Develop Reference

ANDROID fragment is not able to add or replace with new fragment

i have tried the all the suggestions for this. All that answers are changing the fragment from a activity but here is the difference in my question. i am trying to change one fragment to another fragment from the first fragment.Please help me .
i have a fragment which contains dynamic buttons.please find the image [![enter image description here][1]][1]
If the user clicks any of the button i want to show some stack cars for the same.see the image [![enter image description here][2]][2]
Ok this is my requirement. My problem is i have one activity which contains the bottom navigation bar names as ShowDashBoardActivity
ShowDashBoardActivity.java
import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.LinearLayout;
import android.widget.Toast;
import com.yourname.R;
import com.yourname.fragments.DashBoardJobList;
import com.yourname.fragments.DashBoardOne;
import com.yourname.fragments.DashBoardTaskBubble;
import com.roughike.bottombar.BottomBar;
import com.roughike.bottombar.BottomBarBadge;
import com.roughike.bottombar.BottomBarFragment;
import butterknife.Bind;
public class ShowDashBoardActivity extends AppCompatActivity {
private BottomBar bottomBar;
LinearLayout CardAspirationLayout,TextCardAspirationLayout;
DashBoardOne _DashBoardOne;
Context context;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.show_dash_board_activity);
context=getApplicationContext();
getSupportActionBar().setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
getSupportActionBar().setDisplayShowCustomEnabled(true);
getSupportActionBar().setCustomView(R.layout.custom_action_bar_layout);
View view =getSupportActionBar().getCustomView();
/*ImageButton imageButton= (ImageButton)view.findViewById(R.id.action_bar_back);
imageButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
finish();
}
});*/
bottomBar = BottomBar.attach(this, savedInstanceState);
bottomBar.setFragmentItems(getSupportFragmentManager(), R.id.fragmentContainer,
new BottomBarFragment(DashBoardOne.newInstance("Content for Dashboard."), R.drawable.dashboard, "Dashboard"),
new BottomBarFragment(DashBoardTaskBubble.newInstance("Content for Task."), R.drawable.task, "Task"),
new BottomBarFragment(DashBoardJobList.newInstance("Content for Job."), R.drawable.job, "Job")
);
TextCardAspirationLayout=(LinearLayout) findViewById(R.id.TextCardAspirationLayout);
bottomBar.setActiveTabColor("#C2185B");
BottomBarBadge unreadMessages = bottomBar.makeBadgeForTabAt(2, "#E91E63", 4);
unreadMessages.show();
unreadMessages.setAnimationDuration(200);
unreadMessages.setAutoShowAfterUnSelection(true);
// bottomBar.useDarkTheme(true);
}
}
show_dash_board_activity.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/fragmentContainer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/slidetwo"
xmlns:tools="http://schemas.android.com/tools" >
</FrameLayout>
The navigation drawer is working perfect. the in the DashBoardTaskBubble.java it is fragment i am drawing dynamic bubble to show like picture 1.
DashBoardTaskBubble.java
import android.content.res.ColorStateList;
import android.graphics.Color;
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.view.ViewCompat;
import android.support.v7.widget.AppCompatButton;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewTreeObserver;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;
import com.panenviron.R;
import java.util.ArrayList;
import java.util.List;
import static android.R.attr.tint;
public class DashBoardTaskBubble extends Fragment {
private static final String STARTING_TEXT = "Four Buttons Bottom Navigation";
public DashBoardTaskBubble() {
}
public static DashBoardTaskBubble newInstance(String text) {
Bundle args = new Bundle();
args.putString(STARTING_TEXT, text);
DashBoardTaskBubble dashBoardTaskBubble = new DashBoardTaskBubble();
dashBoardTaskBubble.setArguments(args);
return dashBoardTaskBubble;
}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_task_bubble, container, false);
final RelativeLayout workViewLayout = (RelativeLayout)view.findViewById(R.id.workView);
int iNumberOfButtons = 6; // no of bubble create function to fetch no of bubble from db
// create a function to get color from db now give static
String[] colourList = new String[] { "#ffaa00","#32CD32","#0000FF"};
Button[] dynamicButtons = new Button[iNumberOfButtons];
List<String> tempColouersList= new ArrayList<String>();
for (int i = 0; i < iNumberOfButtons; i++) {
dynamicButtons[i] = new Button(getActivity());
dynamicButtons[i].setText("+"+i+5);
dynamicButtons[i].setId(i);
dynamicButtons[i].setTextSize(15.0f);
dynamicButtons[i].setBackgroundResource(R.drawable.round_button);
if(i==0){
RelativeLayout.LayoutParams paramsButton =
new RelativeLayout.LayoutParams(350,350);
paramsButton.setMargins(50,0,0,0);
dynamicButtons[0].setLayoutParams(paramsButton);
tempColouersList.add(colourList[0]);
} else if(i==1){
RelativeLayout.LayoutParams paramsButton2 =
new RelativeLayout.LayoutParams(350,350);
