Progress Bar Android App Using Android Studio

Introduction

In this article, I will show you how to create a Progress Bar Android app using Android Studio. We can display the Android progress bar dialog box to display the status of the work being done, e.g., downloading a file or analyzing the status of work etc.

 Requirements

• Android Studio version 2.3.3
• Little bit XML and JAVA knowledge.
• Android Emulator (or) Android mobile
• Download link (Android Studio)

Steps should be followed

Follow these steps to create Progress Bar app using Android Studio. I have attached the source code too.

Step 1

Open Android Studio and start a New Android Studio Project.

Step 2

You can choose your application name and choose where your project is stored. If you wish to use C++ for coding the project, mark the "Include C++ support", and click "Next" button.

Step 3

Now, select the version of Android and select the target Android devices. We need to choose the SDK level which plays an important role to run the application.

Step 4

Now, add the activity and click "Next" button.

Step 5

Add Activity name and click "Finish". 

Step 6

Go to activity_main.xml, This XML file contains the designing code for our Android app.

The XML code is given below.  

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="116dp"
        android:text="download file" />

</RelativeLayout>

Step 7

Go to Main Activity.java. This Java program is the backend language for Android.

The java code is given below.

package abu.progressbar;

import android.app.Activity;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.os.Handler;
import android.widget.Button;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
public class MainActivity extends Activity {
    Button btnStartProgress;
    ProgressDialog progressBar;
    private int progressBarStatus = 0;
    private Handler progressBarHandler = new Handler();
    private long fileSize = 0;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        addListenerOnButtonClick();
    }
    public void addListenerOnButtonClick() {
        btnStartProgress = (Button) findViewById(R.id.button1);
        btnStartProgress.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View v) {

                progressBar = new ProgressDialog(v.getContext());
                progressBar.setCancelable(true);
                progressBar.setMessage("File downloading ...");
                progressBar.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
                progressBar.setProgress(0);
                progressBar.setMax(100);
                progressBar.show();

                progressBarStatus = 0;
                fileSize = 0;

                new Thread(new Runnable() {
                    public void run() {
                        while (progressBarStatus < 100) {

                            progressBarStatus = doOperation();
                            try {Thread.sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}
                            progressBarHandler.post(new Runnable() {
                                public void run() {
                                    progressBar.setProgress(progressBarStatus);
                                }
                            });
                        }

                        if (progressBarStatus >= 100) {
                            try {Thread.sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}
                            progressBar.dismiss();
                        }
                    }
                }).start();
            }
        });
    }

    public int doOperation() {

        while (fileSize <= 10000) {
            fileSize++;
            if (fileSize == 1000) {
                return 10;
            } else if (fileSize == 2000) {
                return 20;
            } else if (fileSize == 3000) {
                return 30;
            } else if (fileSize == 4000) {
                return 40;
            } else{
                return 100;
            }
        }
        return 100;
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {

        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

}

Step 8

Now, go to menu bar and click "make project" or press ctrl+f9 to debug the error.

Step 9

Then, click the Run button or press shift+f10 to run the project. Choose the virtual machine option and click OK.

Conclusion

We have successfully created the Progress Bar Android application using Android Studio.