snippet.java

/* Storage access check */
public static boolean isExternalStorageWritable() {
	String state = Environment.getExternalStorageState();
	if (Environment.MEDIA_MOUNTED.equals(state)) return true;
	return false;
}

public static boolean isExternalStorageReadable() {
	String state = Environment.getExternalStorageState();
	if (Environment.MEDIA_MOUNTED.equals(state) || Environment.MEDIA_MOUNTED_READ_ONLY.equals(state)) return true;
	return false;
}

/* Set activity fullscreen, must be call first inside oncreate */	
public static void setFullScreen(Context context) {
	((Activity)context).requestWindowFeature(Window.FEATURE_NO_TITLE);
	((Activity)context).getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); 
}

/* get version integer code from manifest */
public static int getVersionCode(Context context) {
	PackageInfo pi;
	try {
		pi= context.getPackageManager().getPackageInfo(context.getPackageName(), 0);
	} catch(Exception e){ return 1; }
	return pi.versionCode;
}

/* Check if service is running on the background */
public static boolean isServiceRunning(Context context, Class c) { //MyClass.class
	String name = c.getName();
	ActivityManager manager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
	for (ActivityManager.RunningServiceInfo service : manager.getRunningServices(Integer.MAX_VALUE)) {
		if (name.equals(service.service.getClassName())) return true;
	}
	return false;
}

/* Play notification tone */
public static void playNotify(Context context) {
	try {
		Uri notification = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
		Ringtone r = RingtoneManager.getRingtone(context, notification);
		r.play();
	} catch (Exception e) {}
}

/* vibrate */
public static void vibrate(Context context) {
	Vibrator vibrator = (Vibrator) context.getSystemService(Context.VIBRATOR_SERVICE);
	vibrator.vibrate(300);
}

/* Volley cancel request, use in stop/pause */
public static void volleyCancelRequest(RequestQueue requestQueue, Object tag) {
	if (tag != null) {
		requestQueue.cancelAll(tag);
	} else { //cancel any request running
		requestQueue.cancelAll(new RequestQueue.RequestFilter() {
			@Override
			public boolean apply(Request<?> request) { return true; }
		});
	}
}

/* layout inflate shortcut */
public static View inflateLayout(Context context, ViewGroup parent, int layoutXml, boolean isAttach) {
	LayoutInflater inflater = LayoutInflater.from(context);
	if (parent == null) return (View) inflater.inflate(layoutXml, null);
	return (View) inflater.inflate(layoutXml, parent, isAttach);
}

/* get child views of a viewgroup */
public static List<View> getChildViews(ViewGroup parent) {
	List<View> views = new ArrayList<View>();
	final int childCount = parent.getChildCount();
	for (int i = 0; i < childCount; i++) views.add(parent.getChildAt(i));
	return views;
}

/* get view screenshot */
public static Bitmap getBitmapFromView(View view) {
	boolean willNotCacheDrawing = view.willNotCacheDrawing();
	view.setWillNotCacheDrawing(false); 
	view.setDrawingCacheEnabled(true);
	Bitmap bitmap = view.getDrawingCache().copy(Bitmap.Config.ARGB_8888, false);
	view.destroyDrawingCache();
	view.setDrawingCacheEnabled(false);
	view.setWillNotCacheDrawing(willNotCacheDrawing);    
	return bitmap;
}

/* toggle show/hide keyboard */
public static void toggleKeyboard(Context context, View view, boolean isShow) {
	InputMethodManager imm = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
	if (isShow) {
		imm.showSoftInput(view, InputMethodManager.SHOW_IMPLICIT);
	} else {
		imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
	}
}

/* simulate physical touch on view */
public static void invokeTouch(final View view) {
	(new Handler()).postDelayed(new Runnable() {
            public void run() {
		view.dispatchTouchEvent(MotionEvent.obtain(SystemClock.uptimeMillis(), SystemClock.uptimeMillis(), MotionEvent.ACTION_DOWN , 0, 0, 0));
                view.dispatchTouchEvent(MotionEvent.obtain(SystemClock.uptimeMillis(), SystemClock.uptimeMillis(), MotionEvent.ACTION_UP , 0, 0, 0));
            }
        }, 200);
}