paramsButton2.setMargins(700,10,0,0);
dynamicButtons[1].setLayoutParams(paramsButton2);
tempColouersList.add(colourList[1]);
} else if(i==2){
RelativeLayout.LayoutParams paramsButton3 =
new RelativeLayout.LayoutParams(350,350);
paramsButton3.setMargins(400,250,0,0);
dynamicButtons[2].setLayoutParams(paramsButton3);
tempColouersList.add(colourList[2]);
} else if(i==3){
RelativeLayout.LayoutParams paramsButton4 =
new RelativeLayout.LayoutParams(350,350);
paramsButton4.setMargins(50,450,0,0);
dynamicButtons[3].setLayoutParams(paramsButton4);
tempColouersList.add(colourList[1]);
} else if(i==4){
RelativeLayout.LayoutParams paramsButton5 =
new RelativeLayout.LayoutParams(350,350);
paramsButton5.setMargins(700,500,0,0);
dynamicButtons[4].setLayoutParams(paramsButton5);
tempColouersList.add(colourList[2]);
}else if(i==5){
RelativeLayout.LayoutParams paramsButton6 =
new RelativeLayout.LayoutParams(350,350);
paramsButton6.setMargins(350,700,0,0);
dynamicButtons[5].setLayoutParams(paramsButton6);
tempColouersList.add(colourList[0]);
}
ColorStateList tint = new ColorStateList(new int[][]{new int[0]}, new int[]{Color.parseColor(tempColouersList.get(i)) });
if (Build.VERSION.SDK_INT == Build.VERSION_CODES.LOLLIPOP && dynamicButtons[i] instanceof AppCompatButton) {
((AppCompatButton) dynamicButtons[i]).setSupportBackgroundTintList(tint);
} else {
ViewCompat.setBackgroundTintList(dynamicButtons[i], tint);
}
dynamicButtons[i].setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
try {
Log.e("im on","button clik");
} catch (Exception e) {
e.printStackTrace();
}
}
});
workViewLayout.addView(dynamicButtons[i]); // dynamicButtonsLinearLayout is the container of the buttons
}
return view;
}
public void replaceFragments( ) {
Log.e("im on","replaceFragments");
//Fragment fragment = null;
try {
//fragment = (Fragment) TaskCardListShow.newInstance();
/*TaskCardListShow nextFrag= new TaskCardListShow();
this.getFragmentManager().beginTransaction()
.replace(R.id.fragmentContainer, nextFrag)
.addToBackStack(null)
.commit();*/
FragmentManager mFragmentManager = getFragmentManager();
FragmentTransaction mFragmentTransaction = https://i.stack.imgur.com/J75iJ.pngmFragmentManager.beginTransaction();
TaskCardListShow mFragment = new TaskCardListShow();
//mFragmentTransaction.replace(R.id.fragmentContainer, mFragment);
mFragmentTransaction.add(R.id.fragmentContainer, mFragment);
mFragmentTransaction.addToBackStack(null);
mFragmentTransaction.commit();
} catch (Exception e)
{ e.printStackTrace(); }
// Insert the fragment by replacing any existing fragment FragmentManager
// fragmentManager = getSupportFragmentManager();
// fragmentManager.beginTransaction().replace(R.id.flContent, fragment).commit();
}
}
fragment_task_bubble.xml
<LinearLayout 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"
android:gravity="center_horizontal"
android:orientation="vertical"
android:background="#drawable/slidetwo">
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="12"
android:background="#color/white">
</LinearLayout>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="88"
android:orientation="vertical"
android:background="#color/white">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:layout_marginTop="3dp"
/>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="5dp"
android:layout_gravity="center_horizontal"
android:layout_marginBottom="20dp">
<View
android:layout_width="98dp"
android:gravity="center_horizontal"
android:layout_height="4dp"
android:background="#android:color/holo_red_dark"
android:id="#+id/normalViewSeparator"
/>
</LinearLayout>
<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="wrap_content"
android:layout_weight="30"
android:orientation="vertical"
android:id="#+id/workView"
android:background="#color/white">
</RelativeLayout>
</LinearLayout>
</LinearLayout>
The bubble drawing is also working perfect. Here i trying to add some features like if a user clicks a button i want to show the stack cards like picture 2
I am thinking to display the task cards in fragment . I dont know how to navigate one fragment to another fragment.
TaskCardListShow.java FRAGMENT
package com.panenviron.fragments;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import com.panenviron.R;
public class TaskCardListShow extends Fragment {
public TaskCardListShow() {
}
public static TaskCardListShow newInstance() {
TaskCardListShow _TaskCardListShow = new TaskCardListShow();
return _TaskCardListShow;
}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.task_card_list_show, container, false);
Log.e("im on","TaskCardListShow");
return view;
}
}
task_card_list_show.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:id="#+id/fragment_task_card_list_show"
style="#style/Animation.AppCompat.Dialog">
<TextView
android:text="Im on task fragment"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/textView"
android:layout_weight="1" />
</LinearLayout>
i tried the above replaceFragments( ) custom function. But it is replaces the fragment but it is not removing the first fragment. How can do this.

