AsyncTask 예제 ( + ProgressDialog )

package com.lety.myasynctaskdemo2;

import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.os.AsyncTask;
import android.util.Log;
import android.widget.Toast;

/** * Created by lety02 on 2017. 11. 27.. */
public class MyAsyncTask extends AsyncTask<Void, Integer, String>{

    Context ctx;
    ProgressDialog pd;

    public MyAsyncTask(Context ct) {
        ctx = ct;
    }

    @Override    protected void onPreExecute() {
        pd = new ProgressDialog(ctx);
        pd.setTitle("Downloading");
        pd.setMessage("Wait please...");
        pd.setMax(10);
        pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
        pd.setButton(ProgressDialog.BUTTON_NEGATIVE, "취소", new DialogInterface.OnClickListener()
        {
            @Override           

 public void onClick(DialogInterface dialog, int which) {
                dialog.cancel();
            }
        });
        pd.show();
    }

    @Override   

 protected String doInBackground(Void... params) {

        try        {
            for(int i = 0 ; i <= 10 ; i++)
            {
                Thread.sleep(500);
                Log.i("Thread", "Execute " + i);
                publishProgress(i);
            }
            return "Successful";

        } catch (InterruptedException e) {
            Log.i("Exception", e.getMessage());
            return "Failure";
        }
    }

    @Override  

  protected void onProgressUpdate(Integer... values) {

        int myVal = values[0];
        pd.setProgress(myVal);
    }

    @Override    

protected void onPostExecute(String s) {
        Toast.makeText(ctx, s, Toast.LENGTH_SHORT);
        pd.dismiss();
    }
}