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我的列表视图重复数据一些时间快速单击按钮我该怎么办请帮我看看这个图像http://imgur.com/ed5uDtp一段时间后显示像这样http://imgur.com/jAt4yn7 显示正确数据在listview上，但有时快速单击按钮会加载重复数据，我将如何解决这个问题？帮帮我

          public class thirdstep extends Activity implements View.OnClickListener {
 int count = 0;


String id;
String title;
String tmpString, finaldate;
String valll;


ProgressBar prgLoading;
TextView txtAlert;

int IOConnect = 0;


String mVal9;


Button e01;
Button e02;
Button e03;
Button e04;
Button e05;


String SelectMenuAPI;
String url;


String URL;
String URL2, URL3, URL4;
String menu_title;

JSONArray school;


ListView listCategory;

String status;

String School_ID;
String  Menu_ID;


String School_name;
String Meal_groupid;
String _response;
String _response2;
String CategoryAPI;
String SelectMenuAPI2;

TextView menu_nametxt;
thirdstepAdapter cla;
static ArrayList<Long> Category_ID = new ArrayList<Long>();
static ArrayList<String> school_name = new ArrayList<String>();
static ArrayList<String> menu_name = new ArrayList<String>();

static ArrayList<String> dish_name = new ArrayList<String>();
static ArrayList<String> dish_ID = new ArrayList<String>();
static ArrayList<String> day = new ArrayList<String>();

static ArrayList<Long> Vacation_ID = new ArrayList<Long>();
static ArrayList<String> Vacation_name = new ArrayList<String>();
static ArrayList<String> Vacation_Date = new ArrayList<String>();

String mydate;
String mode;
String s2;


ArrayList<String> myList,myList2;



@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.category_list2);



    listCategory = (ListView) findViewById(R.id.thirdscreenlist);

    prgLoading = (ProgressBar) findViewById(R.id.prgLoading);
    txtAlert = (TextView) findViewById(R.id.txtAlert);


    e01 = (Button) findViewById(R.id.e01);
    e02 = (Button) findViewById(R.id.e02);
    e03 = (Button) findViewById(R.id.e03);
    e04 = (Button) findViewById(R.id.e04);
    e05 = (Button) findViewById(R.id.e05);

    e01.setOnClickListener(this);
    e02.setOnClickListener(this);

    e03.setOnClickListener(this);
    e04.setOnClickListener(this);
    e05.setOnClickListener(this);


    cla = new thirdstepAdapter(thirdstep.this);

    listCategory.setOnItemClickListener(new OnItemClickListener() {

        public void onItemClick(AdapterView<?> arg0, View arg1,
                int position, long arg3) {
            // TODO Auto-generated method stub


            Intent intent = new Intent(thirdstep.this,  fifthscreen.class);

            startActivity(intent);



        }
    });


    new getDataTask().execute();
}


void clearData() {

    Category_ID.clear();
    school_name.clear();
    menu_name.clear();

    dish_name.clear();
    dish_ID.clear();
    day.clear();

    Vacation_ID.clear();
    Vacation_name.clear();
    Vacation_Date.clear();

 }

 public class getDataTask extends AsyncTask<Void, Void, Void> {

    getDataTask() {
        if (!prgLoading.isShown()) {
            prgLoading.setVisibility(0);
            txtAlert.setVisibility(8);

        }
    }

    @Override
    protected void onPreExecute() {
        // TODO Auto-generated method stub

    }

    @Override
    protected Void doInBackground(Void... arg0) {
        // TODO Auto-generated method stub
        parseJSONData();
        return null;
    }

    @Override
    protected void onPostExecute(Void result) {
        // TODO Auto-generated method stub
        prgLoading.setVisibility(8);

        if ((Category_ID.size() > 0) || IOConnect == 0) {

            listCategory.setAdapter(cla);
            cla.notifyDataSetChanged() ;
            listCategory.invalidateViews();



        } else {
            txtAlert.setVisibility(0);
            menu_nametxt.setText("");
            listCategory.setVisibility(View.GONE);
        }
    }
}

public void parseJSONData() {
    clearData();

    SelectMenuAPI="";
    SelectMenuAPI = Utils.Schoolmenu +Menu_ID+"&sid="+School_ID+"&lid=" +  
             SchoolLevelId+"&mealid="+Meal_groupid;

    URL = SelectMenuAPI;
     URL2 = URL.replace(" ", "%20");


    try {

           Log.i("url",""+URL2);

