Links & DependenciesAndroidManifest.xmlactivity_main.xmlMainActivity.java
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.codinginflow.jsonparsingexample"> <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>
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout 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" android:padding="16dp" tools:context="com.codinginflow.jsonparsingexample.MainActivity"> <TextView android:id="@+id/text_view_result" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textColor="@android:color/black" android:textSize="20sp" /> <Button android:id="@+id/button_parse" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_centerHorizontal="true" android:layout_marginBottom="29dp" android:text="parse" /> </RelativeLayout>
package com.codinginflow.jsonparsingexample; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.TextView; 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.JsonObjectRequest; import com.android.volley.toolbox.Volley; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; public class MainActivity extends AppCompatActivity { private TextView mTextViewResult; private RequestQueue mQueue; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mTextViewResult = findViewById(R.id.text_view_result); Button buttonParse = findViewById(R.id.button_parse); mQueue = Volley.newRequestQueue(this); buttonParse.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { jsonParse(); } }); } private void jsonParse() { String url = "https://api.myjson.com/bins/kp9wz"; JsonObjectRequest request = new JsonObjectRequest(Request.Method.GET, url, null, new Response.Listener<JSONObject>() { @Override public void onResponse(JSONObject response) { try { JSONArray jsonArray = response.getJSONArray("employees"); for (int i = 0; i < jsonArray.length(); i++) { JSONObject employee = jsonArray.getJSONObject(i); String firstName = employee.getString("firstname"); int age = employee.getInt("age"); String mail = employee.getString("mail"); mTextViewResult.append(firstName + ", " + String.valueOf(age) + ", " + mail + "\n\n"); } } catch (JSONException e) { e.printStackTrace(); } } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { error.printStackTrace(); } }); mQueue.add(request); } }