Fix - Zero Count (#19)

* fix error on restore state

* minor fixes + dependency updates

* fix travis

* fix travis

.travis.yml

@@ -7,15 +7,15 @@ android:
     - tools
     - platform-tools
     - build-tools-27.0.3
-    - android-27
+    - android-28
     - extra-google-m2repository
     - extra-android-m2repository
   licenses:
     - 'android-sdk-license-.+'
     - 'google-gdk-license-.+'
 
 before_install:
-  - echo yes | sdkmanager "platforms;android-27"
+  - echo yes | sdkmanager "platforms;android-28"
 
 script:
   - ./gradlew clean build -PdisablePreDex --stacktrace --console plain

dependencies.gradle

@@ -1,30 +1,33 @@
 ext {
   // Android Version
   minSdkVersion = 14
-  compileSdkVersion = 27
-  targetSdkVersion = 27
-  gradleVersion = '3.1.1'
-  kotlinVersion = '1.2.40'
+  compileSdkVersion = 28
+  targetSdkVersion = 28
+  gradleVersion = '3.1.4'
+  kotlinVersion = '1.2.61'
 
   supportLibraryVersion = '27.1.1'
 
   // Kotlin
   kotlinStdlib = 'org.jetbrains.kotlin:kotlin-stdlib-jdk8:' + kotlinVersion
 
   def groupId = 'com.android.support'
+  animatedVectorDrawable = groupId + ':animated-vector-drawable:' + supportLibraryVersion
   appcompatV7 = groupId + ':appcompat-v7:' + supportLibraryVersion
   cardView = groupId + ':cardview-v7:' + supportLibraryVersion
   design = groupId + ':design:' + supportLibraryVersion
+  exifinterface = groupId + ':exifinterface:' + supportLibraryVersion
   recyclerviewV7 = groupId + ':recyclerview-v7:' + supportLibraryVersion
   supportAnnotations = groupId + ':support-annotations:' + supportLibraryVersion
   constraintLayout = groupId + '.constraint:constraint-layout:1.1.0'
 
+  picasso = 'com.squareup.picasso:picasso:2.71828'
 
-  picasso = 'com.squareup.picasso:picasso:2.6.0-SNAPSHOT'
-
-  supportLibs = [appcompatV7,
+  supportLibs = [animatedVectorDrawable,
+                 appcompatV7,
                  cardView,
                  design,
+                 exifinterface,
                  recyclerviewV7,
                  supportAnnotations,
                  constraintLayout]

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase = GRADLE_USER_HOME
 distributionPath = wrapper/dists
+distributionUrl  = https\://services.gradle.org/distributions/gradle-4.9-all.zip
 zipStoreBase     = GRADLE_USER_HOME
 zipStorePath     = wrapper/dists
-distributionUrl  = https\://services.gradle.org/distributions/gradle-4.6-all.zip

pageindicator/src/main/java/com/chahinem/pageindicator/DotManager.kt

@@ -9,18 +9,17 @@ internal class DotManager(
     private val targetScrollListener: TargetScrollListener? = null
 ) {
 
-  internal var dots: ByteArray
+  internal var dots: ByteArray = ByteArray(count)
   internal var selectedIndex = 0
 
   private var scrollAmount = 0
 
   init {
-    if (count <= 0) {
-      throw IllegalArgumentException("count expected to be > 0, actual: $count")
+
+    if (count > 0) {
+      dots[0] = 6
     }
 
-    dots = ByteArray(count)
-    dots[0] = 6
     if (count <= SIZE_THRESHOLD) {
       (1 until count).forEach { i -> dots[i] = 5 }
     } else {

pageindicator/src/main/java/com/chahinem/pageindicator/PageIndicator.kt

@@ -43,29 +43,26 @@ class PageIndicator @JvmOverloads constructor(
   private var scrollListener: RecyclerView.OnScrollListener? = null
   private var pageChangeListener: ViewPager.OnPageChangeListener? = null
 
-  private var _count = 0
-  var count: Int
+  var count: Int = 0
     set(value) {
-      _count = value
       dotManager = DotManager(
-          _count,
+          value,
           dotSize,
           dotSpacing,
           dotBound,
           dotSizeMap,
           this)
 
-      dotSizes = IntArray(_count)
+      dotSizes = IntArray(value)
       dotManager?.let { it.dots.forEachIndexed { index, dot -> dotSizes[index] = it.dotSizeFor(dot) } }
-      dotAnimators = Array(_count, { _ -> ValueAnimator() })
+      dotAnimators = Array(value) { ValueAnimator() }
 
-      initialPadding = when (count) {
-        in 1..4 -> (dotBound + (4 - count) * (dotSize + dotSpacing) + dotSpacing) / 2
+      initialPadding = when (value) {
+        in 0..4 -> (dotBound + (4 - value) * (dotSize + dotSpacing) + dotSpacing) / 2
         else -> 2 * (dotSize + dotSpacing)
       }
       invalidate()
     }
-    get() = _count
 
   init {
     val ta = getContext().obtainStyledAttributes(attrs, R.styleable.PageIndicator)