如何在listview上实现ClickEvent？

Question

如何在listview上实现Click事件？我应该尝试OnItemClickListener还是OnItemSelectedListener ?我的代码如下：

Mainactivity.java

package com.example.se_02.eventhand;
import android.app.Activity;
import android.app.usage.UsageEvents;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.Toast;
import java.util.ArrayList;

public class MainActivity extends Activity 
{

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

        String[] foods = new String[] {"beef", "icecream", "sausage", "kebab", "falal", "zinger","1","2","3","4","5","6","7","8","9"};
        ArrayList<String> list = new ArrayList<String>();

        for (int i = 0; i < foods.length; ++i ) {
            list.add(foods[i]);
        }
        ListAdapter adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, list);
        final ListView Eventid = (ListView) findViewById(R.id.Eventid);
        Eventid.setAdapter(adapter);
    }
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="6dip" >

  <ListView
    android:id="@+id/Eventid"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentStart="true"
    android:layout_alignParentTop="true" />

</LinearLayout>

我尝试了所有的方法来实现点击事件，但它显示了错误。我怎么才能让它工作呢？

Answer 1

这就是我们在Listview中设置clicklistener的方式。

listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int 
position, long id) {
        }
    });
    // Execute DownloadJSON AsyncTask
    new DownloadJSON().execute();
 }

Answer 2

在你的适配器内部创建一个界面。

 public interface CallBack {
    void getData(Object obj1, Object obj2);
}

从activity的引用初始化它，无论是通过适配器的构造函数还是创建任何方法。我正在为它使用方法

 public void setCallBack(CallBack callBack) {
    this.callBack= callBack;
}

在活动中

   adapter.setCallBack(new adapter.CallBack() {
        @Override
        public void getData(Object obj1, Object obj2) {        
            YOUR_DATA_TYPE data= (YOUR_DATA_TYPE) obj1;
            // code here what you want to do with data of clicked view of list.
        }
    });

然后在适配器内部，在任何视图上单击，设置您要使用的值：

 holder.View.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            callBack.getData(YOUR_DATA,YOUR_DATA);

        }
    });

通过使用此技术，您可以处理在列表视图或重排序视图行的任何视图(如按钮，图像等)上的单击。

Answer 3

Listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
 public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
 switch (listview.getItemAtPosition (position) {
     case "beef" :
          //Do This
     break;
  }
 });
}