updating gradle, kotlin, commons and target SDK to 30

app/build.gradle

@@ -9,13 +9,12 @@ if (keystorePropertiesFile.exists()) {
 }
 
 android {
-    compileSdkVersion 29
-    buildToolsVersion "29.0.3"
+    compileSdkVersion 30
 
     defaultConfig {
         applicationId "com.simplemobiletools.voicerecorder"
         minSdkVersion 21
-        targetSdkVersion 29
+        targetSdkVersion 30
         versionCode 6
         versionName "5.1.3"
         setProperty("archivesBaseName", "voice-recorder")
@@ -57,7 +56,9 @@ android {
 }
 
 dependencies {
-    implementation 'com.simplemobiletools:commons:5.28.15'
+    implementation 'com.simplemobiletools:commons:5.30.1'
     implementation 'org.greenrobot:eventbus:3.2.0'
     implementation 'com.github.Armen101:AudioRecordView:1.0.2'
+    implementation 'androidx.documentfile:documentfile:1.0.1'
+    implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.1.0'
 }

app/src/main/kotlin/com/simplemobiletools/voicerecorder/fragments/PlayerFragment.kt

@@ -227,7 +227,7 @@ class PlayerFragment(context: Context, attributeSet: AttributeSet) : MyViewPager
         return try {
             val retriever = MediaMetadataRetriever()
             retriever.setDataSource(context, getAudioFileContentUri(id))
-            val time = retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION)
+            val time = retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION)!!
             Math.round(time.toLong() / 1000.toDouble())
         } catch (e: Exception) {
             0L

build.gradle

@@ -1,14 +1,14 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.3.72'
+    ext.kotlin_version = '1.4.0'
     repositories {
         google()
         jcenter()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.6.3'
+        classpath 'com.android.tools.build:gradle:4.0.1'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
         // NOTE: Do not place your application dependencies here; they belong

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Sat Mar 28 17:10:51 CET 2020
+#Sat Aug 22 16:37:15 CEST 2020
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.1.1-all.zip