为什么没有创建这个sqlite数据库列?

时间:2015-04-06 17:26:36

标签: android android-sqlite blob

我正在尝试向我的sq lite数据库添加一个新列(图像),但每当我尝试向列(图像)添加值时,它就会崩溃,并且说没有这样的列。它似乎没有创建列,但我不明白为什么。

这是打印错误和我的其余代码。

  

栈跟踪

  android.database.sqlite.SQLiteException: no such column: image (code 1): , while compiling: SELECT DISTINCT _id, task, date, image FROM mainToDo
        at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
        at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:889)
        at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:500)
        at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
        at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
        at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:37)
        at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:44)
        at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1316)
        at android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1163)
        at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1034)
        at com.gnumbu.errolgreen.importedapplication.DBAdapter.getAllRows(DBAdapter.java:96)
        at com.gnumbu.errolgreen.importedapplication.PeekFragment.populateListView(PeekFragment.java:135)
        at com.gnumbu.errolgreen.importedapplication.PeekFragment.onActivityCreated(PeekFragment.java:99)
        at android.support.v4.app.Fragment.performActivityCreated(Fragment.java:1794)
        at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:977)
        at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1136)
        at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:739)
        at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1499)
        at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:488)
        at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:141)
        at android.support.v4.view.ViewPager.populate(ViewPager.java:1073)
        at android.support.v4.view.ViewPager.populate(ViewPager.java:919)
        at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1441)
        at android.view.View.measure(View.java:17430)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:430)
        at android.view.View.measure(View.java:17430)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463)
        at android.support.v7.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:453)
        at android.view.View.measure(View.java:17430)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:430)
        at android.view.View.measure(View.java:17430)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463)
        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
        at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
        at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
        at android.view.View.measure(View.java:17430)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:430)
        at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2560)
        at android.view.View.measure(View.java:17430)
        at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2001)
        at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1166)
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1372)
        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1054)
        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5779)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
        at android.view.Choreographer.doCallbacks(Choreographer.java:580)
        at android.view.Choreographer.doFrame(Choreographer.java:550)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
        at android.os.Handler.handle
  

DBAdapter.java

public class DBAdapter {

private static final String TAG = "DBAdapter"; //used for logging database version changes

// Field Names:
public static final String KEY_ROWID = "_id";
public static final String KEY_TASK = "task";
public static final String KEY_DATE = "date";
public static final String KEY_IMAGE = "image";

public static final String[] ALL_KEYS = new String[] {KEY_ROWID, KEY_TASK, KEY_DATE, KEY_IMAGE};

// Column Numbers for each Field Name:
public static final int COL_ROWID = 0;
public static final int COL_TASK = 1;
public static final int COL_DATE = 2;
public static final int COL_IMAGE = 3;

// DataBase info:
public static final String DATABASE_NAME = "dbToDo";
public static final String DATABASE_TABLE = "mainToDo";
public static final int DATABASE_VERSION = 1; // The version number must be incremented each time a change to DB structure occurs.

//SQL statement to create database
private static final String DATABASE_CREATE_SQL = 
        "CREATE TABLE " + DATABASE_TABLE 
        + " (" + KEY_ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, "
        + KEY_TASK + " TEXT NOT NULL, "
        + KEY_DATE + " TEXT"
        + KEY_IMAGE + " BLOB"
        + ");";


private final Context context;
private DatabaseHelper myDBHelper;
private SQLiteDatabase db;


public DBAdapter(Context ctx) {
    this.context = ctx;
    myDBHelper = new DatabaseHelper(context);
}

// Open the database connection.
public DBAdapter open() {
    db = myDBHelper.getWritableDatabase();
    return this;
}

// Close the database connection.
public void close() {
    myDBHelper.close();
}

// Add a new set of values to be inserted into the database.
public long insertRow(String task, String date, byte[] image ) {
    ContentValues initialValues = new ContentValues();
    initialValues.put(KEY_TASK, task);
    initialValues.put(KEY_DATE, date);
    initialValues.put(KEY_IMAGE, image);


    // Insert the data into the database.
    return db.insert(DATABASE_TABLE, null, initialValues);
}

// Delete a row from the database, by rowId (primary key)
public boolean deleteRow(long rowId) {
    String where = KEY_ROWID + "=" + rowId;
    return db.delete(DATABASE_TABLE, where, null) != 0;
}

public void deleteAll() {
    Cursor c = getAllRows();
    long rowId = c.getColumnIndexOrThrow(KEY_ROWID);
    if (c.moveToFirst()) {
        do {
            deleteRow(c.getLong((int) rowId));              
        } while (c.moveToNext());
    }
    c.close();
}

