modify exif metadata at rotating image from fullscreen mode + autosave it

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

@@ -5,10 +5,7 @@ import android.content.Intent
 import android.content.pm.ActivityInfo
 import android.content.res.Configuration
 import android.database.Cursor
-import android.graphics.Bitmap
-import android.graphics.BitmapFactory
 import android.graphics.Color
-import android.graphics.Matrix
 import android.graphics.drawable.ColorDrawable
 import android.hardware.SensorManager
 import android.media.ExifInterface
@@ -27,7 +24,6 @@ import com.simplemobiletools.gallery.R
 import com.simplemobiletools.gallery.activities.MediaActivity.Companion.mMedia
 import com.simplemobiletools.gallery.adapters.MyPagerAdapter
 import com.simplemobiletools.gallery.asynctasks.GetMediaAsynctask
-import com.simplemobiletools.gallery.dialogs.SaveAsDialog
 import com.simplemobiletools.gallery.extensions.*
 import com.simplemobiletools.gallery.fragments.PhotoFragment
 import com.simplemobiletools.gallery.fragments.ViewPagerFragment
@@ -35,7 +31,6 @@ import com.simplemobiletools.gallery.helpers.*
 import com.simplemobiletools.gallery.models.Medium
 import kotlinx.android.synthetic.main.activity_medium.*
 import java.io.File
-import java.io.OutputStream
 import java.util.*
 
 class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, ViewPagerFragment.FragmentListener {
@@ -46,7 +41,6 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
     private var mIsFullScreen = false
     private var mPos = -1
     private var mShowAll = false
-    private var mRotationDegrees = 0f
     private var mLastHandledOrientation = 0
     private var mPrevHashcode = 0
 
@@ -187,16 +181,8 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
             findItem(R.id.menu_set_as).isVisible = getCurrentMedium()!!.isImage() == true
             findItem(R.id.menu_edit).isVisible = getCurrentMedium()!!.isImage() == true
             findItem(R.id.menu_rotate).isVisible = getCurrentMedium()!!.isImage() == true
-            findItem(R.id.menu_save_as).isVisible = mRotationDegrees != 0f
             findItem(R.id.menu_hide).isVisible = !getCurrentMedium()!!.name.startsWith('.')
             findItem(R.id.menu_unhide).isVisible = getCurrentMedium()!!.name.startsWith('.')
-
-            findItem(R.id.menu_rotate).subMenu.apply {
-                clearHeader()
-                findItem(R.id.rotate_right).icon = resources.getColoredDrawable(R.drawable.ic_rotate_right, R.color.actionbar_menu_icon)
-                findItem(R.id.rotate_left).icon = resources.getColoredDrawable(R.drawable.ic_rotate_left, R.color.actionbar_menu_icon)
-                findItem(R.id.rotate_one_eighty).icon = resources.getColoredDrawable(R.drawable.ic_rotate_one_eighty, R.color.actionbar_menu_icon)
-            }
         }
 
         return true
@@ -218,11 +204,8 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
             R.id.menu_rename -> renameFile()
             R.id.menu_edit -> openFileEditor(getCurrentFile())
             R.id.menu_properties -> showProperties()
-            R.id.menu_save_as -> saveImageAs()
             R.id.show_on_map -> showOnMap()
-            R.id.rotate_right -> rotateImage(90f)
+            R.id.menu_rotate -> rotateImage()
-            R.id.rotate_left -> rotateImage(-90f)
-            R.id.rotate_one_eighty -> rotateImage(180f)
             R.id.settings -> launchSettings()
             else -> return super.onOptionsItemSelected(item)
         }
@@ -264,52 +247,23 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
         }
     }
 
-    private fun saveImageAs() {
+    private fun rotateImage() {
-        val currPath = getCurrentPath()
+        val exif = ExifInterface(getCurrentPath())
-        SaveAsDialog(this, currPath) {
+        val rotation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL)
-            Thread({
+        val newRotation = getNewRotation(rotation)
-                toast(R.string.saving)
+        exif.setAttribute(ExifInterface.TAG_ORIENTATION, newRotation)
-                val selectedFile = File(it)
+        exif.saveAttributes()
-                val tmpFile = File(selectedFile.parent, "tmp_${it.getFilenameFromPath()}")
+        File(getCurrentPath()).setLastModified(System.currentTimeMillis())
-                try {
+        (getCurrentFragment() as? PhotoFragment)?.refreshBitmap()
-                    val bitmap = BitmapFactory.decodeFile(currPath)
-                    getFileOutputStream(tmpFile) {
-                        saveFile(tmpFile, bitmap, it)
-                        if (needsStupidWritePermissions(selectedFile.absolutePath)) {
-                            deleteFile(selectedFile) {}
     }
 
