Android 应用程序多Activity跳转之后退出整个程序

在应用中肯定遇到有这样的问题，在应用中在于多的Activity中跳转，这些Activity都存在Activity栈中了。所以按返回键的时候都是一个一个的将原来的Activity弹回。如果我们想捕获到back事件之后直接退出整个程序，就要思考了。特别是2.2之后的安全机制考虑之后。

粘贴点代码，以备之后使用。

packagecom.jftt;

importandroid.app.Activity;
importandroid.app.ActivityManager;
importandroid.app.AlertDialog;
importandroid.content.Context;
importandroid.content.DialogInterface;
importandroid.content.Intent;
importandroid.os.Bundle;
importandroid.util.Log;
importandroid.view.KeyEvent;
importandroid.view.View;
importandroid.view.View.OnClickListener;
importandroid.widget.Button;

publicclassTestLogoutextendsActivity{
publicstaticfinalStringTAG=TestLogout.class.getSimpleName();
privateButtonbtn1;
privateButtonbtn2;
privateButtonbtn3;
privateButtonbtn4;
privateButtonbtn5;
privateButtongo;

@Override
protectedvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.logout);
this.onStart();

btn1=(Button)findViewById(R.id.btn1);
btn1.setOnClickListener(newOnClickListener(){
@Override
publicvoidonClick(Viewv){
android.os.Process.killProcess(android.os.Process.myPid());//获取PID
}
});

btn2=(Button)findViewById(R.id.btn2);
btn2.setOnClickListener(newOnClickListener(){
@Override
publicvoidonClick(Viewv){
System.exit(0);//常规java、c#的标准退出法，返回值为0代表正常退出
}
});

btn3=(Button)findViewById(R.id.btn3);
btn3.setOnClickListener(newOnClickListener(){
@Override
publicvoidonClick(Viewv){
Log.i(TAG,"close"+getPackageName());
ActivityManageram=(ActivityManager)TestLogout.this.getSystemService(Context.ACTIVITY_SERVICE);
am.restartPackage(getPackageName());
//am.killBackgroundProcesses(getPackageName());
}
});

btn4=(Button)findViewById(R.id.btn4);
btn4.setOnClickListener(newOnClickListener(){
@Override
publicvoidonClick(Viewv){
Intentintent=newIntent();
//intent.setClass((B或者C或者D).this,A.class);
intent.setClass(TestLogout.this,TestLogout.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent.putExtra("flag",1);
startActivity(intent);
}
});

//此方法并未杀掉应用程序而是把launcher调起
btn5=(Button)findViewById(R.id.btn5);
btn5.setOnClickListener(newOnClickListener(){
@Override
publicvoidonClick(Viewv){
IntentstartMain=newIntent(Intent.ACTION_MAIN);
startMain.addCategory(Intent.CATEGORY_HOME);
startMain.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(startMain);
}
});

go=(Button)findViewById(R.id.go);
go.setOnClickListener(newOnClickListener(){
@Override
publicvoidonClick(Viewv){
Intentintent=newIntent(TestLogout.this,TestLogout.class);
//intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
}
});

}

protectedvoidonStart(){
super.onStart();
Intentintent=getIntent();
intx=intent.getIntExtra("flag",-1);
if(x==0){
finish();
}
}

@Override
publicbooleanonKeyDown(intkeyCode,KeyEventevent){
if(keyCode==KeyEvent.KEYCODE_BACK&&event.getRepeatCount()==0){
AlertDialog.BuilderalertbBuilder=newAlertDialog.Builder(this);
alertbBuilder.setIcon(R.drawable.icon).setTitle("友情提示...").setMessage("你确定要离开吗？");
alertbBuilder.setPositiveButton("确定",newDialogInterface.OnClickListener(){
@Override
publicvoidonClick(DialogInterfacedialog,intwhich){
//结束这个Activity
intnPid=android.os.Process.myPid();
android.os.Process.killProcess(nPid);
}
});
alertbBuilder.setNegativeButton("取消",newDialogInterface.OnClickListener(){
@Override
publicvoidonClick(DialogInterfacedialog,intwhich){
dialog.cancel();
}
}).create();
alertbBuilder.show();
}
returntrue;
}
}

