初学Android,电池电量提示(七十五) .

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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

[html]
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<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>

<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>

[java]
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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 { @Override public 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(); } } }

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 {

@Override
public 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

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