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BroadcastReceiver onReceive()在動態注冊時不調用

[英]BroadcastReceiver onReceive() not Called when registered dynamically

當BroadcastReceiver在Manifest中注冊時調用函數“onReceive”,但如果動態注冊則不調用。

有效的代碼如下:

public class EyeGesture extends BroadcastReceiver {
    //Eye Gesture
    private static IntentFilter eyeGestureIntent;
    private static Context eyeGestureContext;
    private static StringBuilder gestureInfo = null;
    private static BroadcastReceiver broadcastReceiver;

   // public void startEyeListening() {
        //Eye Gesture

    //}

    @Override
    public void onReceive(Context context, Intent intent) {
       // this = context;
        if (intent.getStringExtra("gesture").equals("WINK")) {
            Log.e("WINKED ","");
        }else {
            Log.e("SOMETHING", "is detected " + intent.getStringExtra("gesture"));
        }
        //Disable Camera Snapshot
       // abortBroadcast();

    }

    public void stopEyeListening() {
        eyeGestureContext.unregisterReceiver(broadcastReceiver);
        eyeGestureIntent = null;
        eyeGestureContext = null;
        gestureInfo = null;
    }

}

下面是清單文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.inno.inno.glassplugin" >

    <uses-permission android:name="com.google.android.glass.permission.DEVELOPMENT" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainFunct"
            android:icon="@drawable/ic_glass_logo"
            android:label="@string/title_activity_main_funct" >
            <intent-filter>
                <action android:name="com.google.android.glass.action.VOICE_TRIGGER" />
            </intent-filter>
            <meta-data
                android:name="com.google.android.glass.VoiceTrigger"
                android:resource="@xml/voice_trigger" />
        </activity>

        <receiver android:name="com.inno.inno.glassplugin.EyeGesture">
            <intent-filter>
                <action android:name="com.google.android.glass.action.EYE_GESTURE" />
            </intent-filter>
        </receiver>
    </application>

</manifest>

問題是動態注冊時不會調用“onReceive”。 我必須以動態的方式做到這一點。 下面是工作代碼的代碼。

public class EyeGesture extends Activity {
    //Eye Gesture
    IntentFilter eyeGestureIntentFilter;
    Context eyeGestureContext;
    BroadcastReceiver broadcastReceiver;


    public  EyeGesture(){
        Log.e("CONSTRUCTOR ", "");
        eyeGestureContext = MainFunct.getCurrentContext();
        eyeGestureIntentFilter = new IntentFilter("com.google.glass.action.EYE_GESTURE");
        eyeGestureIntentFilter.setPriority(1000);
        startRunning();
    }

    void startRunning(){
        eyeGestureContext.registerReceiver(new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                Log.e("Received ", " Something");
            }
        },eyeGestureIntentFilter);
    }


    @Override
    public  void onResume(){
        super.onResume();
    }

    @Override
    public  void  onPause(){
        super.onPause();
        unregisterReceiver(broadcastReceiver);
    }
    public void stopEyeListening() {
        eyeGestureContext.unregisterReceiver(broadcastReceiver);
        eyeGestureIntentFilter = null;
        eyeGestureContext = null;
    }

}

另外,我不想從這個類擴展BroadcastReceiver。 如果動態注冊,為什么我沒有收到任何內容。 我還從Manifest中刪除了以下行:

 <receiver android:name="com.inno.inno.glassplugin.EyeGesture">
                <intent-filter>
                    <action android:name="com.google.android.glass.action.EYE_GESTURE" />
                </intent-filter>
 </receiver>

但仍然沒有用。 沒有拋出錯誤或異常。 我究竟做錯了什么?

你使用明確的意圖嗎? 似乎動態注冊的廣播接收器無法接收顯式意圖。 隱含的意圖工作。 供參考: http//streamingcon.blogspot.com/2014/04/dynamic-broadcastreceiver-registration.html

如果問題不是顯式意圖,但是如果你使用LocalBroadcastManager進行sendBroadcast,那么確保registerReceiver也被稱為LocalBroadcastManager而不是Context

嘗試使用ApplicationContext而不是Activity。

Modyifing線:

eyeGestureContext = MainFunct.getCurrentContext();

我會按順序嘗試:

  1. eyeGestureContext = getApplicationContext();
  2. eyeGestureContext = getApplication();

如果以上不起作用,我會擴展應用程序並執行:

public class MyExtendedApplication extends Application {

    private static MyExtendedApplication instance;

    public static MyExtendedApplication getInstance() {
        return instance;
    }
}

這適用於全球“android.net.conn.CONNECTIVITY_CHANGE”廣播

Context c = MyExtendedApplication.getInstance();
c.registerReceiver(
        connectivtyChangedReceiver,
        connectivityFilter);

你應該也可以使用“com.google.android.glass.action.EYE_GESTURE”

在XE21.3中觀看adb logcat,看起來com.google.android.glass.action.EYE_GESTURE意圖永遠不會到達事件總線; 相反,它直接跳到com.google.glass.action.TAKE_PICTURE,這與相機按鈕的意圖相同。 所以看起來像是手勢API被刪除而沒有公告。

  • 接收方應該擴展BroadcastReceiver類。
  • 在清單中定義接收器
  • 在代碼中(可能是onCreate),注冊接收器
    • 創建一個接收器對象
    • 定義意圖過濾器
    • 調用RegisterReceiver()傳入接收器和intent過濾器

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