Update to Kotlin. Android code updated.

Author: Soumya Kanti Kar

.idea/compiler.xml

@@ -1,11 +1,12 @@
 apply plugin: 'com.android.application'
+apply plugin: 'org.jetbrains.kotlin.android'
 
 android {
-    compileSdkVersion 30
+    compileSdk 33
     defaultConfig {
         applicationId "com.wwdablu.soumya.wzipsample"
-        minSdkVersion 22
-        targetSdkVersion 30
+        minSdk 27
+        targetSdk 27
         versionCode 1
         versionName "1.0"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
@@ -17,14 +18,16 @@ android {
         }
     }
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility JavaVersion.VERSION_1_8
+        sourceCompatibility JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_17
     }
+    namespace 'com.wwdablu.soumya.wzipsample'
 }
 
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     implementation "androidx.appcompat:appcompat:1.3.0"
+    implementation 'androidx.core:core-ktx:1.10.0'
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'com.android.support.test:runner:1.0.2'
     androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'

.idea/deploymentTargetDropDown.xml

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.wwdablu.soumya.wzipsample">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
 
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
@@ -12,7 +11,8 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
-        <activity android:name=".MainActivity">
+        <activity android:name=".MainActivity"
+            android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 

.idea/gradle.xml

@@ -23,6 +23,8 @@
 
 public class MainActivity extends AppCompatActivity implements WZipCallback {
 
+    private static final String TAG = MainActivity.class.getSimpleName();
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -74,53 +76,12 @@ private void prepare() {
         }
 
         //Perform the zip operation
-        WZip wZip = new WZip();
-        wZip.zip(fileList,
+        WZip.zip(fileList,
                 new File(Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator + "misdir" + File.separator + "test.zip"),
-                "zip",
+                "Zipper",
                 this);
     }
 
-    @Override
-    public void onStarted(String identifier) {
-        Log.d(MainActivity.class.getSimpleName(), "Started: " + identifier);
-    }
-
-    @Override
-    public void onZipCompleted(File zipFile, String identifier) {
-        Log.d(MainActivity.class.getSimpleName(), "Zip ops completed for identifier " + identifier);
-
-        File file = new File(Environment.getExternalStorageDirectory().getAbsolutePath());
-        File[] files = file.listFiles();
-        for (File f : files) {
-
-            if(f.getName().contains("test_") && f.getName().endsWith(".txt")) {
-                f.delete();
-            }
-        }
-
-        //Wait for 1500 msec to test unzip ops
-        new Handler(MainActivity.this.getMainLooper()).postDelayed(() -> {
-            WZip wZip = new WZip();
-            Log.d(MainActivity.class.getSimpleName(), "File count: " + wZip.getFilesInfoFromZip(zipFile).size());
-            wZip.unzip(zipFile,
-                    new File(Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator + "misdirunzip"),
-                    "unzip",
-                    MainActivity.this);
-        }, 1500);
-    }
-
-    @Override
-    public void onUnzipCompleted(String identifier) {
-        Log.d(MainActivity.class.getSimpleName(), "Unzip ops completed for " + identifier);
-    }
-
-    @Override
-    public void onError(Throwable throwable, String identifier) {
-        showToast(throwable.getMessage());
-        Log.e(MainActivity.class.getSimpleName(), throwable.getMessage(), throwable);
-    }
-
     private void showToast(String text) {
         runOnUiThread(() -> Toast.makeText(MainActivity.this, text, Toast.LENGTH_SHORT).show());
     }
@@ -135,6 +96,8 @@ private void createDummyFiles() {
                 File dummyFile = new File(Environment.getExternalStorageDirectory().getAbsolutePath()
                         + File.separator + "misdir" + File.separator + "test_" + fileIndex + ".txt");
 
+                String s = dummyFile.getParent();
+
                 boolean r = new File(dummyFile.getParent()).mkdirs();
                 r = dummyFile.createNewFile();
 
@@ -155,4 +118,45 @@ private void createDummyFiles() {
             fileIndex++;
         }
     }
+
+    @Override
+    public void onStart(@NonNull String worker, @NonNull Mode mode) {
+        Log.d(TAG, "onStart: " + mode.name() + " has been started for " + worker);
+    }
+
+    @Override
+    public void onZipComplete(@NonNull String worker, @NonNull File zipFile) {
+
+        Log.d(MainActivity.class.getSimpleName(), "Zip ops completed for identifier " + worker);
+        showToast("Zip ops completed for identifier " + worker);
+
+        File file = new File(Environment.getExternalStorageDirectory().getAbsolutePath());
+        File[] files = file.listFiles();
+        for (File f : files) {
+
+            if(f.getName().contains("test_") && f.getName().endsWith(".txt")) {
+                f.delete();
+            }
+        }
+
+        Log.d(MainActivity.class.getSimpleName(), "File count: " + WZip.getFilesInfoFromZip(zipFile).size());
+        WZip.unzip(zipFile,
+                new File(Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator + "misdirunzip"),
+                "Unzipper",
+                MainActivity.this);
+
+        showToast("Extracting files");
+    }
+
+    @Override
+    public void onUnzipComplete(@NonNull String worker, @NonNull File extractedFolder) {
+        Log.d(TAG, "onUnzipComplete: " + worker + " has done unzip at " + extractedFolder.getAbsolutePath());
+        showToast(worker + " has done unzip at " + extractedFolder.getAbsolutePath());
+    }
+
+    @Override
+    public void onError(@NonNull String worker, @NonNull Exception e, @NonNull Mode mode) {
+        Log.d(TAG, "onError: " + worker + " has encountered an exception " + e.getMessage() +
+                " during " + mode.name());
+    }
 }

.idea/kotlinc.xml

@@ -1,13 +1,17 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
+    ext {
+        kotlin_version = '1.9.22'
+    }
     repositories {
         google()
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.2.1'
-        
+        classpath 'com.android.tools.build:gradle:8.2.0'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
     }

.idea/migrations.xml

@@ -13,4 +13,7 @@ org.gradle.jvmargs=-Xmx1536m
 # org.gradle.parallel=true
 android.useAndroidX=true
 android.enableJetifier=true
+android.defaults.buildfeatures.buildconfig=true
+android.nonTransitiveRClass=false
+android.nonFinalResIds=false
 

.idea/misc.xml

@@ -1,6 +1,5 @@
-#Sat Jun 15 14:57:33 EDT 2019
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.2-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.7.1-all.zip