清单中声明的​​电池广播接收器不起作用

Question

我想接收广播BATTERY_LOW，所以我在清单中声明了广播接收器（为了不依赖于当前的活动。我希望我的应用程序即使在它没有运行时接收这个广播。这就是我做的。

<?xml version="1.0" encoding="utf-8"?>

<application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
    <receiver android:name=".BatteryLevelReceiver">
        <intent-filter>
            <action android:name="android.intent.action.BATTERY_LOW"/>
            <action android:name="android.intent.action.BATTERY_OKAY"/>
            <action android:name="android.intent.action.POWER_CONNECTED"/>
            <action android:name="android.intent.action.POWER_DISCONNECTED"/>A
        </intent-filter>
    </receiver>
    <activity
            android:name=".MainActivity"
            android:launchMode="singleTop">
        <intent-filter>
            <action android:name="android.intent.action.MAIN"/>
            <category android:name="android.intent.category.LAUNCHER"/>
        </intent-filter>
    </activity>
</application>

而BatteryLevelReceiver本身（包com.wayruha.serviceguard.onduty）：

public class BatteryLevelReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
    Log.w(this.getClass().getName(),intent.getAction());
    Log.w(this.getClass().getName(),"Low level:"+intent.getIntExtra(BatteryManager.EXTRA_LEVEL,-1));
}
}

我可以t receive any of declared events!There are some similar questions here, but none of them helps me. I使用telnet为模拟器设置容量或'ac on / off'。

Answer 1

尝试在清单文件中添加权限：

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