How to get all Buttons ID's in one time on Android

Question

I have 16 Buttons in my Activity and I have to initialize those inside onCreate(). Is there any way to initialize all buttons in one single line code?(loops etc.) Code should take all buttons R.id. from XML Layout and process....

Answer 1

Let's say you named your button button_0, button_1, .. button_15. You can do:

for (int i = 0; i < 16; i++) {
    int id = getResources().getIdentifier("button_"+i, "id", getPackageName());
    button[i] = (Button) findViewById(id);
}

Answer 2

Well, if all 16 of those buttons are inside one view or layout, then you could do the following.

ArrayList<View> allButtons; 
allButtons = ((LinearLayout) findViewById(R.id.button_container)).getTouchables();

This assumes that your container (in this example a LinearLayout) contains no Touchable that is not a Button.