Life Cycle of a Fragment Example
Description
Fragments have their own life cycle.
Example
The following code examines the various states experienced by a fragment.
In the res/layout folder, add a new file and name it fragment1.xml.
Populate it with the following:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout/* ww w. j a v a2 s. co m*/
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#00FF00"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="This is fragment #1"
android:textColor="#000000"
android:textSize="25sp" />
</LinearLayout>
Also in the res/layout folder, add another new file and name it fragment2.xml.
Populate it as follows:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout//from w ww . j a v a 2 s.c o m
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#FFFE00"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="This is fragment #2"
android:textColor="#000000"
android:textSize="25sp" />
</LinearLayout>
In activity_main.xml, add the following code:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal" >
/* w w w . j ava2s . c o m*/
<fragment
android:name="com.java2s.Fragments.Fragment1"
android:id="@+id/fragment1"
android:layout_weight="1"
android:layout_width="0px"
android:layout_height="match_parent" />
<fragment
android:name="com.java2s.Fragments.Fragment2"
android:id="@+id/fragment2"
android:layout_weight="1"
android:layout_width="0px"
android:layout_height="match_parent" />
</LinearLayout>
Under the com.java2s.Fragments package name, add two
Java class files and name them Fragment1.java and Fragment2.java
Add the following code to Fragment1.java:
/*from w w w . j av a2 s. c om*/
import android.app.Activity;
import android.app.Fragment;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class Fragment1 extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
Log.d("Fragment 1", "onCreateView");
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment1, container, false);
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
Log.d("Fragment 1", "onAttach");
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d("Fragment 1", "onCreate");
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
Log.d("Fragment 1", "onActivityCreated");
}
@Override
public void onStart() {
super.onStart();
Log.d("Fragment 1", "onStart");
}
@Override
public void onResume() {
super.onResume();
Log.d("Fragment 1", "onResume");
}
@Override
public void onPause() {
super.onPause();
Log.d("Fragment 1", "onPause");
}
@Override
public void onStop() {
super.onStop();
Log.d("Fragment 1", "onStop");
}
@Override
public void onDestroyView() {
super.onDestroyView();
Log.d("Fragment 1", "onDestroyView");
}
@Override
public void onDestroy() {
super.onDestroy();
Log.d("Fragment 1", "onDestroy");
}
@Override
public void onDetach() {
super.onDetach();
Log.d("Fragment 1", "onDetach");
}
}
Add the following code to Fragment2.java:
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
//from ww w .j a v a2 s. c om
public class Fragment2 extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment2, container, false);
}
}