Android Program : Create an Android application to demonstrate Progress Dialog Box using AsyncTask.

 

Create an Android application to demonstrate Progress Dialog Box using  AsyncTask

Soln :

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text=" Start ProgressDialog"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="57dp" />

</RelativeLayout>

MainActivity.java

package com.example.slipap1b;

import androidx.appcompat.app.AppCompatActivity;

import android.app.ProgressDialog;
import android.graphics.Bitmap;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {
    Button button;
    ProgressDialog progressDoalog;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button = (Button) findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                new MyAsyncTask().execute();
            }


        });

    }

    private class MyAsyncTask extends AsyncTask {
        ProgressDialog progressDialog;


        Handler handle = new Handler() {
            @Override
            public void handleMessage(Message msg) {
                super.handleMessage(msg);
                progressDoalog.incrementProgressBy(1);
            }
        };

        @Override
        protected Object doInBackground(Object[] objects) {
            return null;
        }

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            progressDoalog = new ProgressDialog(MainActivity.this);
            progressDoalog.setMax(100);
            progressDoalog.setMessage("Its loading....");
            progressDoalog.setTitle("ProgressDialog bar example");
            progressDoalog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
            progressDoalog.show();
            new Thread(new Runnable() {
                @Override
                public void run() {
                    try {
                        while (progressDoalog.getProgress() <= progressDoalog
                                .getMax()) {
                            Thread.sleep(200);
                            handle.sendMessage(handle.obtainMessage());
                            if (progressDoalog.getProgress() == progressDoalog
                                    .getMax()) {
                                progressDoalog.dismiss();
                            }
                        }
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
            }).start();progressDoalog = new ProgressDialog(MainActivity.this);
            progressDoalog.setMax(100);
            progressDoalog.setMessage("Its loading....");
            progressDoalog.setTitle("ProgressDialog bar example");
            progressDoalog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
            progressDoalog.show();
            new Thread(new Runnable() {
                @Override
                public void run() {
                    try {
                        while (progressDoalog.getProgress() <= progressDoalog
                                .getMax()) {
                            Thread.sleep(200);
                            handle.sendMessage(handle.obtainMessage());
                            if (progressDoalog.getProgress() == progressDoalog
                                    .getMax()) {
                                progressDoalog.dismiss();
                            }
                        }
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
            }).start();
        }

    }

}

ScreenShot