Android Utils

Android Utils

AndroidUtils.java

public final class AndroidUtils {
	
	private AndroidUtils() {}
	
	public static void writeRawResourceToFile(Context context, int resourceId, String directory, String filename) {
		// open raw resouce is taken from 'src/BUILD_TYPE/res/raw' where BUILD_TYPE is usually main
		InputStream indexFileInputStream = context.getResources().openRawResource(resourceId);
		
		//create a file with the directory and filename
		File file = new File(directory, filename);
		
		// use Java Utils to copy the stream to the file.	https://gist.github.com/joeyjiron06/79ee6057780ffc0b681f
		Utils.copyInputStreamToFile(indexFileInputStream, file);
	}

	public static void setBackgroundResource(View view, int resourceId) {
		view.setBackgroundResource(resourceId);
		
		// fix padding issue
		if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
			int paddingBottom = view.getPaddingBottom();
			int paddingTop = view.getPaddingTop();
			int paddingRight = view.getPaddingRight();
			int paddingLeft = view.getPaddingLeft();
			view.setPadding(paddingLeft, paddingTop, paddingRight, paddingBottom);
		}
	}
	
	public static void hideKeyboard(Activity activity) {
		// hide keyboard
		View view = activity.getCurrentFocus();
		if (view != null) {
			hideKeyboard(view);
		}
	}
	
	public static void hideKeyboard(View view) {
		InputMethodManager imm = (InputMethodManager)view.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
		imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
	}
	
	private float sp2px(float px) {
		return TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, px, getContext().getResources().getDisplayMetrics());
	}

	private float dp2px(float px) {
		Resources r = getContext().getResources();
		return TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, px, r.getDisplayMetrics());
	}
}