Creazione di tabelle nel database sqlite su android

Question

 
@Override 
     public void onCreate(SQLiteDatabase db) 
     { 
      try{ 
       db.execSQL("create table " +   NotificationManager.getUserStatic(context) + "log ("+ 
       KEY_TIME +" INTEGER primary key, "+ KEY_TEXT +" TEXT not null);"); 

      } 
      catch (SQLException e) { 
       e.printStackTrace(); 
      } 
     } 

     /** 
     * onOpen method called when app is opening. 
     */ 

     @Override 
     public void onOpen(SQLiteDatabase db) 
     { 
      try{ 
       System.out.println("tophere"); 
       db.execSQL("create table if not exists "+DATABASE_NAME+"." + NotificationManager.getUserStatic(context) + "log ("+ 
       KEY_TIME +" INTEGER primary key, "+ KEY_TEXT +" TEXT not null);"); 
       System.out.println("downhere"); 
      } 
      catch (SQLException e){ 
       e.printStackTrace(); 
      } 
     } 

Abbiamo questo codice per creare un database per un'applicazione. il problema è che, per quanto possiamo dire, non crea le tabelle, quindi quando proviamo a inserirle nelle tabelle e leggere da esse, si blocca. abbiamo provato tutto, i System.out.println sono lì per vedere dove fallisce. otteniamo la parte superiore, ma non arriva mai alla parte inferiore del registro, quindi stiamo indovinando che qualcosa sta causando il fallimento lì. abbiamo controllato con DDMS che il database si trova nella cartella corretta, quindi il database dovrebbe essere lì, ma per qualche motivo non riesce a trovarlo (riga 2 e 3 nel registro).

Qualche idea?

questo è il log degli errori:

