初学Android,电池电量提示(七十五)

来源：互联网发布：黄晓明杨过知乎编辑：程序博客网时间：2024/04/28 15:11

手机电量发生改变时，系统会对放发送Intent的Action为android.intent.action.BATTERY_CHANGED，这个可以在AndroidManifest.xml中配置

        <receiver android:name="BatteryReceiver" >            <!-- 监听电池电量改变 -->            <intent-filter>                <action android:name="android.intent.action.BATTERY_CHANGED" />            </intent-filter>        </receiver>

package WangLi.Service.MonitorBattery;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.os.Bundle;import android.widget.Toast;public class BatteryReceiver extends BroadcastReceiver {@Overridepublic void onReceive(Context context, Intent intent) {Bundle bundle = intent.getExtras();//获取当前电量int current = bundle.getInt("level");//获取总电量　int total = bundle.getInt("scale");//如果当前电量小于总电量的15%if(current * 1.0 / total < 0.15){Toast.makeText(context, "电量过低，请尽快充电", 5000).show();}}}

注意这两行代码的使用

//获取当前电量int current = bundle.getInt("level");//获取总电量　int total = bundle.getInt("scale");