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);//设置为空心
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);//绘画基点
path1.lineTo(70, 410);
path1.lineTo(55, 350);
path1.lineTo(25, 350);
path1.close();//把开始的点和最后的点连接在一起，构成一个封闭图形
/*
* 最重要的就是movtTo和close,如果是Style.FILL的话，不设置close,也没有区别，可是如果是STROKE模式，
* 如果不设置close,图形不封闭。
*
* 当然，你也可以不设置close，再添加一条线，效果一样。
*/
canvas.drawPath(path1, paint);
///////////////////////////////////////第二列
paint.setColor(Color.BLUE);
paint.setStyle(Paint.Style.FILL);//设置实心
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);
* 参数一为渐变起初点坐标x位置，参数二为y轴位置，参数三和四分辨对应渐变终点
* 其中参数new int[]{startColor, midleColor,endColor}是参与渐变效果的颜色集合，
* 其中参数new float[]{0 , 0.5f, 1.0f}是定义每个颜色处于的渐变相对位置， 这个参数可以为null，如果为null表示所有的颜色按顺序均匀的分布
*/
Shader mShader = new LinearGradient(0, 0, 100, 100,
new int[] { Color.RED, Color.GREEN, Color.BLUE, Color.YELLOW },
null, Shader.TileMode.REPEAT);
// Shader.TileMode三种模式
// REPEAT:沿着渐变方向循环重复
// CLAMP:如果在预先定义的范围外画的话，就重复边界的颜色
// MIRROR:与REPEAT一样都是循环重复，但这个会对称重复
paint.setShader(mShader);// 用Shader中定义定义的颜色来话
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("圆形", 240, 50, paint);
canvas.drawText("正方形", 240, 120, paint);
canvas.drawText("长方形", 240, 190, paint);
canvas.drawText("椭圆形", 240, 250, paint);
canvas.drawText("三角形", 240, 320, paint);
canvas.drawText("梯形", 240, 390, paint);
}
}
