将图像文件从相机压缩到一定大小

好的,我得到了自己的答案

    File f = new File(mImageDirectory + mImageName);
    if(f.exists()){
        f.delete();
    }

    int MAX_IMAGE_SIZE = 1000 * 1024;
    int streamLength = MAX_IMAGE_SIZE;
    int compressQuality = 105;
    ByteArrayOutputStream bmpStream = new ByteArrayOutputStream();
    while (streamLength >= MAX_IMAGE_SIZE && compressQuality > 5) {
        try {
            bmpStream.flush();//to avoid out of memory error
            bmpStream.reset();
        } catch (IOException e) {
            e.printStackTrace();
        }
        compressQuality -= 5;
        bitmap.compress(Bitmap.CompressFormat.JPEG, compressQuality, bmpStream);
        byte[] bmpPicByteArray = bmpStream.toByteArray();
        streamLength = bmpPicByteArray.length;
        if(BuildConfig.DEBUG) {
            Log.d("test upload", "Quality: " + compressQuality);
            Log.d("test upload", "Size: " + streamLength);
        }
    }

    FileOutputStream fo;

    try {
        fo = new FileOutputStream(f);
        fo.write(bmpStream.toByteArray());
        fo.flush();
        fo.close();
    } catch (IOException e) {
        e.printStackTrace();
    }