width="match_parent"
android:layout_height="120dp"
android:background="#color/test_color2"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:src="#drawable/abc_btn_rating_star_off_mtrl_alpha"
/>
</FrameLayout>
<TextView
android:id="#+id/small_box_type"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="#dimen/font_small"
android:textColor="#color/font_red"
android:text="Object"
/>
<TextView
android:id="#+id/small_box_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="#dimen/font_large"
android:textColor="#color/font_black"
android:text="Sample Text Here"
/>
<TextView
android:id="#+id/small_box_desc"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="#dimen/font_normal"
android:textColor="#color/font_black"
android:textStyle="italic"
android:text="Sample Text Here"
/>
</LinearLayout>