Networking is one of the most important parts of Android application development.
Modern Android applications frequently communicate with:
- REST APIs
- Cloud servers
- Authentication systems
- JSON endpoints
- Real-time services
Google introduced the Volley Networking Library to simplify network communication in Android applications.
Volley handles:
- Asynchronous requests
- Request queuing
- Caching
- Error handling
- Image loading
- Network prioritization
What Is Volley?
Volley is an HTTP networking library developed by Google for Android applications.
It was designed to make:
- API requests easier
- Network calls faster
- Code cleaner
- Asynchronous operations simpler
Why Use Volley?
Volley provides:
- Automatic asynchronous networking
- Efficient request queue management
- Built-in caching
- Easy JSON handling
- Request cancellation
- Retry policies
Volley Features
- Request queuing and prioritization
- Efficient memory management
- Automatic caching
- Network request cancellation
- Easy customization
- Fast API integration
What We Will Build
In this tutorial:
- Create a Volley Android project
- Fetch GitHub API data
- Make asynchronous API requests
- Handle API responses
- Handle networking errors
Step 1 — Create Android Project
Open Android Studio and create:
Empty Activity
using:
- Java
- Minimum SDK 21+
Step 2 — Add Volley Dependency
Inside:
build.gradle
Add:
implementation
'com.android.volley:volley:1.2.1'
Why Use Latest Volley Version?
Modern Android applications should always use updated library versions for:
- Security fixes
- Performance improvements
- Bug fixes
- Android compatibility
Step 3 — Add Internet Permission
Inside:
AndroidManifest.xml
Add:
<uses-permission
android:name=
"android.permission.INTERNET"/>
Modernized AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest
xmlns:android=
"http://schemas.android.com/apk/res/android">
<uses-permission
android:name=
"android.permission.INTERNET"/>
<application
android:allowBackup="true"
android:supportsRtl="true"
android:theme="@style/Theme.VolleyApp">
<activity
android:name=".MainActivity"
android:exported="true">
<intent-filter>
<action
android:name=
"android.intent.action.MAIN"/>
<category
android:name=
"android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
</application>
</manifest>
Step 4 — Create activity_main.xml
Create:
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:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical">
<TextView
android:id="@+id/textResult"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Waiting for API response"
android:textSize="18sp"
android:padding="16dp"/>
</LinearLayout>
Step 5 — Create MainActivity.java
Create:
package com.example.volleyexample;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
import android.widget.Toast;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;
public class MainActivity
extends AppCompatActivity {
private static final String URL =
"https://api.github.com/users";
private TextView textResult;
@Override
protected void onCreate(
Bundle savedInstanceState
) {
super.onCreate(savedInstanceState);
setContentView(
R.layout.activity_main
);
textResult =
findViewById(R.id.textResult);
fetchGitHubUsers();
}
private void fetchGitHubUsers() {
StringRequest request =
new StringRequest(
Request.Method.GET,
URL,
new Response.Listener<String>() {
@Override
public void onResponse(
String response
) {
Log.d(
"API_RESPONSE",
response
);
textResult.setText(
"Data Loaded Successfully"
);
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(
VolleyError error
) {
Toast.makeText(
MainActivity.this,
"Something went wrong",
Toast.LENGTH_SHORT
).show();
Log.e(
"VOLLEY_ERROR",
error.toString()
);
}
}
);
RequestQueue queue =
Volley.newRequestQueue(this);
queue.add(request);
}
}
How This Volley Example Works
- Volley creates network request
- Request added into RequestQueue
- Volley executes asynchronously
- Response callback returns API data
- Error callback handles failures
Why Volley Is Better Than AsyncTask Networking
| AsyncTask Networking | Volley |
|---|---|
| Manual threading | Automatic async execution |
| More boilerplate code | Cleaner implementation |
| No built-in caching | Automatic caching |
| Harder error handling | Centralized error callbacks |
Volley Request Types
- StringRequest
- JsonObjectRequest
- JsonArrayRequest
- ImageRequest
- Custom Requests
Example JsonObjectRequest
JsonObjectRequest request =
new JsonObjectRequest(
Request.Method.GET,
url,
null,
response -> {
},
error -> {
}
);
Modern Android Networking Recommendation
Although Volley is still useful, modern Android applications commonly use:
- Retrofit
- OkHttp
- Kotlin Coroutines
- Flow
- MVVM Architecture
Volley vs Retrofit
| Volley | Retrofit |
|---|---|
| Simple networking | Advanced REST APIs |
| Manual parsing often needed | Automatic serialization |
| Good for lightweight APIs | Best for scalable APIs |
Common Beginner Mistakes
1. Forgetting Internet Permission
Without:
android.permission.INTERNET
network requests will fail.
2. Creating Multiple RequestQueues
Production applications should use:
- Singleton RequestQueue
for better performance.
3. Not Handling Errors Properly
Always handle:
- No internet
- Timeouts
- API failures
- Server errors
Advanced Volley Features
- Retry policies
- Request cancellation
- Custom headers
- Authentication tokens
- POST requests
- Multipart uploads
- Caching strategies
FAQ
Is Volley still used in Android?
Yes. Volley is still useful for lightweight networking and simple APIs.
Can Volley parse JSON?
Yes. Volley supports:
- JSON Objects
- JSON Arrays
- String responses
What is the modern alternative to Volley?
Retrofit with Kotlin Coroutines is the modern Android networking standard.
Conclusion
Volley simplifies networking operations in Android applications by handling asynchronous requests, caching, and response management automatically.
It is an excellent library for beginners learning API communication and Android networking fundamentals.
Modern Android applications should additionally use MVVM architecture, Retrofit, lifecycle-aware components, and Kotlin Coroutines for scalable production-grade networking systems.
About the Author
Salil Jha is a Full Stack and Mobile Developer specializing in Android, React Native, fintech systems, scalable SaaS platforms, and developer tooling products.
CodeChain Dev — Build Modern Products. Solve Real Problems.
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