[android-developers] Fragment Inside Fragment

Hi everyone

I need help regarding working on fragment inside fragment, actually i
am facing a problem on pressing back button. Application Main screen
has nuttons and pressing on each button view replace with new
fragment(and that fragment contain inside another fragment) ,
dynamically adding/replacing fragment is working fine, by pressing
button1 fragment replaced , same happens when pressing button, but if
i press button agian , got exception
"Duplicate id 0x7f05000a, tag null, or parent id 0x7f050009 with
another fragment for com........ fragmentname"
mean fragment or its inside fragments already added and i am trying
to add them again, anybody has idea how to work with fragment inside
fragment and moving back and forth without any problem, thanks for the
support.

code of the MainActiviy , where fragments are dynamical add and
replaced.

public class FragmentInsideFragmentTestActivity extends Activity {

private Button button1;
private Button button2;
private Button button3;
private Button button4;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

button1 =(Button) this.findViewById(R.id.button1);
button1.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
onButtonClick(view);

}
});

button2 =(Button) this.findViewById(R.id.button2);
button2.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
onButtonClick(view);

}
});

button3 =(Button) this.findViewById(R.id.button3);
button3.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
onButtonClick(view);

}
});

button4 =(Button) this.findViewById(R.id.button4);
button4.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
onButtonClick(view);

}
});

}

public void onButtonClick(View v) {
Fragment fg;
switch (v.getId()) {
case R.id.button1:
fg=FirstFragment.newInstance();
replaceFragment(fg);
break;
case R.id.button2:
fg=SecondFragment.newInstance();
replaceFragment(fg);
break;
case R.id.button3:
fg=FirstFragment.newInstance();
replaceFragment(fg);
break;
case R.id.button4:
fg=SecondFragment.newInstance();
replaceFragment(fg);
break;
}
}

private void replaceFragment(Fragment newFragment) {
// TODO Auto-generated method stub
// creating instance of the HelloWorldFragment.

FragmentTransaction trasection =
getFragmentManager().beginTransaction();
if(!newFragment.isAdded()){
try{
//FragmentTransaction trasection =
getFragmentManager().beginTransaction();
trasection.replace(R.id.linearLayout2, newFragment);
trasection.addToBackStack(null);
trasection.commit();

}catch (Exception e) {
// TODO: handle exception
//AppConstants.printLog(e.getMessage());

}
}else
trasection.show(newFragment);

}
}

Layout: main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/
android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>

<LinearLayout android:id="@+id/linearLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Button android:layout_width="wrap_content"
android:id="@+id/button1"
android:layout_height="wrap_content"
android:text="Button1"></Button>
<Button android:text="Button2"
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"></Button>
<Button android:text="Button3"
android:id="@+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"></Button>
<Button android:text="Button4"
android:id="@+id/button4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"></Button>
</LinearLayout>

<LinearLayout android:id="@+id/linearLayout2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"></LinearLayout>
</LinearLayout>

Hope i treid to clear my problem.. Please hlep becouse it tool already
to much time and pushing me behind my schedule.

Thanks alot
ijaz

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