AndroidPaint.setSharer渐变色，shape渐变色、shape文件新建步骤、xml旋转，设置四角弯曲度corners

package com.fpt.drawgradview;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.LinearGradient;
import android.graphics.Paint;
import android.graphics.Shader;
import android.graphics.drawable.shapes.Shape;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.view.View;
import android.widget.LinearLayout;

public class DrawGradView extends View {
    private Paint paint;
    public DrawGradView(Context context) {
        super(context);
        initData();
    }

    public DrawGradView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        initData();
    }

    public DrawGradView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        initData();
    }

    public DrawGradView(Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
        initData();
    }
    public void initData(){
        paint=new Paint(Paint.ANTI_ALIAS_FLAG);
        paint.setStyle(Paint.Style.STROKE);
        paint.setStrokeWidth(40);
//        paint.setColor(Color.BLUE);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        canvas.drawLine(100,50,100,400,paint);
        LinearGradient linearGradient=new LinearGradient(150,50,150,300,new int[]{
                Color.rgb(255,189,22),
                Color.rgb(221,43,6),
                Color.rgb(0,25,233),
                Color.rgb(0,232,210)},
        new float[]{0,.3F,.6F,.9F},Shader.TileMode.CLAMP);
        //new float[]{},中的数据表示相对位置，将150,50,150,300，划分10个单位，.3，.6，.9表示它的绝对位置。300到400，将直接画出rgb（0,232,210）
        paint.setShader(linearGradient);
        canvas.drawLine(150,50,150,400,paint);
    }
}

LinearGradient 的3种模式：

CLAMP：当图片小于绘制尺寸时要进行边界拉伸来填充

REPEAT：当图片小于绘制尺寸时重复平铺

MIRROR：当图片小于绘制尺寸时镜像平铺

新建shape文件步骤如下：

1、在model层，鼠标右击，选择new------>resource；
2、如下图，资源选择drawable，然后element（元素的意思）中打出一个“s”，就有提示的shape了，选择、新建之;

旋转