How to display progress dialog before starting an activity in Android?

This example demonstrates how do I to display progress dialog before starting an activity in android.

Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.

Step 2 − Add the following code to res/layout/activity_main.xml.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
   android:orientation="vertical"
   android:padding="4dp"
   tools:context=".MainActivity">
   <TextView
      android:layout_marginTop="30dp"
      android:text="Showing Progress dialog before starting the activity in Android.."
      android:textStyle="bold"
      android:textSize="24sp"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"/>
</LinearLayout>

Step 3 − Add the following code to src/MainActivity.java

import androidx.appcompat.app.AppCompatActivity;
import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.os.Bundle;
public class MainActivity extends AppCompatActivity {
   ProgressDialog progressDialog;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      progressDialog = new ProgressDialog(this);
      progressDialog.setTitle("Content Loader");
      progressDialog.setProgress(10);
      progressDialog.setMax(100);
      progressDialog.setMessage("Loading...");
      new MyTask().execute();
   }
   public class MyTask extends AsyncTask<Void, Void, Void> {
      public void onPreExecute() {
         progressDialog.show();
      }
      public Void doInBackground(Void... unused) {
         return null;
      }
   }
}

Step 4 − Add the following code to androidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="app.com.sample">
   <application
      android:allowBackup="true"
      android:icon="@mipmap/ic_launcher"
      android:label="@string/app_name"
      android:roundIcon="@mipmap/ic_launcher_round"
      android:supportsRtl="true"
      android:theme="@style/AppTheme">
      <activity android:name=".MainActivity">
         <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
         </intent-filter>
      </activity>
   </application>
</manifest>

Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from the android studio, open one of your project's activity files and click Run  icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen −

Click here to download the project code.