如何将onclick动态添加到arraylist

Posted 2023-05-07

【中文标题】如何将onclick动态添加到arraylist

【英文标题】：How to add onclick dynamically to arraylist

【发布时间】：2014-04-19 11:33:38

【问题描述】：

我正在从 DB 获取标题列表，并使用 ArrayList 将这些标题添加到布局中。此布局是使用adapters 创建的。当我单击此布局中显示的标题时，我想打开另一个布局。我该如何解决这个问题？请有任何建议......

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.os.Bundle;
import android.app.ListActivity;
import android.util.Log;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;

public class FullDetails extends ListActivity  

    ArrayList<String> listItems=new ArrayList<String>();
ArrayAdapter<String> adapter;
    private ListView lv;
    int clickCounter=0;
    @Override
    protected void onCreate(Bundle icicle) 
        super.onCreate(icicle);
        setContentView(R.layout.activity_full_details);
       adapter=new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,listItems);
         setListAdapter(adapter);
        fullItems(null);


    
JSONArray all=new JSONArray();
    String size;
    public void fullItems(View v) 
        String result = "";
         InputStream is=null;
        try

            HttpClient httpclient = new DefaultHttpClient();
            HttpPost httppost = new HttpPost("http://MOTal.com/and/events.jsp");
                HttpResponse response = httpclient.execute(httppost);
                        HttpEntity entity = response.getEntity();
                     is = entity.getContent();
        catch(Exception e)
                Log.e("log_tag", "Error in http connection "+e.toString());
        
        try
                    BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8);

                StringBuilder sb = new StringBuilder();
                String line = null;
                while ((line = reader.readLine()) != null) 
                        sb.append(line + "\n");
                
                is.close();

                result=sb.toString();
        catch(Exception e)
                Log.e("log_tag", "Error converting result "+e.toString());
        
        try
                JSONArray jArray = new JSONArray(result);
                            for(int i=0;i<jArray.length();i++)

                        JSONObject json_data = jArray.getJSONObject(i);

                    size=json_data.getString("size");

                   for(int j=0;j<Integer.parseInt(size);j++)

                     all=json_data.getJSONArray("res"+j);
listItems.add(all.get(0)+" \n venue:"+all.get(1)+" Price:"+all.get(3));
                   

                

        
        catch(JSONException e)
                Log.e("log_tag", "Error parsing data "+e.toString());
        

        adapter.notifyDataSetChanged();
    

activity_full_details.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_
    android:layout_ >
    <ListView
        android:id="@android:id/list"
        android:layout_
        android:layout_
        android:drawSelectorOnTop="false"
    />
</LinearLayout>

【问题讨论】：

添加 onClick 到 ArrayList ?

点击数组列表？？我猜你想要一个 listview 行点击监听器。

@blackbelt,@raghunandan 感谢您的回复。如果可能的话onclick to arraylist 它解决了我的问题

我不知道。你有什么问题？

这里的jsonArray不打印任何数据ne.?

【参考方案1】：

您正在寻找的是列表项单击侦听器。你可以试试lv<your listview's obj>.setOnItemCLickListener下面是给你的例子。

listView.setOnItemClickListener(new OnItemClickListener() 
  @Override
  public void onItemClick(AdapterView<?> parent, View view,
    int position, long id) 
    Toast.makeText(getApplicationContext(),
      "Click ListItem Number " + position, Toast.LENGTH_LONG)
      .show();
  
); 

关注这个基本example

没有像onClick 到ArrayList 这样的东西，点击是为查看而设置的。

【讨论】：

感谢您的回复。我按照我解决了这个问题的例子。

【参考方案2】：

设置好适配器后，还要设置“OnItemClickListener”：

getListView().setOnItemClickListener(new OnItemClickListener() 

    public void onItemClick(AdapterView<?> parent, View view, int position,
        long id) 
        // Your logic when clicking. You can get the object for that row by 
        // calling parent.get(position) and casting to your data type in your adapter.
        // which in this case seems to be string.
    
);

【参考方案3】：

在这个例子中以look为解决方案，认为是这样：

ListView lv = getListView();
lv.setOnItemClickListener(new OnItemClickListener() 
public void onItemClick(AdapterView<?> parent, View view,
    int position, long id) 
//Here put the code for each item. You now the position in the array because is the same as item.

【参考方案4】：

试试这个

 @Override
protected void onListItemClick(ListView l, View v, int position, long id) 
    // TODO Auto-generated method stub
    super.onListItemClick(l, v, position, id);
    Toast.makeText(getApplicationContext(), "Test", Toast.LENGTH_LONG).show();