App Icon not on desktop

App Icon not on desktop

I have tried everything but when i install my android app from USB. The
shortcut on desktop is not created. Please Help.
Following is my code:
private void createShortcutOnDesktop(Application app) {
Intent shortcutIntent = new Intent();
shortcutIntent.putExtra(Intent.EXTRA_SHORTCUT_INTENT,
app.getIntentShortcut());
shortcutIntent.putExtra(Intent.EXTRA_SHORTCUT_NAME, app.getName());
shortcutIntent.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE,
Intent.ShortcutIconResource.fromContext(context,
R.drawable.home_button));
shortcutIntent.setAction("com.android.launcher.action.INSTALL_SHORTCUT");
this.sendBroadcast(shortcutIntent);
finish();
}