Question

我有一个ListView和Iwant它，当你点击列表中的一个项目时，它会带你到另一个活动，但是带有我点击的变量。

例如，ifIi有item1，item2，item3我想要它，当我点击item1时它会转到另一个活动，而在其他活动中，将显示json feed中item1内的所有内容。

到目前为止，这是我的代码：

import java.util.ArrayList;
import java.util.List;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;

public class ChooseTeamActivity extends ListActivity {
    public String FullData = null;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);

    setContentView(R.layout.chooseact);
    final String FullData = getIntent().getStringExtra("FullData");
    Log.v("lc", "chooseActivity:" + FullData);
    try{

   JSONObject obj = new JSONObject(FullData);
   List<String> leagues = new ArrayList<String>();


   JSONObject objData = obj.getJSONObject("data");

   JSONArray jArray = objData.getJSONArray("structure");



   for (int i=0; i < jArray.length(); i++)
   {     JSONObject oneObject = jArray.getJSONObject(i);   

    JSONArray DivisionsArray = oneObject.getJSONArray("divisions");



    for (int d=0; d < DivisionsArray.length(); d++){

        JSONObject DivDict = DivisionsArray.getJSONObject(d);   
        leagues.add(DivDict.getString("name"));
    }

   }
   setListAdapter ( new ArrayAdapter<String>(this, R.layout.single_item, leagues));

   ListView list = getListView();

    list.setTextFilterEnabled(true);


    list.setOnItemClickListener(new OnItemClickListener(){

        public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                long arg3) {
            // TODO Auto-generated method stub
            //Toast.makeText(getApplicationContext(), ((TextView) arg1).getText(),1000).show();
            Intent nextScreen = new Intent(getApplicationContext(), ChooseTeamActivity.class);
            nextScreen.putExtra("FullData", FullData);
            startActivity(nextScreen);
        }
        });

    } catch (JSONException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

  }

}

Answer 1

保持对DivisionArray的字段引用，然后覆盖onListItemClicked以获取所单击项目的索引，然后在DivisionArray中查找该项目：

@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
    super.onListItemClick(l, v, position, id);

    // TODO: Add code here to look up the item in DivisionArray by index, then use
    // that to launch an activity either with the index or the JSON structure as an extra
}

获得索引后，可以使用索引或JSON结构启动活动：

    Intent intent = new Intent(this, MyActivity.class);
    intent.putExtra("selectedItem", /* TODO: use the index to the item or the JSON structure itself here */);
    startActivity(intent);

Answer 2

覆盖click事件处理程序：

@Override
protected void onListItemClick (ListView l, View v, int position, long id) { 

}

并在那里添加代码以使用参数激活您的活动（例如，您的json内容或获取它的方法）

Intent intent = new Intent(this, DetailedActivity.class);
//leagues.get(position);
//or just use the position:
foo.putExtra("itemIndex", position);
//foo.putExtra("fullData", FullData); //or just the part you want
startActivity(foo);

Answer 3

您可以使用setOnItemClickListener()方法并使用意图传递要在列表中显示的数据字符串

list.setOnItemClickListener(new OnItemClickListener() {
            public void onItemClick(AdapterView<?> parent, View view,
                     int position, long id) {
                          Bundle b = new Bundle();
                          b.putString("itemData",data[poition]);
                          Intent intent = new Intent(Activity1.this,Activity2.class);
                          intent.putExtras(b);
                          startActivity(intent);
            }
        });

这里data []是一个字符串数组，其中包含要从Activity1传递给Activity2的数据。活动1是当前活动，您也可以修复Activity2，只需用不同的数据填充它。

Answer 4

使用此代码。

    yourListView.setOnItemClickListener(new OnItemClickListener() 
    {
        public void onItemClick(AdapterView<?> arg0, View arg1, final int position, long arg3) 
        {


            Intent intent = new Intent(YourActivity.this, NotesActivity.class);
            intent.putExtra("Date", "Item To Pass In Ur Activity");
            startActivity(intent);
        }
    });

在您的活动上写下以下代码，以获取列表视图通过的项目

String selectedDate = getIntent().getStringExtra("Date");

Android on click listener传递json变量

4 个答案: