最近在开发一个与GPS相关的项目，因为其中涉及到了GPS的使用，众所周知，GPS是相当耗电的，因此就想着怎么能知道当前的电量，并且在电量达到一个下限的时候，及时提醒给用户，以根据情况关闭GPS，节省电量，以备电话急用，后来查资料，看API，终于找到了方法，怎么来监视电量，根据电量的变化来获取当前的电量多少，并且根据其它状态综合对手机进行管理，以达到管理最优的状态。
下面是代码：
privateBroadcastReceiver mBatInfoReceiver=newBroadcastReceiver() {
intintLevel=0;
intintScale=0;
publicvoidonReceive(Context context, Intent intent) {
String action=intent.getAction();
/*
* 如果捕捉到的action是ACTION_BATTERY_CHANGED， 就运行onBatteryInfoReceiver()
*/
if(Intent.ACTION_BATTERY_CHANGED.equals(action)) {
intLevel=intent.getIntExtra("level",0);
intScale=intent.getIntExtra("scale",100);
//电池伏数
Log.d("Battery V",""+intent.getIntExtra("voltage",0));
//电池温度
Log.d("Battery T",""+intent.getIntExtra("temperature",0));
BatteryV="当前电压为："+intent.getIntExtra("voltage",0);
BatteryT="当前温度为："+intent.getIntExtra("temperature",0);
switch(intent.getIntExtra("status",
BatteryManager.BATTERY_STATUS_UNKNOWN)) {
caseBatteryManager.BATTERY_STATUS_CHARGING:
BatteryStatus="充电状态";
break;
caseBatteryManager.BATTERY_STATUS_DISCHARGING:
BatteryStatus="放电状态";
break;
caseBatteryManager.BATTERY_STATUS_NOT_CHARGING:
BatteryStatus="未充电";
break;
caseBatteryManager.BATTERY_STATUS_FULL:
BatteryStatus="充满电";
break;
caseBatteryManager.BATTERY_STATUS_UNKNOWN:
BatteryStatus="未知道状态";
break;
}
switch(intent.getIntExtra("plugged",
BatteryManager.BATTERY_PLUGGED_AC)) {
caseBatteryManager.BATTERY_PLUGGED_AC:
BatteryStatus2="AC充电";
break;
caseBatteryManager.BATTERY_PLUGGED_USB:
BatteryStatus2="USB充电";
break;
}
switch(intent.getIntExtra("health",
BatteryManager.BATTERY_HEALTH_UNKNOWN)) {
caseBatteryManager.BATTERY_HEALTH_UNKNOWN:
BatteryTemp="未知错误";
break;
caseBatteryManager.BATTERY_HEALTH_GOOD:
BatteryTemp="状态良好";
break;
caseBatteryManager.BATTERY_HEALTH_DEAD:
BatteryTemp="电池没有电";
break;
caseBatteryManager.BATTERY_HEALTH_OVER_VOLTAGE:
BatteryTemp="电池电压过高";
break;
caseBatteryManager.BATTERY_HEALTH_OVERHEAT:
BatteryTemp="电池过热";
break;
}
}
}
};
这些信息就是监听广播，根据广播的信息进行判断，如果是电量变化的广播，那么就根据这些信息，更新数据，从而进行分析！
