How to Set Progress Bar in Android

Progress Bar

Progress Bar is helpful for check on downloading process or loading any content to open in our app. Let us see an Example for Progress Bar.

MainActivity.java

Add Progress Bar to activity file with the following methods

    package com.example.codebridgeprogressbarexample;  
    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 btnProgressBar;  
        ProgressDialog progressDialog;  
        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() {  
            btnProgressBar= (Button) findViewById(R.id.btn_download);  
            btnProgressBar.setOnClickListener(new OnClickListener(){  
       
               @Override  
               public void onClick(View v) {  
                // creating progress bar dialog  
                progressDialog= new ProgressDialog(v.getContext());  
                progressDialog.setCancelable(true);  
                progressDialog.setMessage("File downloading ...");  
                progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);  
                progressDialog.setProgress(0);  
                progressDialog.setMax(100);  
                progressDialog.show();  
                //reset progress bar and filesize status  
                progressBarStatus = 0;  
                fileSize = 0;  
       
                new Thread(new Runnable() {  
                  public void run() {  
                    while (progressBarStatus < 100) { // performing operation progressBarStatus = doOperation(); try {Thread.sleep(1000);} catch (InterruptedException e) {e.printStackTrace();} // Updating the progress bar progressBarHandler.post(new Runnable() { public void run() { progressDialog.setProgress(progressBarStatus); } }); } // performing operation if file is downloaded, if (progressBarStatus >= 100) {  
                        // sleeping for 1 second after operation completed  
                        try {Thread.sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}  
                        // close the progress bar dialog  
                        progressDialog.dismiss();  
                    }  
                  }  
                 }).start();  
                }//end of onClick method  
              });  
             }  
        // checking how much file is downloaded and updating the filesize   
        public int doOperation() {  
            //The range of ProgressDialog starts from 0 to 10000  
            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;//you can add more else if  
                } else{  
                    return 100;  
                }  
            }//end of while  
            return 100;  
        }//end of doOperation  
      
        @Override  
        public boolean onCreateOptionsMenu(Menu menu) {  
            // Inflate the menu; this adds items to the action bar if it is present.  
            getMenuInflater().inflate(R.menu.main, menu);  
            return true;  
        }  
    }