How can I detect usb connection in Android 4.2?
android, broadcastreceiver, nexus-4
Solution
Use `UsbManager.ACTION_USB_DEVICE_ATTACHED` and `UsbManager.ACTION_USB_DEVICE_DETACHED` for your intent filter.
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`.
Problem
I used `ACTION_MEDIA_MOUNTED` and `ACTION_MEDIA_UNMOUNTED` to detect `USB` connection on `Nexus 4`, but I cannot receive any broadcast signal. 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); ``` Any ideas? I also searched others questions; they said if I add `"filter.addDataScheme("file");"` I will get the signal, but I have tried and nothing was received.