Android onDraw画图记录

记录1：

@Overrideprotected 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);}

记录2：

@Overrideprotected 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：

@Overrideprotected 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);  }