Android 中 退出多个activity的经典方法
1.使用List集合方式
用list保存activity实例，然后逐一干掉
importjava.util.LinkedList;
importjava.util.List;
importandroid.app.Activity;
importandroid.app.AlertDialog;
importandroid.app.Application;
importandroid.content.DialogInterface;
importandroid.content.Intent;
publicclassSysApplicationextendsApplication{
privateList<Activity>mList=newLinkedList<Activity>();
privatestaticSysApplicationinstance;
privateSysApplication(){
}
publicsynchronizedstaticSysApplicationgetInstance(){
if(null==instance){
instance=newSysApplication();
}
returninstance;
}
//addActivity
publicvoidaddActivity(Activityactivity){
mList.add(activity);
}
publicvoidexit(){
try{
for(Activityactivity:mList){
if(activity!=null)
activity.finish();
}
}catch(Exceptione){
e.printStackTrace();
}finally{
//System.exit(0);//去掉这个
}
}
@Override
publicvoidonLowMemory(){
super.onLowMemory();
System.gc();
}
}
在每个Activity的onCreate方法中添加类似代码：
publicvoidonCreate(BundlesavedInstanceState){
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：
importandroid.content.BroadcastReceiver;
importandroid.content.Context;
importandroid.content.Intent;
importandroid.content.IntentFilter;
importandroid.support.v7.app.AppCompatActivity;
publicclassBaseActivityextendsAppCompatActivity{
protectedBroadcastReceiverbroadcastReceiver=newBroadcastReceiver(){
@Override
publicvoidonReceive(Contextcontext,Intentintent){
finish();
}
};
@Override
publicvoidonResume(){
super.onResume();
//在当前的activity中注册广播
IntentFilterfilter=newIntentFilter();
filter.addAction("ExitApp");
this.registerReceiver(this.broadcastReceiver,filter);
}
@Override
protectedvoidonDestroy(){
//TODOAuto-generatedmethodstub
super.onDestroy();//解除绑定
this.unregisterReceiver(this.broadcastReceiver);
}
}
一个Activity实例：
importandroid.content.Intent;
importandroid.support.v7.app.AppCompatActivity;
importandroid.os.Bundle;
importandroid.util.Log;
importandroid.view.KeyEvent;
importandroid.view.View;
importandroid.widget.Button;
importandroid.widget.Toast;
publicclassActivityCextendsBaseActivity{
Buttonbtn;
@Override
protectedvoidonCreate(BundlesavedInstanceState){
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activity
btn.setOnClickListener(newView.OnClickListener(){
@Override
publicvoidonClick(Viewview){
}
});
}
/**
*捕获手机物理菜单键
*/
privatelongexitTime=0;
@Override
publicbooleanonKeyDown(intkeyCode,KeyEventevent){
if(keyCode==KeyEvent.KEYCODE_BACK){//&&event.getAction()==KeyEvent.ACTION_DOWN
if((System.currentTimeMillis()-exitTime)>2000){
Toast.makeText(getApplicationContext(),"再按一次退出程序",Toast.LENGTH_SHORT).show();
exitTime=System.currentTimeMillis();
}else{
myExit();
}
returntrue;
}
returnsuper.onKeyDown(keyCode,event);
}
protectedvoidmyExit(){
//第二种退出方法
//SysApplication.getInstance().exit();
Intentintent=newIntent();
intent.setAction("ExitApp");
this.sendBroadcast(intent);
//super.finish();
}
@Override
protectedvoidonStop(){
super.onStop();
Log.i("tag","ActivityC-onStop");
}
@Override
protectedvoidonDestroy(){
super.onDestroy();
Log.i("tag","ActivityC-onDestroy");
}
}
就是在退出的地方调用这个：
privatelongexitTime=0;
@Override
publicbooleanonKeyDown(intkeyCode,KeyEventevent){
if(keyCode==KeyEvent.KEYCODE_BACK){//&&event.getAction()==KeyEvent.ACTION_DOWN
if((System.currentTimeMillis()-exitTime)>2000){
Toast.makeText(getApplicationContext(),"再按一次退出程序",Toast.LENGTH_SHORT).show();
exitTime=System.currentTimeMillis();
}else{
myExit();
}
returntrue;
}
returnsuper.onKeyDown(keyCode,event);
}
protectedvoidmyExit(){
//第二种退出方法
//SysApplication.getInstance().exit();
Intentintent=newIntent();
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：
08-0915:33:48.86926919-26919/example.com.closeappI/tag:MainActivity-onPause 08-0915:33:49.27926919-26919/example.com.closeappI/tag:MainActivity-onStop 08-0915:33:51.56926919-26959/example.com.closeappD/OpenGLRenderer:endAllStagingAnimatorson0x55850598b0(RippleDrawable)withhandle0x5585041510 08-0915:33:56.07926919-26919/example.com.closeappI/tag:MainActivity-onDestroy 08-0915:33:56.08926919-26919/example.com.closeappI/tag:ActivityB-onDestroy 08-0915:33:56.39926919-26919/example.com.closeappI/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毛票票网站的支持！