Your are using support fragments (android.support.v4.app.Fragment) with native fragmentmanager - Activity.getFragmentManager(). Instead you have to use support fragmentmanager - AppCompatActivity.getSupportFragmentManager().
I really wish android tools would handle this annoying situation better.

inside the fragment you have to call getActivity().getSupportFragmentManager() instead of getFragmentManager. so you have to give like this "getActivity().getSupportFragmentManager().beginTransaction()" in the fragment transaction. after that you can replace simply like already done

BottomBar fragments in Android studio

How can I add fragments for each tab in BottomBar in Android studio please a good example like list view or grid view for each tab..thanks

You need to implement SetOnTabSelectListerner.
bottomBar.setOnTabSelectListener(new OnTabSelectListener() {
#Override
public void onTabSelected(#IdRes int tabId) {
Fragment fragment = null;
Class fragmentClass = null;
switch (tabId) {
case R.id.tab_one:
fragmentClass = TabOneFragment.class;
break;
case R.id.tab_two:
fragmentClass = TabTwoFragment.class;
break;
case R.id.tab_three:
fragmentClass = TabThreeFragment.class;
break;
case R.id.tab_four:
fragmentClass = TabFourFragment.class;
break;
}
try {
fragment = (Fragment) fragmentClass.newInstance();
} catch (Exception e) {
e.printStackTrace();
}
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction().replace(R.id.flContent, fragment).commit();
}
});