-                        renameFile(tmpFile, selectedFile) {
+    private fun getNewRotation(rotation: Int): String {
-                            deleteFile(tmpFile) {}
+        return when (rotation) {
-                        }
+            ExifInterface.ORIENTATION_ROTATE_90 -> ExifInterface.ORIENTATION_ROTATE_180
-                    }
+            ExifInterface.ORIENTATION_ROTATE_180 -> ExifInterface.ORIENTATION_ROTATE_270
-                } catch (e: OutOfMemoryError) {
+            ExifInterface.ORIENTATION_ROTATE_270 -> ExifInterface.ORIENTATION_NORMAL
-                    toast(R.string.out_of_memory_error)
+            else -> ExifInterface.ORIENTATION_ROTATE_90
-                    deleteFile(tmpFile) {}
+        }.toString()
-                } catch (e: Exception) {
-                    toast(R.string.unknown_error_occurred)
-                    deleteFile(tmpFile) {}
-                }
-            }).start()
-        }
-    }
-
-    private fun saveFile(file: File, bitmap: Bitmap, out: OutputStream) {
-        val matrix = Matrix()
-        matrix.postRotate(mRotationDegrees)
-        val bmp = Bitmap.createBitmap(bitmap, 0, 0, bitmap.width, bitmap.height, matrix, true)
-        bmp.compress(file.getCompressionFormat(), 90, out)
-        out.flush()
-        toast(R.string.file_saved)
-        out.close()
-    }
-
-    private fun rotateImage(degrees: Float) {
-        mRotationDegrees = (mRotationDegrees + degrees) % 360
-        getCurrentFragment()?.let {
-            (it as? PhotoFragment)?.rotateImageViewBy(mRotationDegrees)
-        }
-        supportInvalidateOptionsMenu()
     }
 
     private fun getCurrentFragment() = (view_pager.adapter as MyPagerAdapter).getCurrentFragment(view_pager.currentItem)
@@ -536,7 +490,6 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
         }
         mPos = position
         updateActionbarTitle()
-        mRotationDegrees = 0f
         supportInvalidateOptionsMenu()
     }
 

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

@@ -28,7 +28,6 @@ import com.simplemobiletools.gallery.extensions.config
 import com.simplemobiletools.gallery.extensions.getFileSignature
 import com.simplemobiletools.gallery.extensions.getRealPathFromURI
 import com.simplemobiletools.gallery.extensions.portrait
-import com.simplemobiletools.gallery.helpers.GlideRotateTransformation
 import com.simplemobiletools.gallery.helpers.MEDIUM
 import com.simplemobiletools.gallery.models.Medium
 import it.sephiroth.android.library.exif2.ExifInterface
@@ -159,8 +158,7 @@ class PhotoFragment : ViewPagerFragment() {
         }
     }
 
-    private fun loadBitmap(degrees: Float = 0f) {
+    private fun loadBitmap() {
-        if (degrees == 0f) {
         val targetWidth = if (ViewPagerActivity.screenWidth == 0) Target.SIZE_ORIGINAL else ViewPagerActivity.screenWidth
         val targetHeight = if (ViewPagerActivity.screenHeight == 0) Target.SIZE_ORIGINAL else ViewPagerActivity.screenHeight
 
@@ -182,15 +180,6 @@ class PhotoFragment : ViewPagerFragment() {
                         return false
                     }
                 }).into(view.photo_view)
-        } else {
-            Glide.with(this)
-                    .load(medium.path)
-                    .asBitmap()
-                    .transform(GlideRotateTransformation(context, degrees))
-                    .thumbnail(0.2f)
-                    .diskCacheStrategy(DiskCacheStrategy.NONE)
-                    .into(view.photo_view)
-        }
     }
 
     private fun addZoomableView() {
@@ -249,16 +238,16 @@ class PhotoFragment : ViewPagerFragment() {
         }
     }
 
+    fun refreshBitmap() {
+        view.subsampling_view.beGone()
+        loadBitmap()
+    }
+
     override fun onDestroyView() {
         super.onDestroyView()
         Glide.clear(view.photo_view)
     }
 
-    fun rotateImageViewBy(degrees: Float) {
-        view.subsampling_view.beGone()
-        loadBitmap(degrees)
-    }
-
     override fun onConfigurationChanged(newConfig: Configuration?) {
         super.onConfigurationChanged(newConfig)
         loadImage()

app/src/main/kotlin/com/simplemobiletools/gallery/helpers/GlideRotateTransformation.kt

@@ -1,21 +0,0 @@
-package com.simplemobiletools.gallery.helpers
-
-import android.content.Context
-import android.graphics.Bitmap
-import android.graphics.Matrix
-import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool
-import com.bumptech.glide.load.resource.bitmap.BitmapTransformation
-
-class GlideRotateTransformation(context: Context, val rotateRotationAngle: Float) : BitmapTransformation(context) {
-
-    override fun transform(pool: BitmapPool, bitmap: Bitmap, outWidth: Int, outHeight: Int): Bitmap {
-        if (rotateRotationAngle % 360 == 0f)
-            return bitmap
-
-        val matrix = Matrix()
-        matrix.postRotate(rotateRotationAngle)
-        return Bitmap.createBitmap(bitmap, 0, 0, bitmap.width, bitmap.height, matrix, true)
-    }
-
-    override fun getId() = "GlideRotateTransformation $rotateRotationAngle"
-}

app/src/main/res/menu/menu_viewpager.xml

@@ -5,24 +5,6 @@
         android:id="@+id/menu_rotate"
         android:icon="@drawable/ic_rotate_right"
         android:title="@string/rotate"
-        app:showAsAction="ifRoom">
-        <menu>
-            <item
-                android:id="@+id/rotate_right"
-                android:title="@string/rotate_right"/>
-            <item
-                android:id="@+id/rotate_left"
-                android:title="@string/rotate_left"/>
-            <item
-                android:id="@+id/rotate_one_eighty"
-                android:title="@string/rotate_one_eighty"/>
-        </menu>
-    </item>
-    <item
-        android:id="@+id/menu_save_as"
-        android:icon="@drawable/ic_check"
-        android:title="@string/save_as"
-        android:visible="false"
         app:showAsAction="ifRoom"/>
     <item
         android:id="@+id/menu_delete"