Is it possible to determine whether an Android device is plugged into a computer or just power?

Question

I was wondering if it was possible to specifically determine if an Android device was plugged into a computer or just power.

The main reason is I\'d like for my phon

Answer 1

First you need to register a receiver to listen to Intent.ACTION_BATTERY_CHANGED and check for the BatteryManager.BATTERY_PLUGGED_USB. Below is the code to do so:

BroadcastReceiver receiver = new BroadcastReceiver() {
    public void onReceive(Context context, Intent intent) {
        int plugged = intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);
        if (plugged == BatteryManager.BATTERY_PLUGGED_USB) {
            Toast.makeText(getApplicationContext(), "Connected to USB, Stay Awake", Toast.LENGTH_LONG).show();
            PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
            PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK, "WakeLock");
            wl.acquire();
        } 
    }
};

// register the receiver to listen to battery change
IntentFilter filter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
registerReceiver(receiver, filter);

You also need the permission in your AndroidManifest.xml to enable staying awake

One other note, at some point you will need to unregister the receiver. You could provide that via settings page to call unregisterReceiver