android RadioButton button drawable gravity

Question

I am generating RadioButtons dynamically with

RadioButton radioButton=new RadioButton(context);  

LayoutParams layoutParams=new LayoutParams(radioWidth,rad         


        

Answer 1

Based on @Reprator answers.

JAVA version:

public class RadioButtonCentered extends AppCompatRadioButton {

  private Drawable buttonDrawable;


  public RadioButtonCentered(Context context) {
    super(context);
  }

  public RadioButtonCentered(Context context, AttributeSet attrs) {
    super(context, attrs);
  }

  public RadioButtonCentered(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
  }




  @Override
  protected void onDraw(Canvas canvas) {
      if (buttonDrawable != null) {
        int iconHeight = buttonDrawable.getIntrinsicHeight();
        int buttonWidth = buttonDrawable.getIntrinsicWidth();
        int width = getWidth();
        float totalWidth = buttonWidth + getPaint().measureText(getText().toString()) + getPaddingLeft() + getPaddingRight() + getCompoundDrawablePadding();

        if (totalWidth >= width) { super.onDraw(canvas); }
        else {
            int yTop = 0;
            int height = getHeight();
            int availableSpace = (int) ((width - totalWidth) / 2);
            int verticalGravity = getGravity() & Gravity.VERTICAL_GRAVITY_MASK;
            int rightWidth = availableSpace + buttonWidth;

            switch (verticalGravity) {
                case Gravity.BOTTOM:
                    yTop = height - iconHeight;
                    break;
                case Gravity.CENTER_VERTICAL:
                    yTop = (height - iconHeight) / 2;
                    break;
            }

            setButtonDrawable(android.R.color.transparent);
            buttonDrawable.setState(getDrawableState());
            buttonDrawable.setBounds(availableSpace, yTop, rightWidth, yTop + iconHeight);
            buttonDrawable.draw(canvas);

            float yPos = (height / 2 - (getPaint().descent() + getPaint().ascent()) / 2);

            canvas.drawText(getText().toString(), ((float) (rightWidth + getCompoundDrawablePadding())), yPos, getPaint());
        }
    } else {buttonDrawable = CompoundButtonCompat.getButtonDrawable(this); invalidate();}
  }
}