The method initializeScrollbars(TypedArray) is undefined for the type PLA_AbsLis

The method initializeScrollbars(TypedArray) is undefined for the type PLA_AbsListView

这个错误，很多人认为是  API版本太低，initializeScrollbars这个函数没有办法用，

真正的解决方法是采用：反射的机制来搞定，因为，我们知道方法名，方法的参数，所以就可以这样做，

        final TypedArray a = context.getTheme().obtainStyledAttributes(new int[0]);
        try {
            // initializeScrollbars(TypedArray)
            Method initializeScrollbars = android.view.View.class.getDeclaredMethod("initializeScrollbars", TypedArray.class);
            initializeScrollbars.invoke(this, a);
        } catch (Exception e) {
            e.printStackTrace();
        }

这种方法是最有效果的，

 

一般这种错误是出现在自定义的view中的构造函数里面。




Use reflection to invoke initializeScrollbars() in your custom view's constructor. This could fail in future API versions if the method initializeScrollbars() is actually removed or renamed. For example:

In your custom view (e.g. MyCustomView.java):

public MyCustomView(Context context) {
    super(context);

    // Need to manually call initializedScrollbars() if instantiating view programmatically
    final TypedArray a = context.getTheme().obtainStyledAttributes(new int[0]);
    try {
        // initializeScrollbars(TypedArray)
        Method initializeScrollbars = android.view.View.class.getDeclaredMethod("initializeScrollbars", TypedArray.class);
        initializeScrollbars.invoke(this, a);
    } catch (NoSuchMethodException | InvocationTargetException | IllegalAccessException e) {
        e.printStackTrace();
    }
    a.recycle();
}