BaseActivity如下:

package cc.c;

import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;

public class BaseActivity extends Activity {
	private BroadcastReceiver mBroadcastReceiver=null;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
    	super.onCreate(savedInstanceState);
    	//注册广播
    	initBroadcastReceiver();
    }
    
    private void initBroadcastReceiver(){
    	mBroadcastReceiver=new BroadcastReceiver() {
			@Override
			public void onReceive(Context context, Intent intent) {
				finish();
			}
		};
		IntentFilter intentFilter=new IntentFilter("cc.finish");
		registerReceiver(mBroadcastReceiver, intentFilter);
    }
    
    
    @Override
    protected void onDestroy() {
    	super.onDestroy();
    	//取消广播
    	destroyBroadcastReceiver();
    }
    
    private void destroyBroadcastReceiver(){
    	if (mBroadcastReceiver!=null) {
			unregisterReceiver(mBroadcastReceiver);
		}
    }
    
}

MainActivity如下:

package cc.c;

import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
/**
 * Demo描述:
 * 有时需要在某个时刻完全退出应用即finish掉所有的Activity.
 * 
 * 解决方式:
 * 1 编写BaseActivity
 * 2 在BaseActivity中注册广播接收者,在onReceive()中执行finish()
 * 3 App中Activity均继承自该BaseActivity.
 * 
 *   当在某个时刻需要退出应用时,发出一个广播即可.
 * 
 *
 */
public class MainActivity extends BaseActivity {
    private Context mContext;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		init();
	}
	
	private void init(){
		mContext=this;
		Button button=(Button) findViewById(R.id.mainActivityButton);
		button.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View view) {
				Intent intent=new Intent(mContext, OtherActivity.class);
				startActivity(intent);
			}
		});
	}
	
	@Override
	protected void onDestroy() {
		System.out.println("MainActivity finish");
		super.onDestroy();
	}

}

OtherActivity如下:

package cc.c;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class OtherActivity extends BaseActivity {
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.other);
		init();
	}
	
	private void init(){
		Button button=(Button) findViewById(R.id.otherActivityButton);
		button.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View view) {
				//发送广播,达到退出应用的目的
				Intent intent=new Intent();
				intent.setAction("cc.finish");
				sendBroadcast(intent);
			}
		});
	}

	@Override
	protected void onDestroy() {
		System.out.println("OtherActivity finish");
		super.onDestroy();
	}
}

main.xml如下:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <Button
        android:id="@+id/mainActivityButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:text="跳转到其余Activity" />

</RelativeLayout>

other.xml如下:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <Button
        android:id="@+id/otherActivityButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:text="点击后退出应用" />

</RelativeLayout>

AndroidManifest.xml如下:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="cc.c"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="10"
        android:targetSdkVersion="10" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="cc.c.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name="cc.c.OtherActivity"></activity>
    </application>

</manifest>