如何在后台android中运行无限循环

Question

I have a client in android connected to a server in c++ using TCP sockets. I need my app to constantly send an image to the server. I tried using an infinite(while) loop, but then my app does not do anything else while running the loop, and I need my app to constantly send the image but also be able to run tasks at the same time. this is my code:

    class sendImage implements Runnable{
    @Override
    public void run() {
        while(true){
              try {
                    Bitmap bmp=screenShot();
                    ByteArrayOutputStream bosBitmap = new ByteArrayOutputStream(); 
                    bmp.compress(CompressFormat.JPEG, 50, bosBitmap); 
                    byte[] arrayBitmap = bosBitmap.toByteArray();   

                    OutputStream os = socket.getOutputStream();
                    BufferedOutputStream bos = new BufferedOutputStream(socket.getOutputStream());
                    DataOutputStream dos = new DataOutputStream(bos);
                    dos = new DataOutputStream(os);
                    dos.write(arrayBitmap, 0, arrayBitmap.length);
                    dos.flush();
                    memecontentView.destroyDrawingCache();  
            } catch (UnknownHostException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }       
    }
}

and when I click a button this is how I initialize the thread

public void onClick(View view) {
    new Thread(new sendImage()).start();
}

But when I click the button, the image is sent but it does not allow me to do anything else, if I press another button, my app closes How can I run an infinite loop that allows my app to perform other tasks at the same time?

Answer 1

如果您需要长时间保持线程运行，强烈建议您使用java.util.concurrent包提供的各种API，例如Executor，ThreadPoolExecutor和FutureTask。

Answer 2

I post my solution if somebody finds it helpful I just implemented an AsyncTask, it works great:

public class SendImage extends AsyncTask<Void,Void,Void>{
    @Override
    protected Void doInBackground(Void... arg0){
        while(true){
              try {
                    Bitmap bmp=screenShot();
                    ByteArrayOutputStream bosBitmap = new ByteArrayOutputStream(); 
                    bmp.compress(CompressFormat.JPEG, 30, bosBitmap); 
                    byte[] arrayBitmap = bosBitmap.toByteArray();   

                    OutputStream os = socket.getOutputStream();
                    BufferedOutputStream bos = new BufferedOutputStream(socket.getOutputStream());
                    DataOutputStream dos = new DataOutputStream(bos);
                    dos = new DataOutputStream(os);
                    dos.write(arrayBitmap, 0, arrayBitmap.length);
                    dos.flush();
                    memecontentView.destroyDrawingCache();  
            } catch (UnknownHostException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }       
    }
}