replace PhotoView with GifDrawable

it will replace zoomable gifs with smooth gifs

app/build.gradle

@@ -37,13 +37,13 @@ android {
 }
 
 dependencies {
-    compile 'com.simplemobiletools:commons:2.32.5'
+    compile 'com.simplemobiletools:commons:2.32.6'
     compile 'com.davemorrissey.labs:subsampling-scale-image-view:3.6.0'
     compile 'com.theartofdev.edmodo:android-image-cropper:2.4.0'
     compile 'com.bignerdranch.android:recyclerview-multiselect:0.2'
     compile 'com.google.code.gson:gson:2.8.0'
-    compile 'com.github.chrisbanes:PhotoView:2.1.2'
     compile 'it.sephiroth.android.exif:library:1.0.1'
+    compile 'pl.droidsonroids.gif:android-gif-drawable:1.2.8'
     compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
 
     debugCompile 'com.squareup.leakcanary:leakcanary-android:1.5.1'

app/src/main/kotlin/com/simplemobiletools/gallery/extensions/activity.kt

@@ -130,7 +130,7 @@ fun Activity.launchCamera() {
 
 fun SimpleActivity.launchAbout() {
     startAboutActivity(R.string.app_name, LICENSE_KOTLIN or LICENSE_GLIDE or LICENSE_CROPPER or LICENSE_MULTISELECT or LICENSE_RTL
-            or LICENSE_PHOTOVIEW or LICENSE_SUBSAMPLING or LICENSE_PATTERN, BuildConfig.VERSION_NAME)
+            or LICENSE_SUBSAMPLING or LICENSE_PATTERN or LICENSE_REPRINT or LICENSE_GIF_DRAWABLE, BuildConfig.VERSION_NAME)
 }
 
 fun AppCompatActivity.showSystemUI() {

app/src/main/kotlin/com/simplemobiletools/gallery/fragments/PhotoFragment.kt

@@ -13,12 +13,10 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import com.bumptech.glide.Glide
-import com.bumptech.glide.Priority
 import com.bumptech.glide.load.DataSource
 import com.bumptech.glide.load.DecodeFormat
 import com.bumptech.glide.load.engine.DiskCacheStrategy
 import com.bumptech.glide.load.engine.GlideException
-import com.bumptech.glide.load.resource.drawable.DrawableTransitionOptions
 import com.bumptech.glide.request.RequestListener
 import com.bumptech.glide.request.RequestOptions
 import com.bumptech.glide.request.target.Target
@@ -33,6 +31,7 @@ import com.simplemobiletools.gallery.helpers.MEDIUM
 import com.simplemobiletools.gallery.models.Medium
 import it.sephiroth.android.library.exif2.ExifInterface
 import kotlinx.android.synthetic.main.pager_photo_item.view.*
+import pl.droidsonroids.gif.GifDrawable
 import java.io.File
 import java.io.FileOutputStream
 
@@ -41,6 +40,7 @@ class PhotoFragment : ViewPagerFragment() {
     private var wasInit = false
     private var storedShowExtendedDetails = false
     private var storedExtendedDetails = 0
+    private var gifDrawable: GifDrawable? = null
 
     lateinit var view: ViewGroup
     lateinit var medium: Medium
@@ -80,18 +80,8 @@ class PhotoFragment : ViewPagerFragment() {
             }
         }
 
-        view.subsampling_view.setOnClickListener({ photoClicked() })
-        view.photo_view.apply {
-            maximumScale = 8f
-            mediumScale = 3f
-            setOnOutsidePhotoTapListener {
-                photoClicked()
-            }
-
-            setOnPhotoTapListener { view, x, y ->
-                photoClicked()
-            }
-        }
+        view.subsampling_view.setOnClickListener { photoClicked() }
+        view.gif_view.setOnClickListener { photoClicked() }
         loadImage()
         checkExtendedDetails()
 
@@ -117,7 +107,24 @@ class PhotoFragment : ViewPagerFragment() {
         super.setMenuVisibility(menuVisible)
         isFragmentVisible = menuVisible
         if (wasInit) {
-            if (menuVisible) {
+            if (medium.isGif()) {
+                gifFragmentVisibilityChanged(menuVisible)
+            } else {
+                photoFragmentVisibilityChanged(menuVisible)
+            }
+        }
+    }
+
+    private fun gifFragmentVisibilityChanged(isVisible: Boolean) {
+        if (isVisible) {
+            gifDrawable?.start()
+        } else {
+            gifDrawable?.stop()
+        }
+    }
+
+    private fun photoFragmentVisibilityChanged(isVisible: Boolean) {
+        if (isVisible) {
             addZoomableView()
         } else {
             view.subsampling_view.apply {
@@ -127,7 +134,6 @@ class PhotoFragment : ViewPagerFragment() {
             }
         }
     }
-    }
 
     private fun degreesForRotation(orientation: Int) = when (orientation) {
         8 -> 270
@@ -149,16 +155,11 @@ class PhotoFragment : ViewPagerFragment() {
 
     private fun loadImage() {
         if (medium.isGif()) {
-            val options = RequestOptions()
-                    .priority(if (isFragmentVisible) Priority.IMMEDIATE else Priority.LOW)
-                    .diskCacheStrategy(DiskCacheStrategy.DATA)
+            gifDrawable = GifDrawable(medium.path)
+            if (!isFragmentVisible)
+                gifDrawable!!.stop()
 
-            Glide.with(this)
-                    .asGif()
-                    .load(medium.path)
-                    .transition(DrawableTransitionOptions.withCrossFade())
-                    .apply(options)
-                    .into(view.photo_view)
+            view.gif_view.setImageDrawable(gifDrawable)
         } else {
             loadBitmap()
         }
@@ -187,7 +188,7 @@ class PhotoFragment : ViewPagerFragment() {
                                 addZoomableView()
                             return false
                         }
-                    }).into(view.photo_view)
+                    }).into(view.gif_view)
         } else {
             val options = RequestOptions()
                     .diskCacheStrategy(DiskCacheStrategy.NONE)
@@ -198,7 +199,7 @@ class PhotoFragment : ViewPagerFragment() {
                     .load(medium.path)
                     .thumbnail(0.2f)
                     .apply(options)
-                    .into(view.photo_view)
+                    .into(view.gif_view)
         }
     }
 
@@ -286,7 +287,7 @@ class PhotoFragment : ViewPagerFragment() {
         super.onDestroyView()
         context.isKitkatPlus()
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1 && !activity.isDestroyed) {
-            Glide.with(context).clear(view.photo_view)
+            Glide.with(context).clear(view.gif_view)
         }
     }
 

app/src/main/res/layout/pager_photo_item.xml

@@ -6,8 +6,8 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
-    <com.github.chrisbanes.photoview.PhotoView
-        android:id="@+id/photo_view"
+    <pl.droidsonroids.gif.GifImageView
+        android:id="@+id/gif_view"
         android:layout_width="match_parent"
         android:layout_height="match_parent"/>