creating a PanoramaActivity for handling panoramas

app/build.gradle

@@ -55,6 +55,7 @@ dependencies {
     implementation 'com.github.chrisbanes:PhotoView:2.1.3'
     implementation 'com.android.support.constraint:constraint-layout:1.1.2'
     implementation 'com.google.android.exoplayer:exoplayer-core:2.8.2'
+    implementation 'com.google.vr:sdk-panowidget:1.150.0'
     implementation 'org.apache.sanselan:sanselan:0.97-incubator'
 
     kapt "android.arch.persistence.room:compiler:1.1.1"

app/src/main/AndroidManifest.xml

@@ -1,12 +1,16 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest
     xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
     package="com.simplemobiletools.gallery"
     android:installLocation="auto">
 
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
     <uses-permission android:name="android.permission.SET_WALLPAPER"/>
 
+    <uses-sdk
+        tools:overrideLibrary="com.google.vr.widgets.common, com.google.vr.sdk.widgets.pano"/>
+
     <application
         android:name=".App"
         android:allowBackup="true"
@@ -112,6 +116,11 @@
             android:name=".activities.PhotoVideoActivity"
             android:configChanges="orientation|keyboardHidden|screenSize"/>
 
+        <activity
+            android:name=".activities.PanoramaActivity"
+            android:theme="@style/FullScreenTheme"
+            android:configChanges="orientation|keyboardHidden|screenSize"/>
+
         <activity
             android:name=".activities.IncludedFoldersActivity"
             android:label="@string/include_folders"

app/src/main/kotlin/com/simplemobiletools/gallery/activities/PanoramaActivity.kt

@@ -0,0 +1,112 @@
+package com.simplemobiletools.gallery.activities
+
+import android.graphics.BitmapFactory
+import android.os.Bundle
+import android.view.View
+import android.view.Window
+import android.widget.RelativeLayout
+import com.google.vr.sdk.widgets.pano.VrPanoramaView
+import com.simplemobiletools.commons.extensions.beVisible
+import com.simplemobiletools.commons.extensions.toast
+import com.simplemobiletools.commons.helpers.PERMISSION_WRITE_STORAGE
+import com.simplemobiletools.gallery.R
+import com.simplemobiletools.gallery.extensions.hideSystemUI
+import com.simplemobiletools.gallery.extensions.navigationBarHeight
+import com.simplemobiletools.gallery.extensions.showSystemUI
+import com.simplemobiletools.gallery.helpers.PATH
+import kotlinx.android.synthetic.main.activity_panorama.*
+
+open class PanoramaActivity : SimpleActivity() {
+    private var isFullScreen = true
+
+    public override fun onCreate(savedInstanceState: Bundle?) {
+        useDynamicTheme = false
+        requestWindowFeature(Window.FEATURE_NO_TITLE)
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_panorama)
+        supportActionBar?.hide()
+        window.decorView.systemUiVisibility = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION or View.SYSTEM_UI_FLAG_FULLSCREEN
+        (cardboard.layoutParams as RelativeLayout.LayoutParams).bottomMargin = navigationBarHeight
+        (explore.layoutParams as RelativeLayout.LayoutParams).bottomMargin = navigationBarHeight
+
+        handlePermission(PERMISSION_WRITE_STORAGE) {
+            if (it) {
+                checkIntent()
+            } else {
+                toast(R.string.no_storage_permissions)
+                finish()
+            }
+        }
+    }
+
+    override fun onResume() {
+        super.onResume()
+        panorama_view.resumeRendering()
+    }
+
+    override fun onPause() {
+        super.onPause()
+        panorama_view.pauseRendering()
+    }
+
+    override fun onDestroy() {
+        super.onDestroy()
+        panorama_view.shutdown()
+    }
+
+    private fun checkIntent() {
+        val path = intent.getStringExtra(PATH)
+        intent.removeExtra(PATH)
+
+        try {
+            val options = VrPanoramaView.Options()
+            options.inputType = VrPanoramaView.Options.TYPE_MONO
+            Thread {
+                val bitmap = BitmapFactory.decodeFile(path)
+                runOnUiThread {
+                    panorama_view.apply {
+                        beVisible()
+                        loadImageFromBitmap(bitmap, options)
+                        setFlingingEnabled(true)
+                        setPureTouchTracking(true)
+
+                        // add custom buttons so we can position them and toggle visibility as desired
+                        setFullscreenButtonEnabled(false)
+                        setInfoButtonEnabled(false)
+                        setTransitionViewEnabled(false)
+                        setStereoModeButtonEnabled(false)
+
+                        setOnClickListener {
+                            handleClick()
+                        }
+                    }
+                }
+            }.start()
+        } catch (e: Exception) {
+
+        }
+
+        window.decorView.setOnSystemUiVisibilityChangeListener { visibility ->
+            isFullScreen = visibility and View.SYSTEM_UI_FLAG_FULLSCREEN != 0
+            toggleButtonVisibility()
+        }
+    }
+
+    private fun toggleButtonVisibility() {
+        cardboard.animate().alpha(if (isFullScreen) 0f else 1f)
+        cardboard.isClickable = !isFullScreen
+
+        explore.animate().alpha(if (isFullScreen) 0f else 1f)
+        explore.isClickable = !isFullScreen
+    }
+
+    private fun handleClick() {
+        isFullScreen = !isFullScreen
+        toggleButtonVisibility()
+        if (isFullScreen) {
+            hideSystemUI(false)
+        } else {
+            showSystemUI(false)
+        }
+    }
+}