// Return all data in the database.
public Cursor getAllRows() {
    String where = null;
    Cursor c =  db.query(true, DATABASE_TABLE, ALL_KEYS, where, null, null, null, null, null);
    if (c != null) {
        c.moveToFirst();
    }
    return c;
}

// Get a specific row (by rowId)
public Cursor getRow(long rowId) {
    String where = KEY_ROWID + "=" + rowId;
    Cursor c =  db.query(true, DATABASE_TABLE, ALL_KEYS, 
                    where, null, null, null, null, null);
    if (c != null) {
        c.moveToFirst();
    }
    return c;
}

// Change an existing row to be equal to new data.
public boolean updateRow(long rowId, String task, String date, byte[] image) {
    String where = KEY_ROWID + "=" + rowId;
    ContentValues newValues = new ContentValues();
    newValues.put(KEY_TASK, task);
    newValues.put(KEY_DATE, date);
    newValues.put(KEY_IMAGE, image);
    // Insert it into the database.
    return db.update(DATABASE_TABLE, newValues, where, null) != 0;
}


private static class DatabaseHelper extends SQLiteOpenHelper
{
    DatabaseHelper(Context context) {
        super(context, DATABASE_NAME, null, DATABASE_VERSION);
    }

    @Override
    public void onCreate(SQLiteDatabase _db) {
        _db.execSQL(DATABASE_CREATE_SQL);           
    }

    @Override
    public void onUpgrade(SQLiteDatabase _db, int oldVersion, int newVersion) {
        Log.w(TAG, "Upgrading application's database from version " + oldVersion
                + " to " + newVersion + ", which will destroy all old data!");

        // Destroy old database:
        _db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE);

        // Recreate new database:
        onCreate(_db);
    }
}

}

  

PeekFragment.java

public class PeekFragment extends Fragment implements View.OnClickListener {


    //Delcare Public Variables !
    Time today = new Time(Time.getCurrentTimezone());
    DBAdapter myDB;
    EditText etTasks;
    ImageView img;
    ByteArrayBuffer baf ;
    ImageView dbimage ;




    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.other_layout, container, false);
        Button a = (Button) v.findViewById(R.id.addTask);
        Button b = (Button) v.findViewById(R.id.deleteButton);
        a.setOnClickListener(this);
        b.setOnClickListener(this);

        return v;
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.addTask:

                today.setToNow();
                String timestamp = today.format("%Y-%-m-%d %H:%M:%S");

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

                    dbimage.buildDrawingCache();//Draws image to bitmap
                    Bitmap bmap = dbimage.getDrawingCache();

                    myDB.insertRow(etTasks.getText().toString(), timestamp, getBytes(bmap));

                }
                break;
            case R.id.deleteButton:
                myDB.deleteAll();
                break;
        }
        populateListView();
    }



    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        etTasks = (EditText) getView().findViewById(R.id.editTextTask);
        dbimage = (ImageView) getView().findViewById(R.id.dbImageUpload);
        openDB();
       // new Task_like_flag().execute();
       // img =(ImageView) getView().findViewById(R.id.imageViewpicture);
        populateListView();
        listViewItemClick();
        listViewItemLongClick();

        Cursor cursor = myDB.getAllRows();

        String[] fromFieldNames = new String[]{DBAdapter.KEY_ROWID, DBAdapter.KEY_TASK, DBAdapter.KEY_IMAGE};
        int[] toViewIDs = new int[]{R.id.idView, R.id.resourceView, R.id.imageViewpicture};
        SimpleCursorAdapter myCursorAdapter;
        myCursorAdapter = new SimpleCursorAdapter(getActivity(), R.layout.tobedeletedd_view, cursor, fromFieldNames, toViewIDs, 0) {
        };
        ListView myList = (ListView) getView().findViewById(R.id.listView);

        myList.setAdapter(myCursorAdapter);

    }

    /**
     * public void onClick_AddTask(View v) {
     * today.setToNow();
     * String timestamp = today.format("%Y-%-m-%d %H:%M:%S");
     * <p/>
     * if (!TextUtils.isEmpty(etTasks.getText().toString())) {
     * myDB.insertRow(etTasks.getText().toString(), timestamp);
     * <p/>
     * }
     * populateListView();
     * }
     */

    private void openDB() {
        myDB = new DBAdapter(getActivity());
        myDB.open();
    }

    private void populateListView() {
        Cursor cursor = myDB.getAllRows();

        String[] fromFieldNames = new String[]{DBAdapter.KEY_ROWID, DBAdapter.KEY_TASK, DBAdapter.KEY_IMAGE};
        int[] toViewIDs = new int[]{R.id.idView, R.id.resourceView, R.id.imageViewpicture};
        SimpleCursorAdapter myCursorAdapter;
        myCursorAdapter = new SimpleCursorAdapter(getActivity(), R.layout.tobedeletedd_view, cursor, fromFieldNames, toViewIDs, 0) {
        };
        ListView myList = (ListView) getView().findViewById(R.id.listView);

        myList.setAdapter(myCursorAdapter);