 
04-27 10:45:46.768: I/System.out(6441): tophere 
04-27 10:45:46.772: I/SqliteDatabaseCpp(6441): sqlite returned: error code = 1, msg = unknown database NOPO, db=/data/data/dmri.nopo/databases/NOPO 
04-27 10:45:46.772: W/System.err(6441): android.database.sqlite.SQLiteException: unknown database NOPO: , while compiling: create table if not exists NOPO.log (time INTEGER primary key, text TEXT not null); 
04-27 10:45:46.792: W/System.err(6441):  at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method) 
04-27 10:45:46.792: W/System.err(6441):  at android.database.sqlite.SQLiteCompiledSql.(SQLiteCompiledSql.java:68) 
04-27 10:45:46.811: W/System.err(6441):  at android.database.sqlite.SQLiteProgram.compileSql(SQLiteProgram.java:134) 
04-27 10:45:46.811: W/System.err(6441):  at android.database.sqlite.SQLiteProgram.compileAndbindAllArgs(SQLiteProgram.java:361) 
04-27 10:45:46.811: W/System.err(6441):  at android.database.sqlite.SQLiteStatement.acquireAndLock(SQLiteStatement.java:260) 
04-27 10:45:46.811: W/System.err(6441):  at android.database.sqlite.SQLiteStatement.executeUpdateDelete(SQLiteStatement.java:84) 
04-27 10:45:46.811: W/System.err(6441):  at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:1899) 
04-27 10:45:46.823: W/System.err(6441):  at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1839) 
04-27 10:45:46.823: W/System.err(6441):  at dmri.nopo.DBAdapter$DatabaseHelper.onOpen(DBAdapter.java:67) 
04-27 10:45:46.823: W/System.err(6441):  at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:180) 
04-27 10:45:46.902: W/System.err(6441):  at dmri.nopo.DBAdapter.open(DBAdapter.java:86) 
04-27 10:45:46.912: W/System.err(6441):  at dmri.nopo.LogManager.readLogFile(LogManager.java:32) 
04-27 10:45:46.912: W/System.err(6441):  at dmri.nopo.LogActivity.onCreate(LogActivity.java:25) 
04-27 10:45:46.921: W/System.err(6441):  at android.app.Activity.performCreate(Activity.java:4465) 
04-27 10:45:46.921: W/System.err(6441):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 
04-27 10:45:46.931: W/System.err(6441):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920) 
04-27 10:45:46.931: W/System.err(6441):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981) 
04-27 10:45:46.941: W/System.err(6441):  at android.app.ActivityThread.access$600(ActivityThread.java:123) 
04-27 10:45:46.941: W/System.err(6441):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147) 
04-27 10:45:46.953: W/System.err(6441):  at android.os.Handler.dispatchMessage(Handler.java:99) 
04-27 10:45:46.953: W/System.err(6441):  at android.os.Looper.loop(Looper.java:137) 
04-27 10:45:46.972: W/System.err(6441):  at android.app.ActivityThread.main(ActivityThread.java:4424) 
04-27 10:45:46.972: W/System.err(6441):  at java.lang.reflect.Method.invokeNative(Native Method) 
04-27 10:45:46.972: W/System.err(6441):  at java.lang.reflect.Method.invoke(Method.java:511) 
04-27 10:45:46.982: W/System.err(6441):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
04-27 10:45:46.982: W/System.err(6441):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
04-27 10:45:46.992: W/System.err(6441):  at dalvik.system.NativeStart.main(Native Method) 
04-27 10:45:47.002: I/SqliteDatabaseCpp(6441): sqlite returned: error code = 1, msg = no such table: log, db=/data/data/dmri.nopo/databases/NOPO 
04-27 10:45:47.012: D/AndroidRuntime(6441): Shutting down VM 
04-27 10:45:47.012: W/dalvikvm(6441): threadid=1: thread exiting with uncaught exception (group=0x409c01f8) 
04-27 10:45:47.181: E/AndroidRuntime(6441): FATAL EXCEPTION: main 
04-27 10:45:47.181: E/AndroidRuntime(6441): java.lang.RuntimeException: Unable to start activity ComponentInfo{dmri.nopo/dmri.nopo.LogActivity}: android.database.sqlite.SQLiteException: no such table: log: , while compiling: SELECT time, text FROM log 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956) 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981) 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at android.app.ActivityThread.access$600(ActivityThread.java:123) 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147) 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at android.os.Handler.dispatchMessage(Handler.java:99) 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at android.os.Looper.loop(Looper.java:137) 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at android.app.ActivityThread.main(ActivityThread.java:4424) 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at java.lang.reflect.Method.invokeNative(Native Method) 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at java.lang.reflect.Method.invoke(Method.java:511) 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at dalvik.system.NativeStart.main(Native Method) 
04-27 10:45:47.181: E/AndroidRuntime(6441): Caused by: android.database.sqlite.SQLiteException: no such table: log: , while compiling: SELECT time, text FROM log 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method) 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at android.database.sqlite.SQLiteCompiledSql.(SQLiteCompiledSql.java:68) 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at android.database.sqlite.SQLiteProgram.compileSql(SQLiteProgram.java:143) 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at android.database.sqlite.SQLiteProgram.compileAndbindAllArgs(SQLiteProgram.java:361) 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at android.database.sqlite.SQLiteProgram.(SQLiteProgram.java:127) 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at android.database.sqlite.SQLiteProgram.(SQLiteProgram.java:94) 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at android.database.sqlite.SQLiteQuery.(SQLiteQuery.java:53) 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:47) 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1564) 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1449) 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1405) 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1485) 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at dmri.nopo.DBAdapter.getAllSMS(DBAdapter.java:116) 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at dmri.nopo.LogManager.readLogFile(LogManager.java:34) 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at dmri.nopo.LogActivity.onCreate(LogActivity.java:25) 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at android.app.Activity.performCreate(Activity.java:4465) 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 
04-27 10:45:47.181: E/AndroidRuntime(6441):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920) 
04-27 10:45:47.181: E/AndroidRuntime(6441):  ... 11 more 

Answer 1

Prima di tutto vorrei consiglia di utilizzare android.util.Log per la registrazione delle eccezioni in Android.

Secondo: ho il sospetto che siano state create tabelle con nomi errati. Il tuo errore dice che la query non riesce a trovare "log", ma vedo che fai qualche concatenazione nell'istruzione "CREATE". Questa potrebbe essere la ragione.

È possibile verificare ciò che viene effettivamente creato per voi. Visualizzando la base sqlite creata.

