Android how to handle button names in array

Question

I have a couple of buttons like

font1 = (Button)findViewById(R.id.fontsize1);
font2 = (Button)findViewById(R.id.fontsize2);

When I click on a button I want to change its textcolor and also change the textcolor of the rest of the buttons. Of course I do not want to write many lines best practice is a loop.

    font1.setOnClickListener(new View.OnClickListener(){
        public void onClick(View v) {
            SaveFontSize("fontsize", "font1");
            font1.setTextColor(Color.parseColor(color_active));
            font1.setBackgroundResource(R.drawable.fonturesgreen);
            }
        }

        });

I created a list:

List<String> fontarray = Arrays.asList("font1", "font2", "font3", "font4", "font5");

And in the loop I tried to do this:

  for (int i=0; i<5; i++) {
    fontarray.get(i).setTextColor(Color.parseColor(color_active));
    }

This gives me an error, since fontarray.get(i) is a String, not a button.

fardjad · Accepted Answer · 2012-03-03 22:32:25Z

1

you can actually iterate through controls in your layout, find buttons and compare their names (or other attributes you want) with the values stored in your List<String>:

LinearLayout yourLayout = (LinearLayout) findViewById(R.layout.yourLayout);

for (int i = 0; i < yourLayout.getChildCount(); i++) {
    Object block = yourLayout.getChildAt(i);
    if (block instanceof Button) {
        Button btn = (Button)block;
        // do something with the button
    }
}

answered Mar 3, 2012 at 22:32

fardjad

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Comments

MByD · Accepted Answer · 2012-03-03 22:26:15Z

0

Create a list of buttons as a class member instead:

List<Button> buttonArray = new ArrayList<Button>();

And in the onCreate():

buttonArray.add((Button)findViewById(R.id.fontsize1));
// same for the rest

now you can access it like that:

for (int i=0; i < buttonArray.length(); i++) {
    buttonArray.get(i).setTextColor(Color.parseColor(color_active));
}

answered Mar 3, 2012 at 22:26

MByD

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Comments

Roman Minenok · Accepted Answer · 2012-03-03 22:26:48Z

0

You should do it this way:

List<Button> fontarray = Arrays.asList(font1, font2, font3, font4, font5);

answered Mar 3, 2012 at 22:26

Roman Minenok

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