问题描述

ListActivity无法显示

应用运行之后没有崩溃，但是什么也不显示，空白页。不知道问题出在哪里?

帮忙看一下，多谢。

package com.eric.thebasics;import android.app.ListActivity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.widget.ArrayAdapter;import android.widget.ListView;public class TutorialTwo extends ListActivity {String classNames[] = {""main""menu""Sweet""TutorialOne""};@Overrideprotected void onCreate(Bundle savedInstanceState) {    // TODO Auto-generated method stub    super.onCreate(savedInstanceState);    setListAdapter(new ArrayAdapter<String>(this    android.R.layout.simple_list_item_1));}protected void onListItemClick(ListView lv View v int position long id){    super.onListItemClick(lv v position id);    String openClass = classNames[position];    try{        Class selected = Class.forName(""com.eric.thebasics."" + openClass);        Intent selectedIntent = new Intent(thisselected);        startActivity(selectedIntent);    }catch (ClassNotFoundException e){        e.printStackTrace();    }}}

button代码：

tut2.setOnClickListener(new View.OnClickListener() {        @Override        public void onClick(View v) {            // TODO Auto-generated method stub            buttonSound.start();            startActivity(new Intent(""com.eric.thebasics.TUTORIALTWO""));

manifest ：

<activity        android:name="".TutorialTwo""        android:label=""@string/app_name"" >        <intent-filter>            <action android:name=""com.eric.thebasics.TUTORIALTWO"" />            <category android:name=""android.intent.category.DEFAULT"" />        </intent-filter>    </activity>

解决方案

setListAdapter(new ArrayAdapter<String>(this    android.R.layout.simple_list_item_1))这句话里你的数据是不是根本没加上去？