我怎样才能检测的Andr​​oid 4.2 USB连接？ [英] How can I detect usb connection in Android 4.2?

问题描述

我用 ACTION_MEDIA_MOUNTED 和 ACTION_MEDIA_UNMOUNTED 来检测 USB 在的Nexus 4连接，但我不能接收任何广播信号。

I used ACTION_MEDIA_MOUNTED and ACTION_MEDIA_UNMOUNTED to detect USB connection on Nexus 4, but I cannot receive any broadcast signal.

下面是我的广播接收器code：

Here is my broadcast receiver code:

IntentFilter filter = new IntentFilter();
filter.addAction(Intent.ACTION_MEDIA_MOUNTED);
filter.addAction(Intent.ACTION_MEDIA_UNMOUNTED);
filter.addDataScheme("file");

debugReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        final String action = intent.getAction();
        if (Intent.ACTION_MEDIA_MOUNTED.equals(action)) {
            debugOn = true;
        } else if (Intent.ACTION_MEDIA_UNMOUNTED.equals(action)) {
            debugOn = false;
        }
    }
};
registerReceiver(debugReceiver, filter);

任何想法？我还搜查他人的问题;他们说，如果我想补充

Any ideas? I also searched others questions; they said if I add

filter.addDataScheme（文件）;

我会得到信号，但我已经尝试过，并没有得到任何

I will get the signal, but I have tried and nothing was received.

推荐答案

使用 UsbManager.ACTION_USB_DEVICE_ATTACHED 和 UsbManager.ACTION_USB_DEVICE_DETACHED 你的意图过滤器。

Use UsbManager.ACTION_USB_DEVICE_ATTACHED and UsbManager.ACTION_USB_DEVICE_DETACHED for your intent filter.

要检查连接PC使用 Intent.ACTION_BATTERY_CHANGED 和的onReceive intent.getInt （BatteryManager.EXTRA_PLUGGED），看看值为 BatteryManager.BATTERY_PLUGGED_USB 。

To check for connection to PC use Intent.ACTION_BATTERY_CHANGED and onReceive intent.getInt(BatteryManager.EXTRA_PLUGGED) and see if the value is BatteryManager.BATTERY_PLUGGED_USB.

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