Question

我的应用有一个广播接收器，可以收听ACTION_POWER_CONNECTED的更改，然后标记屏幕以保持开启状态。

我缺少的是应用程序首次运行时检查充电状态的能力。任何人都可以帮我用代码来手动检查充电状态吗？

Answer 1

感谢CommonsWare，这里是我写的代码。

public class Power {
    public static boolean isConnected(Context context) {
        Intent intent = context.registerReceiver(null, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
        int plugged = intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);
        return plugged == BatteryManager.BATTERY_PLUGGED_AC || plugged == BatteryManager.BATTERY_PLUGGED_USB || plugged == BatteryManager.BATTERY_PLUGGED_WIRELESS;
    }
}

if (Power.isConnected(context)) {
    ...
}

或Kotlin版

object Power {
    fun isConnected(context: Context): Boolean {
        val intent = context.registerReceiver(null, IntentFilter(Intent.ACTION_BATTERY_CHANGED))
        val plugged = intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1)
        return plugged == BatteryManager.BATTERY_PLUGGED_AC || plugged == BatteryManager.BATTERY_PLUGGED_USB || plugged == BatteryManager.BATTERY_PLUGGED_WIRELESS
    }
}

http://developer.android.com/training/monitoring-device-state/battery-monitoring.html

Answer 2

public static boolean isPlugged(Context context) {
    boolean isPlugged= false;
    Intent intent = context.registerReceiver(null, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
    int plugged = intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);
    isPlugged = plugged == BatteryManager.BATTERY_PLUGGED_AC || plugged == BatteryManager.BATTERY_PLUGGED_USB;
    if (VERSION.SDK_INT > VERSION_CODES.JELLY_BEAN) {
        isPlugged = isPlugged || plugged == BatteryManager.BATTERY_PLUGGED_WIRELESS;
    }
    return isPlugged;
}

支持无线充电的小更新。

Answer 3

致电registerReceiver(null, new IntentFilter(Intent.ACTION_BATTERY_CHANGED))。这将返回Intent BatteryManager，其Intent.ACTION_BATTERY_CHANGED上已定义额外内容，以告知您是否已插入。

这是有效的，因为{{1}}是一个粘性广播。

Answer 4

在Android M +上，您可以通过BatteryManager使用getSystemService(BATTERY_SERVICE)服务。在运行pre-M的设备上，您可以使用其他人提到的粘性广播。例如：

public static boolean isCharging(Context context) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        BatteryManager batteryManager = (BatteryManager) context.getSystemService(Context.BATTERY_SERVICE);
        return batteryManager.isCharging();
    } else {
        IntentFilter filter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
        Intent intent = context.registerReceiver(null, filter);
        int status = intent.getIntExtra(BatteryManager.EXTRA_STATUS, -1);
        if (status == BatteryManager.BATTERY_STATUS_CHARGING || status == BatteryManager.BATTERY_STATUS_FULL) {
            return true;
        }
    }
    return false;
}

Answer 5

您的答案在android reference！

以下是示例代码：

// Are we charging / charged?
int status = batteryStatus.getIntExtra(BatteryManager.EXTRA_STATUS, -1);
boolean isCharging = status == BatteryManager.BATTERY_STATUS_CHARGING ||
                 status == BatteryManager.BATTERY_STATUS_FULL;

// How are we charging?
int chargePlug = batteryStatus.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);
boolean usbCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_USB;
boolean acCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_AC;

Answer 6

简单的方法是使用意图过滤器ACTION_BATTERY_CHANGED

public void checkBatteryState(View sender) {
    IntentFilter filter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
    Intent batteryStatus = registerReceiver(null, filter);

    int chargeState = batteryStatus.getIntExtra(BatteryManager.EXTRA_STATUS, -1);
    String strState;

    switch (chargeState) {
        case BatteryManager.BATTERY_STATUS_CHARGING:
        case BatteryManager.BATTERY_STATUS_FULL:
            strState = "charging";
            break;
        default:
            strState = "not charging";
    }

    TextView tv = (TextView) findViewById(R.id.textView);
    tv.setText(strState);
}

Answer 7

试试这个：

$(".order-edit").attr("id",message.data.id)

Answer 8

resultData.mat

Answer 9

这是一个棘手的意图，您不需要注册BroadcastReceiver - 只需调用registerReceiver传入null作为接收器，如下一个片段所示，返回当前的电池状态意图。您可以在此处传递实际的BroadcastReceiver对象，但我们将在稍后的部分中处理更新，因此不需要。

IntentFilter ifilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
Intent batteryStatus = context.registerReceiver(null, ifilter);

您可以提取当前的充电状态，如果设备正在充电，还可以通过USB或AC充电器进行充电：

// Are we charging / charged?
int status = batteryStatus.getIntExtra(BatteryManager.EXTRA_STATUS, -1);
boolean isCharging = status == BatteryManager.BATTERY_STATUS_CHARGING ||
                     status == BatteryManager.BATTERY_STATUS_FULL;

// How are we charging?
int chargePlug = batteryStatus.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);
boolean usbCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_USB;
boolean acCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_AC;

当设备连接或断开电源时，BatteryManager会广播操作。即使您的应用未运行，接收这些事件也很重要 - 特别是因为这些事件会影响您启动应用的频率以启动后台更新 - 因此您应该在清单中注册BroadcastReceiver通过在意图过滤器中定义 ACTION_POWER_CONNECTED 和 ACTION_POWER_DISCONNECTED 来收听这两个事件。

<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>

在关联的BroadcastReceiver实现中，您可以按照上一步中的描述提取当前的计费状态和方法。

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;

        int chargePlug = intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);
        boolean usbCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_USB;
        boolean acCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_AC;
    }
}

检查设备是否已插入

9 个答案: