使用ListActivity链接对话框

Question

我正在努力学习ListAvtivity。我编写了一些呈现List的代码，当您单击List中的Item时，您将进入一个提供一些任意信息的Activity。 我试图想出一些方法，如果用户点击列表中的Item，他会看到Dialog Box一些信息，而不是一个全新的Activity。

来源：

package com.mavenmaverick.listviewtest;

import android.app.ListActivity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;

 public class ActivityExample extends ListActivity{

 static final String[] CHOICES = new String[]{

             "Mercury",
             "Venus",
             "Earth",
             "Mars",
             "Jupiter",
             "Saturn",
             "Uranus",
             "Neptune",
             "Pluto",

};

 @Override
 protected void onCreate(Bundle savedInstanceState) {                    
         super.onCreate(savedInstanceState);

      setListAdapter((ListAdapter) new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, CHOICES));   
      getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
      getListView().setTextFilterEnabled(true);
      getListView().setOnItemClickListener(new OnItemClickListener() 
      {

        @Override
        public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                long arg3) {
            switch (arg2) {
            case 0:
                startActivity(new Intent(ActivityExample.this,TestActivity.class));
                break;  
            case 1:
                startActivity(new Intent(ActivityExample.this,TestActivity.class));
                break;  
            case 2:
                startActivity(new Intent(ActivityExample.this,TestActivity.class));
                break;  
            case 3:
                startActivity(new Intent(ActivityExample.this,TestActivity.class));
                break;
            case 4:
                startActivity(new Intent(ActivityExample.this,TestActivity.class));
                break;  
            case 5:
                startActivity(new Intent(ActivityExample.this,TestActivity.class));
                break;  
            case 6:
                startActivity(new Intent(ActivityExample.this,TestActivity.class));
                break;  
            case 7:
                startActivity(new Intent(ActivityExample.this,TestActivity.class));
                break;
            case 8:
                startActivity(new Intent(ActivityExample.this,TestActivity.class));
                break;  
            default:
                break;
            }

        }  

    });
 }
}

Answer 1

您可以直接在onItemClick中抓取您的内容。使用parent.getItemAtPosition()执行此操作。由于您使用字符串数组填充ListView，getItemAtPosition将返回一个字符串。

您的代码应如下所示：

getListView().setOnItemClickListener(new OnItemClickListener() 
  {

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position,
            long id) {
                String content = (String)parent.getItemAtPosition(position);
                // do something with the dialog 
                showDialog(content);
            }

  }

你应该更多地浏览ListView。

Answer 2

您可以在onItemClick中使用/创建对话框，并将标题设置为planet的名称，您甚至可以set the view强>对话到你想要的风格。

<强>样品：

@Override
    public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
            long arg3) {
        switch (arg2) {
        case 0:
            Dialog dialog = new Dialog(this);
            dialog.setTitle(CHOICES[args]);
            dialog.setContentView(R.layout.your_layout_to_dialog); //<-- if you want to add some view to your dialog
            dialog.show();
            break;  

Answer 3

试试这个家伙会帮助你......

    public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                    long arg3) {
    AlertDialog.Builder alertDialog = new AlertDialog.Builder(Youractivity.this);

            // Setting Dialog Title
            alertDialog.setTitle("AlertDialog");

      switch (arg2) {
            case 0:
                break;  
            case 1:

                break;  
            case 2:

                break;  
            case 3:

                break;
            case 4:

                break;  
            case 5:

                break;  
            case 6:

                break;  
            case 7:

                break;
            case 8:

                break;  
            default:
                break;
            }
 // Setting Dialog Message
            alertDialog.setMessage("A Planet in the Solar System"+arg2+"listview Item clicked");
            // Setting Positive "Yes" Button
            alertDialog.setPositiveButton("YES", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog,int which) {

                // Write your code here to invoke YES event
                Toast.makeText(getApplicationContext(), "You clicked on YES", Toast.LENGTH_SHORT).show();
                }
            });

      // Showing Alert Message
            alertDialog.show();  

            }