Source code file with the layout file all posted:
MainActivity. Java

 
Package com. Baidu. Listview. 
The import android. App. The Activity; 
The import android. The content. The Context; 
The import android. Graphics. Color; 
The import android. OS. Bundle; 
The import android. Util. Log; 
The import android. View. The view; 
The import android. View. ViewGroup; 
The import android. Widget. BaseAdapter; 
The import android. Widget. The Button; 
The import android. Widget. LinearLayout; 
The import android. Widget. ListView. 
The import android. Widget. TextView; 
The import android. Widget. Toast; 
Import the Java. Util. ArrayList; 
import java.util.List; 

Public class MainActivity extends the Activity implements the View. An OnClickListener {
Private DatabaseHelper iDatabaseHelper; 
Private Button Btn_CreateDB Btn_ShowListView; 
Private DatabaseDAO iDatabaseDAO; 
Private List IList. 
Private LinearLayout LayoutRoot. 
Private ListView iListView; 
@ Override 
Protected void onCreate (Bundle savedInstanceState) {
super.onCreate(savedInstanceState); 
setContentView(R.layout.activity_main); 
IDatabaseHelper=new DatabaseHelper (this); 
Btn_CreateDB=(Button) the findViewById (R.i db tn_SetDatabase); 
Btn_ShowListView=(Button) the findViewById (R.i db tn_ShowListView); 
LayoutRoot=(LinearLayout) the findViewById (R.i d.L ayout_ShowListViewSpeace); 
IListView=(ListView) the findViewById (R.i, dc ontrol_ListView); 
IListView. SetAdapter (new MyAdapter ()); 
Btn_CreateDB. SetOnClickListener (this); 
Btn_ShowListView. SetOnClickListener (this); 

} 

@ Override 
Public void onClick (View v) {
The switch (v.g etId ()) {
Case R.i db tn_SetDatabase://create the database and the initialization data 
Try {
IDatabaseHelper. GetWritableDatabase (); 
} the catch (Exception e) {
ToastMessage (this, "exception! Reason: \ n "+ um participant etMessage (). The toString (), 0). 
} the finally {
ToastMessage (this, "database creation success!" , 0); 
IDatabaseDAO=new DatabaseDAO (MainActivity. This); 
Long getLongNumber=iDatabaseDAO. DataAddToBase (); 
If (getLongNumber!=0) {
ToastMessage (this, "data initialization success!! ", 0); 
} else {
ToastMessage (this, "data initialization failed, please try later!!!!! ", 0); 
} 
} 
break; 
Case R.i db tn_ShowListView://show the ListView data 

break; 
} 
} 
Private class MyAdapter extends BaseAdapter {

@ Override 
Public int getCount () {
Return iList. The size (); 
} 

@ Override 
Public Object the getItem (int position) {
return null; 
} 

@ Override 
Public long getItemId (int position) {
return 0; 
} 

@ Override 
Public View getView (int position, View convertView, ViewGroup parent) {
TextView TextControl=new TextView (getApplicationContext ()); 
TextControl. SetTextSize (20); 
TextControl. SetTextColor (Color BLACK); 
//DataGetSet iDataGetSet=iList. Get (position). ID; 
Int id=iList. Get (position). Id. 
String name=iList. Get (position) User_Name; 
String number=iList. Get (position). Phone_Number. 
//TextControl setText (iDataGetSet. ToString ()); 
TextControl. SetText (" ID: "+ ID +" t \ \ t "+ number +" t \ \ t + number "); 
//LayoutRoot. AddView (TextControl); 

Return TextControl; 
} 
} 
Private void ToastMessage (Context Context, String MSG, int serial) {
Toast. MakeText (context, MSG, serial), show (); 
} 
} 

-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
DatabaseDAO. Java

 
Package com. Baidu. Listview. 

The import android. Content. ContentValues; 
The import android. The content. The Context; 
The import android. Database. Cursor; 
The import android. Database. Sqlite. SQLiteDatabase; 

Import the Java. Util. ArrayList; 
import java.util.List; 

Public class DatabaseDAO {
Private DatabaseHelper iDatabaseHelper; 
Public DatabaseDAO Context (Context) {
IDatabaseHelper=new DatabaseHelper (context); 
} 
Public long DataAddToBase () {
Long getLongState=0; 
SQLiteDatabase db=iDatabaseHelper. GetWritableDatabase (); 
ContentValues iValues=new ContentValues (); 
for(int i=0; I<50; I++) {
IValues. Put (" user_name ", "king of speed" + I); 
IValues. Put (" phone_number ", "13455433" + I); 
GetLongState=db. Insert (" AppTable ", null, iValues); 
} 
The close (); 
Return getLongState; 
} 
Public List FindDataAll () {
List IDatabase=new ArrayList (a); 
SQLiteDatabase db=iDatabaseHelper. GetReadableDatabase (); 
Cursor iCursor=db. Query (" AppTable ", new String [] {" id ", "user_name", "phone_number"}, null, null, null, null, null); 
While (iCursor. MoveToNext ()) {
Int ID_get=iCursor. Get int (iCursor getColumnIndex (" id ")); 
String UserName_Get=iCursor. Get String (iCursor getColumnIndex (" user_name ")); 
String Phone_Number_Get=iCursor. Get String (iCursor getColumnIndex (" phone_number ")); 
DataGetSet iDataGetSet=new DataGetSet (ID_get UserName_Get, Phone_Number_Get); 
IDatabase. Add (iDataGetSet); 
} 
Return iDatabase; 
} 
} 
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