Android畫圖Path的使用_2

private class MyView2 extends View {

        public MyView2(Context context) {

            super(context);

        }

        @Override
        protected void onDraw(Canvas canvas)

        {

            super.onDraw(canvas);

            canvas.drawColor(Color.WHITE);

            Paint paint = new Paint();

            paint.setAntiAlias(true);

            paint.setColor(Color.RED);

            paint.setStyle(Paint.Style.STROKE);//設置爲空心

            paint.setStrokeWidth(3);

            canvas.drawCircle(40, 40, 30, paint);

            canvas.drawRect(10, 90, 70, 150, paint);

            canvas.drawRect(10, 170, 70, 200, paint);

            canvas.drawOval(new RectF(10, 220, 70, 250), paint);

            Path path = new Path();//三角形

            path.moveTo(10, 330);

            path.lineTo(70, 330);

            path.lineTo(40, 270);

            path.close();

            canvas.drawPath(path, paint);

            Path path1 = new Path();//梯形

            path1.moveTo(10, 410);//繪畫基點

            path1.lineTo(70, 410);

            path1.lineTo(55, 350);

            path1.lineTo(25, 350);

            path1.close();//把開始的點和最後的點連接在一起，構成一個封閉圖形
            /*
             * 最重要的就是movtTo和close,如果是Style.FILL的話，不設置close,也沒有區別，可是如果是STROKE模式，
             * 如果不設置close,圖形不封閉。
             *
             * 當然，你也可以不設置close，再添加一條線，效果一樣。
             */
            canvas.drawPath(path1, paint);
           
           
           
           
            ///////////////////////////////////////第二列

            paint.setColor(Color.BLUE);

            paint.setStyle(Paint.Style.FILL);//設置實心

            canvas.drawCircle(120, 40, 30, paint);

            canvas.drawRect(90, 90, 150, 150, paint);

            canvas.drawRect(90, 170, 150, 200, paint);

            RectF re2 = new RectF(90, 220, 150, 250);

            canvas.drawOval(re2, paint);

            Path path2 = new Path();

            path2.moveTo(90, 330);

            path2.lineTo(150, 330);

            path2.lineTo(120, 270);

            path2.close();

            canvas.drawPath(path2, paint);

            Path path3 = new Path();

            path3.moveTo(90, 410);

            path3.lineTo(150, 410);

            path3.lineTo(135, 350);

            path3.lineTo(105, 350);

            path3.close();

            canvas.drawPath(path3, paint);
           
           
            ////////////////////////////////////////////////////第三列
           
            /*
             * LinearGradient shader = new LinearGradient(0, 0, endX, endY, new
             * int[]{startColor, midleColor, endColor},new float[]{0 , 0.5f,
             * 1.0f}, TileMode.MIRROR);
             * 參數一爲漸變起初點座標x位置，參數二爲y軸位置，參數三和四分辨對應漸變終點
             * 其中參數new int[]{startColor, midleColor,endColor}是參與漸變效果的顏色集合，
             * 其中參數new float[]{0 , 0.5f, 1.0f}是定義每個顏色處於的漸變相對位置， 這個參數可以爲null，如果爲null表示所有的顏色按順序均勻的分佈
             */
            Shader mShader = new LinearGradient(0, 0, 100, 100,

            new int[] { Color.RED, Color.GREEN, Color.BLUE, Color.YELLOW },

            null, Shader.TileMode.REPEAT);

            // Shader.TileMode三種模式

            // REPEAT:沿着漸變方向循環重複

            // CLAMP:如果在預先定義的範圍外畫的話，就重複邊界的顏色

            // MIRROR:與REPEAT一樣都是循環重複，但這個會對稱重複

            paint.setShader(mShader);// 用Shader中定義定義的顏色來話

            canvas.drawCircle(200, 40, 30, paint);

            canvas.drawRect(170, 90, 230, 150, paint);

            canvas.drawRect(170, 170, 230, 200, paint);

            RectF re3 = new RectF(170, 220, 230, 250);

            canvas.drawOval(re3, paint);

            Path path4 = new Path();

            path4.moveTo(170, 330);

            path4.lineTo(230, 330);

            path4.lineTo(200, 270);

            path4.close();

            canvas.drawPath(path4, paint);

            Path path5 = new Path();

            path5.moveTo(170, 410);

            path5.lineTo(230, 410);

            path5.lineTo(215, 350);

            path5.lineTo(185, 350);

            path5.close();

            canvas.drawPath(path5, paint);
           
            //////////////////////////////////第4列

            paint.setTextSize(24);

            canvas.drawText("圓形", 240, 50, paint);

            canvas.drawText("正方形", 240, 120, paint);

            canvas.drawText("長方形", 240, 190, paint);

            canvas.drawText("橢圓形", 240, 250, paint);

            canvas.drawText("三角形", 240, 320, paint);

            canvas.drawText("梯形", 240, 390, paint);

        }

    }