登录页面后，我想显示 A for Apple，B for Boy .... 等到 F..in listview。但是在我的应用程序中，我完全登录成功，只有登录表完全创建成功，但没有创建 mainmenu。我想在测试数据库中创建 mainmenu 表，然后我想从 mainmenu 表中获取数据到 android 中的 listview
i try this code
if(username.length()>0&&password.length()>0)
{
SQLiteAdapter db=new SQLiteAdapter(Main.this);
db.openToWrite();
if(db.Login(username,password))
{
System.out.println("goutham");
Intent intent=new Intent(getApplicationContext(),ExampleActivity.class);
startActivity(intent);
}
SQLiteAdapter.java
public class SQLiteAdapter {
public static final String MYDATABASE_NAME = "test";
public static final String KEY_USERNAME = "username";
public static final String KEY_PASSWORD = "password";
public static final String MYDATABASE_TABLE = "mainmenu";
private static final String DATABASE_TABLE = "login";
public static final int MYDATABASE_VERSION = 1;
public static final String KEY_ID = "_id";
public static final String KEY_CONTENT = "Content";
// create table MY_DATABASE (ID integer primary key, Content text not null);
private static final String SCRIPT_CREATE_DATABASE = "create table "
+ MYDATABASE_TABLE + " (" + KEY_ID
+ " integer primary key autoincrement, " + KEY_CONTENT
+ " text not null);";
private static final String DATABASE_CREATE = "create table login (_id integer primary key autoincrement, "
+ "username text not null, " + "password text not null);";
private SQLiteHelper sqLiteHelper;
private SQLiteDatabase sqLiteDatabase;
private Context context;
public SQLiteAdapter(Context c) {
context = c;
}
public SQLiteAdapter openToRead() throws android.database.SQLException {
sqLiteHelper = new SQLiteHelper(context, MYDATABASE_NAME, null,
MYDATABASE_VERSION);
sqLiteDatabase = sqLiteHelper.getReadableDatabase();
return this;
}
public SQLiteAdapter openToWrite() throws android.database.SQLException {
sqLiteHelper = new SQLiteHelper(context, MYDATABASE_NAME, null,
MYDATABASE_VERSION);
sqLiteDatabase = sqLiteHelper.getWritableDatabase();
return this;
}
public void close() {
sqLiteHelper.close();
}
public long insert(String content) {
ContentValues contentValues = new ContentValues();
contentValues.put(KEY_CONTENT, content);
return sqLiteDatabase.insert(MYDATABASE_TABLE, null, contentValues);
}
public int deleteAll() {
return sqLiteDatabase.delete(MYDATABASE_TABLE, null, null);
}
public Cursor queueAll() {
String[] columns = new String[] { KEY_ID, KEY_CONTENT };
Cursor cursor = sqLiteDatabase.query(MYDATABASE_TABLE, columns, null,
null, null, null, null);
return cursor;
}
private static class SQLiteHelper extends SQLiteOpenHelper {
public SQLiteHelper(Context context, String name,
CursorFactory factory, int version) {
super(context, name, factory, version);
}
@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
db.execSQL(SCRIPT_CREATE_DATABASE);
db.execSQL(DATABASE_CREATE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub
}
}
public long AddUser(String username, String password) {
ContentValues initialValues = new ContentValues();
initialValues.put(KEY_USERNAME, username);
initialValues.put(KEY_PASSWORD, password);
return sqLiteDatabase.insert(DATABASE_TABLE, null, initialValues);
}
public boolean Login(String username, String password) {
// TODO Auto-generated method stub
Cursor mCursor = sqLiteDatabase.rawQuery("SELECT * FROM "
+ DATABASE_TABLE + " WHERE username=? AND password=?",
new String[] { username, password });
if (mCursor != null) {
if (mCursor.getCount() > 0) {
return true;
}
}
return false;
}
}
ExampleActivity.java
public class ExampleActivity extends Activity {
private SQLiteAdapter mySQLiteAdapter;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ListView listContent = (ListView) findViewById(R.id.contentlist);
/*
* Create/Open a SQLite database and fill with dummy content and close
* it
*/
mySQLiteAdapter = new SQLiteAdapter(this);
mySQLiteAdapter.openToWrite();
// mySQLiteAdapter.deleteAll();
mySQLiteAdapter.insert("A for Apply");
mySQLiteAdapter.insert("B for Boy");
mySQLiteAdapter.insert("C for Cat");
mySQLiteAdapter.insert("D for Dog");
mySQLiteAdapter.insert("E for Egg");
mySQLiteAdapter.insert("F for Fish");
mySQLiteAdapter.close();
/*
* Open the same SQLite database and read all it's content.
*/
mySQLiteAdapter = new SQLiteAdapter(this);
mySQLiteAdapter.openToRead();
Cursor cursor = mySQLiteAdapter.queueAll();
startManagingCursor(cursor);
String[] from = new String[] { SQLiteAdapter.KEY_CONTENT };
int[] to = new int[] { R.id.text };
SimpleCursorAdapter cursorAdapter = new SimpleCursorAdapter(this,
R.layout.row, cursor, from, to);
listContent.setAdapter(cursorAdapter);
mySQLiteAdapter.close();
}
}
运行程序后登录表仅在数据库中创建，但主菜单表未在数据库中创建。运行程序后显示错误，如 sqlite 返回代码 = 1 在 MY_TABLE 中没有这样的表