package com.jftt;

import android.app.Activity;
import android.app.ActivityManager;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class TestLogout extends Activity {
	public static final String TAG = TestLogout.class.getSimpleName();
	private Button btn1;
	private Button btn2;
	private Button btn3;
	private Button btn4;
	private Button btn5;
	private Button go;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.logout);
		this.onStart();

		btn1 = (Button) findViewById(R.id.btn1);
		btn1.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				android.os.Process.killProcess(android.os.Process.myPid()); // 获取PID
			}
		});

		btn2 = (Button) findViewById(R.id.btn2);
		btn2.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				System.exit(0); // 常规java、c#的标准退出法，返回值为0代表正常退出
			}
		});

		btn3 = (Button) findViewById(R.id.btn3);
		btn3.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				Log.i(TAG, "close " + getPackageName());
				ActivityManager am = (ActivityManager) TestLogout.this .getSystemService(Context.ACTIVITY_SERVICE);
				am.restartPackage(getPackageName());
				// am.killBackgroundProcesses(getPackageName());
			}
		});
		
		btn4 = (Button) findViewById(R.id.btn4);
		btn4.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				Intent intent = new Intent();
				// intent.setClass((B或者C或者D).this, A.class);
				intent.setClass(TestLogout.this, TestLogout.class);
				intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
				intent.putExtra("flag", 1);
				startActivity(intent);
			}
		});
		
		//此方法并未杀掉应用程序 而是把launcher调起
		btn5 = (Button) findViewById(R.id.btn5);
		btn5.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				Intent startMain = new Intent(Intent.ACTION_MAIN);
				startMain.addCategory(Intent.CATEGORY_HOME);
				startMain.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
				startActivity(startMain);
			}
		});

		go = (Button) findViewById(R.id.go);
		go.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				Intent intent = new Intent(TestLogout.this, TestLogout.class);
				// intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
				startActivity(intent);
			}
		});

	}
	
	protected void onStart() {
		super.onStart();
		Intent intent = getIntent();
		int x = intent.getIntExtra("flag", -1);
		if (x == 0) {
			finish();
		}
	}
	
	@Override
	public boolean onKeyDown(int keyCode, KeyEvent event) {
		if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
			AlertDialog.Builder alertbBuilder = new AlertDialog.Builder(this);
			alertbBuilder.setIcon(R.drawable.icon).setTitle("友情提示...").setMessage("你确定要离开吗？");
			alertbBuilder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
						@Override
						public void onClick(DialogInterface dialog, int which) {
							// 结束这个Activity
							int nPid = android.os.Process.myPid();
							android.os.Process.killProcess(nPid);
						}
					});
			alertbBuilder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
						@Override
						public void onClick(DialogInterface dialog, int which) {
							dialog.cancel();
						}
					}).create();
			alertbBuilder.show();
		}
		return true;
	}
}

packagecom.jftt;

importjava.util.Stack;

importandroid.app.Activity;

publicclassActiivtyStack{
privatestaticStack<Activity>mActivityStack;
privatestaticActiivtyStackinstance;

privateActiivtyStack(){
}
publicstaticActiivtyStackgetScreenManager(){
if(instance==null){
instance=newActiivtyStack();
}
returninstance;
}

//退出栈顶Activity
publicvoidpopActivity(Activityactivity){
if(activity!=null){
activity.finish();
mActivityStack.remove(activity);
//mActivityStack.pop();
activity=null;
}
}

//获得当前栈顶Activity
publicActivitycurrentActivity(){
Activityactivity=mActivityStack.lastElement();
//Activityactivity=mActivityStack.pop();
returnactivity;
}

