로딩바 사용시 작업마다 실행되는 건가요??

Question

소스가 이해가 안되서.. oncreate문에 저렇게 작성하면

작업이 길어질때 로딩바가 출력되는건가요??

 

import android.app.Activity;

import android.app.ProgressDialog;

import android.os.AsyncTask;

import android.os.Bundle;

 

public class ProgressDialogActivity extends Activity {

 

    @Override

    protected void onCreate(Bundle savedInstanceState) {

 

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_progress_dialog);

 

        CheckTypesTask task = new CheckTypesTask();

        task.execute();

    }

 

    private class CheckTypesTask extends AsyncTask<Void, Void, Void> {

         

        ProgressDialog asyncDialog = new ProgressDialog(

                ProgressDialogActivity.this);

 

        @Override

        protected void onPreExecute() {

            asyncDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);

            asyncDialog.setMessage("로딩중입니다..");

             

            // show dialog

            asyncDialog.show();

            super.onPreExecute();

        }

 

        @Override

        protected Void doInBackground(Void... arg0) {

            try {

                for (int i = 0; i < 5; i++) {

                    //asyncDialog.setProgress(i * 30);

                    Thread.sleep(500);

                }

            } catch (InterruptedException e) {

                e.printStackTrace();

            }

            return null;

        }

 

        @Override

        protected void onPostExecute(Void result) {

            asyncDialog.dismiss();

            super.onPostExecute(result);

        }

    }

}

Answer 1

작업이 길어지는거와 상관 없이 그냥 task 시작하자마자 다이얼로그 띄우도록 되어 있네요.

onPreExecute() 함수는 Task 시작할때 동작하는 함수입니다.