(1)给TextView设置渐变色

private void setTextViewStyles(TextView textView) {

        LinearGradient mLinearGradient = new LinearGradient(0, 0, textView.getPaint().getTextSize()* textView.getText().length(), 0, Color.parseColor("#FFFF68FF"), Color.parseColor("#FFFED732"), Shader.TileMode.CLAMP);

        textView.getPaint().setShader(mLinearGradient);

        textView.invalidate();

    }