Android

 

1. package example.javatpoint.com.activitylifecycle;  
2.   
3. import android.app.Activity;  
4. import android.os.Bundle;  
5. import android.util.Log;  
6.   
7. public class MainActivity extends Activity {  
8.   
9.     @Override  
10.     protected void onCreate(Bundle savedInstanceState) {  
11.         super.onCreate(savedInstanceState);  
12.         setContentView(R.layout.activity_main);  
13.         Log.d("lifecycle","onCreate invoked");  
14.     }  
15.     @Override  
16.     protected void onStart() {  
17.         super.onStart();  
18.         Log.d("lifecycle","onStart invoked");  
19.     }  
20.     @Override  
21.     protected void onResume() {  
22.         super.onResume();  
23.         Log.d("lifecycle","onResume invoked");  
24.     }  
25.     @Override  
26.     protected void onPause() {  
27.         super.onPause();  
28.         Log.d("lifecycle","onPause invoked");  
29.     }  
30.     @Override  
31.     protected void onStop() {  
32.         super.onStop();  
33.         Log.d("lifecycle","onStop invoked");  
34.     }  
35.     @Override  
36.     protected void onRestart() {  
37.         super.onRestart();  
38.         Log.d("lifecycle","onRestart invoked");  
39.     }  
40.     @Override  
41.     protected void onDestroy() {  
42.         super.onDestroy();  
43.         Log.d("lifecycle","onDestroy invoked");  
44.     }  
45. }  

Output:

You will not see any output on the emulator or device. You need to open logcat.

Method	Description
onCreate	called when activity is first created.
onStart	called when activity is becoming visible to the user.
onResume	called when activity will start interacting with the user.
onPause	called when activity is not visible to the user.
onStop	called when activity is no longer visible to the user.
onRestart	called after your activity is stopped, prior to start.
onDestroy	called before the activity is destroyed.