android - 带有 IntentFilter 的 BroadcastReceiver for Intent.ACTION_PACKAGE_REPLACED 在服务中不工作

Question

我正在尝试设置一项服务来检查设备中何时安装了 Activity 的新更新。我已经在应用程序 Activity 中这样做了，在 list 中声明了 Broadcastreceiver 并且它工作得很好。

但是，当我尝试在服务中运行该接收器并动态声明它时，我的 onReceive 永远不会被调用。这是我的服务代码:

public class UpdateService extends Service {    
 private static String mPackage = "com.my.package";
 private static String mActivityName = "myActivity";
 private BroadcastReceiver mUpdateReceiver; 

 @Override
 public void onCreate() {
  super.onCreate();
  mUpdateReceiver = new BroadcastReceiver() {

   @Override
   public void onReceive(Context context, Intent intent) {
    Log.d("mTag","In the BroadcastReceiver onReceive()");
    if (intent.getAction().equalsIgnoreCase(Intent.ACTION_PACKAGE_REPLACED)) {
     // Log that a new update is has been found
     Log.d("mTag","New version of the app has been installed.");
     Log.d("mTag", "Intent data: " + intent.getDataString());
     Log.d("mTag","My package: " + mPackage);
    }
   }
  };

  Log.d("mTag","In the service onCreate() method.");
  IntentFilter filter = new IntentFilter();
  filter.addAction(Intent.ACTION_PACKAGE_REPLACED);
  filter.addAction(Intent.ACTION_PACKAGE_REMOVED);
  filter.addAction(Intent.ACTION_PACKAGE_ADDED);
  registerReceiver(mUpdateReceiver,filter);
 }

 @Override
 public int onStartCommand(Intent intent, int flags, int startId) {
  Log.d("mTag","UpdateService started");            
  return Service.START_STICKY;
 }

 @Override
 public void onDestroy() {
  super.onDestroy();
  unregisterReceiver(mUpdateReceiver);
  Log.d("mTag","Service destroyed");
 }

 @Override
 public IBinder onBind(Intent arg0) {
  return null;
 }
}

服务 onCreate() 中的日志被调用，这告诉我服务已启动并正在运行。但是，在通过 adb 安装和替换一些应用程序后，BroadcastReceiver 中的任何日志都不会调用 onReceive() 方法。

这是我的主要 Activity :

public class MainActivity extends Activity {
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  startService(new Intent(this, UpdateService.class));
 }
}

你们知道为什么 onReceive() 没有被调用吗？

谢谢。

我的代码基于这两个引用:

• BroadcastReceiver within a Service
• How to know Android app upgraded?

Answer 1

您应该将数据架构添加到您的 IntentFilter。

 IntentFilter filter = new IntentFilter();
  filter.addAction(Intent.ACTION_PACKAGE_REPLACED);
  filter.addAction(Intent.ACTION_PACKAGE_REMOVED);
  filter.addAction(Intent.ACTION_PACKAGE_ADDED);

  filter.addDataScheme("package");

  registerReceiver(mUpdateReceiver,filter);