通过电池状态改变广播
private BroadcastReceiver mBatInfoReceiver=new BroadcastReceiver(){
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (Intent.ACTION_BATTERY_CHANGED.equals(action)) {
BatteryInfoEvent batteryInfoEvent=new BatteryInfoEvent();
//当前电量
int intLevel = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, 0);
int intScale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, 100);
batteryInfoEvent.setBatteryPercent(intLevel * 100 / intScale);
//电池温度
int temperature = intent.getIntExtra(BatteryManager.EXTRA_TEMPERATURE, -1);
float batteryTemperature = temperature / 10;
batteryInfoEvent.setBatteryTemperature(batteryTemperature);
//充电状态
int status = intent.getIntExtra(BatteryManager.EXTRA_STATUS,-1);
String desc="";
switch (status){
// 正充电
case BatteryManager.BATTERY_STATUS_CHARGING:
desc="正在充电";
break;
// 已经充满
case BatteryManager.BATTERY_STATUS_FULL:
desc="已充满";
break;
// 正断开充电
case BatteryManager.BATTERY_STATUS_DISCHARGING:
desc="未充电";
break;
// 没有充电
case BatteryManager.BATTERY_STATUS_NOT_CHARGING:
desc="未充电";
break;
// 未知状态
case BatteryManager.BATTERY_STATUS_UNKNOWN:
desc="未知状态";
break;
case -1:{
desc="获取充电状态失败";
}break;
}
batteryInfoEvent.setChargeStatus(status);
//电池电压
int voltage = intent.getIntExtra(BatteryManager.EXTRA_VOLTAGE, -1);
float batteryVoltage = voltage / 1000f;
BigDecimal bd = new BigDecimal(batteryVoltage);
double value = bd.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue();//保留两位小数
batteryInfoEvent.setBatteryVoltage(value);
//电池健康状态
int health = intent.getIntExtra(BatteryManager.EXTRA_HEALTH, -1);
String batteryHealth = null;
switch(health){
case BatteryManager.BATTERY_HEALTH_DEAD: batteryHealth = "没电";break;
case BatteryManager.BATTERY_HEALTH_GOOD: batteryHealth = "健康";break;
case BatteryManager.BATTERY_HEALTH_OVERHEAT: batteryHealth = "过热";break;
case BatteryManager.BATTERY_HEALTH_COLD: batteryHealth = "过冷";break;
case BatteryManager.BATTERY_HEALTH_OVER_VOLTAGE: batteryHealth = "过电压";break;
case BatteryManager.BATTERY_HEALTH_UNSPECIFIED_FAILURE: batteryHealth = "未知错误";break;
case BatteryManager.BATTERY_HEALTH_UNKNOWN: batteryHealth = "未知";break;
}
batteryInfoEvent.setHealthStatus(health);
batteryInfoEvent.setHealthStatusDesc(batteryHealth);
//电池类型
String technology = intent.getStringExtra(BatteryManager.EXTRA_TECHNOLOGY);
batteryInfoEvent.setTechnology(technology);
//连接电源类型
int plugged = intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);
String pluggedDesc="";
switch (plugged){
case BatteryManager.BATTERY_PLUGGED_AC:{
pluggedDesc="充电器";
}break;
case BatteryManager.BATTERY_PLUGGED_USB:{
pluggedDesc="USB";
}break;
case BatteryManager.BATTERY_PLUGGED_WIRELESS:{
pluggedDesc="无线充电";
}break;
default:{
pluggedDesc="未充电";
}
}
batteryInfoEvent.setPlugged(plugged);
batteryInfoEvent.setPluggedDesc(pluggedDesc);
}
}
};
记得广播的注册与注销
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
registerReceiver(mBatInfoReceiver,new IntentFilter(Intent.ACTION_BATTERY_CHANGED));//注册电池信息变化广播
}
@Override
protected void onDestroy() {
super.onDestroy();
unregisterReceiver(mBatInfoReceiver);//注销电池信息变化广播
}
这样可以拿到系统能提供的电池相关的信息
电池充电状态以及电池瞬时电流之类的也可以通过BatteryManager来获取
BatteryManager batteryManager = (BatteryManager) context.getSystemService(android.content.Context.BATTERY_SERVICE);
// 剩余电量百分比 BATTERY_PROPERTY_CAPACITY: 51
int batteryCapacity =
batteryManager.getIntProperty(BatteryManager.BATTERY_PROPERTY_CAPACITY);
// 当前电池剩余容量(mAH) BATTERY_PROPERTY_CHARGE_COUNTER: 2192080
int batteryChargeCounter =
batteryManager.getIntProperty(BatteryManager.BATTERY_PROPERTY_CHARGE_COUNTER);
// 剩余能量(nWH) BATTERY_PROPERTY_ENERGY_COUNTER: -2147483648
long batteryEnergyCounter =
batteryManager.getIntProperty(BatteryManager.BATTERY_PROPERTY_ENERGY_COUNTER);
// 瞬时电流(mA) BATTERY_PROPERTY_CURRENT_NOW: 632324(负表示放电 正表示充电)
int batteryCurrentNow =
batteryManager.getIntProperty(BatteryManager.BATTERY_PROPERTY_CURRENT_NOW);
// 平均电流(mA) BATTERY_PROPERTY_CURRENT_AVERAGE: -2147483648 (负表示放电 正表示充电)
int batteryCurrentAverage =
batteryManager.getIntProperty(BatteryManager.BATTERY_PROPERTY_CURRENT_AVERAGE);
// 状态(获取电池充电状态需要api>=26)小于26的将获取不到
int status =
batteryManager.getIntProperty(BatteryManager.BATTERY_PROPERTY_STATUS);
这个在网上没有现成的实现方案,像目前市场上的应用 电池医生等等 计算电池剩余使用时间 电池充电充满时间 电池健康度(根据电池容量的损耗来计算) 很多都是假数据。许多厂商会有相应的显示,但是哪些数据是不开放给开发者的,都是系统级别的权限,常规的开发者根本无法获取到。所以,要相对比较准确的计算以上数据,其实是需要应用对电池进行长时间的监测,根据电池使用状态较稳定(即:假设我们要计算电池剩余使用时间,则手机处于一个稳定的使用状态(放电状态稳定)情况下,根据电池每下降1%所用的时间来反推电池剩余电量的使用时间),充电剩余时间同理。