Apr 8, 2012

Draw circle on canvas, canvas.drawCircle()

Draw circle on canvas, canvas.drawCirclet()

Create a new class MyView extends View. Override the onDraw(Canvas canvas) method to draw circle 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.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(10);
paint.setStyle(Paint.Style.STROKE);

}

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

paint.setStyle(Paint.Style.STROKE);
canvas.drawCircle(50, 50, 30, paint);

paint.setStyle(Paint.Style.FILL);
canvas.drawCircle(300, 300, 200, paint);
//drawCircle(cx, cy, radius, 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));
}
}

2 comments:

  1. i want transparent circle,,hint background contain another color and circle contain another just light color....need help

    ReplyDelete

Infolinks In Text Ads