main_activity.java
import android.app.Activity;
import android.app.FragmentManager;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
public class MainActivity extends FragmentActivity implements communicator{
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
#Override
public void respond(int i) {
android.support.v4.app.FragmentManager fm=getSupportFragmentManager();
FragmentB f2= (FragmentB)fm.findFragmentById(R.id.fragment2);
f2.changedata(i);
}
}
main_activity.xml
<?xml version="1.0" encoding="utf-8"?>
<android.widget.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:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#00BBFF"
android:orientation="vertical"
tools:context="com.example.dhanya.myfragmentexample.MainActivity">
<fragment
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/fragment"
android:name="com.example.dhanya.myfragmentexample.FragmentA"
/>
<fragment
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/fragment2"
android:name="com.example.dhanya.myfragmentexample.FragmentB"
/>
</android.widget.LinearLayout>
fragmentA.java
package com.example.dhanya.myfragmentexample;
import android.content.Context;
import android.net.Uri;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
public class FragmentA extends Fragment implements AdapterView.OnItemClickListener{
ListView list;
communicator comm;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_, container, false);
}
#Override
public void onActivityCreated(#Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
comm= (communicator) getActivity();
list=(ListView)getActivity().findViewById(R.id.lv);
ArrayAdapter ad=ArrayAdapter.createFromResource(getActivity(),R.array.listval,android.R.layout.simple_list_item_1);
list.setAdapter(ad);
list.setOnItemClickListener(this);
}
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
TextView txt=(TextView)view;
String str=txt.getText().toString();
comm.respond(position);
}
}
fragmentA.xml
<FrameLayout 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.dhanya.myfragmentexample.FragmentA"
android:background="#FFBB00">
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/lv"/>
</FrameLayout>
fragmentB.java
package com.example.dhanya.myfragmentexample;
import android.content.Context;
import android.content.res.Resources;
import android.net.Uri;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class FragmentB extends Fragment {
TextView txt;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_fragment_b, container, false);
}
#Override
public void onActivityCreated(#Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
txt=(TextView)getActivity().findViewById(R.id.textv);
}
public void changedata(int i)
{
Resources res=getResources();
String[] des=res.getStringArray(R.array.desciptions);
// String str=Integer.toString(i);
txt.setText(des[i]);
// txt.setText(str); }}
fragmentB.xml
<FrameLayout 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.dhanya.myfragmentexample.FragmentB"
android:background="#99CC00"
>
<!-- TODO: Update blank fragment layout -->
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/textv"/>
</FrameLayout>
strings.xml
<resources>
<string name="app_name">MyFragmentExample</string>
<!-- TODO: Remove or change this placeholder text -->
<string name="hello_blank_fragment">Hello blank fragment</string>
<string-array name="listval">
<item>fragments</item>
<item>Activities</item>
<item>Services</item>
<item>Content Providers</item>
</string-array>
<string-array name="desciptions">
<item>A Fragment represents a behavior or a portion of user interface in an Activity. You can combine multiple fragments in a single activity to build a multi-pane UI and reuse a fragment in multiple activities. You can think of a fragment as a modular section of an activity, which has its own lifecycle, receives its own input events, and which you can add or remove while the activity is running (sort of like a "sub activity" that you can reuse in different activities).</item>
<item>Activities are one of the fundamental building blocks of apps on the Android platform. They serve as the entry point for a user's interaction with an app, and are also central to how a user navigates within an app (as with the Back button) or between apps (as with the Recents button). </item>
<item>A Service is an application component that can perform long-running operations in the background, and it does not provide a user interface. Another application component can start a service, and it continues to run in the background even if the user switches to another application. Additionally, a component can bind to a service to interact with it and even perform interprocess communication (IPC). For example, a service can handle network transactions, play music, perform file I/O, or interact with a content provider, all from the background.</item>
<item>Content providers can help an application manage access to data stored by itself, stored by other apps, and provide a way to share data with other apps. They encapsulate the data, and provide mechanisms for defining data security. Content providers are the standard interface that connects data in one process with code running in another process. Implementing a content provider has many advantages. </item>
</string-array>
</resources>
communicator.java
public interface communicator {
public void respond(int i);
}

//Grid view
main_activity.xml
<ScrollView xmlns:tools="http://schemas.android.com/tools"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<GridView
android:id="#+id/gridview1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:columnWidth="50dp"
android:gravity="center"
android:numColumns="auto_fit"
android:stretchMode="columnWidth" >
</GridView>
</RelativeLayout>
</ScrollView>
mainactivity.java
package com.example.harish.mylayoutexamples;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.GridView;
import android.widget.TextView;
import android.widget.Toast;
public class GridActivity extends AppCompatActivity implements AdapterView.OnItemClickListener{
GridView gridView;
static final String[] numbers = new String[] {
"A", "B", "C", "D", "E",
"F", "G", "H", "I", "J",
"K", "L", "M", "N", "O",
"P", "Q", "R", "S", "T",
"U", "V", "W", "X", "Y", "Z"
};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_grid);
gridView = (GridView) findViewById(R.id.gridview1);
// Create adapter to set value for grid view
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, numbers);
gridView.setAdapter(adapter);
gridView.setOnItemClickListener(this);
/* gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View v,
int position, long id) {
Toast.makeText(getApplicationContext(),
((TextView) v).getText() , Toast.LENGTH_SHORT).show();
}
});*/
}
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(getApplicationContext(),
((TextView) view).getText() , Toast.LENGTH_SHORT).show();
}
}

