How can i convert ByteArrayInputStream to jpeg and display on android mobile?

Question

1.i get the android camera data convert to bitmao

if (mBitmap == null)        //create Bitmap image first time
        {
            Camera.Parameters params = camera.getParameters();
            width_ima = params.getPreviewSize().width;
            height_ima = params.getPreviewSize().height;                      
            mBitmap = Bitmap.createBitmap(width_ima, height_ima, Bitmap.Config.RGB_565);
            mRGBData = new int[width_ima * height_ima];
        }

        decodeYUV420SP(mRGBData, data, width_ima, height_ima);
        mBitmap.setPixels(mRGBData, 0, width_ima, 0, 0, width_ima, height_ima);

2.send the data with udp

ByteArrayOutputStream byteStream = new ByteArrayOutputStream(); 

        mBitmap.compress(Bitmap.CompressFormat.JPEG, 50, byteStream);   // !!!!!!!  change compression rate to change packets size

        byte data[] = byteStream.toByteArray();
        Log.e(TAG, "SIZE: " + data.length);

        int nb_packets = (int) Math.ceil(data.length / (float)DATAGRAM_MAX_SIZE);
        int size = DATAGRAM_MAX_SIZE;

        /* Loop through slices */
        for(i = 0; i < nb_packets; i++) 
        {           
            if(i >0 && i == nb_packets-1) size = data.length - i * DATAGRAM_MAX_SIZE;

            /* Set additional header */
            byte[] data2 = new byte[HEADER_SIZE + size];
            data2[0] = (byte)frame_nb;
            data2[1] = (byte)nb_packets;
            data2[2] = (byte)i;
            data2[3] = (byte)(size >> 8);
            data2[4] = (byte)size;

            /* Copy current slice to byte array */
            System.arraycopy(data, i * DATAGRAM_MAX_SIZE, data2, HEADER_SIZE, size);        

            try 
            {           
                size_p = data2.length;
                DatagramPacket packet = new DatagramPacket(data2, size_p, serverAddr, 9000);
                socket.send(packet);

3.i receive the data on android mobile

while (true) 
        {           

            try {
                socket.receive(packet);
                System.out.println("已经收到信息了!!!");
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }               
            byte[] data = packet.getData();         
            int frame_nb = (int)data[0];
            int nb_packets = (int)data[1];
            int packet_nb = (int)data[2];
            int size_packet = (int) ((data[3] & 0xff) << 8 | (data[4] & 0xff)); 

            if((packet_nb==0) && (current_frame != frame_nb))
            {
                current_frame = frame_nb;
                slicesStored = 0;               
                imageData = new byte[nb_packets * DATA_MAX_SIZE];
            }

            if(frame_nb == current_frame)
            {
                    System.arraycopy(data, HEADER_SIZE, imageData, packet_nb * DATA_MAX_SIZE, size_packet);
                    slicesStored++;             
            }

            /* If image is complete display it */
            if (slicesStored == nb_packets) 
            {                   
                ByteArrayInputStream bis = new ByteArrayInputStream(imageData);

            }

And my question is : how i can display the ByteArrayInputStream bis data on android mobile... Thank you for reply!

Appendectomy

Well what type of object are you looking for on the client side? I'd expect it to have a constructor or factory method taking InputStream, or possibly taking something else which has a constructor taking an InputStream. – Atomicity

Do you mean to say that you want to convert the ByteArrayInputStream to a Bitmap image?? – Unfolded

yes,i mean convert the ByteArrayInputStream to a Bitmap image – Appendectomy

Answer 1

In order to convert ByteArrayInputStream to a jpeg image you can simply use the following code:

    ByteArrayInputStream bis = new ByteArrayInputStream(imageData);
    Bitmap bp=BitmapFactory.decodeStream(bis); //decode stream to a bitmap image
    yourImageView.setImageBitmap(bp); //set the JPEG image in your image view

Hope this helps.. Thanks..

Unfolded

hello, i mean display bitmap one by one . it looks like a video. what can i do? – Appendectomy

@纯洁的坏蛋 i know its very late, but did you get to know how to show it as a video? – Synapsis

#62432902 please see my question – Underskirt