CODEWITHSUNDEEP
javaandroid
user222
user222

Reputation: 191

How can I specify publishProgress() to be called after x seconds inside a loop?

I was looking for a way to call publishProgress() after x seconds in a loop statement due to Garbage Collector being called a lot of times.

This is what I have:

protected Void doInBackground(Void... parms) {

    Long size = source.length();

    InputStream input = new FileInputStream(source);
    OutputStream output = new FileOutputStream(destination);

    // Transfer bytes from input to output
    byte[] buf = new byte[1024];

    int len;

    long written = 0;

    while ((len = input.read(buf)) > 0)
    {
        output.write(buf, 0, len);

        written += 1024;

        //This should be called after x seconds
        publishProgress((int) (written * 100 / size));
    }

    input.close();
    output.close();
}

I have found ScheduledExecutorService but I don't know how to implement it inside while loop.

Upvotes: 2

Views: 125

Answers (3)

Karioki
Karioki

Reputation: 664

This solution will not block UI thread, As it use AsyncTask

  Long size = source.length();
        InputStream input = new FileInputStream(source);
        OutputStream output = new FileOutputStream(destination);

            // Transfer bytes from input to output
            byte[] buf = new byte[1024];

            int len;

            long written = 0;

            while ((len = input.read(buf)) > 0) {
                output.write(buf, 0, len);

                written += 1024;

                Long size = source.length();

                InputStream input = new FileInputStream(source);
                OutputStream output = new FileOutputStream(destination);

                // Transfer bytes from input to output
                byte[] buf = new byte[1024];

                int len;

                long written = 0;

                while ((len = input.read(buf)) > 0) {
                    output.write(buf, 0, len);

                    written += 1024;

                    (new AsyncTask<Void, Void, Void>() {
                        @Override
                        protected Void doInBackground(Void... parms) {
                            mEventDataSource.deleteAll();
                            try {
                                Thread.currentThread().sleep(x * 1000);
                            } catch (InterruptedException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                            }
                            return null;
                        }

                        @Override
                        protected void onPostExecute(Void result) {
                            // This should be called after x seconds
                            publishProgress((int) (written * 100 / size));
                        }
                    }).execute();

                }

                input.close();
                output.close();

Upvotes: 2

user3322955
user3322955

Reputation: 348

You can use CountdownTimer class as follows, 

while ((len = input.read(buf)) > 0)
{
    output.write(buf, 0, len);

    written += 1024;

    // will call publicshProgress after 30 seconds.
    new CountDownTimer(30000, 1000) 
    {
         public void onTick(long millisUntilFinished) {}

         public void onFinish() 
         {
                 //This should be called after x seconds
             publishProgress((int) (written * 100 / size));
          }
      }.start();
}

Upvotes: 0

Sonali8890
Sonali8890

Reputation: 2005

put this line inside loop

 handler.postDelayed(runnable, x);

and this in your activity

Runnable runnable = new Runnable() {

    @Override
    public void run() {

        publishProgress((int) (written * 100 / size));

    }
};


Handler handler = new Handler();

Upvotes: 2

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