My Life with Android
Introduction Android Componets UserInterface Advanced UI Data Storage Advanced Concepts Others New Studio

Android Fragments

  • Android Fragment is the part of activity, it is also known as sub-activity. There can be more than one fragment in an activity. Fragments represent multiple screen inside one activity.
  • Android fragment lifecycle is affected by activity lifecycle because fragments are included in activity.
  • Each fragment has its own life cycle methods that is affected by activity life cycle because fragments are embedded in activity.
  • The FragmentManager class is responsible to make interaction between fragment objects.

Android Fragment Example

File: activity_main.xml 

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
    android:layout_width="fill_parent"  
    android:layout_height="fill_parent" >  
  
    <fragment  
        android:id="@+id/fragment2"  
        android:name="com.example.fragmentexample.Fragment2"  
        android:layout_width="0px"  
        android:layout_height="match_parent"   
        android:layout_weight="1"  
        />  
  
    <fragment  
        android:id="@+id/fragment1"  
        android:name="com.example.fragmentexample.Fragment1"  
        android:layout_width="0px"  
        android:layout_height="match_parent"  
        android:layout_weight="1"  
         />  
  
</LinearLayout>
File: fragment1.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:background="#00ff00"  
     >  
  
    <TextView  
        android:id="@+id/textView1"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:text="fragment frist"  
        android:textAppearance="?android:attr/textAppearanceLarge" />  
  
</LinearLayout>
File: fragment2.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:background="#0000ff"  
     >  
  
    <TextView  
        android:id="@+id/textView1"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:text="Second Fragment"  
        android:textAppearance="?android:attr/textAppearanceLarge" />  
  
</LinearLayout>
File: MainActivity.java 

import android.os.Bundle;  
import android.app.Activity;  
import android.view.Menu;  
public class MainActivity extends Activity {  
  
    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.activity_main);  
    }  
}
File: Fragment1.java 

import android.app.Fragment;  
import android.os.Bundle;  
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) {  
        // TODO Auto-generated method stub  
        return inflater.inflate(R.layout.fragment1,container, false);  
    }  
  
}
File: Fragment2.java 

import android.app.Fragment;  
import android.os.Bundle;  
import android.view.LayoutInflater;  
import android.view.View;  
import android.view.ViewGroup;  
  
public class Fragment2 extends Fragment {  
      
    public View onCreateView(LayoutInflater inflater, ViewGroup container,  
            Bundle savedInstanceState) {  
        // TODO Auto-generated method stub  
        return inflater.inflate(R.layout.fragment2,container, false);  
    }  
  
}
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