数据库 存图片

private static void createBitmTable(SQLiteDatabase db) {    String bitmapTable = "create table if not exists bitmap (data BLOB)";    db.execSQL(bitmapTable);}public static void insertBitmap(SQLiteDatabase db, byte[] bytes) {    String sqlString = "insert into bitmap values (?)";    Object[] valueObjects = new Object[] {bytes};    db.execSQL(sqlString, valueObjects);}public static byte[] selectBitmap(SQLiteDatabase db) {    String sqlString = "select * from bitmap";    byte[] bitmap = null;    Cursor cursor = null;    cursor = db.rawQuery(sqlString,null);    if (cursor.moveToNext()) {        bitmap = cursor.getBlob(cursor.getColumnIndex("data"));    }    cursor.close();    return bitmap;}private void showBitmap() {    // 获取指定图片的二进制    ByteArrayOutputStream outputStream = new ByteArrayOutputStream();    Bitmap bitmap = ((BitmapDrawable) getResources().getDrawable(R.drawable.ic_launcher)).getBitmap();    bitmap.compress(Bitmap.CompressFormat.PNG, 100, outputStream); // 压缩为PNG格式,100表示跟原图大小一样    byte[] source = outputStream.toByteArray();    // 存    DataBaseHelp.insertBitmap(mDb, source);    // 取    byte[] bimapFromDb = DataBaseHelp.selectBitmap(mDb);    // 展现    Bitmap bitmap2 = BitmapFactory.decodeByteArray(bimapFromDb, 0, bimapFromDb.length);    mImageView.setImageBitmap(bitmap2);}