get_content - intent filter android manifest

"Los componentes de IntentReceiver no pueden registrarse para recibir intentos" al intentar determinar el nivel de la batería

Question

Estoy tratando de obtener información de la batería de mi aplicación siguiendo las pautas en http://developer.android.com/training/monitoring-device-state/battery-monitoring.html

Este es el método ideado para verificar el nivel de la batería:

public void sendBatteryInfoMessage(){

    IntentFilter iFilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
    Intent batteryStatus = c.registerReceiver(null, iFilter);

    int status = batteryStatus.getIntExtra(BatteryManager.EXTRA_STATUS, -1);
    boolean isCharging = status == BatteryManager.BATTERY_STATUS_CHARGING || status == BatteryManager.BATTERY_STATUS_FULL;

    int chargePlug = batteryStatus.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);
    boolean isUsbCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_USB;
    boolean isAcCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_AC;

    int batteryLevel = batteryStatus.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
    int scale = batteryStatus.getIntExtra(BatteryManager.EXTRA_SCALE, -1);

    float batteryPct = batteryLevel / (float) scale;

}

c se inicializa como objeto de Context anteriormente en la clase.

Este es el mensaje de error que estoy recibiendo

    07-24 18:11:23.445      634-634/wifi.myapp.sudara.lk.sudara_app W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0x40028890)
07-24 18:11:23.485      634-634/wifi.myapp.sudara.lk.sudara_app E/AndroidRuntime﹕ FATAL EXCEPTION: main
    java.lang.RuntimeException: Unable to start receiver wifi.myapp.sudara.lk.sudara_app.SmsActivity: android.content.ReceiverCallNotAllowedException: IntentReceiver components are not allowed to register to receive intents
            at android.app.ActivityThread.handleReceiver(ActivityThread.java:2821)
            at android.app.ActivityThread.access$3200(ActivityThread.java:125)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2083)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:123)
            at android.app.ActivityThread.main(ActivityThread.java:4627)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:521)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: android.content.ReceiverCallNotAllowedException: IntentReceiver components are not allowed to register to receive intents
            at android.app.ReceiverRestrictedContext.registerReceiver(ContextImpl.java:138)
            at android.app.ReceiverRestrictedContext.registerReceiver(ContextImpl.java:132)
            at wifi.myapp.sudara.lk.sudara_app.BatteryInfo.sendBatteryInfoMessage(BatteryInfo.java:25)
            at wifi.myapp.sudara.lk.sudara_app.SmsActivity.onReceive(SmsActivity.java:53)
            at android.app.ActivityThread.handleReceiver(ActivityThread.java:2810)
            at android.app.ActivityThread.access$3200(ActivityThread.java:125)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2083)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:123)
            at android.app.ActivityThread.main(ActivityThread.java:4627)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:521)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
            at dalvik.system.NativeStart.main(Native Method)

Lo que necesito saber es que el significado de los IntentReceiver components are not allowed to register to receive intents de IntentReceiver components are not allowed to register to receive intents y cómo IntentReceiver components are not allowed to register to receive intents .

Gracias

Answer 1

En lugar de:

c.registerReceiver(null, iFilter)

utilizar:

c.getApplicationContext().registerReceiver(null, iFilter)

El Context que se pasa a onReceive() está bloqueado para llamar a registerReceiver() , incluso con un BroadcastReceiver null .