利用信鸽推送实现Android登录后强制退出的功能(单点登录)

首先整理思路,先思考实现逻辑:
1.集成信鸽推送
2.实现自定义推送
3.在自定义推送中,接收推送的方法内启动强制退出功能。

思路逻辑很简单,但是实现起来就得一步一步做,先集成信鸽:
这里主要是参考官方开发文档即可
然后是实现自定义推送接受方,即自定义receiver

CustomReceiver.java

/**
 * 
 */
import u.upd.l;
import android.content.Context;
import android.content.Intent;
import com.dhcc.gpscarmanager_phone.CustomServices.ForceOfflineService;
import com.dhcc.gpscarmanager_phone.Util.L;
import com.tencent.android.tpush.XGPushBaseReceiver;
import com.tencent.android.tpush.XGPushClickedResult;
import com.tencent.android.tpush.XGPushRegisterResult;
import com.tencent.android.tpush.XGPushShowedResult;
import com.tencent.android.tpush.XGPushTextMessage;

public class CustomReceiver extends XGPushBaseReceiver {
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * com.tencent.android.tpush.XGPushBaseReceiver#onDeleteTagResult(android
	 * .content.Context, int, java.lang.String)
	 */
	@Override
	public void onDeleteTagResult(Context context, int arg1, String arg2) {
		// TODO Auto-generated method stub
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * com.tencent.android.tpush.XGPushBaseReceiver#onNotifactionClickedResult
	 * (android.content.Context, com.tencent.android.tpush.XGPushClickedResult)
	 */
	@Override
	public void onNotifactionClickedResult(Context context,
			XGPushClickedResult arg1) {
		// TODO Auto-generated method stub
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * com.tencent.android.tpush.XGPushBaseReceiver#onNotifactionShowedResult
	 * (android.content.Context, com.tencent.android.tpush.XGPushShowedResult)
	 */
	@Override
	public void onNotifactionShowedResult(Context context,
			XGPushShowedResult result) {
		// TODO Auto-generated method stub
		// 这里是测试代码,在接受到“下线”这两个字后,接收通知的应用强行下线
		if ("下线".equals(result.getContent())) {
			L.e(result.getContent());
			context.getApplicationContext().startService(new Intent(context.getApplicationContext(), ForceOfflineService.class));
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * com.tencent.android.tpush.XGPushBaseReceiver#onRegisterResult(android
	 * .content.Context, int, com.tencent.android.tpush.XGPushRegisterResult)
	 */
	@Override
	public void onRegisterResult(Context context, int arg1,
			XGPushRegisterResult arg2) {
		// TODO Auto-generated method stub
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * com.tencent.android.tpush.XGPushBaseReceiver#onSetTagResult(android.content
	 * .Context, int, java.lang.String)
	 */
	@Override
	public void onSetTagResult(Context context, int arg1, String arg2) {
		// TODO Auto-generated method stub
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * com.tencent.android.tpush.XGPushBaseReceiver#onTextMessage(android.content
	 * .Context, com.tencent.android.tpush.XGPushTextMessage)
	 */
	@Override
	public void onTextMessage(Context context, XGPushTextMessage message) {
		// TODO Auto-generated method stub
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * com.tencent.android.tpush.XGPushBaseReceiver#onUnregisterResult(android
	 * .content.Context, int)
	 */
	@Override
	public void onUnregisterResult(Context context, int arg1) {
		// TODO Auto-generated method stub
	}
}


在注册文件中加入该Revceiver的静态注册代码:

<receiver android:name="CustomReceivers.CustomReceiver" >
            <intent-filter>
                <!-- 接收消息透传 -->
                <action android:name="com.tencent.android.tpush.action.PUSH_MESSAGE" />
                <!-- 监听注册、反注册、设置/删除标签、通知被点击等处理结果 -->
                <action android:name="com.tencent.android.tpush.action.FEEDBACK" />
            </intent-filter>
        </receiver>

然后注意这句代码:

if ("下线".equals(result.getContent())) {
			L.e(result.getContent());
			context.getApplicationContext().startService(new Intent(context.getApplicationContext(), ForceOfflineService.class));
		}
由于目前是测试代码,所以我判断的是如果服务端发送的是“下线”的话,我就将该设备强制下线,在实际开发的过程中,其流程应当是

用户登录-> 判断当前的Token与数据库中存储的Token是否一致-> 如果不一致,则对数据库中的Token的用户发送约定好的下线通知,可以是参数也可以是字符串-> 手机端接到下线通知后,强制下线-> 服务端将新的Token保存到数据库中去,老的Token销毁


然后可以注意到,这里是启动了一个Service,然后利用Service进行下线操作的:

/**
 * 
 */
import com.dhcc.gpscarmanager_phone.CustomReceivers.ForceOfflineReceiver;
import com.dhcc.gpscarmanager_phone.Util.L;
import u.upd.l;
import android.app.Service;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.IBinder;
import android.util.Log;

public class ForceOfflineService extends Service {
	private static final String TAG = "ForceOfflineService";   
	ForceOfflineReceiver forceOfflineReceiver;
    @Override  
    public void onCreate() {  
        Log.i(TAG, "ExampleService-onCreate");  
        super.onCreate();  
       
        IntentFilter intentFilter=new IntentFilter();
        intentFilter.addAction("com.dhcc.AppOffline");
         forceOfflineReceiver=new ForceOfflineReceiver();
        registerReceiver(forceOfflineReceiver, intentFilter);
        
