如何检测，当电池的低：Android的？ [英] How to detect when the Battery's low : Android?

问题描述

我要关闭我的应用程序时，该设备的电池电量变低。 我加入了以下codeS的清单。

I want to close my app when the battery level of the device gets low. I have added following codes in manifest.

 <receiver android:name=".BatteryLevelReceiver" 
         <intent-filter>
            <action android:name="android.intent.action.ACTION_BATTERY_LOW" />
            <action android:name="android.intent.action.ACTION_BATTERY_OKAY" />
        </intent-filter>
 </receiver>

和以下code接收器

public class BatteryLevelReceiver extends BroadcastReceiver 
{

    @Override
    public void onReceive(Context context, Intent intent) 
    {
        Toast.makeText(context, "BAttery's dying!!", Toast.LENGTH_LONG).show();
        Log.e("", "BATTERY LOW!!");
    }
}

我正在上emulater的应用程序，并改变使用telnet电池电量。 它改变了电池的水平，但没有表现出任何烤面包或日志。

I am running the app on emulater and changing the battery level using telnet. It changes the battery level but not showing any toast or logs.

我在想什么？ 任何帮助AP preciated！ 谢谢你。

What am I missing?? Any help is appreciated! Thank you.

推荐答案

填写您的接收器，在code，而不是在AndroidManifest文件。

Register your receiver in the code, not in the AndroidManifest file.

registerReceiver(batteryChangeReceiver, new IntentFilter(
    Intent.ACTION_BATTERY_CHANGED)); // register in activity or service

public class BatteryChangeReceiver extends BroadcastReceiver {

    int scale = -1;
    int level = -1;
    int voltage = -1;
    int temp = -1;

    @Override
    public void onReceive(Context context, Intent intent) {
        level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
        scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, -1);
        temp = intent.getIntExtra(BatteryManager.EXTRA_TEMPERATURE, -1);
        voltage = intent.getIntExtra(BatteryManager.EXTRA_VOLTAGE, -1);
    }
}

unregisterReceiver(batteryChangeReceiver);//unregister in the activity or service

还是听与空接收器电池电量。

Or listen to the battery level with null receiver.

Intent BATTERYintent = this.registerReceiver(null, new IntentFilter(
        Intent.ACTION_BATTERY_CHANGED));
int level = BATTERYintent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
Log.v(null, "LEVEL" + level);

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