一对一视频app源码，Android 绘制渐变色

一对一视频app源码，Android 绘制渐变色实现的相关代码
一. 在xml文件中绘制
startColor:渐变色起始颜色

endColor:渐变色结束颜色

angle:绘制角度

代码：

```handlebars
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<gradient
android:startColor="@color/colorStart"
android:angle="-45"
android:endColor="@color/colorEnd"/>
<size
android:width="@dimen/color_size"
android:height="@dimen/color_size"/>
<corners
android:radius="@dimen/radius"/>
</shape>
```

二.在代码中绘制
重写ondraw方法，使用LinearGradient绘制渐变View

```handlebars
override fun onDraw(canvas: Canvas?) {
if (mStartColor == null || mEndColor == null) {
return
}
val w: Float = measuredWidth.toFloat()
val h: Float = measuredHeight.toFloat()
val linearGradient =
LinearGradient(0f, 0f, w, h, mStartColor!!, mEndColor!!, Shader.TileMode.CLAMP)
val rectF = RectF(0f, 0f, w, h)
mPaint.shader = linearGradient
//角度从（0，0）到（w,h)的渐变色
canvas?.drawRoundRect(rectF, mRectRadius, mRectRadius, mPaint);
}
```

三.绘制一组渐变色
把起始颜色和结束颜色定义在xml中：

```handlebars
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string-array name="gradient_start">
<item>#2ae0c8 </item>
<item>#a2e1d4</item>
<item>#acf6ef</item>
<item>#cbf5fb</item>
<item>#bdf3d4</item>
<item>#e6e2c3</item>
<item>#e3c887</item>
<item>#fad8be</item>
<item>#fbb8ac</item>
<item>#fe6673</item>
<item>#2ae0c8 </item>
<item>#a2e1d4</item>
<item>#acf6ef</item>
<item>#cbf5fb</item>
<item>#bdf3d4</item>
<item>#e6e2c3</item>
<item>#e3c887</item>
<item>#fad8be</item>
<item>#fbb8ac</item>
<item>#fe6673</item>
</string-array>
<string-array name="gradient_end">
<item>#e3c887</item>
<item>#fad8be</item>
<item>#e3c887</item>
<item>#fad8be</item>
<item>#fe6673</item>
<item>#acf6ef</item>
<item>#EE8EBE</item>
<item>#a2e1d4</item>
<item>#acf6ef</item>
<item>#cbf5fb</item>
<item>#e3c887</item>
<item>#fad8be</item>
<item>#e3c887</item>
<item>#fad8be</item>
<item>#fe6673</item>
<item>#acf6ef</item>
<item>#EE8EBE</item>
<item>#a2e1d4</item>
<item>#acf6ef</item>
<item>#cbf5fb</item>
</string-array>
</resources>
```

自定义一个布局，在布局中添加绘制的渐变色方块：

```handlebars
private fun initColor() {
val startColor = resources.getStringArray(R.array.gradient_start)
val endColor = resources.getStringArray(R.array.gradient_end)
for (i in startColor.indices) {
val view = getView(Color.parseColor(startColor[i]), Color.parseColor(endColor[i]))
addView(view)
}
}
```

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标签：e3c887,val,渐变色,app,fad8be,源码,acf6ef,绘制
来源： https://www.cnblogs.com/yunbaomengnan/p/15070304.html