从电池经理意图获取默认值

Question

我正在试图监视我的电池状态，但我一直从侦听器获取默认值，这是我的接收类：

public class BatteryIndicatorListener extends BroadcastReceiver{

@Override
public void onReceive(Context context, Intent intent) {

    Log.d("battery status", "changed");

    int status = intent.getIntExtra(BatteryManager.EXTRA_STATUS, -1);
    boolean isCharging = status == BatteryManager.BATTERY_STATUS_CHARGING ||   status == BatteryManager.BATTERY_STATUS_FULL;
    int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
    int scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, -1);

    int chargePlug = intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);
    boolean usbCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_USB;
    boolean acCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_AC;

    Log.d("battery status", "chargeplug: "+chargePlug);
   Log.d("battery status", "status: "+status);
   Log.d("battery status", "is charging: "+isCharging);
   Log.d("battery status", "usb charging: "+usbCharge);
   Log.d("battery status", "ac charging: "+acCharge);
  Log.d("battery status", "level: "+level);
   Log.d("battery status", "scale: "+scale);

下面是我的logcat输出：

03-18 10:44:50.806: D/battery status(7855): changed
03-18 10:44:50.806: D/battery status(7855): chargeplug: -1
03-18 10:44:50.806: D/battery status(7855): status: -1
03-18 10:44:50.806: D/battery status(7855): is charging: false
03-18 10:44:50.806: D/battery status(7855): usb charging: false
03-18 10:44:50.806: D/battery status(7855): ac charging: false
03-18 10:44:50.806: D/battery status(7855): level: -1
03-18 10:44:50.806: D/battery status(7855): scale: -1

我的舱单上有这个：

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



<receiver android:name="com.zivkesten.find_a_place.control.service.BatteryIndicatorListener" >
        <intent-filter>
            <action android:name="android.intent.action.ACTION_POWER_CONNECTED" />
            <action android:name="android.intent.action.ACTION_POWER_DISCONNECTED" />
            <action android:name="android.intent.action.BATTERY_CHANGED"/>
            <action android:name="android.intent.action.BATTERY_LOW"/>
            <action android:name="android.intent.action.BATTERY_OKAY"/>
        </intent-filter>
    </receiver>

我有遗漏什么吗？

Answer 1

尝尝这个。

IntentFilter ifilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
Intent batteryStatus = context.registerReceiver(null, ifilter);

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