- Main Activity.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:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<Button
android:text="Show Data"
android:id="@+id/showbtn"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<ListView
android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="match_parent"></ListView>
</LinearLayout>
2. mylist.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
android:orientation="vertical"
xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/EmployeeID"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/LastName"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/FirstName"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
3. Employee.java
package com.example.ppc.jsonarraycustomlistview;
public class Employee {
String fname;
String lname;
public Employee() {
}
public Employee( String fname, String lname) {
this.fname = fname;
this.lname = lname;
}
public String getFname() {
return fname;
}
public String getLname() {
return lname;
}
public void setFname(String fname) {
this.fname = fname;
}
public void setLname(String lname) {
this.lname = lname;
}
}
4. CustomAdapter.JAVA
package com.example.ppc.jsonarraycustomlistview;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
import java.util.ArrayList;
public class CustomAdapter extends BaseAdapter {
private Context context;
private ArrayList<Employee> mylist;
public CustomAdapter(Context context, ArrayList<Employee> mylist) {
this.context = context;
this.mylist = mylist;
}
@Override
public int getCount() {
return mylist.size();
}
@Override
public Object getItem(int position) {
return mylist.get(position);
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view= layoutInflater.inflate(R.layout.mylist,null);
TextView firstname = view.findViewById(R.id.FirstName);
TextView lastname = view.findViewById(R.id.LastName);
firstname.setText(mylist.get(position).fname);
lastname.setText(mylist.get(position).lname);
return view;
}
}
5. AndroidManifest.xml Only Need Internet permission
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.ppc.jsonarraycustomlistview">
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<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>
6. Add Volley Library
implementation 'com.android.volley:volley:1.1.1'
7. MainActivity.java
package com.example.ppc.jsonarraycustomlistview;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
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.JsonArrayRequest;
import com.android.volley.toolbox.JsonObjectRequest;
import com.android.volley.toolbox.JsonRequest;
import com.android.volley.toolbox.Volley;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
private ListView listView;
private Button button;
private ArrayList<Employee> mylist = new ArrayList<Employee>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = findViewById(R.id.list);
button = findViewById(R.id.showbtn);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
RequestQueue requestQueue = Volley.newRequestQueue(getApplicationContext());
String url = "https://api.myjson.com/bins/1b9qi3";
JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(Request.Method.GET, url, null, new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
for(int i = 0;i<response.length();i++){
try {
JSONObject jsonObject = response.getJSONObject(i);
String fstname = (String) jsonObject.get("FirstName");
String lstname = (String) jsonObject.get("LastName");
mylist.add(new Employee(fstname,lstname));
} catch (JSONException e) {
e.printStackTrace();
}
}
CustomAdapter customAdapter = new CustomAdapter(MainActivity.this,mylist);
listView.setAdapter(customAdapter);
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
});
requestQueue.add(jsonArrayRequest);
}
});
}
}
OLEETECH 