//设置TextView渐变色
public void setTextViewColor(){
    //渐变色
    int[] colors = {
                        Color.parseColor("#E38100"),
                        Color.parseColor("#F1B868"),
                        Color.parseColor("#DA9505"),
                        Color.parseColor("#FDB871"),
                        Color.parseColor("#E57810")
                };
                //渐变位置
                float[] position = {
                        0f,
                        0.2f,
                        0.4f,
                        0.8f,
                        1.0f
                };
                //设置渐变
                LinearGradient mLinearGradient = new LinearGradient(0, 0, title.getPaint().getTextSize() * title.getText().length(), 0, colors, position, Shader.TileMode.CLAMP);
                title.getPaint().setShader(mLinearGradient);
                title.invalidate();
}