单击时从 ListView 继续进行新活动

Posted 2023-05-07

【中文标题】单击时从 ListView 继续进行新活动

【英文标题】：Proceed to new activity from ListView when clicked

【发布时间】：2015-11-08 23:58:03

【问题描述】：

我在 android 中创建了一个列表视图，但现在我试图让列表视图在传递参数时可以点击到新活动。列表视图的数据来自 api。代码如下。

private static String urlString;

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

    urlString = "http://websiteforapi/api/market";
    new ProcessJSON().execute(urlString);


private class ProcessJSON extends AsyncTask<String, Void, String> 
    protected String doInBackground(String...strings)
        String stream = null;
        String urlString = strings[0];

        HTTPDataHandler hh = new HTTPDataHandler();
        stream = hh.GetHTTPData(urlString);

        // Return the data from specified url
        return stream;
    

    protected void onPostExecute(String stream)

        //..........Process JSON DATA................
        if(stream !=null)
            try 
                // Get the full HTTP Data as JSONObject
                JSONObject reader = new JSONObject(stream);

                JSONArray businessArray = reader.getJSONArray("data");
                ArrayList<String> businesses = new ArrayList<String>();
                for(int i = 0; i < businessArray.length(); i++) 
                    JSONObject business_object_0 = businessArray.getJSONObject(i);
                    final String businessname = business_object_0.getString("name");
                    final String business = business_object_0.getString("business");
                    businesses.add(businessname);
                

                ArrayAdapter<String> adapter = new ArrayAdapter<String>(getListView().getContext(),android.R.layout.simple_list_item_1, businesses);
                getListView().setAdapter(adapter);

            catch(JSONException e)
                e.printStackTrace();
            

         // if statement end
     // onPostExecute() end
 // ProcessJSON class end

我在 API 中使用的 JSON 是这样的......

"data":["id":"3","name":"My Test Business 3","phone":"6785555555","email":"[e-mail]","address":"123 This Avenue","city":"Atlanta","state":"GA","zip":"30308","business":"Technology 33333","id":"4","name":"My Test Business 2 ","phone":"6783571004","email":"[e-mail]","address":"123 Some Street","city":"Lawrenceville","state":"GA","zip":"30043","business":"Website building","id":"5","name":"My Test Business 3","phone":"6785555555","email":"[e-mail]","address":"123 This Avenue","city":"Atlanta","state":"GA","zip":"30308","business":"Technology 3","id":"6","name":"My Test Business 5","phone":"6785555555","email":"[e-mail]","address":"123 This Avenue","city":"Atlanta","state":"GA","zip":"30308","business":"Technology 4"]

到目前为止，我可以让 ListView 显示，但到目前为止，我无法让它们可点击到新活动。

【参考方案1】：

根据您的要求试试这个...

yourListView.setOnItemClickListener(new OnItemClickListener() 
                    @Override
                    public void onItemClick(AdapterView<?> parent, View view, int position, long id) 
                        // Code for start new Activity
                        Intent intent = new Intent(MainActivity.this, NewActivity.class);
                        startActivity(intent);
                    
                );

但是你为什么不使用主细节！！！

【讨论】：

不确定您所说的主细节是什么意思。但是代码有效。有没有办法将所选数组列表项的参数传递给下一个活动？我尝试使用以下内容。 Intent intent = new Intent(MarketPlaceActivity.this, SelectedBusinessActivity.class); intent.putExtra（“名称”，企业）；开始活动（意图）；

看到这个传递数据link

【参考方案2】：

你可以使用OnItemClickListener：

  getListView().setOnItemClickListener(new AdapterView.OnItemClickListener() 
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) 
            startActivity(this, NewActivity.class);
        
    );

当然 newActivity 需要在 manifest 中注册。