android 通过监听广播获取电池电量以及插拔状态
时间: 2023-08-09 15:05:25 浏览: 254
android获取电池电量
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可以通过注册广播接收器来监听电池电量和插拔状态的变化。具体实现如下:
1. 在 AndroidManifest.xml 文件中添加如下权限:
```xml
<uses-permission android:name="android.permission.BATTERY_STATS" />
```
2. 创建一个广播接收器 BatteryReceiver,实现电量和插拔状态的监听:
```java
public class BatteryReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
// 获取当前电量
int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, 0);
// 获取电量最大值
int scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, 100);
// 计算电量百分比
int batteryPercent = level * 100 / scale;
// 获取充电状态
int status = intent.getIntExtra(BatteryManager.EXTRA_STATUS, -1);
boolean isCharging = status == BatteryManager.BATTERY_STATUS_CHARGING
|| status == BatteryManager.BATTERY_STATUS_FULL;
// 获取充电方式
int chargePlug = intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);
boolean isUSBCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_USB;
boolean isACCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_AC;
// 处理逻辑
if (isCharging) {
if (isUSBCharge) {
// USB 充电
} else if (isACCharge) {
// 交流电充电
} else {
// 无线充电
}
} else {
// 电池供电
}
}
}
```
3. 在需要监听电量和插拔状态的页面或服务中注册广播接收器:
```java
BatteryReceiver batteryReceiver = new BatteryReceiver();
IntentFilter filter = new IntentFilter();
filter.addAction(Intent.ACTION_BATTERY_CHANGED);
registerReceiver(batteryReceiver, filter);
```
注意:注册广播接收器后一定要记得在对应的生命周期(如 Activity 的 onDestroy() 方法)中取消注册,避免内存泄漏:
```java
unregisterReceiver(batteryReceiver);
```
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