How to ping external IP from java Android?

This example demonstrates how do I ping external IP from java 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"?>
<android.support.constraint.ConstraintLayout
   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">
   <TextView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="Hello World!"
      app:layout_constraintBottom_toBottomOf="parent"
      app:layout_constraintLeft_toLeftOf="parent"
      app:layout_constraintRight_toRightOf="parent"
      app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>

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

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Toast;
import java.io.IOException;
public class MainActivity extends AppCompatActivity {
   Boolean isConnected = false,
   isWiFi = false,
   isMobile = false;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      ConnectivityManager cm = (ConnectivityManager)
         this.getSystemService(Context.CONNECTIVITY_SERVICE);
      NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
      if (activeNetwork != null) {
         isWiFi = activeNetwork.getType() ==
            ConnectivityManager.TYPE_WIFI;
         isMobile = activeNetwork.getType() ==
            ConnectivityManager.TYPE_MOBILE;
         isConnected =
            activeNetwork.isConnectedOrConnecting();
      }
      if (isConnected) {
         if (isWiFi) {
            Toast.makeText(this, "Yes, WiF",
               Toast.LENGTH_SHORT)
               .show();
            if(isConnectedToThisServer("https://www.google.com/")) {
               Toast.makeText(this, "Yes, Connected to
                  Google", Toast.LENGTH_SHORT)
                  .show();
            } else {
               Toast.makeText(this, "No Google
                  Connection", Toast.LENGTH_SHORT)
                  .show();
            }
         }
         if (isMobile) {
            Toast.makeText(this, "Yes, Mobile",
               Toast.LENGTH_SHORT)
               .show();
            if(isConnectedToThisServer("https://www.google.com/")) {
               Toast.makeText(this, "Yes, Connected to
                  Google", Toast.LENGTH_SHORT).show();
            } else {
               Toast.makeText(this, "No Google
               Connection", Toast.LENGTH_SHORT).show();
            }
         }
      } else {
         Toast.makeText(this, "No Network",
         Toast.LENGTH_SHORT).show();
      }
   }
   public boolean isConnectedToThisServer(String host) {
      Runtime runtime = Runtime.getRuntime();
      try {
         Process ipProcess = runtime.exec("/system/bin/ping
            -c 1 8.8.8.8" + host);
         int exitValue = ipProcess.waitFor();
         return (exitValue == 0);
      } catch (IOException e) {
         e.printStackTrace();
      } catch (InterruptedException e) {
         e.printStackTrace();
      }
      return false;
   }
}

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">
   <uses-permission
      android:name="android.permission.ACCESS_NETWORK_STATE" />
   <uses-permission
      android:name="android.permission.INTERNET"/>
   <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 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 −