Draw round-rect on canvas, drawRoundRect()

drawRoundRect (RectF rect, float rx, float ry, Paint paint)
Draw the specified round-rect using the specified paint. The roundrect will be filled or framed based on the Style in the paint.

• rect - The rectangular bounds of the roundRect to be drawn
• rx - The x-radius of the oval used to round the corners
• ry - The y-radius of the oval used to round the corners
• paint - The paint used to draw the roundRect

Create a new class MyView extends View. Override the onDraw(Canvas canvas) method to draw round-rect on Canvas.

package com.AndroidMyCanvas;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.View;

public class MyView extends View {
 
 Paint paint;
 Path path;

 public MyView(Context context) {
  super(context);
  init();
 }

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

 public MyView(Context context, AttributeSet attrs, int defStyle) {
  super(context, attrs, defStyle);
  init();
 }
 
 private void init(){
  paint = new Paint();
  paint.setColor(Color.BLUE);
  paint.setStrokeWidth(1);
  paint.setStyle(Paint.Style.STROKE);

 }

 @Override
 protected void onDraw(Canvas canvas) {
  // TODO Auto-generated method stub
  super.onDraw(canvas);

  final RectF rect = new RectF();
  paint.setStyle(Paint.Style.STROKE);

  rect.set(50, 50, 150, 150);
  canvas.drawRoundRect(rect, 10, 10, paint);
  
  rect.set(200, 150, 450, 350);
  canvas.drawRoundRect(rect, 30, 30, paint);
  
  paint.setStyle(Paint.Style.FILL);
  rect.set(200, 400, 450, 600);
  canvas.drawRoundRect(rect, 50, 100, paint);

 }

}

Modify main Java activity to setContentView() using our custom View, MyView.

package com.AndroidMyCanvas;

import android.app.Activity;
import android.os.Bundle;

public class AndroidMyCanvasActivity extends Activity {
 /** Called when the activity is first created. */
 @Override
 public void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     setContentView(new MyView(this));
 }
}