Question

我有一个主要活动，显示从parse.com重新获得的列表（我知道parse.com正在关闭，我正在迁移到我自己的服务器上） enter image description here

现在我在这个活动中有所有工作，比如onitemclick等。但我有另一个活动，即搜索活动，搜索用户搜索的列表项是否存在于主要活动的列表中这也可以正常工作，但是当显示搜索结果时，用户应该能够点击所需的结果并将其定向到singleitem类，就像它们处于主要活动中一样

我无法实现这一点，因为当我点击搜索结果时没有任何反应我尝试使用onitemclicklistener实现搜索活动，就像我在主要活动中所做的那样但没有变化

我的代码

列表inimage的主要活动的aynctask及其onitem clicklistener

private class RemoteDataTask extends AsyncTask<Void, Void, Void> {
    @Override
    protected void onPreExecute() {
        super.onPreExecute();


        dialog = new SpotsDialog(InterActivity.this, R.style.Custom);

        dialog.show();
    }


    @Override
    protected Void doInBackground(Void... params) {
        // Create the array
        codelist = new ArrayList<CodeList>();
        try {
            // Locate the class table named "Country" in Parse.com
            ParseQuery<ParseObject> query = new ParseQuery<ParseObject>(
                "InterActivity");
            // Locate the column named "ranknum" in Parse.com and order list
            // by ascending
            query.orderByAscending("_created_at");
            query.setLimit(limit);
            ob = query.find();
            for (ParseObject inter : ob) {




                map.setDescription((String) inter.get("subheading"));
                map.setIntroduction((String) inter.get("intro"));


                codelist.add(map);
            }
        } catch (ParseException e) {
            Log.e("Error", e.getMessage());
            e.printStackTrace();
        }
        return null;
    }

    @Override
    protected void onPostExecute(Void result) {
        // Locate the listview in listview_main.xml


        listview = (SwipeMenuListView) findViewById(R.id.inter_layoutListView);
        // Pass the results into ListViewAdapter.java
        adapter = new FinalAdapter(InterActivity.this,
                                      codelist);


        // Binds the Adapter to the ListView
    listview.setAdapter(adapter);


        listview.setOnItemClickListener(InterActivity.this);


        dialog.dismiss();





}


@Override
public void onItemClick(AdapterView<?> p1, View view, int position, long p4)
{

    ObjectMapper mapper = new ObjectMapper();
    CodeList codes = (CodeList) adapter.getItem(position);


    try{

        Intent intent = new Intent(InterActivity.this, SingleItemView.class);

        String jsonString = mapper.writeValueAsString(codes);


        intent.putExtra("selected item", jsonString);





        intent.putExtra("subheading",
                        (codelist.get(position).getDescription()));



        intent.putExtra("intro",
                        (codelist.get(position).getIntroduction()));



        // Start SingleItemView Class
        //   startActivity(intent);
        startActivityForResult(intent, 1);

    }catch(JsonProcessingException e){
        //something went w3ong
    }
}

搜索活动

public class SearchActivity extends Activity

实现OnItemClickListener {

protected  EditText searchedittext;
 Button searchButton;
List<ParseObject> ob;

@Override
public void onCreate(Bundle savedInstanceState )
{
    // TODO: Implement this method
    super.onCreate(savedInstanceState);
    setContentView(R.layout.search_layout);

    searchedittext = (EditText) findViewById(R.id.search_layoutEditText);

    final ListView searchedlist = (ListView) findViewById(R.id.searchlist);
    searchButton = (Button) findViewById(R.id.searchlayoutbtn);

    searchButton.setOnClickListener(new View.OnClickListener(){

        @Override
        public void onClick(View v){
            String seaechedit = searchedittext.getText().toString();

            if(seaechedit.isEmpty()){

                AlertDialog.Builder builder = new AlertDialog.Builder(SearchActivity.this);
                builder.setMessage("PLEASE ENTER SOME SEARCH QUERY")
                       .setTitle("EMPTY SEARCH") 
                       .setPositiveButton(android.R.string.ok, null);

                AlertDialog dialog = builder.create();
                dialog.show();

            }
            else{
                setProgressBarIndeterminateVisibility(true);
                // InterActivity is the class name in parse database where listview retrives it data from
                ParseQuery<ParseObject> query = new ParseQuery<ParseObject>(
                    "InterActivity");

                query.whereContains("listheading", seaechedit);
                query.orderByAscending("_created_at");
                query.setLimit(200);

                query.findInBackground(new FindCallback<ParseObject>() {

                        @Override
                        public void done(List<ParseObject> p1, ParseException e)
                        {
                            setProgressBarIndeterminateVisibility(false);

                            if(e == null){

                                ob = p1;

                                String [] searchHeadings = new String[ob.size()];

                                int i = 0;

                                     // listheading is the coloumn name in parse database
                                      for(ParseObject heading : ob){ searchHeadings[i] = (String) heading.get("listheading");
                                i++;

                                }

                                ArrayAdapter<String> adapter = new ArrayAdapter<String>( SearchActivity.this, android.R.layout.simple_list_item_1, searchHeadings );
                                searchedlist.setAdapter(adapter);

searchedlist.setOnItemClickListener（本）;

                            }else{

                                Log.e("searchactivity", e.getMessage()); 
                                AlertDialog.Builder builder = new AlertDialog.Builder(SearchActivity.this); 
                                builder.setMessage(e.getMessage()) 
                                       .setTitle("Nothing found")
                                       .setPositiveButton(android.R.string.ok, null); 
                                AlertDialog dialog = builder.create();
                                dialog.show();
                            }
                        }
                    });
            }


        }

    });

}


@Override
public void onItemClick(AdapterView<?> p1, View view, int position, long p4)
{

    ObjectMapper mapper = new ObjectMapper();
    CodeList codes = (CodeList) adapter.getItem(position);


    try{

        Intent intent = new Intent(InterActivity.this, SingleItemView.class);

        String jsonString = mapper.writeValueAsString(codes);


        intent.putExtra("selected item", jsonString);





        intent.putExtra("subheading",
                        (codelist.get(position).getDescription()));



        intent.putExtra("intro",
                        (codelist.get(position).getIntroduction()));



        // Start SingleItemView Class
        //   startActivity(intent);
        startActivityForResult(intent, 1);

    }catch(JsonProcessingException e){
        //something went w3ong
    }

 }

Answer 1

发现错误

忘记在主要活动中执行搜索活动中的RemoteDataTask

Onitemclicklistener在搜索活动中的工作方式与在主活动中的工作方式不同

1 个答案: