如何使其他类

Question

当我从另一个不是Activity的Class中调用Dialog时，我想在解除Dialog后取消调用Listview的调用Activity和NotifyDatasetChange适配器。

public class SingleAudioBook extends Activity {
    private ListView lv;
    public void onCreate(Bundle savedInstanceState) {
        lv = (ListView) findViewById(R.id.lvSingleSong);
 lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                    MyDialog.callLoginDialog(SingleAudioBook.this);
}}}

我的对话框是：

public class MyDialog {
private static Dialog myDialog;
 public static void callLoginDialog(final Context c){
...
}

Answer 1

您可以使用listView和Adapter的静态引用。用以下内容替换您的声明 -

Your_Activity -

   public static BaseAdapter your_adapter_name;
    public static ListView your_lv_name;

在另一个班级使用 -

// refresh listview
if( Your_Activity.your_lv_name!=null && Your_Activity.your_adapter_name!=null )
{
        Your_Activity.your_adapter_name.notifyDataSetChanged();
        Your_Activity.your_lv_name.refreshDrawableState();
        Your_Activity.your_lv_name.invalidateViews();
}