fragments dynamic loading
Main activity. Java
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
public class MainActivity extends AppCompatActivity {
Button firstFragment, secondFragment;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// get the reference of Button's
firstFragment = (Button) findViewById(R.id.firstFragment);
secondFragment = (Button) findViewById(R.id.secondFragment);
// perform setOnClickListener event on First Button
firstFragment.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// load First Fragment
loadFragment(new FirstFragment());
}
});
// perform setOnClickListener event on Second Button
secondFragment.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// load Second Fragment
loadFragment(new SecondFragment());
}
});
}
private void loadFragment(Fragment fragment) {
// create a FragmentManager
FragmentManager fm = getFragmentManager();
// android.support.v4.app.FragmentManager fm=getSupportFragmentManager();
// create a FragmentTransaction to begin the transaction and replace the Fragment
FragmentTransaction fragmentTransaction = fm.beginTransaction();
// replace the FrameLayout with new Fragment
fragmentTransaction.replace(R.id.frameLayout, fragment);
//fragmentTransaction.add(R.id.firstFragment,fragment);
fragmentTransaction.commit(); // save the changes
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
MAIN_ACTIVTY.XML
<LinearLayout 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"
android:orientation="vertical"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context=".MainActivity">
<!-- display two Button's and a FrameLayout to replace the Fragment's -->
<Button
android:id="#+id/firstFragment"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/button_background_color"
android:text="First Fragment"
android:textColor="#color/white"
android:textSize="20sp" />
<Button
android:id="#+id/secondFragment"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:background="#color/button_background_color"
android:text="Second Fragment"
android:textColor="#color/white"
android:textSize="20sp" />
<FrameLayout
android:id="#+id/frameLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="10dp" />
</LinearLayout>
FIRST_FRAGMENT.JAVA
package com.abhiandroid.fragmentexample;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.Toast;
public class FirstFragment extends Fragment {
View view;
Button firstButton;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
view = inflater.inflate(R.layout.fragment_first, container, false);
// get the reference of Button
firstButton = (Button) view.findViewById(R.id.firstButton);
// perform setOnClickListener on first Button
firstButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// display a message by using a Toast
Toast.makeText(getActivity(), "First Fragment", Toast.LENGTH_LONG).show();
}
});
return view;
}
}
FIRST_FRAGMENT>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="com.abhiandroid.fragmentexample.FirstFragment">
<!--TextView and Button displayed in First Fragment -->
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="100dp"
android:text="This is First Fragment"
android:textColor="#color/black"
android:textSize="25sp" />
<Button
android:id="#+id/firstButton"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:background="#color/green"
android:text="First Fragment"
android:textColor="#color/white"
android:textSize="20sp"
android:textStyle="bold" />
</RelativeLayout>
SECOND_FRAGMENT>JAVA
package com.abhiandroid.fragmentexample;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.Toast;
public class SecondFragment extends Fragment {
View view;
Button secondButton;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
view = inflater.inflate(R.layout.fragment_second, container, false);
// get the reference of Button
secondButton = (Button) view.findViewById(R.id.secondButton);
// perform setOnClickListener on second Button
secondButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// display a message by using a Toast
Toast.makeText(getActivity(), "Second Fragment", Toast.LENGTH_LONG).show();
}
});
return view;
}
}
SECOND_FRAGMENT>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="com.abhiandroid.fragmentexample.SecondFragment">
<!--TextView and Button displayed in Second Fragment -->
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="100dp"
android:text="This is Second Fragment"
android:textColor="#color/black"
android:textSize="25sp" />
<Button
android:id="#+id/secondButton"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:background="#color/green"
android:text="Second Fragment"
android:textColor="#color/white"
android:textSize="20sp"
android:textStyle="bold" />
</RelativeLayout>

main_activity.java
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
public class MainActivity extends AppCompatActivity implements communicator {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
#Override
public void respond(String i) {
android.support.v4.app.FragmentManager fm=getSupportFragmentManager();
FragmentB f2= (FragmentB)fm.findFragmentById(R.id.fragment2);
f2.changedata(i);
}
}
main_activity.xml
<?xml version="1.0" encoding="utf-8"?>
<android.widget.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:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.dhanya.myfragmentcommsimple.MainActivity"
android:orientation="vertical">
<fragment
android:layout_width="match_parent"
android:layout_height="250dp"
android:id="#+id/fragment"
android:name="com.example.dhanya.myfragmentcommsimple.FragmentA">
</fragment>
<fragment
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/fragment2"
android:name="com.example.dhanya.myfragmentcommsimple.FragmentB">
</fragment>
</android.widget.LinearLayout>
fragment_A.java
package com.example.dhanya.myfragmentcommsimple;
import android.content.Context;
import android.net.Uri;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ListView;
public class FragmentA extends Fragment implements View.OnClickListener{
int count=0;
Button bt;
communicator comm;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_, container, false);
}
#Override
public void onActivityCreated(#Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
comm= (communicator) getActivity();
bt=(Button)getActivity().findViewById(R.id.btn);
bt.setOnClickListener(this);
}
#Override
public void onClick(View v) {
count++;
comm.respond("The button is clicked "+ count+" times");
}
}
FRAGMET_A.xml
<FrameLayout 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.dhanya.myfragmentcommsimple.FragmentA"
android:background="#99FF00">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/btn"
android:text="counter"
android:layout_margin="40dp"/>
</FrameLayout>
FRAGMENT_B.java
package com.example.dhanya.myfragmentcommsimple;
import android.content.Context;
import android.content.res.Resources;
import android.net.Uri;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class FragmentB extends Fragment {
TextView txt;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_fragment_b, container, false);
}
#Override
public void onActivityCreated(#Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
txt=(TextView)getActivity().findViewById(R.id.tv);
}
public void changedata(String i)
{
txt.setText(i);
}
}
FRAGMENT_B.xml
<FrameLayout 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.dhanya.myfragmentcommsimple.FragmentB"
android:background="#FFBB00">
<!-- TODO: Update blank fragment layout -->
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="haiiii"
android:id="#+id/tv"
android:layout_margin="50dp"/>
</FrameLayout>
COMMUNICATOR.java
package com.example.dhanya.myfragmentcommsimple;
public interface communicator {
public void respond(String i);
}

Android Spinner on activity other than starting activity

I'm having a bit of an issue, I'm working on a android app that requires a spinner to update a string to your spinner selection, I have it all working and everything, the problem is that I need the spinner on another activity than the starting activity but when I start the app with a different activity than the one with the spinner and activate the array adapter and listener at the same time I switch views to the one with the spinner, the spinner is empty with no choices. I can't for the life of me figure this out. PS, sorry about the weird variable names I get bored and instead of making a proper name I think of something on the spot and come back and change it later. PPS The name of the content view with the spinner is orderpage and the one I want to have start with the app is activity_main PPPS I cut out some methods I deemed irrelevant so there are some variables not used. I attached my code below:
package com.NIQUOLI.Deliveryapp;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import com.NIQUOLI.Deliveryapp.GMailSender;
import android.R.string;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.os.Debug;
import android.os.StrictMode;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.Toast;
public class MainActivity extends Activity {
public static boolean deeznuts = false;
public static String storenamestring;
public static String namesame;
public static String instructionsame;
public int choice = 0;
private Spinner spinner1;
private Button button = null;
String[] stores;
Spinner sp;
public void cont(View View){
deeznuts = true;
setContentView(R.layout.orderpage);
}
#Override
protected void onCreate(Bundle savedInstanceState) {
setContentView(R.layout.orderpage);
button = (Button) findViewById(R.id.send_email);
super.onCreate(savedInstanceState);
sp = (Spinner) findViewById(R.id.sp);
stores = getResources().getStringArray(R.array.stores);
if (deeznuts = true){
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item,stores);
sp.setAdapter(adapter);
sp.setOnItemSelectedListener(new OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
// TODO Auto-generated method stub
int index = arg0.getSelectedItemPosition();
Toast.makeText(getBaseContext(), "You selected"+stores[index], Toast.LENGTH_LONG).show();
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});
}
}
public void onItemSelected(AdapterView<?> parent, View view,
int pos, long id) {
parent.getItemAtPosition(pos);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
and of course my XML with the s[ommer:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
android:orientation="vertical"
tools:context="com.NIQUOLI.Deliveryapp.SendMailTask" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:gravity="center"
android:text="#string/order_page"
android:textAppearance="?android:attr/textAppearanceLarge" />
<Space
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<EditText
android:id="#+id/name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10"
android:gravity="center_horizontal"
android:hint="#string/enter_your_name"
android:inputType="text" >
<requestFocus />
</EditText>
<Spinner
android:id="#+id/sp"
android:layout_width="388dp"
android:layout_height="wrap_content" />
<EditText
android:id="#+id/instructions"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.34"
android:ems="10"
android:inputType="textMultiLine" />
<Button
android:id="#+id/send_email"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="onClick"
android:text="#string/send_order" />
</LinearLayout>

