在AndroidManifest.xml 里 加入：(tools...不加的话，会有红线)

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

...

<receiver android:name=".BootCompleteReceiver" android:exported="true">
    <intent-filter>
        <action android:name="android.intent.action.BATTERY_CHANGED"/>
    </intent-filter>
</receiver>

新建一个类： BatteryChangeReveiver extends BroadcastReceiver:

public class BatteryChangeReveiver extends BroadcastReceiver {
 private static final String TAG = "BootCompleteReceiver";
@Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        Log.d(TAG, "action is "  + action);
}
}

哪里出错了？