    }

    private void updateTask(long id) {
        Cursor cursor = myDB.getRow(id);

        if (cursor.moveToFirst()) {
            String task = etTasks.getText().toString();
            today.setToNow();
            String date = today.format("%Y-%-m-%d %H:%M:%S");

            dbimage.buildDrawingCache();//Draws image to bitmap
            Bitmap bmap = dbimage.getDrawingCache();

            myDB.updateRow(id, task, date,getBytes(bmap));
        }

        cursor.close();
    }

    private void listViewItemClick() {
        ListView myList = (ListView) getView().findViewById(R.id.listView);
        myList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                updateTask(id);
                populateListView();
            }
        });
    }




    private void listViewItemLongClick() {
        ListView myList = (ListView) getView().findViewById(R.id.listView);

        myList.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {


            @Override
            public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
                myDB.deleteRow(id);
                populateListView();

                return false;
            }
        });

    }
/**
    public Bitmap convertBlobToBitmap(byte[] blobByteArray) {
        Bitmap tempBitmap=null;
        if(blobByteArray!=null)
            tempBitmap = BitmapFactory.decodeByteArray(blobByteArray, 0, blobByteArray.length);
        return tempBitmap;
    }
    public class Task_like_flag extends AsyncTask<String, Void, Void> {
        private final ProgressDialog dialog = new ProgressDialog(getActivity());
        JSONObject object_feed;
        // can use UI thread here
        protected void onPreExecute() {
            this.dialog.setMessage("Loading...");
            this.dialog.setCancelable(false);
            this.dialog.show();
        }

        @Override
        protected Void doInBackground(String... params) {
            URL url = null;
            try {
                url = new URL("http://i.imgur.com/cWdWl6L.png");
            } catch (MalformedURLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }  //http://example.com/image.jpg
            //open the connection
            URLConnection ucon = null;
            try {
                ucon = url.openConnection();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            //buffer the download
            InputStream is = null;
            try {
                is = ucon.getInputStream();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            BufferedInputStream bis = new BufferedInputStream(is,128);
            baf = new ByteArrayBuffer(128);
            //get the bytes one by one
            int current = 0;
            try {
                while ((current = bis.read()) != -1) {
                    baf.append((byte) current);
                }
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            today.setToNow();
            String timestamp = today.format("%Y-%-m-%d %H:%M:%S");
            String voteText = "Test";
            myDB.insertRow(etTasks.getText().toString(), timestamp, baf.toByteArray(), voteText);
            return null;
        }

        @Override
        protected void onPostExecute(Void result) {
            byte[] imageByteArray;
            Bitmap theImage = null;
            try{
                Cursor cursor = myDB.fetchAllNotes();
               // startManagingCursor(myDB);

                if (cursor.moveToFirst()) {


                    do {
                        imageByteArray   =  cursor.getBlob(cursor.getColumnIndex(DBAdapter.KEY_IMAGE));
                        ByteArrayInputStream imageStream = new ByteArrayInputStream(imageByteArray);
                        theImage= BitmapFactory.decodeStream(imageStream);

                    } while (cursor.moveToNext());
                }
            }catch(Exception e){
                Log.v("Excep", ""+e);
            }
            img.setImageBitmap(theImage);
            if (this.dialog.isShowing()) {
                this.dialog.dismiss();
            }
        }
    }
*/


    // convert from bitmap to byte array
    public static byte[] getBytes(Bitmap bitmap) {
        ByteArrayOutputStream stream = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.PNG, 0, stream);
        return stream.toByteArray();
    }

    // convert from byte array to bitmap
    public static Bitmap getImage(byte[] image) {
        return BitmapFactory.decodeByteArray(image, 0, image.length);
    }

}

1 个答案:

答案 0 :(得分:3)

你所做的就是创建数据库然后你改变了sql创建语句而不会升级数据库你必须增加数据库版本号并删除onUpgrade()回调上的模式然后重新创建数据库。这是如何运作的。

您只需要将DATABASE_VERSION增加到2

而另一个错误是您忘记了SQL创建语句中的逗号。它应该是

private static final String DATABASE_CREATE_SQL = 
        "CREATE TABLE " + DATABASE_TABLE 
        + " (" + KEY_ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, "
        + KEY_TASK + " TEXT NOT NULL, "
        + KEY_DATE + " TEXT, "
        + KEY_IMAGE + " BLOB"
        + ");";