On the 6th line of the onCreate method in the first code sample, if(deeznuts = true) should be if(deeznuts == true).

How do you change the text color of the list view

OK so the trick that works with a textView doesn't work with this.
So I know this has got to be simple.... Right?
because i might help me out with adding pictures for this later.
<?xml version="1.0" encoding="utf-8"?>
<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"
android:background="#drawable/logo"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
>
<ListView
android:id="#android:id/list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/textView1"
android:layout_alignParentBottom="true"
android:layout_below="#+id/textView1"
android:paddingLeft="8dp"
android:paddingRight="8dp" >
</ListView>
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:text="#string/welcome"
android:textColor="#b70000"
android:textSize="16sp" />
</RelativeLayout>
I use this to call it and add to the listview inside the java code.
package com.example.boonehallfrightnightsapp;
import android.os.Bundle;
import android.view.Menu;
import android.app.ListActivity;
import android.content.Intent;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
public class MainActivity extends ListActivity
{
static final String[] CHOICES = new String[]
{
"Haunted House",
"Amy's Nightmare",
"Zombie Town",
"Haunted Hayride",
"Quit"
};
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.fn_main);
//found this part on an example
//Set up ArrayAdaptor for the options
setListAdapter(new ArrayAdapter<String>
(this, android.R.layout.simple_list_item_1, CHOICES));
getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
getListView().setTextFilterEnabled(true);
//part of example
//Set up the listener for user clicks on the list
setListClickListener();
//this toast is for when it opens
Toast.makeText(this, "I see your fear...", Toast.LENGTH_SHORT).show();
}
#Override
public boolean onCreateOptionsMenu(Menu menu)
{
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
private void setListClickListener()
{
//Set up the click listener for the options
getListView().setOnItemClickListener
(
new OnItemClickListener()
{
//#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3)
{
switch(arg2)
{
case 0: launchHousePage();
break;
case 1: launchNightmarePage();
break;
case 2: launchZombiePage();
break;
case 3: launchHayridePage();
break;
case 4: finish();
break;
default: break;
}
}
}//END OnItemClickListener
);//END setOnItemClickListener
}//END setListClickListener
//goes to haunted house
protected void launchHousePage()
{
//Set up Intent
Intent launchHouse = new Intent(this, HauntedHouseList.class);
startActivity(launchHouse);
}//END launchHousePage
//goes to Amy's Nightmare
protected void launchNightmarePage()
{
//Set up Intent
Intent launchnightmare = new Intent(this, NightmareList.class);
startActivity(launchnightmare);
}//END launchNightmarePage
//goes to Amy's Nightmare
protected void launchZombiePage()
{
//Set up Intent
Intent launchzombies = new Intent(this, ZombieTownList.class);
startActivity(launchzombies);
}//END launchZombiePage
//goes to haunted house
protected void launchHayridePage()
{
//Set up Intent
Intent launchhayride = new Intent(this, HauntedHayrideList.class);
startActivity(launchhayride);
}//END launchHayridePage
}

