Convert initial lab1 to kotlin

Author: AliceYuan

app/build.gradle

@@ -1,13 +1,14 @@
 apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android'
 
 android {
-    compileSdkVersion 29
+    compileSdkVersion 30
     buildToolsVersion "29.0.3"
 
     defaultConfig {
         applicationId "com.codepath.uiandgitlab"
         minSdkVersion 19
-        targetSdkVersion 29
+        targetSdkVersion 30
         versionCode 1
         versionName "1.0"
 
@@ -20,16 +21,24 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
     }
-
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
 }
 
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
 
-    implementation 'androidx.appcompat:appcompat:1.1.0'
-    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
-    implementation 'com.squareup.retrofit2:retrofit:2.1.0'
-    implementation 'com.squareup.retrofit2:converter-gson:2.1.0'
+    implementation 'androidx.appcompat:appcompat:1.2.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
+    implementation 'com.squareup.retrofit2:retrofit:2.9.0'
+    implementation 'com.squareup.retrofit2:converter-gson:2.9.0'
     implementation 'androidx.legacy:legacy-support-v4:1.0.0'
-    implementation 'androidx.recyclerview:recyclerview:1.1.0'
+    implementation 'androidx.recyclerview:recyclerview:1.2.0'
+    implementation "androidx.core:core-ktx:1.3.2"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+}
+repositories {
+    mavenCentral()
 }

app/src/main/java/com/codepath/bestsellerlistapp/BestSellerBooksFragment.java

@@ -0,0 +1,66 @@
+package com.codepath.bestsellerlistapp
+
+import android.os.Bundle
+import android.util.Log
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.Toast
+import androidx.core.widget.ContentLoadingProgressBar
+import androidx.fragment.app.Fragment
+import androidx.recyclerview.widget.GridLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import com.codepath.bestsellerlistapp.R.layout
+import com.codepath.bestsellerlistapp.models.BestSellerBook
+import com.codepath.bestsellerlistapp.networking.CallbackResponse
+import com.codepath.bestsellerlistapp.networking.NYTimesApiClient
+
+/**
+ * A fragment representing a list of Items.
+ */
+class BestSellerBooksFragment : Fragment(), OnListFragmentInteractionListener {
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        val view = inflater.inflate(layout.fragment_best_seller_books_list, container, false)
+        val progressBar = view.findViewById<View>(R.id.progress) as ContentLoadingProgressBar
+        val recyclerView = view.findViewById<View>(R.id.list) as RecyclerView
+        val context = view.context
+        recyclerView.layoutManager = GridLayoutManager(context, 2)
+        updateAdapter(progressBar, recyclerView)
+        return view
+    }
+
+    private fun updateAdapter(progressBar: ContentLoadingProgressBar, recyclerView: RecyclerView) {
+        progressBar.show()
+        val nyTimesApiClient = NYTimesApiClient()
+        nyTimesApiClient.getBestSellersList(object : CallbackResponse<List<BestSellerBook>> {
+            override fun onSuccess(models: List<BestSellerBook>) {
+                progressBar.hide()
+                recyclerView.adapter = BestSellerBooksRecyclerViewAdapter(models, this@BestSellerBooksFragment)
+                Log.d("BestSellerBooksFragment", "response successful")
+            }
+
+            override fun onFailure(error: Throwable?) {
+                progressBar.hide()
+                error?.message?.let { message ->
+                    Log.e("BestSellerBooksFragment", message)
+                }
+            }
+        })
+    }
+
+    override fun onItemClick(item: BestSellerBook) {
+        Toast.makeText(context, "test", Toast.LENGTH_LONG).show()
+    }
+
+    companion object {
+        fun newInstance(columnCount: Int): BestSellerBooksFragment {
+            val fragment = BestSellerBooksFragment()
+            val args = Bundle()
+            fragment.arguments = args
+            return fragment
+        }
+    }
+}

app/src/main/java/com/codepath/bestsellerlistapp/BestSellerBooksFragment.kt

@@ -0,0 +1,53 @@
+package com.codepath.bestsellerlistapp
+
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.TextView
+import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.RecyclerView.Adapter
+import androidx.recyclerview.widget.RecyclerView.ViewHolder
+import com.codepath.bestsellerlistapp.BestSellerBooksRecyclerViewAdapter.BookViewHolder
+import com.codepath.bestsellerlistapp.R.id
+import com.codepath.bestsellerlistapp.R.layout
+import com.codepath.bestsellerlistapp.models.BestSellerBook
+
+/**
+ * [RecyclerView.Adapter] that can display a [BestSellerBook] and makes a call to the
+ * specified [OnListFragmentInteractionListener].
+ */
+class BestSellerBooksRecyclerViewAdapter(
+    private val books: List<BestSellerBook>,
+    private val mListener: OnListFragmentInteractionListener?
+) : Adapter<BookViewHolder>() {
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): BookViewHolder {
+        val view = LayoutInflater.from(parent.context)
+            .inflate(layout.fragment_best_seller_book, parent, false)
+        return BookViewHolder(view)
+    }
+
+    override fun onBindViewHolder(holder: BookViewHolder, position: Int) {
+        holder.mItem = books[position]
+        holder.mBookTitle.text = books[position].title
+        holder.mBookAuthor.text = books[position].author
+        holder.mView.setOnClickListener {
+            holder.mItem?.let { book ->
+                mListener?.onItemClick(book)
+            }
+        }
+    }
+
+    override fun getItemCount(): Int {
+        return books.size
+    }
+
+    inner class BookViewHolder(val mView: View) : ViewHolder(mView) {
+        val mBookTitle: TextView = mView.findViewById<View>(id.book_title) as TextView
+        val mBookAuthor: TextView = mView.findViewById<View>(id.book_author) as TextView
+        var mItem: BestSellerBook? = null
+
+        override fun toString(): String {
+            return mBookTitle.toString() + " '" + mBookAuthor.text + "'"
+        }
+    }
+}

app/src/main/java/com/codepath/bestsellerlistapp/BestSellerBooksRecyclerViewAdapter.java

@@ -0,0 +1,16 @@
+package com.codepath.bestsellerlistapp
+
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+import com.codepath.bestsellerlistapp.R.id
+import com.codepath.bestsellerlistapp.R.layout
+
+class MainActivity : AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(layout.activity_main)
+        val supportFragmentManager = supportFragmentManager
+        val fragmentTransaction = supportFragmentManager.beginTransaction()
+        fragmentTransaction.replace(id.content, BestSellerBooksFragment(), null).commit()
+    }
+}

app/src/main/java/com/codepath/bestsellerlistapp/BestSellerBooksRecyclerViewAdapter.kt

@@ -0,0 +1,7 @@
+package com.codepath.bestsellerlistapp
+
+import com.codepath.bestsellerlistapp.models.BestSellerBook
+
+interface OnListFragmentInteractionListener {
+    fun onItemClick(item: BestSellerBook)
+}