Question

I have identified the width and height of the screen programatically. Now I want to use that width and height in my xml file. Kindly give me a way to achive this.

Here is my Activity class.

 public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        DisplayMetrics display = this.getResources().getDisplayMetrics(); 
        float width = display.widthPixels;
        float height = display.heightPixels;
        Toast.makeText(TestProjectActivity.this, "width and height is: "+width + ": "+height, Toast.LENGTH_LONG).show();

        float w = convertPixelsToDp(width, this);
        float h = convertPixelsToDp(height, this);

        Toast.makeText(TestProjectActivity.this, "DP" +w+":  "+h, Toast.LENGTH_LONG).show();
    }

    public static float convertPixelsToDp(float px,Context context){
        Resources resources = context.getResources();
        DisplayMetrics metrics = resources.getDisplayMetrics();
        float dp = px / (metrics.densityDpi / 160f);
        return dp;
    }

Now I want to send the w and b to the xml for the further work.

Any help would be appricieted?
Thanks.

Answer 1

You cannot pass information back to XML. At most, you can get your widget using findViewById and then programmatically set the widget size.

I am developing the application which runs on any screen device. So the issue with the screen size. If I am setting the width of textview to 200dp, then its ok in my device but on other device,its not getting appear. So I just want a way where I can use this above detected width and height in my XML

You should then use a LinearLayout to give your image a size relative to the available width (like a percentage of the width of the screen

Here is how your XML would look (pseudo code)

LinearLayout (layout_width: match_parent, layout_height: wrap_content)
  ImageView (layout_width: 0dip, layout_height: wrap_content, layout_weight: 50)
  ImageView (layout_width: 0dip, layout_height: wrap_content, layout_weight: 50)

In the above example, each image view will take 50% of the screen width, no matter the number of pixels.

I think you need to Google a good tutorial about layouts in Android.