Android：从位图转换为Byte [] OutOfMemory错误

Question

我尝试将保存在手机存储中的图像（.jpg）转换为位图，然后将此位图转换为byte []，以将该图像上传到数据库中。

public void insertData() {
        File file = new File(photoUrl);
        Bitmap bitmap = BitmapFactory.decodeFile(file.getAbsolutePath());
        ByteArrayOutputStream stream = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
        bytes = stream.toByteArray();
        DBConnUpdate conn = new DBConnUpdate();
        conn.execute(   "insert into test (img, name) "+
                        "values ( '"+ bytes +"', '"+ productName +"')");

    }

但由于这里出现OutOfMemory错误而无法正常工作：

bytes = stream.toByteArray();

为什么？

Answer 1

Try This Code:-


 BitmapFactory.Options options = new BitmapFactory.Options();
                 options.inDither = false;
                 options.inJustDecodeBounds = false;
                 options.inPreferredConfig = Bitmap.Config.ARGB_8888;
                 options.inSampleSize = 1;
                 options.inPurgeable = true;
                 options.inPreferQualityOverSpeed = true;
                 options.inTempStorage=new byte[32 * 1024];

    File file = new File(photoUrl);
            Bitmap bitmap = BitmapFactory.decodeFile(file.getAbsolutePath(), options);
            ByteArrayOutputStream stream = new ByteArrayOutputStream();
            bitmap.compress(Bitmap.CompressFormat.PNG, 80, stream);
            bytes = stream.toByteArray();