在RippleDrawable中更改StateListDrawable的TintList

Question

作用域

RippleDrawable内部有selector作为item。它起作用了。

<?xml version="1.0" encoding="utf-8"?>
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
    android:color="@color/pink_highlight">        
    <item
        android:id="@android:id/mask"
        android:drawable="@color/pink_highlight" />
    <item 
        android:drawable="@drawable/bg_selectable_item" />
</ripple>

+

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@color/pink_highlight_focus" android:state_focused="true" />
    <item android:drawable="@color/pink_highlight_press" android:state_pressed="true" />
    <item android:drawable="@color/pink_highlight_press" android:state_activated="true" />
    <item android:drawable="@color/pink_highlight_press" android:state_checked="true" />
    <item android:drawable="@android:color/transparent" />
</selector>

问题

无法使用DrawableCompat.setTintList更改选择器的默认状态颜色

RippleDrawable bg = (RippleDrawable) 
ResourcesCompat.getDrawable(context.getResources(), R.drawable.bg_navigation_item, null);
StateListDrawable bgWrap = (StateListDrawable) DrawableCompat.wrap(bg.getDrawable(1));
DrawableCompat.setTintList(bgWrap, new ColorStateList(new int[][]{new int[]{}}, new int[]{Color.WHITE}));
//
someView.setBackground(bg);

它不会改变默认选择器的状态，其他一切都是正常的。

解决方案

出现问题的原因是-误解了着色应该如何工作；- ColorStateList最好是完全加载的；

<ripple xmlns:android="http://schemas.android.com/apk/res/android"
    android:color="@color/pink_highlight">
    <item>
        <shape
            android:shape="rectangle"
            android:tint="@color/selectable_transparent_item" />
    </item>
    <item
        android:id="@android:id/mask"
        android:drawable="@color/pink_highlight" />
</ripple>

+

LayerDrawable bg = (LayerDrawable) ResourcesCompat.getDrawable(context.getResources(), R.drawable.bg_selectable_item, null);
Drawable bgWrap = DrawableCompat.wrap(bg.getDrawable(0));
DrawableCompat.setTintList(bgWrap, context.getResources().getColorStateList(R.color.selectable_white_item));
someView.setBackground(bg);

Answer 1

你试过someView.setBackground(bgWrap)吗？您将tint设置为bgWrap，但您还需要将其设置为背景，而不是您的旧背景。

编辑:你确定setTintList被窃听了吗？下面的代码适用于所有带有AppCompat的API >= 15：

public static void tintWidget(View view, ColorStateList colorStateList) {
    final Drawable originalDrawable = view.getBackground();
    final Drawable wrappedDrawable = DrawableCompat.wrap(originalDrawable);
    DrawableCompat.setTintList(wrappedDrawable, colorStateList);
    view.setBackground(wrappedDrawable);
}

Answer 2

问题172067: DrawableCompat#setTintList在棒棒糖和更高版本上不起作用

https://code.google.com/p/android/issues/detail?id=172067