More about Activity Life Cycle with an example.

Hey there, Here is an example of Activity life cycle, This will illustrate more about how onCreate(), onStart(), onResume, onPause(), onStop() call in activity Life Cycle, I have Created two activity and given toast in each method, when you navigate the application Toast will pop on the screen as per Activity Life cycle.

<!-- ================First layout (main.xml)=====================-->

<?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="vertical" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello" />

    <Button
        android:id="@+id/but"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button" />

</LinearLayout>

<!-- ===================End of main.xml====================== -->


/*=========ActivityLifeCycleActivity (Corrosponding code to main.xml) ========*/
package com.hellboys.act;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
public class ActivityLifeCycleActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Toast.makeText(getBaseContext(), "1 onCreate()",Toast.LENGTH_LONG).show();
       
        Button b1;
        b1 = (Button) findViewById(R.id.but);
        b1.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
Intent intent = new Intent(ActivityLifeCycleActivity.this,abhi.class);
startActivity(intent);
}
});
    }
   
    public void onStart(){
    super.onStart();
    Toast.makeText(getBaseContext(), "1 onStart()",Toast.LENGTH_LONG).show();
    }
   
    public void onResume(){
    super.onResume();
    Toast.makeText(getBaseContext(), "1 onResume()",Toast.LENGTH_LONG).show();
    }
   
    public void onPause(){
    super.onPause();
    Toast.makeText(getBaseContext(), "1 onPause()",Toast.LENGTH_LONG).show();
    }
   
    public void onStop(){
    super.onStop();
    Toast.makeText(getBaseContext(), "1 onStop()",Toast.LENGTH_LONG).show();
    }
}
/*=============End of ActivityLifeCycleActivity=================*/

<!-- ================Second layout (abhi.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" >

    <AnalogClock
        android:id="@+id/analogClock1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</LinearLayout>
<!-- =====================End of abhi.xml======================= -->


/*=========Second Activity(Java code corresponding to abhi.xml) ========= */
package com.hellboys.act;

import android.app.Activity;
import android.os.Bundle;
import android.widget.Toast;
public class abhi extends Activity{
@Override
public void onCreate(Bundle savedInstance){
super.onCreate(savedInstance);
setContentView(R.layout.abhi);
Toast.makeText(getBaseContext(), "2 onCreate()", Toast.LENGTH_LONG).show();
}

public void onStart(){
super.onStart();
Toast.makeText(getBaseContext(), "2 start()", Toast.LENGTH_LONG).show();
}
public void onResume(){
super.onResume();
Toast.makeText(getBaseContext(), "2 onResume()", Toast.LENGTH_LONG).show();
}
public void onPause(){
super.onPause();
Toast.makeText(getBaseContext(), "2 onPause()", Toast.LENGTH_LONG).show();
}
public void onStop(){

super.onStop();
Toast.makeText(getBaseContext(), "2 onstop()", Toast.LENGTH_LONG).show();
}
}
/*=================End of abhi============================*/

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