I am creating an app in which in portrait mode I have an activity that has a fragment which contains a listview and on clicking on that listview, Second activity is called to show the data using second fragment but the problem is that when second fragment, i.e. Frag2 is called its onActivityCreated() method is not getting called. Why so?
MainActivity.xml
portrait mode
<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.ankit.fragprac2.MainActivity">
<fragment
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/frag1"
android:name="com.example.ankit.fragprac2.Frag1"
/>
</LinearLayout>
landscape mode
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
android:layout_height="match_parent">
<fragment
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/frag1"
android:name="com.example.ankit.fragprac2.Frag1"
android:layout_weight="1"/>
<fragment
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/frag2"
android:name="com.example.ankit.fragprac2.Frag2"
android:layout_weight="1"/>
</LinearLayout>
MainActivity.java
public class MainActivity extends AppCompatActivity implements Frag1.Comm {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void respond(int i)
{
FragmentManager fm=getFragmentManager();
Frag2 fg2= (Frag2) fm.findFragmentById(R.id.frag2);
if(fg2!=null && fg2.isVisible())
{
fg2.setData(i);
}
else
{
Intent in=new Intent(this,SecondActivity.class);
in.putExtra("position",i);
startActivity(in);
}
}
}
Fragment1.xml
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
android:layout_height="match_parent">
<ListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/list"/>
</RelativeLayout>
Fragment1.java
public class Frag1 extends Fragment {
ListView lv;
Comm c1;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.activity_frag1,container,false);
}
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
String[] s=getResources().getStringArray(R.array.topics);
c1 = (Comm) getActivity();
lv = getActivity().findViewById(R.id.list);
lv.setAdapter(new ArrayAdapter<String>(getActivity(),android.R.layout.simple_list_item_1,s));
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
c1.respond(i);
}
});
}
interface Comm
{
void respond(int i);
}
}
Fragment2.xml
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/text1"
android:layout_centerHorizontal="true"
android:textSize="20dp"
android:textStyle="bold"
android:textColor="#000"/>
</RelativeLayout>
Fragment2.java
public class Frag2 extends Fragment {
TextView t;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.activity_frag2,container,false);
}
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
Toast.makeText(getActivity(),"OAC",Toast.LENGTH_SHORT).show();
t=getActivity().findViewById(R.id.text1);
// s1=new String[getResources().getStringArray(R.array.data).length];
// Toast.makeText(getActivity(),""+s1.length,Toast.LENGTH_SHORT).show();
if(savedInstanceState!=null)
{
String s=savedInstanceState.getString("data",null);
t.setText(s);
}
}
public void setData(int i)
{ String[] s1 =getResources().getStringArray(R.array.data);
t.setText(s1[i]);
}
@Override
public void onSaveInstanceState(Bundle outState) {
outState.putString("data",t.getText().toString());
}
}
SecondActivity.xml
<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="com.example.ankit.fragprac2.SecondActivity">
<fragment
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/frag21"
android:name="com.example.ankit.fragprac2.Frag2"/>
</RelativeLayout>
SecondActivity.java
public class SecondActivity extends AppCompatActivity {
int i;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
Bundle b= getIntent().getExtras();
if(b!=null)
{
i= b.getInt("position",0);
}
FragmentManager fm=getFragmentManager();
Frag2 fga2= (Frag2) fm.findFragmentById(R.id.frag21);
fga2.setData(i);
}
}
