当你插入充电器时，android调用什么服务和类

Question

我一直在尝试使用反射以防有人插入充电器或usb电缆为他们的设备充电。有谁能告诉我android是如何与硬件交互的吗?

我对USB不太感兴趣我对红色(HTC是琥珀色)led更感兴趣，当我们连接设备充电或通知时，它会发光。

Answer 1

为ACTION_BATTERY_CHANGED设置BroadcastReceiver。一个Intent extra会告诉你充电状态是什么——详情见BatteryManager。

   <application android:icon="@drawable/icon" android:label="@string/app_name">
        <receiver android:name=".receiver.PlugInControlReceiver">
            <intent-filter>
                <action android:name="android.intent.action.ACTION_POWER_CONNECTED" />
                <action android:name="android.intent.action.ACTION_POWER_DISCONNECTED" />
            </intent-filter>
        </receiver>
    </application>

然后

public void onReceive(Context context , Intent intent) {
    String action = intent.getAction();
    if(action.equals(Intent.ACTION_POWER_CONNECTED)) {
        // Do something when power connected
    }
    else if(action.equals(Intent.ACTION_POWER_DISCONNECTED)) {
        // Do something when power disconnected
    }
}

Answer 2

查看此链接

你可以通过注册意图过滤器来监控电池充电状态

< receiver android:name=".PowerConnectionReceiver">
  <intent-filter>
    <action android:name="android.intent.action.ACTION_POWER_CONNECTED"/>
    <action android:name="android.intent.action.ACTION_POWER_DISCONNECTED"/>
  </intent-filter>
</receiver>

和代码

public class PowerConnectionReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) { 
        int status = intent.getIntExtra(BatteryManager.EXTRA_STATUS, -1);
        boolean isCharging = status == BatteryManager.BATTERY_STATUS_CHARGING ||
                            status == BatteryManager.BATTERY_STATUS_FULL;
    }
}