如何在SeekBar中创建颜色渐变？ [英] How to make a color gradient in a SeekBar?

问题描述

我想使用一个SeekBar（即旧学校Java Slider）到一个颜色渐变选择器。我看到了一些这样的例子，但他们都需要做新的类等。必须有一种方法来修改或覆盖原始类。或者只是用渐变替换背景。

I want to use a SeekBar (i.e. old school Java Slider) into a color gradient picker. I have seen some examples like this but they all require making new classes and such. There has got to be a way to modify or override the original classes. Or just replace the background with a gradient.

推荐答案

我想这里是你怎么做的。

I figured it out here is how you do it.

您在XML中创建标准的seekbar。

You create a standard seekbar in your XML.

<SeekBar
       android:id="@+id/seekbar_font"
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"
       android:layout_margin="10px"
       android:layout_below="@id/color_font_text"
       android:max="100"
       android:progress="50"></SeekBar>

然后通过创建一个boxShape在你的onCreate（）中自定义seekbar，然后在里面加一个LinearGradient 。

Then you customize the seekbar in your onCreate() by creating a boxShape and then force a LinearGradient inside it.

LinearGradient test = new LinearGradient(0.f, 0.f, 300.f, 0.0f,  

      new int[] { 0xFF000000, 0xFF0000FF, 0xFF00FF00, 0xFF00FFFF,
      0xFFFF0000, 0xFFFF00FF, 0xFFFFFF00, 0xFFFFFFFF}, 
      null, TileMode.CLAMP);
ShapeDrawable shape = new ShapeDrawable(new RectShape());
shape.getPaint().setShader(test);

SeekBar seekBarFont = (SeekBar)findViewById(R.id.seekbar_font);
seekBarFont.setProgressDrawable( (Drawable)shape );

以下是 SeekBar颜色渐变

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