Question

我有以下问题。我构建了一个listView，然后使用自定义laytout item_event显示某些数据。这一切都有效。现在我想让app每次点击listView中的一个元素时都允许我移动到新的活动。我的MainMenu扩展了ListActivity，因此我可以使用setListAdapter。我现在如何使用setOnItemClickListener？我试图创建ListView对象，然后引用它，但我无法访问它，因为它的android：id =“@ android：id / list”/＆gt;。怎么做？

提前谢谢你，约翰

以下是错误日志：

package com.mysampleapp;

import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.app.ListActivity;


import com.userpreferencesom.AmazonClientManager;
import com.userpreferencesom.DynamoDBManager;

import java.util.ArrayList;



public class MainMenu extends ListActivity {

    //ListView eventsList;
    Button newEvent;
    Event event= new Event();
    //ArrayList<Event> eventList = new ArrayList();


    public static AmazonClientManager clientManager = null;

    private ArrayAdapter<String> arrayAdapter = null;
    private ArrayList<String> labels = null; // list of names of events manly for test)
    private ArrayList<Event> items = null;  //stores events

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

        clientManager = new AmazonClientManager(this); //CIPEK
        new GetEventList().execute(); //calling GetEventList from included class below

        newEvent = (Button) findViewById(R.id.new_event_button);

        newEvent.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(MainMenu.this, EventCreationActivity.class);
                startActivity(intent);
            }
        });


    }

    private void setupActivity() {
        Log.v("MOJEMOJEMOJE", event.getName());
    }

    private class GetEvent extends AsyncTask<Void, Void, Void> {

        protected Void doInBackground(Void... voids) {

            event = DynamoDBManager.getEvent("");  //in bracket ID number
            return null;
        }

        protected void onPostExecute(Void result) {

            setupActivity();
        }
    }


    private class GetEventList extends AsyncTask<Void, Void, Void> {

        protected Void doInBackground(Void... inputs) {

            labels = new ArrayList<String>();

            items = DynamoDBManager.getEventList();

            for (Event up : items) {
                labels.add(up.getName());
            }

            return null;
        }

        protected void onPostExecute(Void result) {

            Log.v("Events:", labels.toString());
            updateDisplay();

        }
    }

    public void updateDisplay(){
        //Using Event Adapter to display data
        EventAdapter adapter = new EventAdapter(this, R.layout.item_event, items);
        setListAdapter(adapter);

        setOnItemClickListener(new AdapterView.OnItemClickListener() { //HERE IT CANNOT BUILD
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                Intent intent = new Intent(MainMenu.this, EventViewActivity.class);
                startActivity(intent);
            }
        });
    }

}

Answer 1

当您点击Override

的每个项目时，您可onListItemClick ListView处理事件

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

        Toast.makeText(this, "click at " + position,Toast.LENGTH_LONG).show();
    }
}

在扩展ListView的Main Activity中设置onItemClickListener

1 个答案: