Question

我想更改进度条的渐变颜色。现在，我可以将其更改为纯色，但我无法将其更改为渐变色。

LayerDrawable progressDrawable = (LayerDrawable) myProgressBar.getProgressDrawable();

// get the color drawable of the progress bar
Drawable primaryColor = progressDrawable.getDrawable(1); 

// set the new color. 
primaryColor.setColorFilter(ContextCompat.getColor(getContext(), R.color.yellow), PorterDuff.Mode.SRC_OVER);

我想改变渐变色而不是纯色。

编辑我的可绘制文件

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">

<item android:id="@android:id/background">
    <shape>
        <corners android:radius="5dip" />
        <gradient
            android:startColor="@color/gray300"
            android:centerColor="@color/gray400"
            android:centerY="0.75"
            android:endColor="@color/gray500"
            android:angle="270"
            />
    </shape>
</item>

<item
    android:id="@+id/progress">
    <clip>
        <shape>
            <corners
                android:radius="5dip" />
            **I want to change this gradient color**
            <gradient 
            android:startColor="#33FF33"
            android:endColor="#008000"
            android:angle="270" />
        </shape>
    </clip>
</item>

</layer-list>

Answer 1

试试这个

GradientDrawable bgShape = (GradientDrawable) myProgressBar.getBackground().getCurrent();
bgShape.setColor(Color.YELLOW);

Answer 2

这是我的实现：绘制一个动画彩虹渐变。很酷，如果我自己这么说的话。它不是基于XML的，但可以做成，并且它确实使用渐变。也许它会给你一些想法。

设定：

 pb = (ProgressBar) findViewById(R.id.progressbar_Horizontal);
GradientDrawable rainbow = new GradientDrawable(Orientation.LEFT_RIGHT,
        new int[] {Color.RED, Color.MAGENTA, Color.BLUE, Color.CYAN, Color.GREEN, Color.YELLOW, Color.RED});

AnimationDrawable ad = getProgressBarAnimation();
pb.setBackgroundDrawable(ad);

动画：

private AnimationDrawable getProgressBarAnimation(){

GradientDrawable rainbow1 = new GradientDrawable(Orientation.LEFT_RIGHT,
        new int[] {Color.RED, Color.MAGENTA, Color.BLUE, Color.CYAN, Color.GREEN, Color.YELLOW});

GradientDrawable rainbow2 = new GradientDrawable(Orientation.LEFT_RIGHT,
        new int[] { Color.YELLOW, Color.RED, Color.MAGENTA, Color.BLUE, Color.CYAN, Color.GREEN});          

GradientDrawable rainbow3 = new GradientDrawable(Orientation.LEFT_RIGHT,
        new int[] { Color.GREEN, Color.YELLOW, Color.RED, Color.MAGENTA, Color.BLUE, Color.CYAN });

GradientDrawable rainbow4 = new GradientDrawable(Orientation.LEFT_RIGHT,
        new int[] { Color.CYAN, Color.GREEN, Color.YELLOW, Color.RED, Color.MAGENTA, Color.BLUE });

GradientDrawable rainbow5 = new GradientDrawable(Orientation.LEFT_RIGHT,
        new int[] { Color.BLUE, Color.CYAN, Color.GREEN, Color.YELLOW, Color.RED, Color.MAGENTA });

GradientDrawable rainbow6 = new GradientDrawable(Orientation.LEFT_RIGHT,
        new int[] {Color.MAGENTA, Color.BLUE, Color.CYAN, Color.GREEN, Color.YELLOW, Color.RED });


GradientDrawable[]  gds = new GradientDrawable[] {rainbow1, rainbow2, rainbow3, rainbow4, rainbow5, rainbow6};

AnimationDrawable animation = new AnimationDrawable();

for (GradientDrawable gd : gds){
    animation.addFrame(gd, 100);

}

animation.setOneShot(false);

return animation;

}

Android改变形状可绘制的颜色

2 个答案: