Android Activity生命週期 OnPause() -> OnStop(). OnReStart() -> OnStart() -> OnResume().onDestroy().OnCreate()

通過這個練習知道, 原來按下HOME按鈕離開應用程式, 和按下BACK按鈕或調用finish()方法離開應用程式是不相同的.

按下HOME按鈕離開應用程式, 會順序調用: OnPause() -> OnStop().
再次進入應用程式會調用: OnReStart() -> OnStart() -> OnResume().

按下BACK按鈕或調用finish()方法離開應用程式: OnPause() -> OnStop() -> onDestroy().
再次進入應用程式會調用: OnCreate() -> OnStart() -> OnResume().







package com.AndroidLifeCycle;

 

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.Toast;

 

public class AndroidLifeCycle extends Activity {

   /** Called when the activity is first created. */

   @Override

   public void onCreate(Bundle savedInstanceState) {

       super.onCreate(savedInstanceState);

       setContentView(R.layout.main);

       

       Button finish = (Button)findViewById(R.id.finish);

       finish.setOnClickListener(new Button.OnClickListener(){

 

   @Override

   public void onClick(View v) {

    // TODO Auto-generated method stub

    finish();

   }});

       

       Toast.makeText(this, "onCreate", Toast.LENGTH_LONG).show();

       

   }

 

 @Override

 protected void onDestroy() {

  // TODO Auto-generated method stub

  super.onDestroy();

  Toast.makeText(this, "onDestroy", Toast.LENGTH_LONG).show();

 }

 

 @Override

 protected void onPause() {

  // TODO Auto-generated method stub

  super.onPause();

  Toast.makeText(this, "onPause", Toast.LENGTH_LONG).show();

 }

 

 @Override

 protected void onRestart() {

  // TODO Auto-generated method stub

  super.onRestart();

  Toast.makeText(this, "onRestart", Toast.LENGTH_LONG).show();

 }

 

 @Override

 protected void onResume() {

  // TODO Auto-generated method stub

  super.onResume();

  Toast.makeText(this, "onResume", Toast.LENGTH_LONG).show();

 }

 

 @Override

 protected void onStart() {

  // TODO Auto-generated method stub

  super.onStart();

  Toast.makeText(this, "onStart", Toast.LENGTH_LONG).show();

 }

 

 @Override

 protected void onStop() {

  // TODO Auto-generated method stub

  super.onStop();

  Toast.makeText(this, "onStop", Toast.LENGTH_LONG).show();

 }

}