Draw arc on canvas, canvas.drawArc()

To drawa arc on canvas, call canvas.drawArc():
drawArc(RectF oval, float startAngle, float sweepAngle, boolean useCenter, Paint paint)

where:

• oval - The bounds of oval used to define the shape and size of the arc
• startAngle - Starting angle (in degrees) where the arc begins
• sweepAngle - Sweep angle (in degrees) measured clockwise
• useCenter - If true, include the center of the oval in the arc, and close it if it is being stroked. This will draw a wedge
• paint - The paint used to draw the arc

Create a new class MyView extends View. Override the onDraw(Canvas canvas) method to draw arc 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 oval = new RectF();
  paint.setStyle(Paint.Style.STROKE);
  /*
   * drawArc(RectF oval, float startAngle, float sweepAngle, boolean useCenter, Paint paint)
   *
   * oval - The bounds of oval used to define the shape and size of the arc
   * startAngle - Starting angle (in degrees) where the arc begins
   * sweepAngle - Sweep angle (in degrees) measured clockwise
   * useCenter - If true, include the center of the oval in the arc, and close it if it is being stroked. This will draw a wedge
   * paint - The paint used to draw the arc
   */
  oval.set(50, 50, 150, 150);
  canvas.drawArc(oval, 0, 45, true, paint);
  
  oval.set(200, 150, 450, 350);
  canvas.drawArc(oval, 0, 270, true, paint);
  
  oval.set(200, 400, 450, 600);
  canvas.drawArc(oval, 0, 270, false, 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));
}
}

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