//将当前Activity推入栈中
publicvoidpushActivity(Activityactivity){
if(mActivityStack==null){
mActivityStack=newStack<Activity>();
}
mActivityStack.add(activity);
//mActivityStack.push(activity);
}

//退出栈中所有Activity
publicvoidpopAllActivityExceptOne(Class<Activity>cls){
while(true){
Activityactivity=currentActivity();
if(activity==null){
break;
}
if(activity.getClass().equals(cls)){
break;
}
popActivity(activity);
}
}

}

package com.jftt;

import java.util.Stack;

import android.app.Activity;

public class ActiivtyStack {
	private static Stack<Activity> mActivityStack;
	private static ActiivtyStack instance;

	private ActiivtyStack() {
	}
	public static ActiivtyStack getScreenManager() {
		if (instance == null) {
			instance = new ActiivtyStack();
		}
		return instance;
	}

	// 退出栈顶Activity
	public void popActivity(Activity activity) {
		if (activity != null) {
			activity.finish();
			mActivityStack.remove(activity);
			// mActivityStack.pop();
			activity = null;
		}
	}

	// 获得当前栈顶Activity
	public Activity currentActivity() {
		Activity activity = mActivityStack.lastElement();
		// Activity activity = mActivityStack.pop();
		return activity;
	}

	// 将当前Activity推入栈中
	public void pushActivity(Activity activity) {
		if (mActivityStack == null) {
			mActivityStack = new Stack<Activity>();
		}
		mActivityStack.add(activity);
		// mActivityStack.push(activity);
	}

	// 退出栈中所有Activity
	public void popAllActivityExceptOne(Class<Activity> cls) {
		while (true) {
			Activity activity = currentActivity();
			if (activity == null) {
				break;
			}
			if (activity.getClass().equals(cls)) {
				break;
			}
			popActivity(activity);
		}
	}

}

logout.xml

<?xmlversion="1.0"encoding="utf-8"?>
<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<Button
android:id="@+id/btn1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="logoutbutton1"
/>
<Button
android:id="@+id/btn2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="logoutbutton2"
/>
<Button
android:id="@+id/btn3"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="logoutbutton3"
/>
<Button
android:id="@+id/btn4"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="gotofirst"
/>
<Button
android:id="@+id/btn5"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="gotolauncher"
/>
<Button
android:id="@+id/go"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="goanotheractivity"
/>
<!--
<EditText
android:id="@+id/et01"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
/>
<ImageView
android:id="@+id/iv01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
-->
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
	<Button
		android:id="@+id/btn1"
	    android:layout_width="fill_parent" 
	    android:layout_height="wrap_content"
		android:text="logout button1"
		/>
	<Button
		android:id="@+id/btn2"
	    android:layout_width="fill_parent" 
	    android:layout_height="wrap_content"
		android:text="logout button2"
		/>
	<Button
		android:id="@+id/btn3"
	    android:layout_width="fill_parent" 
	    android:layout_height="wrap_content"
		android:text="logout button3"
		/>
	<Button
		android:id="@+id/btn4"
	    android:layout_width="fill_parent" 
	    android:layout_height="wrap_content"
		android:text="go to first"
		/>
	<Button
		android:id="@+id/btn5"
	    android:layout_width="fill_parent" 
	    android:layout_height="wrap_content"
		android:text="go to launcher"
		/>
	<Button
		android:id="@+id/go"
	    android:layout_width="fill_parent" 
	    android:layout_height="wrap_content"
		android:text="go another activity"
		/>
    <!--
	<EditText
		android:id="@+id/et01"
		android:layout_width="fill_parent"
		android:layout_height="fill_parent"
		/>
	<ImageView
		android:id="@+id/iv01"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		/>
	-->
</LinearLayout>

manifest中的权限：

<uses-permissionandroid:name="android.permission.KILL_BACKGROUND_PROCESSES"/>
<uses-permissionandroid:name="android.permission.RESTART_PACKAGE"/>