膨胀图层 - 在android中的形状列表

Question

I have the following file in my drawable folder called /drawable/mybkg.xml . I want to inflate it so I can change the colors programmatically. Is that possible in Android?

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

    <item>
        <shape android:shape="oval" >
            <padding
                android:top="5dp"
                android:bottom="2dp"
                android:left="2dp"
                android:right="2dp" />

            <solid
                android:angle="270"
                android:color="#1bd4f6" />

            <stroke
                android:width="2dp"
                android:color="#121ce5" />
        </shape>
    </item>

    <!-- Foreground -->
    <item>
        <shape android:shape="oval" >

            <solid android:color="#1b90f6" />
        </shape>
    </item>

</layer-list>

I just now saw a class called LayerDrawable . Does anyone know how I could convert my xml file into such a LayerDrawable either by writing the code or inflating the existing xml?

Answer 1

You should use the Resources.getDrawable(int id) method. Here is the documentation: http://developer.android.com/reference/android/content/res/Resources.html#getDrawable(int) It inflates any kind of drawable resource. The only thing that is left for you to do is to cast the returned drawable to the most specific type that you need (in your case to LayerDrawable ). Here is an example:

// calling from Activity
LayerDrawable d = (LayerDrawable) getResources().getDrawable(R.drawable.my_drawable);