Android代码设置Shape,corners,Gradient

    int strokeWidth = 5; // 3dp 边框宽度
    int roundRadius = 15; // 8dp 圆角半径
    int strokeColor = Color.parseColor("#2E3135");//边框颜色
    int fillColor = Color.parseColor("#DFDFE0");//内部填充颜色

    GradientDrawable gd = new GradientDrawable();//创建drawable
    gd.setColor(fillColor);
    gd.setCornerRadius(roundRadius);
    gd.setStroke(strokeWidth, strokeColor);

if(Build.VERSION.SDK_INT < 16){
	narrowView.setBackgroundDrawable(gd);
}else{
	narrowView.setBackground(gd);
}

但是如果想设置Gradient的渐变色该咋办呢？

方法是改变GradientDrawable的创建方法：

int colors[] = { 0xff255779 , 0xff3e7492, 0xffa6c0cd };//分别为开始颜色，中间夜色，结束颜色

GradientDrawable gd = new GradientDrawable(GradientDrawable.Orientation.TOP_BOTTOM, colors);