How to programmatically set the width of the LinearLayout or ImageView or RelativeLayout?

First of all get the device screen width:

Display display = getWindowManager().getDefaultDisplay();

Point size = new Point();

try {

    display.getRealSize(size);

} catch (NoSuchMethodError err) {

    display.getSize(size);

}

int width = size.x;

int height = size.y;

now just create a LayoutParams and set it to the Text:

LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams((int)(width/3),

                    LinearLayout.LayoutParams.WRAP_CONTENT);  

mMainLinearLayout.setLayoutParams(lp);

// OR

mProfileImage.setLayoutParams(lp);

//OR

RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams((int)(width/3),

                    LinearLayout.LayoutParams.WRAP_CONTENT);  

mLoginRelativeLayout.setLayoutParams(lp);

as same for all other layouts
which is provide according to screen size of device .