Si può provare:

1. adb shell
2. cd /data/data/<your.package.name>/databases
3. sqlite3 <yourdbname>
4. .tables

Answer 2

questo vi aiuterà ho provato e la sua anche lavorando

questo è solo un esempio

public class DatabaseMarks { 

    public static final String KEY_STUID = "stuid"; 
    public static final String KEY_SUB1 = "subject_one"; 
    public static final String KEY_SUB2 = "subject_two"; 
    public static final String KEY_SUB3= "subject_three"; 
    public static final String KEY_MARKS1= "marks_one"; 
    public static final String KEY_MARKS2 = "marks_two"; 
    public static final String KEY_MARKS3 = "marks_three"; 

    private static final String DATABASE_NAME = "Student"; 
    private static final String DATABASE_MARKSTABLE = "StudentMarks"; 
    private static final int DATABASE_VERSION = 1; 

    private DbHelper ourHelper; 
    private final Context ourContext; 
    private SQLiteDatabase ourDatabase; 

    private static class DbHelper extends SQLiteOpenHelper{ 

     public DbHelper(Context context) { 
      super(context, DATABASE_NAME, null, DATABASE_VERSION); 
      // TODO Auto-generated constructor stub 
     } 

     @Override 
     public void onCreate(SQLiteDatabase db) { 
      // TODO Auto-generated method stub 
       db.execSQL(" CREATE TABLE " + DATABASE_MARKSTABLE + " (" + 
        KEY_STUID + " TEXT PRIMARY KEY, " + 
        KEY_SUB1 + " TEXT NOT NULL, " + 
        KEY_SUB2 + " TEXT NOT NULL, " + 
        KEY_SUB3 + " TEXT NOT NULL, " + 
        KEY_MARKS1 + " INTEGER NOT NULL, " + 
        KEY_MARKS2 + " INTEGER NOT NULL, " + 
        KEY_MARKS3 + " INTEGER NOT NULL);" 
      ); 
     } 

     @Override 
     public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
      // TODO Auto-generated method stub 

      db.execSQL("DROP TABLE IF EXISTS " + DATABASE_MARKSTABLE); 
      onCreate(db); 
     } 

    } 
    public DatabaseMarks(Context c){ 
     ourContext = c; 
    } 
    public DatabaseMarks open()throws SQLException{ 
     ourHelper = new DbHelper(ourContext); 
     ourDatabase = ourHelper.getWritableDatabase(); 
     return this; 
    } 
    public void close(){ 
     ourHelper.close(); 
    } 
    public long createInsert(String stuid, String subject1, String subject2, 
      String subject3, String marks1, String marks2, String marks3) { 
     // TODO Auto-generated method stub 
     ContentValues cv = new ContentValues(); 
     cv.put(KEY_STUID, stuid); 
     cv.put(KEY_SUB1, subject1); 
     cv.put(KEY_SUB2, subject2); 
     cv.put(KEY_SUB3, subject3); 
     cv.put(KEY_MARKS1, marks1); 
     cv.put(KEY_MARKS2, marks2); 
     cv.put(KEY_MARKS3, marks3); 
     return ourDatabase.insert(DATABASE_MARKSTABLE, null, cv); 

    } 

Answer 3

Rimuovere DATABASE_NAME parte del tuo SQLs.

Se volete NOPO il nome del database, e si desidera creare una tabella log, quindi:

private static class DatabaseHelper extends SQLiteOpenHelper { 

    DatabaseHelper(Context context) { 
     super(context, "NOPO", null, 2); 
    } 

    @Override 
    public void onCreate(SQLiteDatabase db) { 
     db.execSQL("CREATE TABLE " + "log" + " (" 
       + KEY_TIME +" INTEGER primary key, " 
       + KEY_TEXT +" TEXT not null);"); 
    } 

    @Override 
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
     Log.w(TAG, "Upgrading database from version " + oldVersion + " to " 
       + newVersion + ", which will destroy all old data"); 
     db.execSQL("DROP TABLE IF EXISTS log"); 
     onCreate(db); 
    } 
} 

super(context, "NOPO", null, 2); rende questo oggetto DatabaseHelper solo nell'ambiente NOPO database, quindi non è necessario specificare in SQL .

ps. Ho hardcode qualcosa e dovresti EVITARLO.

