android - How to receive notification from a GridView when it refreshes?

Question

A GridView has BaseAdapter derived class responsible for populating its children. It works fine.

I want to do something when the GridView is refreshed. In other words, I wish there was a method "addOnRefreshListner()".

It needs to accommodate API Level as low as 8 (Froyo).

Answer 1

如果您在自定义适配器中覆盖 BaseAdapter.notifyDataSetChanged() 会怎样？

@Override
public void notifyDataSetChanged() {
    super.notifyDataSetChanged();
    // A change has happened and caused the GridView to refresh
}

Answer 2

notifyDataSetChanged() 是没有 addOnRefreshListener() 的解决方案。

Answer 3

尝试View.OnLayoutChangeListener()为 API 11 或更高版本实现一个。

View myView = findViewById(R.id.my_view);
myView.addOnLayoutChangedListener(new OnLayoutChangeListener() {

@Override
public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom) {

      // Do what you need to do with the height/width since they are now set
    }
});