app/src/main/kotlin/com/simplemobiletools/gallery/activities/PhotoVideoActivity.kt

@@ -85,7 +85,7 @@ open class PhotoVideoActivity : SimpleActivity(), ViewPagerFragment.FragmentList
             }
         }
 
-        showSystemUI()
+        showSystemUI(true)
         val bundle = Bundle()
         val file = File(mUri.toString())
         val type = when {
@@ -201,9 +201,9 @@ open class PhotoVideoActivity : SimpleActivity(), ViewPagerFragment.FragmentList
     override fun fragmentClicked() {
         mIsFullScreen = !mIsFullScreen
         if (mIsFullScreen) {
-            hideSystemUI()
+            hideSystemUI(true)
         } else {
-            showSystemUI()
+            showSystemUI(true)
         }
 
         if (!bottom_actions.isGone()) {

app/src/main/kotlin/com/simplemobiletools/gallery/activities/ViewPagerActivity.kt

@@ -207,7 +207,7 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
             config.isThirdPartyIntent = true
         }
 
-        showSystemUI()
+        showSystemUI(true)
 
         val isShowingFavorites = intent.getBooleanExtra(SHOW_FAVORITES, false)
         val isShowingRecycleBin = intent.getBooleanExtra(SHOW_RECYCLE_BIN, false)
@@ -379,7 +379,7 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
         if (getMediaForSlideshow()) {
             view_pager.onGlobalLayout {
                 if (!isActivityDestroyed()) {
-                    hideSystemUI()
+                    hideSystemUI(true)
                     mSlideshowInterval = config.slideshowInterval
                     mSlideshowMoveBackwards = config.slideshowMoveBackwards
                     mIsSlideshowActive = true
@@ -457,7 +457,7 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
     private fun stopSlideshow() {
         if (mIsSlideshowActive) {
             mIsSlideshowActive = false
-            showSystemUI()
+            showSystemUI(true)
             mSlideshowHandler.removeCallbacksAndMessages(null)
             window.clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
         }
@@ -1072,10 +1072,10 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
 
     private fun checkSystemUI() {
         if (mIsFullScreen) {
-            hideSystemUI()
+            hideSystemUI(true)
         } else {
             stopSlideshow()
-            showSystemUI()
+            showSystemUI(true)
         }
     }
 

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

@@ -78,15 +78,21 @@ fun SimpleActivity.launchAbout() {
             or LICENSE_SUBSAMPLING or LICENSE_PATTERN or LICENSE_REPRINT or LICENSE_GIF_DRAWABLE or LICENSE_PHOTOVIEW or LICENSE_EXOPLAYER, BuildConfig.VERSION_NAME, faqItems)
 }
 
-fun AppCompatActivity.showSystemUI() {
-    supportActionBar?.show()
+fun AppCompatActivity.showSystemUI(toggleActionBarVisibility: Boolean) {
+    if (toggleActionBarVisibility) {
+        supportActionBar?.show()
+    }
+
     window.decorView.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_STABLE or
             View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION or
             View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
 }
 
