Java “未定义类型创建的方法 setListAdapter(ArrayAdapter)”
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"The method setListAdapter(ArrayAdapter) is undefined for the type create"
提问by Nezir
I am completely new to java & android, so I tried to find useful samples from android & databases. I found this blog with a project:
我对 java 和 android 完全陌生，所以我试图从 android 和数据库中找到有用的示例。我发现这个博客有一个项目：
http://saigeethamn.blogspot.com/2009/10/android-developer-tutorial-part-12.html
http://saigeethamn.blogspot.com/2009/10/android-developer-tutorial-part-12.html
I ran the project and it works fine, but I was trying to create a new project to copy & paste the code in it and this is not working :(
我运行了这个项目，它运行良好，但我试图创建一个新项目来复制和粘贴代码，但这是行不通的 :(
I had a problem on this line:
我在这条线上遇到了问题：
this.setListAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,results));
This is the error I get:
这是我得到的错误：
The method setListAdapter(ArrayAdapter) is undefined for the type create
未定义类型 create 的 setListAdapter(ArrayAdapter) 方法
It looks like a method in C#, but I can find it in the original project.
看起来像C#中的一个方法，但是我在原来的项目中可以找到。
Where did I make a mistake?
我在哪里做错了？
采纳答案by Pentium10
When you call this.setListAdapterthis must extend ListActivityprobably you class just extends Activity.
当您调用this.setListAdapterthis must extend 时，ListActivity您的类可能只是 extends Activity。
回答by raabsoft
this code work for me..
这段代码对我有用..
package com.Itrack.Mobile;
import java.util.ArrayList;
import android.app.ListActivity;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.widget.TextView;
import android.widget.Toast;
public class listV extends ListActivity {
public SQLiteDatabase db;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Check if the database exist //
db = openOrCreateDatabase(
"itrackmobile.sqlite"
, SQLiteDatabase.CREATE_IF_NECESSARY
, null
);
try
{
Cursor c = db.query("basico", new String[]
{"_id","codigo","cantidad","fecha"},null,null,null,null,null);
// rutina de prueba //
ArrayList<String> mArrayList = new ArrayList<String>();
c.moveToFirst();
while(!c.isAfterLast()) {
mArrayList.add("ID: " +c.getString(c.getColumnIndex("_id")) +
"\nCodigo : " + c.getString(c.getColumnIndex("codigo")) + "\nCantidad : "
+ c.getString(c.getColumnIndex("cantidad")) + "\nFecha : " +
c.getString(c.getColumnIndex("fecha")) );
c.moveToNext();
}
setListAdapter( new ArrayAdapter<String>
(this,R.layout.single_item,mArrayList));
ListView list = getListView();
list.setTextFilterEnabled(true);
list.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
Toast.makeText(getApplicationContext(), ((TextView)
arg1).getText(), Toast.LENGTH_SHORT).show();
}
});
}
catch (RuntimeException e)
{
Log.e("basico", e.toString(), e);
}
}
}
