How to dismiss the dialog with the click on outside of the dialog box in android?

This example demonstrates how do I dismiss the dialog with the click on outside of the dialog box 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"
   android:layout_width = "match_parent"
   android:gravity = "center"
   android:layout_height = "match_parent">
   <TextView
      android:id = "@+id/click"
      android:layout_width = "wrap_content"
      android:textSize = "30sp"
      android:layout_height = "wrap_content"
      android:text = "Click"/>
</LinearLayout>

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

import android.annotation.TargetApi;
import android.content.DialogInterface;
import android.os.Build;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
   TextView text;
   @TargetApi(Build.VERSION_CODES.LOLLIPOP)
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      text = findViewById(R.id.click);
      text.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
            showAlertBox();
         }
      });
   }
   private void showAlertBox() {
      AlertDialog.Builder alertDialog = new AlertDialog.Builder(MainActivity.this);
      alertDialog.setTitle("AlertDialog");
      alertDialog.setMessage("Do you wanna close the dialog box? ");
      alertDialog.setPositiveButton("yes", new DialogInterface.OnClickListener() {
         @Override
         public void onClick(DialogInterface dialog, int which) {
            Toast.makeText(MainActivity.this,"you clicked on yes button",Toast.LENGTH_LONG).show();
         }
      });
      alertDialog.setNegativeButton("No", new DialogInterface.OnClickListener() {
         @Override
         public void onClick(DialogInterface dialog, int which) {
         }
      });
      AlertDialog alert = alertDialog.create();
      alert.setCanceledOnTouchOutside(true);
      alert.show();
   }
}

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="app.com.sample.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 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.