Membuat Listview Dengan Json Link Android Studio Java
Hasilnya :
*Artikeln ini Sebagai Pengingat Saya Pribadi
Implementasi
implementation 'com.android.volley:volley:1.2.1'
implementation 'com.squareup.picasso:picasso:2.71828'
Json Yang Ada Pada Link
Link Yang Saya Pakai : https://ranairucreation.000webhostapp.com/data.json
"0" => Array (
"gambar" => "https://ranairucreation.000webhostapp.com/manga/Goblin%20Slayer/judul.jpg",
"judul" => "Goblin Slayer",
"link" => "steavehop.com",
"favorite" => "https://ranairucreation.000webhostapp.com/manga/Goblin%20Slayer/judul.jpg",
"deskripsi" => "Desk : -"
),
"1" => Array (
"gambar" => "https://ranairucreation.000webhostapp.com/manga/Material%20Peak/judul.jpg",
"judul" => "Material Peak",
"link" => "kasurisport.com.com",
"favorite" => "https://ranairucreation.000webhostapp.com/manga/Material%20Peak/judul.jpg",
"deskripsi" => "Desk : -"
),
"2" => Array (
"gambar" => "https://ranairucreation.000webhostapp.com/manga/Max%20Level%20Returner/judul.jpg",
"judul" => "Max Level Returner",
"link" => "awikwok.com",
"favorite" => "https://ranairucreation.000webhostapp.com/manga/Max%20Level%20Returner/judul.jpg",
"deskripsi" => "Desk : -"
),
"3"
Tambahkan DI manifest
<!--permissions for INTERNET--><uses-permission android:name="android.permission.INTERNET"/>
activity_main.xml
Buat Java CourseModal.java<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<!--progress bar for loading indicator-->
<ProgressBar
android:id="@+id/idPB"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true" />
<!--recycler view to display our data-->
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/idRVCourses"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:visibility="gone" />
</RelativeLayout>
Buat Layout Baru course_rv_item.xml
public class CourseModal {
// variables for our course
// name and description.
private String courseName;
private String courseimg;
private String courseMode;
private String courseTracks;
// creating constructor for our variables.
public CourseModal(String courseName, String courseimg, String courseMode, String courseTracks) {
this.courseName = courseName;
this.courseimg = courseimg;
this.courseMode = courseMode;
this.courseTracks = courseTracks;
}
// creating getter and setter methods.
public String getCourseName() {
return courseName;
}
public void setCourseName(String courseName) {
this.courseName = courseName;
}
public String getCourseimg() {
return courseimg;
}
public void setCourseimg(String courseimg) {
this.courseimg = courseimg;
}
public String getCourseMode() {
return courseMode;
}
public void setCourseMode(String courseMode) {
this.courseMode = courseMode;
}
public String getCourseTracks() {
return courseTracks;
}
public void setCourseTracks(String courseTracks) {
this.courseTracks = courseTracks;
}
}
Buat CourseAdapter.java<?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="8dp"
android:elevation="8dp"
app:cardCornerRadius="8dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<!--ImageView to display our course image-->
<ImageView
android:id="@+id/idIVCourse"
android:layout_width="140dp"
android:layout_height="140dp"
android:layout_margin="5dp" />
<!--text view for our course name-->
<LinearLayout
android:layout_width="match_parent"
android:orientation="vertical"
android:layout_height="match_parent">
<TextView
android:id="@+id/idTVCourseName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:padding="5dp"
android:text="Course Name "
android:textColor="@color/black"
android:textSize="18sp"
android:textStyle="bold" />
<!--text view for our batch name-->
<TextView
android:id="@+id/idTVBatch"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:padding="5dp"
android:text="Batch"
android:textColor="@color/black" />
<!--text view to display course tracks-->
<TextView
android:id="@+id/idTVTracks"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:padding="5dp"
android:text="Tracks"
android:textColor="@color/black" />
<Button
android:layout_width="wrap_content"
android:text="Baca"
android:id="@+id/idBaca"
android:layout_height="wrap_content"/>
</LinearLayout>
</LinearLayout>
</androidx.cardview.widget.CardView>
Di MainActivity.java
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import com.squareup.picasso.Picasso;
import java.util.ArrayList;
public class CourseAdapter extends RecyclerView.Adapter<CourseAdapter.ViewHolder> {
// creating a variable for array list and context.
