Android onDraw画图记录_android draw 画图

记录1：

	@Override
	protected void onDraw(Canvas canvas) {
		super.onDraw(canvas);
		
        Paint paint = new Paint();  
          
        //去锯齿   
        paint.setAntiAlias(true);  
        //设置眼色
        paint.setColor(Color.BLUE);
        //设置空心
        paint.setStyle(Paint.Style.STROKE);  
        //设置边宽
        paint.setStrokeWidth(3);  
        
          
        RectF rect = new RectF(0,0, 200, 200);
        canvas.drawRoundRect(rect, 10, 10, paint);
        paint.setColor(Color.RED);
        Path path = new Path();
//        path.arcTo(rect,0, 180,true);
        path.quadTo(200, 200, 200, 200);
//        path.close();
//        path.quadTo(99, 99, 99, 2);
//        path.quadTo(99, 99, 2, 99);
        //图案1：
//        path.moveTo(rect.right/2, rect.top);
//        path.quadTo((rect.right-rect.left)/2, (rect.bottom-rect.top)/2, rect.right, (rect.bottom-rect.top)/2);
//        path.quadTo((rect.right-rect.left)/2, (rect.bottom-rect.top)/2, (rect.right-rect.left)/2, rect.bottom);
//        path.quadTo((rect.right-rect.left)/2, (rect.bottom-rect.top)/2, rect.left, (rect.bottom-rect.top)/2);
//        path.quadTo((rect.right-rect.left)/2, (rect.bottom-rect.top)/2, rect.right/2, rect.top);
//        path.lineTo(rect.right, (rect.bottom-rect.top)/2);
//        path.lineTo((rect.right-rect.left)/2, rect.bottom);
//        path.lineTo(rect.left, (rect.bottom-rect.top)/2);
//        path.lineTo(rect.right/2, rect.top);
//----------------------------------------------------------
        
        //图案2：波浪线
//        path.moveTo(0, rect.bottom/2);
//        path.quadTo(rect.right/4, rect.bottom, rect.right/2, rect.bottom/2);
//        path.quadTo(rect.right/4*3, rect.top, rect.right, rect.bottom/2);
        
        //图案3： 梯形
//        path.moveTo(rect.right/2,rect.top);
//        path.lineTo(rect.right/2, rect.bottom);
//        path.lineTo(rect.left,rect.bottom/6*4);
//        path.lineTo(rect.left,rect.bottom/6*2);
//        path.lineTo(rect.right/2,rect.top);
        
        
        
        canvas.drawPath(path, paint);
	}

	@Override
	protected void onDraw(Canvas canvas) {
		super.onDraw(canvas);
		
        Paint paint = new Paint();  
          
        //去锯齿   
        paint.setAntiAlias(true);  
        //设置眼色
        paint.setColor(Color.BLUE);
        //设置空心
        paint.setStyle(Paint.Style.STROKE);  
        //设置边宽
        paint.setStrokeWidth(3);  
        
          
        RectF rect = new RectF(0,0, 200, 200);
        canvas.drawRoundRect(rect, 10, 10, paint);
        paint.setColor(Color.RED);
        Path path = new Path();
 
 
        path.moveTo(rect.width(), rect.height() / 2);
        paint.setColor(Color.YELLOW);
        canvas.drawPath(path, paint);
        path.lineTo((float) (rect.width() * 0.75), (float) (rect.width() / 2 - rect.width() * Math.sqrt(3) / 4));
        paint.setColor(Color.BLUE);
        canvas.drawPath(path, paint);
        path.lineTo((float) (rect.width() * 0.25), (float) (rect.width() / 2 - rect.width()  * Math.sqrt(3) / 4));
        path.lineTo(0, rect.width() / 2);
        paint.setColor(Color.BLACK);
        canvas.drawPath(path, paint);
        path.lineTo((float) (rect.width() * 0.25), (float) (rect.width() / 2 + rect.width()  * Math.sqrt(3) / 4));
        path.lineTo((float) (rect.width() * 0.75), (float) (rect.width() / 2 + rect.width()  * Math.sqrt(3) / 4));
        path.lineTo(rect.width(), rect.height() / 2);
        
        canvas.drawPath(path, paint);
        
        
        canvas.drawPath(path, paint);
        
   
	}

记录3：

	
	@Override
	protected void onDraw(Canvas canvas) {
		super.onDraw(canvas);
		
//把整张画布绘制成白色   
        canvas.drawColor(Color.WHITE);  
        Paint paint = new Paint();  
          
