How to use volley string request in android?

This example demonstrate about How to use simple volley request 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:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:gravity="center"    android:layout_height="match_parent"    tools:context=".MainActivity">    <TextView       android:id="@+id/text"       android:textSize="30sp"       android:layout_width="match_parent"       android:layout_height="match_parent" /> </LinearLayout>

In the above code, we have taken text view to show response.

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

package com.example.myapplication; import android.os.Build; import android.os.Bundle; import android.support.annotation.RequiresApi; import android.support.v7.app.AppCompatActivity; 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 {    TextView textView;    RequestQueue queue;    String URL = "http://www.mocky.io/v2/597c41390f0000d002f4dbd1";    @RequiresApi(api = Build.VERSION_CODES.N)    @Override    protected void onCreate(Bundle savedInstanceState) {       super.onCreate(savedInstanceState);       setContentView(R.layout.activity_main);       textView = findViewById(R.id.text);       queue = Volley.newRequestQueue(this);       StringRequest request = new StringRequest(Request.Method.GET, URL, new Response.Listener<String>() {       @Override          public void onResponse(String response) {             textView.setText(response.toString());             Toast.makeText(MainActivity.this,response.toString(),Toast.LENGTH_LONG).show();          }       }, new Response.ErrorListener() {          @Override          public void onErrorResponse(VolleyError error) {         Log.d("error",error.toString());         }       });       queue.add(request);   } }

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="com.example.myapplication">    <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" />             <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />             <category android:name="android.intent.category.LAUNCHER" />          </intent-filter>       </activity> </application> </manifest>

Step 5 − Add the following code to build.gradle

apply plugin: 'com.android.application' android {    compileSdkVersion 28    defaultConfig {       applicationId "com.example.myapplication"       minSdkVersion 15       targetSdkVersion 28       versionCode 1       versionName "1.0"       testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"    }    buildTypes {       release {          minifyEnabled false          proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'       }    } } dependencies { implementation fileTree(dir: 'libs', include: ['*.jar']) implementation 'com.android.volley:volley:1.1.0' implementation 'com.android.support:appcompat-v7:28.0.0' implementation 'com.android.support.constraint:constraint-layout:1.1.3' testImplementation 'junit:junit:4.12' androidTestImplementation 'com.android.support.test:runner:1.0.2' androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2' }

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