删除的项目仍显示在结果页面上。

Question

我可以在没有任何问题的情况下编辑或删除单个项目，但是当编辑项目后单击删除按钮时，该项目仍显示在ListView中，即使它已从数据库中删除。

ListViewActivity.java

public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.all_requests); 

    requestsList = new ArrayList<HashMap<String, String>>(); 

    new LoadAllRequests().execute(); 

    ListView lv = getListView(); 

    lv.setOnItemClickListener(new OnItemClickListener() { 

     public void onItemClick(AdapterView<?> parent, View view, 
       int position, long id) { 
      // getting values from selected ListItem 
      String request_id = ((TextView) view.findViewById(R.id.request_id)).getText().toString(); 

      // Starting new intent 
      Intent in = new Intent(getApplicationContext(), 
        ViewRequestActivity.class); 
      // sending rid to next activity 
      in.putExtra(TAG_ID, request_id); 

      // starting new activity and expecting some response back 
      startActivityForResult(in, 55); 
     } 
    }); 

} 

Answer 1

，而不是关闭和重新打开活动，您应该使用invalidateViews

yourListView.invalidateViews(); 

Answer 2

您需要将适配器再次登录到ListView

Answer 3

你也可以尝试刷新活动。我相信它是ListViewActivity.restart（）;