How can I change background color of all xml pages through three radio buttons

Question

How can I change background color of all xml pages through three radio buttons, one is Red, another is Blue, and other is Green. When I will click onto one of them, then the background color of all XML pages will be changed into that selected color. Pls help me.

Do you mean that you want to change the backgrounds through a preferences(Settings) screen radio buttons — M090009, May 19 '15 at 09:39
you want to change whole theme of app or only the single screen where the three radio buttons are present????? — Amol Sawant, May 19 '15 at 09:40
do it with custom theme set it dynamically by setTheme method. — Jignesh Jain, May 19 '15 at 09:41
I have just created an xml page which contain three radio buttons, namely RED, BLUE, GREEN. — ARIT, May 19 '15 at 09:41
Do you mean to change all your layouts background to change on the radio button click or something ? or you want to change just the current layout where the radio button is ? In either case, on click of any of the radio buttons, save the preference of the color you want to change and on the onResume call for any of the layouts(With Activities), change the color of the background that you have saved in the preference. — mike20132013, May 19 '15 at 09:41

score 2 · Answer 1 · edited May 23 '17 at 12:28

You should findViewById() your root layout and set within the method setBackgroundColor(). And by switching RadioButton you specify different color. See example below.

RelativeLayout rLayout = (RelativeLayout) findViewById(R.layout.the_id);
RadioButton rb = (RadioButton) findViewById(R.id.yourFirstRadioButton);
rb.setOnClickListener(listener);

and then:

OnClickListener listener = new OnClickListener (){
   public void onClick(View v) {
      switch(v.getId()){
      case 0: //assume 0 is red
           rLayout.setBackgroundColor(Color.parseColor(Color.RED));
           break;
      case 1: //assume 1 is blue
           rLayout.setBackgroundColor(Color.parseColor(Color.BLUE));
           break;
       case 2: //assume 2 is green
           rLayout.setBackgroundColor(Color.parseColor(Color.GREEN));
           break;
      }
   }
}

If you want to change layout color in ALL Activities you should remember the value and pass it through Intent or declare static variable with the current color.See examples:

In Activity with RadioButtons:

Intent intent = new Intent(this, NextActivity.class); 
intent.putExtra("color", green);
startActivity(intent);

And in NextActivity you get it like this:

Bundle bundle = getIntent().getExtras();
if(bundle != null){
   switch(bundle.getInt("color")){
   case 0: // 0 was red
         rLayout.setBackgroundColor(Color.RED);
         break;
   case 1: // 1 was blue
         rLayout.setBackgroundColor(Color.BLUE);
         break;
   case 2: // 2 was green
         rLayout.setBackgroundColor(Color.GREEN);
         break;
   }
}

With the static variable I hope you know how to deal, so by switching RadioButton's you assign the value and in another Activity you check the value in switch/case statement as I described above.

Another common way is saving value in SharedPreferences. This is a good practice and it is light-weight, but also depends how many Activities you have. If just 2 - doesn't make sense, if 10 - yes. Nice answer is given here.

That's it. Good luck.

score 0 · Answer 2 · edited May 23 '17 at 12:06

0

do it with custom theme set it dynamically by setTheme() method check below link

set theme dynamically

edited May 23 '17 at 12:06

Community

1
1

answered May 19 '15 at 09:43

Jignesh Jain

1,518
12
28

score 0 · Answer 3 · edited May 19 '15 at 10:20

This is one option:

You can save in SharedPreferences the color you toggled. For example:

Create your SharedPreferences reference:

      SharedPreferences prefs = getActivity().getSharedPreferences(    getActivity().getPackageName(),Context.MODE_PRIVATE);

Then when you select a color (for example blue) do:

     prefs.edit().putInt("TAG", Color.Blue).apply();

Then on any Activity onCreate method (after the setContentView call) or if its a fragment on onViewCreatedMethod you do:

If Activity:

    protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout."layout_id");

    SharedPreferences prefs = getActivity().getSharedPreferences(getActivity().getPackageName(),Context.MODE_PRIVATE);

    int backgroundColor = prefs.edit().getInt("TAG")
    View rootView = findViewById(R.id."layout_id");
    rootView.setBackgroundColor(backgroundColor);

}

if Fragment:

    public void onViewCreated(View view, Bundle savedInstanceState) {

    SharedPreferences prefs = getActivity().getSharedPreferences(getActivity().getPackageName(),Context.MODE_PRIVATE);

    int backgroundColor = prefs.edit().getInt("TAG")
    view.setBackgroundColor(backgroundColor);
    }

This way, when you load a page the color of its background will be changed to the one you've store in preferences.

How can I change background color of all xml pages through three radio buttons

3 Answers3