广播接收器-监视电池电量和充电状态 [英] Broadcast receiver - monitoring the Battery Level and Charging State

问题描述

我正在尝试进行两次祝酒：一次在设备充电时，一次在不充电时。
但是接收方表现得很疯狂，发送了很多吐司，并使应用程序崩溃了。
我找不到问题。
thnx！
这是主要活动中的接收方：

I am trying to make two toasts: one when the device is charging, and one when it`s not. But the receiver acting crazy, sending many toasts, and crashing the app. I can not find the problem. thnx! This is the receiver in Main activity:

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;
        if (isCharging){
            Toast.makeText(context, "The device is charging", Toast.LENGTH_SHORT).show();
        }else{
            Toast.makeText(context, "The device is not charging", Toast.LENGTH_SHORT).show();

        }

    }
}

这是清单：

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

推荐答案

我找到了一种检查设备是否可用的好方法充电与否。
这是接收器类的代码：

I found a great way to check if the device is charging, or not. Here is the code of the receiver class:

public class PowerConnectionReceiver extends BroadcastReceiver {

    public PowerConnectionReceiver() {
    }

    @Override
    public void onReceive(Context context, Intent intent) {

        if (intent.getAction().equals(Intent.ACTION_POWER_CONNECTED)) {
            Toast.makeText(context, "The device is charging", Toast.LENGTH_SHORT).show();
        } else {
            intent.getAction().equals(Intent.ACTION_POWER_DISCONNECTED);
            Toast.makeText(context, "The device is not charging", Toast.LENGTH_SHORT).show();
        }
    }


}

在onResume上注册：

Registering it on onResume:

receiver = new PowerConnectionReceiver();

    IntentFilter ifilter = new IntentFilter();
    ifilter.addAction(Intent.ACTION_POWER_CONNECTED);
    ifilter.addAction(Intent.ACTION_POWER_DISCONNECTED);
    registerReceiver(receiver, ifilter);

在onPause上未注册：

Unregistered on onPause:

        unregisterReceiver(receiver);

工作正常！

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