将blob转换为位图后，图像不会显示在imageView中

Question

正如我在标题中提到的，我的图像不会显示在imageView中。我已经包含了标题和描述以及图像，并且都在textViews中正确显示。

    // RetrieveImage();
            if(databaseExists()){
                displayToast("Database exists");
                db = SQLiteDatabase.openDatabase(myPath, null,SQLiteDatabase.OPEN_READONLY);
                if(db != null){
                c = db.rawQuery("SELECT image,title,description FROM Images WHERE _Id =?",new String[]{"1"},null);
                if (c != null ) {
                      if(c.moveToFirst()){
                        img = c.getBlob(1);
                        title = c.getString(1);
                        description = c.getString(1);
                        txt1.setText(title);
                        txt2.setText(title);

                        ByteArrayInputStream imageStream=ByteArrayInputStream(img);
                        Bitmap bm = BitmapFactory.decodeStream(imageStream);
                        imgView.setImageBitmap(bm);


                                          }}}

我知道这是一个简单的错误，但请帮助我发现错误。

编辑：我附上了将图片插入数据库的代码片段

        yourSelectedImage = BitmapFactory.decodeFile(filePath);
               ImageView img1 = (ImageView) findViewById(R.id.imageView1);
           img1.setImageBitmap(yourSelectedImage);
               ByteArrayOutputStream bos=new ByteArrayOutputStream();
           yourSelectedImage.compress(Bitmap.CompressFormat.PNG, 100, bos);
               img =bos.toByteArray();

           private void handleDB()  {
        try {
            String myPath = DB_PATH + DATABASE_NAME; 
            //open database in read and write mode
            checkDB = SQLiteDatabase.openDatabase(myPath, null,SQLiteDatabase.OPEN_READWRITE);
            if(checkDB!=null){
            ContentValues contentValues = new ContentValues();
            contentValues.put("myid", myId );
            contentValues.put("image", img);
            contentValues.put("title", caption);
            contentValues.put("description", description);
            database.insert("Images", null,contentValues);       
            }
            } catch(SQLiteException se ){
            Log.e(getClass().getSimpleName(), "Could not create or Open the database");
        }
    }
  public void createDBFields(){

        database =  openOrCreateDatabase(DATABASE_NAME, MODE_PRIVATE, null);
        database.execSQL("CREATE TABLE IF NOT EXISTS Images ( _id INTEGER PRIMARY KEY, "+"myid nvarchar(50)," +"image BLOB," + "title nvarchar(50)," +
"description nvarchar(50));");
    }//createDBFields close