how to set onClick method with linearLayout?

LinearLayout app_layer = (LinearLayout) findViewById (R.id.main_activity_app_layer);
app_layer.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        Toast.makeText(this, "hello", Toast.LENGTH_LONG).show();
    }
});

set LinearLayout attribute android:clickable="true"
if you have any button or textview in layout set android:clickable="false" for all of them

below line is ur code:-

menu_photos.setOnClickListener(new OnClickListener() { 

replace this line to below code:-

menu_photos.setOnClickListener(new View.OnClickListener() {