Project Structure Complete. A better Main Screen

app/build.gradle

@@ -33,6 +33,7 @@ dependencies {
     compile 'com.android.support.constraint:constraint-layout:1.0.0-alpha8'
     compile 'com.squareup.retrofit2:retrofit:2.3.0'
     compile 'com.squareup.retrofit2:converter-gson:2.3.0'
+    compile 'com.squareup.picasso:picasso:2.5.2'
     testCompile 'junit:junit:4.12'
 }
 repositories {

app/src/main/AndroidManifest.xml

@@ -21,7 +21,10 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
-        <activity android:name=".activities.TodosActivity"></activity>
+        <activity android:name=".activities.TodosActivity" />
+        <activity android:name=".activities.AlbumActivity" />
+        <activity android:name=".activities.LargeImageActivity" />
+        <activity android:name=".activities.PhotoActivity"></activity>
     </application>
 
 </manifest>

app/src/main/java/com/codingblocks/restapiretrofitjson/MainActivity.kt

@@ -3,6 +3,7 @@ package com.codingblocks.restapiretrofitjson
 import android.content.Intent
 import android.support.v7.app.AppCompatActivity
 import android.os.Bundle
+import com.codingblocks.restapiretrofitjson.activities.AlbumActivity
 import com.codingblocks.restapiretrofitjson.activities.PostsActivity
 import com.codingblocks.restapiretrofitjson.activities.TodosActivity
 import com.codingblocks.restapiretrofitjson.activities.UsersActivity
@@ -15,18 +16,22 @@ class MainActivity : AppCompatActivity() {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
 
-        btnPosts.setOnClickListener({
+        iv_Posts.setOnClickListener({
             startActivity(Intent(this@MainActivity, PostsActivity::class.java))
         })
 
-        btnUsers.setOnClickListener({
+        iv_user.setOnClickListener({
             startActivity(Intent(this@MainActivity, UsersActivity::class.java))
         })
 
-        btnTodos.setOnClickListener({
+        iv_Todos.setOnClickListener({
             startActivity(Intent(this@MainActivity, TodosActivity::class.java))
         })
 
+        iv_Albums.setOnClickListener ({
+            startActivity(Intent(this@MainActivity,AlbumActivity::class.java))
+        })
+
 
     }
 }

app/src/main/java/com/codingblocks/restapiretrofitjson/activities/AlbumActivity.java

@@ -0,0 +1,67 @@
+package com.codingblocks.restapiretrofitjson.activities;
+
+import android.content.Intent;
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
+import android.view.View;
+
+import com.codingblocks.restapiretrofitjson.R;
+import com.codingblocks.restapiretrofitjson.adapters.AlbumAdapter;
+import com.codingblocks.restapiretrofitjson.api.API;
+import com.codingblocks.restapiretrofitjson.api.AlbumAPI;
+import com.codingblocks.restapiretrofitjson.interfaces.OnItemClickListener;
+import com.codingblocks.restapiretrofitjson.models.Album;
+
+import java.util.ArrayList;
+
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
+
+public class AlbumActivity extends AppCompatActivity {
+
+    public static final String TAG = "alb_act";
+
+    RecyclerView rvalbum;
+    AlbumAdapter albumAdapter;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_album);
+
+        rvalbum = (RecyclerView)findViewById(R.id.rv_album);
+        rvalbum.setLayoutManager(new LinearLayoutManager(this));
+
+        albumAdapter = new AlbumAdapter(this,new ArrayList<Album>());
+        rvalbum.setAdapter(albumAdapter);
+
+        albumAdapter.setOnItemClickListener(new OnItemClickListener() {
+            @Override
+            public void onItemClick(int itemId, View view) {
+                Intent i = new Intent(AlbumActivity.this,PhotoActivity.class);
+                i.putExtra("albumId",itemId);
+                startActivity(i);
+            }
+        });
+
+        AlbumAPI albumAPI = API.getInstance().getAlbumAPI();
+
+        Callback<ArrayList<Album>> albumcallback = new Callback<ArrayList<Album>>() {
+            @Override
+            public void onResponse(Call<ArrayList<Album>> call, Response<ArrayList<Album>> response) {
+                albumAdapter.updateAlbum(response.body());
+            }
+
+            @Override
+            public void onFailure(Call<ArrayList<Album>> call, Throwable t) {
+
+            }
+        };
+
+        int albumIdRecived = getIntent().getIntExtra("userId",-1);
+        albumAPI.getAlbum().enqueue(albumcallback);
+    }
+}

app/src/main/java/com/codingblocks/restapiretrofitjson/activities/LargeImageActivity.java

@@ -0,0 +1,35 @@
+package com.codingblocks.restapiretrofitjson.activities;
+
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import com.codingblocks.restapiretrofitjson.R;
+import com.squareup.picasso.Picasso;
+
+public class LargeImageActivity extends AppCompatActivity {
+
+    ImageView largeimage;
+    TextView title_largeimage;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_large_image);
+
+        largeimage = (ImageView) findViewById(R.id.iv_largeimage);
+        title_largeimage = (TextView) findViewById(R.id.tv_largeimage_title);
+
+        String imageUrlRecived = getIntent().getStringExtra("photoURL");
+        if(imageUrlRecived != null){
+            Picasso.with(LargeImageActivity.this).load(imageUrlRecived).error(R.drawable.no_image).into(largeimage);
+        }
+
+        String imagetitleRecived = getIntent().getStringExtra("photoTitle");
+        if(imagetitleRecived != null){
+            title_largeimage.setText(imagetitleRecived);
+        }
+
+    }
+}

app/src/main/java/com/codingblocks/restapiretrofitjson/activities/PhotoActivity.java