        //去锯齿   
        paint.setAntiAlias(true);  
        //设置颜色
        paint.setColor(Color.BLUE);
        
//---------------画空心图形--------------------
        //设置空心
        paint.setStyle(Paint.Style.STROKE);  
        //设置边宽
        paint.setStrokeWidth(3);  
          
        //绘制圆形   
        canvas.drawCircle(40, 40, 30, paint);  
        //绘制正方形   
        canvas.drawRect(10, 80, 70, 140, paint);  
        //绘制矩形   
        canvas.drawRect(10, 150, 70, 190, paint);  
        
        //绘制圆角矩形   
        RectF re2 = new RectF(10,200,70,230);  
        canvas.drawRoundRect(re2, 15, 15, paint);  
        //绘制椭圆  
        RectF rel = new RectF(10,240,70,270);  
        canvas.drawOval(rel, paint);  
        //定义一个Path对象，封闭一个三角形   
        Path path1 = new Path();  
        path1.moveTo(10, 340);  
        path1.lineTo(70, 340);  
        path1.lineTo(40, 290);  
        path1.close();  
        //根据Path进行绘制，绘制三角形   
        canvas.drawPath(path1, paint);  
          
        //定义一个Path对象，封闭一个五角星   
        Path path2 = new Path();  
        path2.moveTo(27, 360);  
        path2.lineTo(54, 360);  
        path2.lineTo(70, 392);  
        path2.lineTo(40, 420);  
        path2.lineTo(10, 392);  
        path2.close();  
        //根据Path进行绘制，绘制五角星   
        canvas.drawPath(path2, paint);  
        
//--------------画实心图形---------------------------------
        //设置填丛风格后进行绘制   
        //实心
        paint.setStyle(Paint.Style.FILL);  
        paint.setColor(Color.RED);  
        canvas.drawCircle(120, 40, 30, paint);  
        //绘制正方形   
        canvas.drawRect(90, 80, 150, 140, paint);  
        //绘制矩形   
        canvas.drawRect(90, 150, 150, 190, paint);  
          
        //绘制圆角矩形   
        RectF re22 = new RectF(90,200,150,230);  
        canvas.drawRoundRect(re22, 15, 15, paint);  
        //绘制椭圆   
        RectF re21 = new RectF(90, 240, 150, 270);  
        canvas.drawOval(re21, paint);  
          
        Path path3 = new Path();  
        path3.moveTo(90, 340);  
        path3.lineTo(150, 340);  
        path3.lineTo(120, 290);  
        path3.close();  
        //绘制三角形   
        canvas.drawPath(path3,paint);  
          
        //绘制五角形   
        Path path4 = new Path();  
        path4.moveTo(106, 360);  
        path4.lineTo(134, 360);  
        path4.lineTo(150, 392);  
        path4.lineTo(120, 420);  
        path4.lineTo(90, 392);  
        path4.close();  
        canvas.drawPath(path4, paint);  
        
//--------------渐变图形------------------------------    
        //设置渐变器后绘制   
        //为Paint设置渐变器   
        Shader mShasder = new LinearGradient(0, 0, 40, 60, new int[]{Color.RED,Color.GREEN,Color.BLUE,Color.YELLOW}, null, Shader.TileMode.REPEAT);  
        paint.setShader(mShasder);  
        //设置阴影   
        paint.setShadowLayer(45, 10, 10, Color.GRAY);  
        //绘制圆形   
        canvas.drawCircle(200, 40, 30, paint);  
        //绘制正方形   
        canvas.drawRect(170, 80, 230, 140, paint);  
        //绘制矩形   
        canvas.drawRect(170, 150, 230, 190, paint);  
          
        //绘制圆角的矩形   
        RectF re31 = new RectF();  
        canvas.drawRoundRect(re31, 15, 15, paint);  
          
        //绘制椭圆   
        RectF re32 =new RectF();  
        canvas.drawOval(re32, paint);  
          
        //根据Path,绘制三角形   
        Path path5 = new Path();  
        path5.moveTo(170, 340);  
        path5.lineTo(230, 340);  
        path5.lineTo(200, 290);  
        path5.close();  
        canvas.drawPath(path5, paint);  
          
        //根据PAth,进行绘制五角形   
        Path path6 = new Path();  
        path6.moveTo(186, 360);  
        path6.lineTo(214, 360);  
        path6.lineTo(230, 392);  
        path6.lineTo(200, 420);  
        path6.lineTo(170, 392);  
        path6.close();  
        canvas.drawPath(path6, paint);  
		
	}