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

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 activity
public 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
}
}
@override
public 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() {
@override
public void onreceive(context context, intent intent) {
finish();
}
};
@override
public 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);
}
@override
protected void ondestroy() {
// todo auto-generated method stub
super.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;
@override
protected 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activity
btn.setonclicklistener(new view.onclicklistener() {
@override
public void onclick(view view) {
}
});
}
/**
* 捕获手机物理菜单键
*/
private long exittime = 0;
@override
public boolean onkeydown(int keycode, keyevent event) {
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();
}
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();
}
@override
protected void onstop() {
super.onstop();
log.i("tag","activityc-onstop");
}
@override
protected 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;
@override
public boolean onkeydown(int keycode, keyevent event) {
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();
}
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-onpause
08-09 15:33:49.279 26919-26919/example.com.closeapp i/tag: mainactivity-onstop
08-09 15:33:51.569 26919-26959/example.com.closeapp d/openglrenderer: endallstaginganimators on 0x55850598b0 (rippledrawable) with handle 0x5585041510
08-09 15:33:56.079 26919-26919/example.com.closeapp i/tag: mainactivity-ondestroy
08-09 15:33:56.089 26919-26919/example.com.closeapp i/tag: activityb-ondestroy
08-09 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