以下是我的LayerList的简化版本。它在一个项目中有一个位图来防止缩放。我想以编程方式更改此位图的drawable。有没有办法做到这一点?更改在LayerListDrawable中可绘制的位图
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:id="@+id/item"
android:left="165dp"
android:top="245dp" >
<bitmap
android:id="@+id/bitmap"
android:src="@drawable/tag_de_01"
android:gravity="top|left" />
</item>
</layer-list>
我尝试没有成功如下:
Resources res = getResources();
LayerDrawable layerDrawable = (LayerDrawable) res.getDrawable(R.drawable.layer_list_drawable);
Drawable newDrawable = (Drawable)res.getDrawable(R.drawable.something);
// works, but scales the image because the drawable of the item is set instead the one of the bitmap
layerDrawable.setDrawableByLayerId(R.id.item, newDrawable);
// doesn't work at all
layerDrawable.setDrawableByLayerId(R.id.bitmap, newDrawable);
我有同样的问题。有人可以帮忙吗? – Lobo 2012-05-06 12:46:20
你能想出答案吗? – 2015-11-09 13:05:51