On any typical android activity, in which you want to have copy app private files to sdcard, wire the Common.java code to handle the file copying

AnyActivity.java

	private static final int MENU_COPY_FILES = 99;
	
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		getMenuInflater().inflate(R.menu.activity_kid_feed, menu);
		if (BuildConfig.DEBUG) {
			menu.add(Menu.NONE, MENU_COPY_FILES, Menu.NONE, "Copy App Files to sdcard");
		}
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		switch (item.getItemId()) {
		case MENU_COPY_FILES:
			Common.handleCopyFilesToSdCard(App.getContext());
			break;

		default:
			break;
		}
		return super.onOptionsItemSelected(item);
	}