Android 中退出多个activity的经典方法

2019-12-12 05:12:32

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1.使用List集合方式

用list保存activity实例，然后逐一干掉

import java.util.LinkedList;import java.util.List;import android.app.Activity;import android.app.AlertDialog;import android.app.Application;import android.content.DialogInterface;import android.content.Intent;public class SysApplication extends Application {private List<Activity> mList = new LinkedList<Activity>();private static SysApplication instance;private SysApplication() {}public synchronized static SysApplication getInstance() {if (null == instance) {instance = new SysApplication();}return instance;}// add Activitypublic void addActivity(Activity activity) {mList.add(activity);}public void exit() {try {for (Activity activity : mList) {if (activity != null)activity.finish();}} catch (Exception e) {e.printStackTrace();} finally {// System.exit(0);//去掉这个}}@Overridepublic void onLowMemory() {super.onLowMemory();System.gc();}}

在每个Activity的onCreate方法中添加类似代码：

public void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);SysApplication.getInstance().addActivity(this);}

　　在需要退出程序的时候，调用：

SysApplication.getInstance().exit();

简而言之，通过单例模式把每个Activity 的引用添加到一个全局链表中，每次退出程序调用System.exit(0)时，先调用链表中Activity 的finish方法　

优点：实现简单，逻辑清晰

2.使用广播

推荐！！好方便！！

基本逻辑就是：定义一个BaseActivity，在这个Activity中绑定广播，在广播的onReceive方法中调用finish();然后以后的Activity都继承这个Activity，退出时发送广播，退出BaseActivity，父activity都退出了，子activity肯定退出。

代码如下：

import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.support.v7.app.AppCompatActivity;public class BaseActivity extends AppCompatActivity {protected BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {@Overridepublic void onReceive(Context context, Intent intent) {finish();}};@Overridepublic void onResume() {super.onResume();// 在当前的activity中注册广播IntentFilter filter = new IntentFilter();filter.addAction("ExitApp");this.registerReceiver(this.broadcastReceiver, filter);}@Overrideprotected void onDestroy() {// TODO Auto-generated method stubsuper.onDestroy(); //解除绑定this.unregisterReceiver(this.broadcastReceiver);}}

　　一个Activity实例：

import android.content.Intent;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import android.view.KeyEvent;import android.view.View;import android.widget.Button;import android.widget.Toast;public class ActivityC extends BaseActivity {Button btn;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_activity_c);SysApplication.getInstance().addActivity(this);btn = (Button) findViewById(R.id.acticityc_btn);//关闭所有的activitybtn.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View view) {}});}/*** 捕获手机物理菜单键*/private long exitTime = 0;@Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) {if(keyCode == KeyEvent.KEYCODE_BACK){//&& event.getAction() == KeyEvent.ACTION_DOWNif((System.currentTimeMillis()-exitTime) > 2000){Toast.makeText(getApplicationContext(), "再按一次退出程序", Toast.LENGTH_SHORT).show();exitTime = System.currentTimeMillis();} else {myExit();}return true;}return super.onKeyDown(keyCode, event);}protected void myExit() {//第二种退出方法// SysApplication.getInstance().exit();Intent intent = new Intent();intent.setAction("ExitApp");this.sendBroadcast(intent);//super.finish();}@Overrideprotected void onStop() {super.onStop();Log.i("tag","ActivityC-onStop");}@Overrideprotected void onDestroy() {super.onDestroy();Log.i("tag","ActivityC-onDestroy");}}

　　就是在退出的地方调用这个：

private long exitTime = 0;@Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) {if(keyCode == KeyEvent.KEYCODE_BACK){//&& event.getAction() == KeyEvent.ACTION_DOWNif((System.currentTimeMillis()-exitTime) > 2000){Toast.makeText(getApplicationContext(), "再按一次退出程序", Toast.LENGTH_SHORT).show();exitTime = System.currentTimeMillis();} else {myExit();}return true;}return super.onKeyDown(keyCode, event);}protected void myExit() {//第二种退出方法// SysApplication.getInstance().exit();Intent intent = new Intent();intent.setAction("ExitApp");this.sendBroadcast(intent);//super.finish();}

　　优点：方便，方便！！只需要在退出的地方发送广播就可以！！

这是我的退出时的输出：

08-09 15:33:48.869 26919-26919/example.com.closeapp I/tag: MainActivity-onPause08-09 15:33:49.279 26919-26919/example.com.closeapp I/tag: MainActivity-onStop08-09 15:33:51.569 26919-26959/example.com.closeapp D/OpenGLRenderer: endAllStagingAnimators on 0x55850598b0 (RippleDrawable) with handle 0x558504151008-09 15:33:56.079 26919-26919/example.com.closeapp I/tag: MainActivity-onDestroy08-09 15:33:56.089 26919-26919/example.com.closeapp I/tag: ActivityB-onDestroy08-09 15:33:56.399 26919-26919/example.com.closeapp I/tag: ActivityC-onDestroy

以上所述是小编给大家介绍的Android 中退出多个activity的经典方法，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对武林网网站的支持！

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