java - Android USB 连接状态；

Question

我想在使用 WIFI 网络连接的 SQL SERVER 和 SQLite.ITs 之间进行复制。

我的问题是:网络优先 USB(连接到 PC)、GPRS、WIFI。这是优先顺序。 Wifi 和 GPRS 都可以。 USB 是个问题。我如何识别连接到 PC 的 Android 设备。

   public class DownlaodTableActivity extends Activity{
        private int networkType;
        private int signalStrengthInt;
        private SignalStrength signalStrength;
        private TelephonyManager telephonyInfo;
           static boolean usbStatus = false;

       public static BroadcastReceiver mReceiver1  = new BroadcastReceiver() {
       public void onReceive(Context context, Intent intent) {

        Toast.makeText(context, context.toString(),Toast.LENGTH_LONG).show();
        String action = intent.getAction();
        if (action.equals(Intent.ACTION_MEDIA_MOUNTED)) {
            Toast.makeText(context, "SD Card mounted",Toast.LENGTH_LONG).show();

        } else if (action.equals(Intent.ACTION_MEDIA_UNMOUNTED)) {
            Toast.makeText(context, "SD Card unmounted",Toast.LENGTH_LONG).show();

        } else if (action.equals(Intent.ACTION_MEDIA_SCANNER_STARTED)) {
            Toast.makeText(context, "SD Card scanner started",Toast.LENGTH_LONG).show();

        } else if (action.equals(Intent.ACTION_MEDIA_SCANNER_FINISHED)) {
            Toast.makeText(context, "SD Card scanner finished",Toast.LENGTH_LONG).show();

        } else if (action.equals(Intent.ACTION_MEDIA_EJECT)) {
            Toast.makeText(context, "SD Card eject",Toast.LENGTH_LONG).show();

        } else if(action.equals(Intent.ACTION_UMS_CONNECTED)){
            Toast.makeText(context, "connected",Toast.LENGTH_LONG).show();
            usbStatus =true;
        } else if(action.equals(Intent.ACTION_UMS_DISCONNECTED)) {
            Toast.makeText(context, "disconnected",Toast.LENGTH_LONG).show();
            usbStatus =false;
        }

        if(UsbManager.ACTION_USB_ACCESSORY_ATTACHED.equals(action)) {
                usbStatus =true;
        }else{
                usbStatus =false;
        }

        int level = intent.getIntExtra("level", 0);
        Toast.makeText(context, "Battery Level is :"+level+" Please plugin charger!!!",Toast.LENGTH_LONG).show();


        context.unregisterReceiver(this);
        int rawlevel = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
        int scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, -1);
        int levels = -1;
        if (rawlevel >= 0 && scale > 0) {
            levels = (rawlevel * 100) / scale;
        }
        Toast.makeText(context, "Battery Level Remaining:"+levels+" %",Toast.LENGTH_LONG).show();
    }

};
    manager = (ConnectivityManager) getSystemService(DownlaodTableActivity.CONNECTIVITY_SERVICE);
    is3g = manager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).isConnected();
    isWifi = manager.getNetworkInfo(ConnectivityManager.TYPE_WIFI).isConnected();

      telephonyInfo = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
     telephonyInfo.listen(phoneState,PhoneStateListener.LISTEN_SIGNAL_STRENGTH);
     networkType = telephonyInfo.getNetworkType();

      if (usbStatus) {................}
      else if (isWifi||is3g) { ................}
    else if(networkType==TelephonyManager.NETWORK_TYPE_EDGE) {   ...........}

还有我的 list 文件:

     <receiver android:name=".admin.mReceiver1">
            <intent-filter>
                 <action android:name="android.intent.action.ums_connected" />
                 <action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" />
                <action android:name="android.hardware.usb.action.USB_DEVICE_DETACHED" />
            </intent-filter>

            <meta-data android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" android:resource="@xml/device_filter" />
            <meta-data android:name="android.hardware.usb.action.USB_DEVICE_DETACHED"  android:resource="@xml/device_filter" />

    </receiver> 

我也试过这种方法... http://pastie.org/3019828

请告诉我为什么它没有使用 USBSttaus =true; 我在 PC 上连接了 Android。但它仍然显示 usb device sttached status is false。

请帮忙解决这个问题。

提前致谢；

Answer 1

我认为您错误地在 list 文件中声明了您的接收者。

应该是这样的

<receiver android:name=".IntentReceiver">
  <intent-filter>
      <action android:name="android.intent.action.UMS_CONNECTED" />
 </intent-filter>
</receiver>

请在此处查看有关在 This Page 的最后一篇文章中启动 USB 连接服务的完整源代码