        Intent intent =new Intent("com.dhcc.AppOffline");
        getApplicationContext().sendBroadcast(intent);
    }  
  
    @Override  
    public void onStart(Intent intent, int startId) {  
        Log.i(TAG, "ExampleService-onStart");  
        super.onStart(intent, startId);  
    }  
  
    @Override  
    public int onStartCommand(Intent intent, int flags, int startId) {  
        //执行文件的下载或者播放等操作  
        Log.i(TAG, "ExampleService-onStartCommand");  
        /*  
         * 这里返回状态有三个值,分别是:  
         * 1、START_STICKY:当服务进程在运行时被杀死,系统将会把它置为started状态,但是不保存其传递的Intent对象,之后,系统会尝试重新创建服务;  
         * 2、START_NOT_STICKY:当服务进程在运行时被杀死,并且没有新的Intent对象传递过来的话,系统将会把它置为started状态,  
         *   但是系统不会重新创建服务,直到startService(Intent intent)方法再次被调用;  
         * 3、START_REDELIVER_INTENT:当服务进程在运行时被杀死,它将会在隔一段时间后自动创建,并且最后一个传递的Intent对象将会再次传递过来。  
         */  
        return super.onStartCommand(intent, flags, startId);  
    }  
  
    @Override  
    public IBinder onBind(Intent intent) {  
        Log.i(TAG, "ExampleService-onBind");  
        return null;  
    }  
      
    @Override  
    public void onDestroy() {  
        Log.i(TAG, "ExampleService-onDestroy");  
        super.onDestroy();  
        unregisterReceiver(forceOfflineReceiver);
    }  
  
}

别忘了在配置文件中加入Service的注册:

<!-- 强制下线服务 -->
		<service android:name="com.dhcc.gpscarmanager_phone.CustomServices.ForceOfflineService"/>
在OnCreate方法中加入了启动强制下线的Receiver的代码:

IntentFilter intentFilter = new IntentFilter();
		intentFilter.addAction("com.dhcc.AppOffline");
		forceOfflineReceiver = new ForceOfflineReceiver();
		registerReceiver(forceOfflineReceiver, intentFilter);
		Intent intent = new Intent("com.dhcc.AppOffline");
		getApplicationContext().sendBroadcast(intent);

这里要注意的是,不能直接用Context进行启动下线Receiver的操作,否则会报错:

IntentReceiver components are not allowed to register to receive intents

必须利用getApplicationContext的方式动态注册ForceOfflineRecevier(),不能用静态注册的方式,否则也会报上边同样的错误(但是这里不知道为什么)
具体解决原因参照:http://blog.csdn.net/eimsteim/article/details/7220920
然后启动这个ForceOfflineReceiver,他的内容是这样的:
import com.baidu.navisdk.util.common.Stopwatch;
import com.dhcc.gpscarmanager_phone.CustomServices.ForceOfflineService;
import com.dhcc.gpscarmanager_phone.CustomView.ActivityCollector;
import com.dhcc.gpscarmanager_phone.Module.Welcome.WelcomPage.LoginActivity;
import android.app.AlertDialog;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.view.WindowManager;

public class ForceOfflineReceiver extends BroadcastReceiver {
	/*
	 * (non-Javadoc)
	 * 
	 * @see android.content.BroadcastReceiver#onReceive(android.content.Context,
	 * android.content.Intent)
	 */
	@Override
	public void onReceive(final Context context, Intent intent) {
		// TODO Auto-generated method stub
		intent = new Intent(context, ForceOfflineService.class);  
		context.stopService(intent);
		AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(context);
		dialogBuilder.setTitle("已下线");
		dialogBuilder.setMessage("您的账户已在另一个设备登录,请尝试重新登陆");
		dialogBuilder.setCancelable(false);
		dialogBuilder.setPositiveButton("登   录", new OnClickListener() {
			@Override
			public void onClick(DialogInterface arg0, int arg1) {
				// TODO Auto-generated method stub
				ActivityCollector.finishAll();
				Intent intent = new Intent(context, LoginActivity.class);
				intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
				context.startActivity(intent);
			}
		});
		AlertDialog alertDialog = dialogBuilder.create();
		alertDialog.getWindow().setType(
				WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
		alertDialog.show();
	}
}

启动一个窗口,告诉用户你的账户在其他设备登录了,然后强制启动登录界面,并把之前启动的Activity都关闭掉,所以这里的关键类就是
ActivityCollector了:

import java.util.ArrayList;
import java.util.List;
import android.app.Activity;

public class ActivityCollector {
	
	public static List<Activity> activities=new ArrayList<Activity>();
	
	public static void addActivity(Activity activity){
		
		activities.add(activity);
		
	}
	
	public static void removeActivity(Activity activity){
		
		activities.remove(activity);
		
	}
	
	public static void finishAll(){
		
		for(Activity activity:activities){
			
			if(activity.isFinishing()){
				
				activity.finish();
			}
		}
		
	}
}

功能自己看,然后就是在你的基类BaseActivity里加入对应的代码:

@Override
	public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
		ActivityCollector.addActivity(this);
}
protected void onDestroy(){
		
		super.onDestroy();
		ActivityCollector.removeActivity(this);
		
	}

这样就把新启动的Activity管理起来了,然后在关闭的时候利用循环关闭对应的Activity即可了。
由于使用的是系统的弹出窗口,所以要在配置文件中加入这么一句权限:

<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />





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