private ArrayList<CourseModal> courseModalArrayList;
private Context context;
// creating a constructor for our variables.
public CourseAdapter(ArrayList<CourseModal> courseModalArrayList, Context context) {
this.courseModalArrayList = courseModalArrayList;
this.context = context;
}
@NonNull
@Override
public CourseAdapter.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
// below line is to inflate our layout.
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.course_rv_item, parent, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull CourseAdapter.ViewHolder holder, int position) {
// setting data to our views of recycler view.
CourseModal modal = courseModalArrayList.get(position);
holder.courseNameTV.setText(modal.getCourseName());
holder.courseTracksTV.setText(modal.getCourseTracks());
holder.courseModeTV.setText(modal.getCourseMode());
Picasso.get().load(modal.getCourseimg()).into(holder.courseIV);
}
@Override
public int getItemCount() {
// returning the size of array list.
return courseModalArrayList.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
// creating variables for our views.
private TextView courseNameTV, courseModeTV, courseTracksTV;
private ImageView courseIV;
public ViewHolder(@NonNull View itemView) {
super(itemView);
// initializing our views with their ids.
courseNameTV = itemView.findViewById(R.id.idTVCourseName);
courseModeTV = itemView.findViewById(R.id.idTVBatch);
courseTracksTV = itemView.findViewById(R.id.idTVTracks);
courseIV = itemView.findViewById(R.id.idIVCourse);
}
}
}
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.os.Bundle;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
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.Volley;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
// creating variables for
// our ui components.
private RecyclerView courseRV;
// variable for our adapter
// class and array list
private CourseAdapter adapter;
private ArrayList<CourseModal> courseModalArrayList;
// below line is the variable for url from
// where we will be querying our data.
String url = "https://ranairucreation.000webhostapp.com/data.json";
private ProgressBar progressBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// initializing our variables.
courseRV = findViewById(R.id.idRVCourses);
progressBar = findViewById(R.id.idPB);
// below line we are creating a new array list
courseModalArrayList = new ArrayList<>();
getData();
// calling method to
// build recycler view.
buildRecyclerView();
}
private void getData() {
// creating a new variable for our request queue
RequestQueue queue = Volley.newRequestQueue(MainActivity.this);
// in this case the data we are getting is in the form
// of array so we are making a json array request.
// below is the line where we are making an json array
// request and then extracting data from each json object.
JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(Request.Method.GET, url, null, new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
progressBar.setVisibility(View.GONE);
courseRV.setVisibility(View.VISIBLE);
for (int i = 0; i < response.length(); i++) {
// creating a new json object and
// getting each object from our json array.
try {
// we are getting each json object.
JSONObject responseObj = response.getJSONObject(i);
// now we get our response from API in json object format.
// in below line we are extracting a string with
// its key value from our json object.
// similarly we are extracting all the strings from our json object.
String courseName = responseObj.getString("judul");
String courseTracks = responseObj.getString("deskripsi");
String courseMode = responseObj.getString("link");
String courseImageURL = responseObj.getString("gambar");
courseModalArrayList.add(new CourseModal(courseName, courseImageURL, courseMode, courseTracks));
buildRecyclerView();
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(MainActivity.this, "Fail to get the data..", Toast.LENGTH_SHORT).show();
}
});
queue.add(jsonArrayRequest);
}
private void buildRecyclerView() {
// initializing our adapter class.
adapter = new CourseAdapter(courseModalArrayList, MainActivity.this);
// adding layout manager
// to our recycler view.
LinearLayoutManager manager = new LinearLayoutManager(this);
courseRV.setHasFixedSize(true);
// setting layout manager
// to our recycler view.
courseRV.setLayoutManager(manager);
// setting adapter to
// our recycler view.
courseRV.setAdapter(adapter);
}
}