Answer 4

classe pubblica LoginDataBaseAdapter { stringa finale statica DATABASE_NAME = "login.db";

static final int DATABASE_VERSION = 1; 

    public static final int NAME_COLUMN = 1; 

    // TODO: Create public field for each column in your table. 
    // SQL Statement to create a new database. 

    static final String DATABASE_CREATE = "create table "+"LOGIN"+ 
           "(" +"ID"+" integer primary key autoincrement,"+ "USERNAME text,PASSWORD text,UNAME text); "; 

    // Variable to hold the database instance 
    public SQLiteDatabase db; 

    // Context of the application using the database. 
    private final Context context; 

    // Database open/upgrade helper 
    private DataBaseHelper dbHelper; 

    public LoginDataBaseAdapter(Context _context) 
    { 
     context = _context; 
     dbHelper = new DataBaseHelper(context, DATABASE_NAME, null, DATABASE_VERSION); 

    } 
    public LoginDataBaseAdapter open() throws SQLException 
    { 
     db = dbHelper.getWritableDatabase(); 
     return this; 
    } 
    public void close() 
    { 
     db.close(); 
    } 

    public SQLiteDatabase getDatabaseInstance() 
    { 
     return db; 
    } 

Answer 5

  public class DBHandler extends SQLiteOpenHelper { 
       private static String DATABASE_NAME = "mydb"; 
       private static int DATABASE_VERSION = 1; 

       String TABLE_NAME = "Student"; 

       String KEY_ID = "id"; 
       String KEY_STUDENT_NAME = "name"; 
       String KEY_STUDENT_MARKS = "marks"; 

      public DBHandler(Context context) { 
        super(context, DATABASE_NAME, null, DATABASE_VERSION); 
       } 

     @Override 
      public void onCreate(SQLiteDatabase db) { 
       // creating table 
       String query = "CREATE TABLE " + TABLE_NAME + 
         " (" + 
         KEY_ID + " INTEGER PRIMARY KEY," + 
         KEY_STUDENT_NAME + " TEXT," + 
         KEY_STUDENT_MARKS + " INTEGER" 
         ") "; 
       db.execSQL(query); 

      // insertion in the table 
      ContentValues values = new ContentValues(); 
      values.put(KEY_QUESTION_ID, "1"); 
      values.put(KEY_STUDENT_NAME , "abc"); 
      values.put(KEY_STUDENT_MARKS , "95"); 
      db.insert(TABLE_NAME, null, values); 

      values.put(KEY_QUESTION_ID, "2"); 
      values.put(KEY_STUDENT_NAME , "def"); 
      values.put(KEY_STUDENT_MARKS , "93"); 
      db.insert(TABLE_NAME, null, values); 
    } 
     @Override 
     public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
      // TODO Auto-generated method stub 

      db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME); 
      // Create tables again 
      onCreate(db); 
     } 
    // retrieve date 
    List<Student> getAllData(int Id) { 

      List<Student> student = new ArrayList<Student>(); 
      // Select All Query 
      String selectQuery = "SELECT * FROM " + TABLE_NAME + " WHERE KEY_ID =" + "'" + Id + "'"; 

      SQLiteDatabase db = this.getWritableDatabase(); 

      Cursor cursor = db.rawQuery(selectQuery, null); 

      // looping through all rows and adding to list 
      if (cursor.moveToFirst()) { 
       do { 
        Student std = new Student(); 
        u.setId(cursor.getInt(0)); 
        u.setStudentName(cursor.getString(1)); 
        u.setMarks(cursor.getString(2)); 

        student.add(std); 
       } while (cursor.moveToNext()); 
      } 
      // return student list 
      return student; 
     } 
    } 

    public class Student { 

     public static int Id; 
     public static String studentName; 
     public static int marks; 

     public int getId() { 
      return Id; 
     } 

     public static void setId(int id) { 
      Id = id; 
     } 

     public String getStudentName() { 
      return studentName; 
     } 

     public static void setStudentName(String studentName) { 
      Student.studentName = studentName; 
     } 

     public int getMarks() { 
      return marks; 
     } 

     public static void setMarks(int marks) { 
      Student.marks = marks; 
     } 
    } 

    public class MainActivity extends AppCompatActivity { 

     @Override 
     protected void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.activity_main); 

      DBHandler db = new DBHandler(getApplicationContext()); 
      List<Student> std = new ArrayList<Student>(); 
      rl = db.getAllData(1); 
      for (Student s : std) { 
       Log.v("Id",s.getId()); 
       Log.v("Name",s.getStudentName()); 
       Log.v("Marks",s.getMarks()); 
     } 
    } 
}