@@ -0,0 +1,65 @@
+package com.codingblocks.restapiretrofitjson.activities;
+
+import android.content.Intent;
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
+import android.view.View;
+
+import com.codingblocks.restapiretrofitjson.R;
+import com.codingblocks.restapiretrofitjson.adapters.PhotoAdapter;
+import com.codingblocks.restapiretrofitjson.api.API;
+import com.codingblocks.restapiretrofitjson.api.PhotoAPI;
+import com.codingblocks.restapiretrofitjson.interfaces.OnItemClickListener;
+import com.codingblocks.restapiretrofitjson.models.Photo;
+
+import java.util.ArrayList;
+
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
+
+public class PhotoActivity extends AppCompatActivity {
+
+    RecyclerView rvPhotos;
+    PhotoAdapter photoAdapter;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_photo);
+
+        rvPhotos = (RecyclerView) findViewById(R.id.rv_photo);
+        rvPhotos.setLayoutManager(new LinearLayoutManager(this));
+
+        photoAdapter = new PhotoAdapter(this,new ArrayList<Photo>());
+        rvPhotos.setAdapter(photoAdapter);
+
+        photoAdapter.setOnItemClickListener(new OnItemClickListener() {
+            @Override
+            public void onItemClick(int itemId, View view) {
+                Intent fullImageActIntent=new Intent(PhotoActivity.this,LargeImageActivity.class);
+                fullImageActIntent.putExtra("photoURL",photoAdapter.getPhotos().get(itemId-1).getUrl());
+                fullImageActIntent.putExtra("photoTitle",photoAdapter.getPhotos().get(itemId-1).getTitle());
+                startActivity(fullImageActIntent);
+            }
+        });
+
+        PhotoAPI photoAPI = API.getInstance().getPhotoAPI();
+        Callback<ArrayList<Photo>> photocallback = new Callback<ArrayList<Photo>>() {
+            @Override
+            public void onResponse(Call<ArrayList<Photo>> call, Response<ArrayList<Photo>> response) {
+                photoAdapter.updatephotolist(response.body());
+            }
+
+            @Override
+            public void onFailure(Call<ArrayList<Photo>> call, Throwable t) {
+
+            }
+        };
+
+        int albumIdReceived = getIntent().getIntExtra("albumId", -1);
+        photoAPI.getPhotos().enqueue(photocallback);
+    }
+}

app/src/main/java/com/codingblocks/restapiretrofitjson/activities/PostsActivity.java

@@ -36,8 +36,10 @@ protected void onCreate(Bundle savedInstanceState) {
 
         rvPostsList = (RecyclerView) findViewById(R.id.rvPostsList);
         rvPostsList.setLayoutManager(new LinearLayoutManager(this));
+
         postAdapter = new PostAdapter(this, new ArrayList<Post>());
         rvPostsList.setAdapter(postAdapter);
+
         postAdapter.setOnItemClickListener(new OnItemClickListener() {
             @Override
             public void onItemClick(int itemId, View view) {

app/src/main/java/com/codingblocks/restapiretrofitjson/adapters/AlbumAdapter.java

@@ -0,0 +1,90 @@
+package com.codingblocks.restapiretrofitjson.adapters;
+
+import android.content.Context;
+import android.support.v7.widget.RecyclerView;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+import com.codingblocks.restapiretrofitjson.R;
+import com.codingblocks.restapiretrofitjson.interfaces.OnItemClickListener;
+import com.codingblocks.restapiretrofitjson.models.Album;
+
+import org.w3c.dom.Text;
+
+import java.util.ArrayList;
+
+/**
+ * Created by ravneet on 2/7/17.
+ */
+
+public class AlbumAdapter extends RecyclerView.Adapter<AlbumAdapter.AlbumViewHolder> {
+
+    public static final String TAG = "alb_adp";
+
+    private Context context;
+    private ArrayList<Album> albumlist;
+    private OnItemClickListener onItemClickListener;
+
+    public void setOnItemClickListener(OnItemClickListener onItemClickListener) {
+        this.onItemClickListener = onItemClickListener;
+    }
+
+    public AlbumAdapter(Context context,ArrayList<Album> albumlist){
+        this.albumlist = albumlist;
+        this.context = context;
+    }
+
+    public void updateAlbum(ArrayList<Album> albumlist){
+        this.albumlist = albumlist;
+        notifyDataSetChanged();
+    }
+
+    @Override
+    public AlbumViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
+
+        Log.i(TAG, "onCreateViewHolder: ");
+
+        LayoutInflater li = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
+        View itemview = li.inflate(R.layout.list_item_album,parent,false);
+        return new AlbumViewHolder(itemview);
+    }
+
+    @Override
+    public void onBindViewHolder(AlbumViewHolder holder, int position) {
+
+        Log.i(TAG, "onBindViewHolder: ");
+
+        final Album thisalbum = albumlist.get(position);
+
+        holder.albumTitle.setText(thisalbum.getTitle());
+        holder.thisview.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                if(onItemClickListener != null){
+                    onItemClickListener.onItemClick(thisalbum.getId(),view);
+                }
+            }
+        });
+
+    }
+
+    @Override
+    public int getItemCount() {
+        return albumlist.size();
+    }
+
+    class AlbumViewHolder extends RecyclerView.ViewHolder{
+        TextView albumTitle;
+        View thisview;
+
+        public AlbumViewHolder(View itemView) {
+            super(itemView);
+            thisview = itemView;
+            albumTitle = (TextView) itemView.findViewById(R.id.tv_album_title);
+
+        }
+    }
+}