Android: Code 1 SQLITE_ERROR (Es wurde kein Spaltenname gefunden)

Question

Ich lerne Datenbankspeicherung in Android dafür Ich versuche, eine einfache App mit Namen von Gemüse und Friuts und Blumen dafür zu erstellen

Ich habe eine Datenbank wie diese entworfen

Mein XML-Design war von hier aus Ich erstelle einen Tabellennamen (Gemüse) und ein Tabellenbild aus Benutzereingaben und speichere diese in meiner Datenbank

Wenn ich auf die Schaltfläche "Fertig" klicke, kann ich meiner Datenbank keine Tabelle hinzufügen. Es wird "Toast-Meldung fehlgeschlagen" angezeigt. Toast-Meldung wurde angezeigt

Meine Datenbankklasse:

public class DatabaseHelper extends SQLiteOpenHelper {

   public static final String DATABASE_NAME = "checkslate.db";
   public static final String TABLE_NAME ="listview_name";
   public static final String COLUMN_ID="ID";
   public static final String COLUMN_TITLE="ITEM_NAME";
    private static final String COLUMN_IMAGE = "image_bitmap";;
    private  Context context;

    public DatabaseHelper(Context context)
   {
      super(context,DATABASE_NAME,null,1);
      this.context=context;

   }
    @Override
    public void onCreate(SQLiteDatabase sqLiteDatabase) {

       String query =
               "CREATE TABLE " +TABLE_NAME +"("
                       + COLUMN_ID + " INTEGER PRIMARY KEY ,"
                       + COLUMN_TITLE + " TEXT, "
                       + COLUMN_IMAGE +  " BLOB);";

       sqLiteDatabase.execSQL(query);

    }

    @Override
    public void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1) {

        sqLiteDatabase.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
        onCreate(sqLiteDatabase);

    }
    void createlist(String title, byte[] image)
    {
        SQLiteDatabase sqLiteDatabase = this.getWritableDatabase();
        ContentValues cv = new ContentValues();

        cv.put("COLUMN_TITLE", title);
        cv.put("COLUMN_IMAGE", image);
                Long result =  sqLiteDatabase.insert( TABLE_NAME, null, cv );
                if (result==-1)
                {
                Toast.makeText(context, "Failed to create", Toast.LENGTH_SHORT).show();
                }else {
                Toast.makeText(context, "Created Sucessfully", Toast.LENGTH_SHORT).show();
                }
    }
}

Meine Aktivitätsklasse

public class NewCreate extends BottomSheetDialogFragment {


   int[] images = {R.drawable.carrot, R.drawable.fruits, R.drawable.pineaaple, R.drawable.beetroot, R.drawable.cabbage, R.drawable.Orange};
   int imageRes = images[0];

    private Bitmap bitmap;


    public NewListCreate() {
    }
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

        View view = inflater.inflate(R.layout.new_list_create, container, false);

        ImageButton done = view.findViewById(R.id.done);
        final EditText listname = (EditText) view.findViewById(R.id.listname);
        final GridView gridView = (GridView) view.findViewById(R.id.gridview);

        final MyCustomAdpter customAdpter = new MyCustomAdpter(images, getContext());
        gridView.setAdapter(customAdpter);
        gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                customAdpter.selectedImage = i;
                customAdpter.notifyDataSetChanged();
                imageRes = images[i];


            }
        });




        done.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {



                String itemname = listname.getText().toString().trim();
                
                Bitmap image = BitmapFactory.decodeResource(getResources(),
                       imageRes);

                // convert bitmap to byte
                ByteArrayOutputStream stream = new ByteArrayOutputStream();
                image.compress(Bitmap.CompressFormat.JPEG, 100, stream);
                byte imageInByte[] = stream.toByteArray();


                
                if (!TextUtils.isEmpty(listname.getText().toString())) {

                    DatabaseHelper db = new DatabaseHelper(getContext());
                    db.createlist(itemname,imageInByte);

//                    startActivity(new Intent(getContext(), CheckslateHome.class).putExtra("data", itemname).putExtra("image", imageRes));
//                    dismiss();
                } else {
                    Toast.makeText(getContext(), "List Name not Empty ", Toast.LENGTH_SHORT).show();
                }

            }



        });

        return view;

    }

    public class MyCustomAdpter extends BaseAdapter {

        public int selectedImage = 0;
        private int[] icons;
        private Context context;
        private LayoutInflater layoutInflater;

        public MyCustomAdpter(int[] icons, Context context) {
            this.icons = icons;
            this.context = context;
            this.layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        }

        @Override
        public int getCount() {
            return icons.length;
        }

        @Override
        public Object getItem(int i) {
            return null;
        }

        @Override
        public long getItemId(int i) {
            return 0;
        }

        @Override
        public View getView(int i, View view, ViewGroup viewGroup) {

            if (view == null) {
                view = layoutInflater.inflate(R.layout.image_list, viewGroup, false);

            }


            ImageView imageicons = view.findViewById(R.id.image);
         

            if (i < icons.length) {

                imageicons.setImageResource(icons[i]);

                if (i != selectedImage) {
                    imageicons.setImageAlpha(50);
                }
                imageicons.setScaleType(ImageView.ScaleType.CENTER_CROP);
                // imageicons.setLayoutParams(new GridView.LayoutParams(150, 150));
                if (i == selectedImage) {

                    view.setBackgroundColor(Color.WHITE);
                } else {
                    view.setBackgroundColor(Color.TRANSPARENT);
                }
            }
            ;


            return view;
        }
    }

Error :

 android.database.sqlite.SQLiteException: table listview_name has no column named COLUMN_TITLE (code 1 SQLITE_ERROR): , while compiling: INSERT INTO listview_name(COLUMN_TITLE,COLUMN_IMAGE) VALUES (?,?)
        at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
        at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:903)
        at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:514)
        at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
        at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
        at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
        at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1569)
        at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1440)
        at com.Karthickyuvan.checkslate.DatabaseHelper.createlist(DatabaseHelper.java:51)
        at com.Karthickyuvan.checkslate.NewListCreate$2.onClick(NewListCreate.java:92)
        at android.view.View.performClick(View.java:6724)
        at android.view.View.performClickInternal(View.java:6682)
        at android.view.View.access$3400(View.java:797)
        at android.view.View$PerformClick.run(View.java:26479)
        at android.os.Handler.handleCallback(Handler.java:873)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:226)
        at android.app.ActivityThread.main(ActivityThread.java:7225)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:499)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:962)

Answer 1

Wenn Sie die Konstanten für Spaltennamen definiert haben, sollten Sie sie verwenden. Hier übergeben Sie sie als Zeichenfolge, und deshalb wird beim Einfügen von Daten in die Tabelle eine Fehlermeldung angezeigt.

createlistVerwenden Sie in Ihrer Methode unten

cv.put(COLUMN_TITLE, title);
cv.put(COLUMN_IMAGE, image);

anstelle dessen, was Sie verwenden:

cv.put("COLUMN_TITLE", title);
cv.put("COLUMN_IMAGE", image);