-fun AppCompatActivity.hideSystemUI() {
-    supportActionBar?.hide()
+fun AppCompatActivity.hideSystemUI(toggleActionBarVisibility: Boolean) {
+    if (toggleActionBarVisibility) {
+        supportActionBar?.hide()
+    }
+
     window.decorView.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_STABLE or
             View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION or
             View.SYSTEM_UI_FLAG_HIDE_NAVIGATION or

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

@@ -1,5 +1,6 @@
 package com.simplemobiletools.gallery.fragments
 
+import android.content.Intent
 import android.content.res.Configuration
 import android.graphics.Bitmap
 import android.graphics.BitmapFactory
@@ -26,12 +27,15 @@ import com.davemorrissey.labs.subscaleview.ImageSource
 import com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView
 import com.simplemobiletools.commons.extensions.*
 import com.simplemobiletools.commons.helpers.OTG_PATH
+import com.simplemobiletools.commons.helpers.isLollipopPlus
 import com.simplemobiletools.gallery.R
+import com.simplemobiletools.gallery.activities.PanoramaActivity
 import com.simplemobiletools.gallery.activities.PhotoActivity
 import com.simplemobiletools.gallery.activities.ViewPagerActivity
 import com.simplemobiletools.gallery.extensions.*
 import com.simplemobiletools.gallery.helpers.GlideRotateTransformation
 import com.simplemobiletools.gallery.helpers.MEDIUM
+import com.simplemobiletools.gallery.helpers.PATH
 import com.simplemobiletools.gallery.helpers.ROTATE_BY_ASPECT_RATIO
 import com.simplemobiletools.gallery.models.Medium
 import it.sephiroth.android.library.exif2.ExifInterface
@@ -65,6 +69,7 @@ class PhotoFragment : ViewPagerFragment() {
             photo_view.setOnClickListener { photoClicked() }
             instant_prev_item.setOnClickListener { listener?.goToPrevItem() }
             instant_next_item.setOnClickListener { listener?.goToNextItem() }
+            panorama_outline.setOnClickListener { openPanorama() }
 
             instant_prev_item.parentView = container
             instant_next_item.parentView = container
@@ -290,6 +295,13 @@ class PhotoFragment : ViewPagerFragment() {
         }
     }
 
+    private fun openPanorama() {
+        Intent(context, PanoramaActivity::class.java).apply {
+            putExtra(PATH, medium.path)
+            startActivity(this)
+        }
+    }
+
     private fun addZoomableView() {
         if (!context!!.config.replaceZoomableImages && medium.isImage() && isFragmentVisible && view.subsampling_view.isGone()) {
             ViewPagerActivity.wasDecodedByGlide = false
@@ -342,7 +354,7 @@ class PhotoFragment : ViewPagerFragment() {
             false
         }
 
-        view.panorama_outline.beVisibleIf(isPanorama)
+        view.panorama_outline.beVisibleIf(isPanorama && isLollipopPlus())
     }
 
     private fun getImageOrientation(): Int {

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

@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/panorama_holder"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="#FF000000">
+
+    <com.google.vr.sdk.widgets.pano.VrPanoramaView
+        android:id="@+id/panorama_view"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:visibility="gone"/>
+
+    <ImageView
+        android:id="@+id/cardboard"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignParentBottom="true"
+        android:layout_alignParentRight="true"
+        android:padding="@dimen/activity_margin"
+        android:src="@drawable/ic_cardboard"/>
+
+    <ImageView
+        android:id="@+id/explore"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignParentBottom="true"
+        android:layout_alignParentLeft="true"
+        android:padding="@dimen/activity_margin"
+        android:src="@drawable/ic_explore"/>
+
+</RelativeLayout>

app/src/main/res/values-v21/styles.xml

@@ -0,0 +1,7 @@
+<resources>
+
+    <style name="FullScreenTheme" parent="AppTheme.Base">
+        <item name="android:windowTranslucentNavigation">true</item>
+    </style>
+
+</resources>

app/src/main/res/values/styles.xml

@@ -2,4 +2,9 @@
 
     <style name="AppTheme" parent="AppTheme.Base"/>
 
+    <style name="FullScreenTheme.Base" parent="AppTheme">
+        <item name="android:windowContentOverlay">@null</item>
+    </style>
+
+    <style name="FullScreenTheme" parent="FullScreenTheme.Base"/>
 </resources>