added pull to refresh example

SwipeRefreshLayoutAndroid/.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx

SwipeRefreshLayoutAndroid/app/.gitignore

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+/build

SwipeRefreshLayoutAndroid/app/build.gradle

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+apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android'
+apply plugin: 'kotlin-android-extensions'
+
+android {
+    compileSdkVersion 30
+    buildToolsVersion "30.0.1"
+
+    defaultConfig {
+        applicationId "com.example.swiperefreshlayoutandroid"
+        minSdkVersion 24
+        targetSdkVersion 30
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    implementation fileTree(dir: "libs", include: ["*.jar"])
+    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+    implementation 'androidx.core:core-ktx:1.3.1'
+    implementation 'androidx.appcompat:appcompat:1.2.0'
+    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+    testImplementation 'junit:junit:4.12'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
+    implementation "androidx.swiperefreshlayout:swiperefreshlayout:1.1.0"
+    implementation "androidx.recyclerview:recyclerview:1.1.0"
+    implementation "androidx.cardview:cardview:1.0.0"
+    implementation 'com.squareup.retrofit2:retrofit:2.1.0'
+    implementation 'com.squareup.retrofit2:converter-gson:2.1.0'
+    implementation 'com.github.bumptech.glide:glide:4.7.1'
+}

SwipeRefreshLayoutAndroid/app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

SwipeRefreshLayoutAndroid/app/src/androidTest/java/com/example/swiperefreshlayoutandroid/ExampleInstrumentedTest.kt

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+package com.example.swiperefreshlayoutandroid
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("com.example.swiperefreshlayoutandroid", appContext.packageName)
+    }
+}

SwipeRefreshLayoutAndroid/app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.swiperefreshlayoutandroid">
+
+    <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:usesCleartextTraffic="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>

SwipeRefreshLayoutAndroid/app/src/main/java/com/example/swiperefreshlayoutandroid/ApiInterface.kt

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+package com.example.swiperefreshlayoutandroid
+
+import retrofit2.Call
+import retrofit2.Retrofit
+import retrofit2.converter.gson.GsonConverterFactory
+
+import retrofit2.http.GET
+
+
+interface ApiInterface {
+
+    @GET("volley_array.json")
+    fun getMovies() : Call<List<Movie>>
+
+    companion object {
+
+        var BASE_URL = "http://velmm.com/apis/"
+
+        fun create() : ApiInterface {
+
+            val retrofit = Retrofit.Builder()
+                .addConverterFactory(GsonConverterFactory.create())
+                .baseUrl(BASE_URL)
+                .build()
+            return retrofit.create(ApiInterface::class.java)
+
+        }
+    }
+}

SwipeRefreshLayoutAndroid/app/src/main/java/com/example/swiperefreshlayoutandroid/MainActivity.kt

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+package com.example.swiperefreshlayoutandroid
+
+import android.os.Bundle
+import android.widget.Toast
+import androidx.appcompat.app.AppCompatActivity
+import androidx.swiperefreshlayout.widget.SwipeRefreshLayout.OnRefreshListener
+import kotlinx.android.synthetic.main.activity_main.*
+import retrofit2.Call
+import retrofit2.Callback
+import retrofit2.Response
+
+
+class MainActivity : AppCompatActivity() {
+
+    lateinit var recyclerAdapter: RecyclerAdapter
+    private val apiInterface = ApiInterface.create().getMovies()
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_main)
+
+        recyclerAdapter = RecyclerAdapter(this)
+        recyclerview.adapter = recyclerAdapter
+        swipeRefreshLayout.setOnRefreshListener(refreshListener)
+        fetchMovieList()
+    }
+
+
+    private fun fetchMovieList() {
+        apiInterface.clone().enqueue(object : Callback<List<Movie>> {
+            override fun onResponse(call: Call<List<Movie>>, response: Response<List<Movie>>) {
+                swipeRefreshLayout.isRefreshing = false
+                if (response.body() != null)
+                    recyclerAdapter.setMovieListItems(response.body())
+            }
+
+            override fun onFailure(call: Call<List<Movie>>, t: Throwable?) {
+                swipeRefreshLayout.isRefreshing = false
+                Toast.makeText(this@MainActivity, t.toString(), Toast.LENGTH_SHORT).show()
+            }
+        })
+    }
+
+    private val refreshListener = OnRefreshListener {
+        swipeRefreshLayout.isRefreshing = true
+        recyclerAdapter.clearData()
+        //fetchMovieList()
+    }
+
+}

SwipeRefreshLayoutAndroid/app/src/main/java/com/example/swiperefreshlayoutandroid/Movie.kt

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+package com.example.swiperefreshlayoutandroid
+
+import com.google.gson.annotations.SerializedName
+
+
+data class Movie(var title: String, var image: String)

SwipeRefreshLayoutAndroid/app/src/main/java/com/example/swiperefreshlayoutandroid/RecyclerAdapter.kt

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+package com.example.swiperefreshlayoutandroid
+
+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.recyclerview.widget.RecyclerView
+import com.bumptech.glide.Glide
+import com.bumptech.glide.request.RequestOptions
+
+class RecyclerAdapter(val context: Context) : RecyclerView.Adapter<RecyclerAdapter.MyViewHolder>() {
+
+    var movieList : List<Movie> = listOf()
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyViewHolder {
+
+        val view = LayoutInflater.from(parent.context).inflate(R.layout.recyclerview_adapter,parent,false)
+        return MyViewHolder(view)
+    }
+
+    override fun getItemCount(): Int {
+        return movieList.size
+    }
+
+    override fun onBindViewHolder(holder: MyViewHolder, position: Int) {
+
+        holder.tvMovieName.text = movieList.get(position).title
+        Glide.with(context).load(movieList.get(position).image)
+            .apply(RequestOptions().centerCrop())
+            .into(holder.image)
+    }
+
+    fun setMovieListItems(movieList: List<Movie>){
+        this.movieList = movieList;
+        notifyDataSetChanged()
+    }
+
+    fun clearData() {
+        this.movieList = listOf()
+        notifyDataSetChanged()
+    }
+
+    class MyViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
+        val tvMovieName: TextView = itemView.findViewById(R.id.title)
+        val image: ImageView = itemView.findViewById(R.id.imageView)
+    }
+}

SwipeRefreshLayoutAndroid/app/src/main/res/drawable-v24/ic_launcher_foreground.xml

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+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="85.84757"
+                android:endY="92.4963"
+                android:startX="42.9492"
+                android:startY="49.59793"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</vector>