[Fix #51][Fix #32] Fix RTL layout direction

Author: tommybuonomo

viewpagerdotsindicator-sample/build.gradle

@@ -41,5 +41,5 @@ dependencies {
   }
 
     implementation project(':viewpagerdotsindicator')
-//  implementation 'com.tbuonomo.andrui:viewpagerdotsindicator:2.1.2'
+//  implementation 'com.tbuonomo.andrui:viewpagerdotsindicator:4.0'
 }

viewpagerdotsindicator/src/main/AndroidManifest.xml

@@ -1,6 +1,6 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.tbuonomo.viewpagerdotsindicator">
 
-  <application/>
+  <application android:supportsRtl="true" />
 
 </manifest>

viewpagerdotsindicator/src/main/java/com/tbuonomo/viewpagerdotsindicator/BaseDotsIndicator.kt

@@ -3,6 +3,8 @@ package com.tbuonomo.viewpagerdotsindicator
 import android.content.Context
 import android.database.DataSetObserver
 import android.graphics.Color
+import android.os.Build.VERSION
+import android.os.Build.VERSION_CODES
 import android.util.AttributeSet
 import android.util.TypedValue
 import android.view.View
@@ -303,4 +305,13 @@ abstract class BaseDotsIndicator @JvmOverloads constructor(context: Context,
   protected val ViewPager2?.isEmpty: Boolean
     get() = this != null && this.adapter != null &&
             adapter!!.itemCount == 0
+
+  override fun onLayout(changed: Boolean, left: Int, top: Int, right: Int, bottom: Int) {
+    super.onLayout(changed, left, top, right, bottom)
+    if (VERSION.SDK_INT >= VERSION_CODES.JELLY_BEAN_MR1 && layoutDirection == View.LAYOUT_DIRECTION_RTL) {
+      layoutDirection = View.LAYOUT_DIRECTION_LTR
+      rotation = 180f
+      requestLayout()
+    }
+  }
 }

viewpagerdotsindicator/src/main/java/com/tbuonomo/viewpagerdotsindicator/DotsIndicator.kt

@@ -2,8 +2,11 @@ package com.tbuonomo.viewpagerdotsindicator
 
 import android.animation.ArgbEvaluator
 import android.content.Context
+import android.os.Build.VERSION
+import android.os.Build.VERSION_CODES
 import android.util.AttributeSet
 import android.view.LayoutInflater
+import android.view.View
 import android.view.ViewGroup.LayoutParams.WRAP_CONTENT
 import android.widget.ImageView
 import android.widget.LinearLayout
@@ -66,6 +69,11 @@ class DotsIndicator @JvmOverloads constructor(context: Context, attrs: Attribute
     val dot = LayoutInflater.from(context).inflate(R.layout.dot_layout, this, false)
     val imageView = dot.findViewById<ImageView>(R.id.dot)
     val params = imageView.layoutParams as RelativeLayout.LayoutParams
+
+    if (VERSION.SDK_INT >= VERSION_CODES.JELLY_BEAN_MR1) {
+      dot.layoutDirection = View.LAYOUT_DIRECTION_LTR
+    }
+
     params.height = dotsSize.toInt()
     params.width = params.height
     params.setMargins(dotsSpacing.toInt(), 0, dotsSpacing.toInt(), 0)

viewpagerdotsindicator/src/main/java/com/tbuonomo/viewpagerdotsindicator/SpringDotsIndicator.kt

@@ -2,6 +2,8 @@ package com.tbuonomo.viewpagerdotsindicator
 
 import android.content.Context
 import android.graphics.drawable.GradientDrawable
+import android.os.Build.VERSION
+import android.os.Build.VERSION_CODES
 import android.util.AttributeSet
 import android.view.LayoutInflater
 import android.view.View
@@ -12,7 +14,6 @@ import android.widget.LinearLayout.HORIZONTAL
 import android.widget.RelativeLayout
 import androidx.dynamicanimation.animation.SpringAnimation
 import androidx.dynamicanimation.animation.SpringForce
-import androidx.viewpager.widget.ViewPager.OnPageChangeListener
 import com.tbuonomo.viewpagerdotsindicator.BaseDotsIndicator.Type.SPRING
 
 class SpringDotsIndicator @JvmOverloads constructor(context: Context, attrs: AttributeSet? = null,
@@ -112,6 +113,10 @@ class SpringDotsIndicator @JvmOverloads constructor(context: Context, attrs: Att
   private fun buildDot(stroke: Boolean): ViewGroup {
     val dot = LayoutInflater.from(context).inflate(R.layout.spring_dot_layout, this,
             false) as ViewGroup
+    if (VERSION.SDK_INT >= VERSION_CODES.JELLY_BEAN_MR1) {
+      dot.layoutDirection = View.LAYOUT_DIRECTION_LTR
+    }
+
     val dotView = dot.findViewById<ImageView>(R.id.spring_dot)
     dotView.setBackgroundResource(
             if (stroke) R.drawable.spring_dot_stroke_background else R.drawable.spring_dot_background)
@@ -145,22 +150,6 @@ class SpringDotsIndicator @JvmOverloads constructor(context: Context, attrs: Att
     setUpDotBackground(true, dots[index])
   }
 
-  fun buildOnPageChangedListener2(): OnPageChangeListener {
-    return object : OnPageChangeListener {
-      override fun onPageScrolled(position: Int, positionOffset: Float, positionOffsetPixels: Int) {
-        val globalPositionOffsetPixels = position * (dotsSize + dotsSpacing * 2) + (dotsSize + dotsSpacing * 2) *
-                positionOffset
-        val indicatorTranslationX = globalPositionOffsetPixels + dotsStrokeWidth / 2f
-        dotIndicatorSpring?.spring?.finalPosition = indicatorTranslationX
-        dotIndicatorSpring?.animateToFinalPosition(indicatorTranslationX)
-      }
-
-      override fun onPageSelected(position: Int) {}
-
-      override fun onPageScrollStateChanged(state: Int) {}
-    };
-  }
-
   override fun buildOnPageChangedListener(): OnPageChangeListenerHelper {
     return object : OnPageChangeListenerHelper() {
 

viewpagerdotsindicator/src/main/java/com/tbuonomo/viewpagerdotsindicator/WormDotsIndicator.kt

@@ -2,6 +2,8 @@ package com.tbuonomo.viewpagerdotsindicator
 
 import android.content.Context
 import android.graphics.drawable.GradientDrawable
+import android.os.Build.VERSION
+import android.os.Build.VERSION_CODES
 import android.util.AttributeSet
 import android.view.LayoutInflater
 import android.view.View
@@ -116,6 +118,9 @@ class WormDotsIndicator @JvmOverloads constructor(context: Context, attrs: Attri
   private fun buildDot(stroke: Boolean): ViewGroup {
     val dot = LayoutInflater.from(context).inflate(R.layout.worm_dot_layout, this,
             false) as ViewGroup
+    if (VERSION.SDK_INT >= VERSION_CODES.JELLY_BEAN_MR1) {
+      dot.layoutDirection = View.LAYOUT_DIRECTION_LTR
+    }
     val dotImageView = dot.findViewById<View>(R.id.worm_dot)
     dotImageView.setBackgroundResource(
             if (stroke) R.drawable.worm_dot_stroke_background else R.drawable.worm_dot_background)