        HttpClient client = new DefaultHttpClient();
        HttpConnectionParams
                .setConnectionTimeout(client.getParams(), 15000);
        HttpConnectionParams.setSoTimeout(client.getParams(), 15000);
        HttpUriRequest request = new HttpGet(URL2);
        HttpResponse response = client.execute(request);

        HttpEntity resEntity = response.getEntity();
          _response=EntityUtils.toString(resEntity);


        JSONObject json5 = new JSONObject(_response);

        status = json5.getString("status");
        if (status.equals("1")) {

        JSONArray school5 = json5.getJSONArray("data");



        }
        }
        else {

        }
        SelectMenuAPI2="";
    SelectMenuAPI2 = Utils.SchoolVacation+mVal9;



        //  clearData();
            URL3 = SelectMenuAPI2;
            URL4 = URL3.replace(" ", "%20");

             Log.i("url",""+URL4);









        JSONObject json2 = new JSONObject(_response);

        status = json2.getString("status");
        if (status.equals("1")) {

            if (Vacation_Date.contains(mydate)) {
                message = "holiday";





            JSONObject json4 = new JSONObject(str2);

                status = json4.getString("status");
                if (status.equals("1")) {

                     school = json4.getJSONArray("data");

                    for (int k = 0; k < school.length(); k++) {
            JSONObject jb = (JSONObject) school .getJSONObject(k);
                        Vacation_ID.add((long) k);

String[] mVal = new String[school.length()];

       if(school.getJSONObject(k).getString("date").equals(mydate))
                        {

mVal[k] = school.getJSONObject(k).getString("title");

mVal3 = mVal[k];
}


}

}

} else {

JSONArray school = json2.getJSONArray("data");

for (int i = 0; i < school.length(); i++) {
JSONObject object = school.getJSONObject(i);


if (object.getString("Schedule").equals("weekly")) {

if (object.getString("day").equals(Todayday)) {
Category_ID.add((long) i);
school_name

         .add(object.getString("school_name"));

           dish_ID.add(object.getString("dish_id"));


          dish_name.add(object.getString("dish_name"));


            menu_name.add(object.getString("menu_title"));

    day.add(object.getString("day"));
    count = count + 1;



    String[] mVal = new String[school.length()];

    for (int k = 0; k < school.length(); k++) {
  mVal[k] = school.getJSONObject(k).getString("menu_title");
 message = "weekly";
 mVal2 = mVal[0];



}

}


if(dish_name != null &&  
          !dish_name.isEmpty()) 
     {
     message = "weekly";
       }

    else {
    message = "error";


    }

    } 

    else {
        message = "error";


    }

        }

            }

        }



        else {
            message = "error";


        }

    } catch (MalformedURLException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        IOConnect = 1;
        e.printStackTrace();
    } catch (JSONException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}


@Override
public void onClick(View v) {
    // TODO Auto-generated method stub
    switch (v.getId()) {

    case R.id.e01:
        // do stuff;


        listCategory.setVisibility(View.GONE);



        new getDataTask().execute();

        break;

    case R.id.e02:
        // do stuff;
        listCategory.setVisibility(View.GONE);

        new getDataTask().execute();

        break;
    case R.id.e03:
        // do stuff;
        listCategory.setVisibility(View.GONE);

        new getDataTask().execute();

        break;

    case R.id.e04:
        // do stuff;
        listCategory.setVisibility(View.GONE);

        new getDataTask().execute();

        break;
    case R.id.e05:
        listCategory.setVisibility(View.GONE);
        // do stuff;

        new getDataTask().execute();

        break;

    }

}


   }
4

2 回答 2

0

试试这个..

只需删除以下行并尝试它..

listCategory.invalidateViews();

因为

ListView.invalidateViews()用于告诉 ListView 使其所有子项视图 ( redraw them) 无效。请注意，视图数不必与项目数相等。这是因为 ListView 会回收其项目视图并在您滚动时以智能的方式在屏幕上移动它们。

于 2013-10-24T11:45:48.230 回答
0

您正在调用 asynctask 两次，这使所有部分都制作了两次，我的意思是您在填充和填充数组两次之前要清理两次。你应该控制你的异步任务在最后一个完成之前不要执行。

1-创建一个布尔值

2-对 onClicks 设置条件：

if(yourBoolean){
new getDataTask().execute();}

3- 在您的 asyncTask 的 onPreExecute 中使 yourBoolean=false 和 onPostExecute 再次使 yourBoolean=true。

于 2013-10-24T11:51:06.297 回答