You've specified a built-in Adapter (ArrayAdapter) using item layout android.R.layout.simple_list_item_1.
if you want custom layout, you can copy the simple_list_item_1.xml layout from Android SDK (look in the platforms/android-18/data/res/layout folder) into your project and modify it. For example you call it my_simple_list_item_1.xml.
Then modify your code to use your layout, and not android.R.layout.simple_list_item_1:
setListAdapter(new ArrayAdapter<String>(this, R.layout.my_simple_list_item_1, CHOICES));
You'll see that Androids simple_list_item_1 layout is just a TextView, and you can add the textColor attribute to it and modify to your liking.

findViewById() is returning unable to find symbol, but the ID is defined in the layout?

I'm working on learning some Android app development by myself and I'm following a video tutorial on how to make a simple ToDo list application. However, I hit a compile error and from what limited knowledge I have, everything seems to be in order. Below is both the main class and the layout:
Main.java:
http://pastebin.com/vfuANx0p
package com.example.exampletodo;
import android.R;
import android.os.Bundle;
import android.app.Activity;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnKeyListener;
import android.widget.EditText;
import android.widget.Button;
import android.widget.ListView;
import java.util.ArrayList;
import android.widget.ArrayAdapter;
public class Main extends Activity implements OnClickListener, OnKeyListener {
EditText txtItem;
Button btnAdd;
ListView listItems;
ArrayList<String> toDoItems;
ArrayAdapter<String> aa;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
txtItem = (EditText)findViewById(R.id.txtItem);
btnAdd = (Button)findViewById(R.id.btnAdd);
listItems = (ListView)findViewById(R.id.listItems);
btnAdd.setOnClickListener(this);
txtItem.setOnKeyListener(this);
toDoItems = new ArrayList<String>();
aa = new ArrayAdapter<String>(this, R.layout.simple_list_item_1, toDoItems);
listItems.setAdapter(aa);
}
private void addItem(String item){
if(item.length() > 0){
this.toDoItems.add(item);
this.aa.notifyDataSetChanged();
this.txtItem.setText("");
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public void onClick(View v){
if(v == this.btnAdd){
this.addItem(this.txtItem.getText().toString());
}
}
public boolean onKey(View v, int keyCode, KeyEvent event){
if(event.getAction() == KeyEvent.ACTION_DOWN && keyCode == KeyEvent.KEYCODE_DPAD_CENTER){
this.addItem(this.txtItem.getText().toString());
}
return false;
}
}
main.xml:
http://pastebin.com/WcWg692v
<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"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin"
tools:context=".Main">
<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/txtItem" android:layout_alignParentTop="true"
android:layout_alignParentRight="true" android:layout_alignParentLeft="true" android:focusable="true"/>
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#string/add"
android:id="#+id/btnAdd" android:layout_below="#+id/txtItem" android:layout_alignRight="#+id/txtItem"
android:layout_alignLeft="#+id/txtItem"/>
<ListView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/listItems"
android:layout_alignParentRight="true" android:layout_alignParentLeft="true"
android:layout_alignParentBottom="true" android:layout_below="#+id/btnAdd"/>
</RelativeLayout>
The error is:
/home/rohan/ExampleToDo/ExampleToDo/src/main/java/com/example/exampletodo/Main.java
Gradle: cannot find symbol variable main Gradle: cannot find symbol
variable txtItem Gradle: cannot find symbol variable btnAdd Gradle:
cannot find symbol variable listItems Gradle: cannot find symbol
variable main
Thank you so much to anyone who is willing to help!

You import wrong R file, you import android.R and you should import your package.R
com.example.exampletodo.R
EDIT: And don't forget clean and build is sometimes a must. So better do it your self than count on automatic R creation. And you can always check your R file whether it contains your ID-s.
part 2:
change this
ArrayAdapter<String>(this, R.layout.simple_list_item_1, toDoItems);
into
ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, toDoItems);
because simple_list_item_1 is part of android.R not your R
Hope this helps and enjoy your work.