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fix: recalculate grid span count after rotation #4894

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89fa4da
fix: recalculate grid span count after rotation
himu-gupta Jun 18, 2026
c889d0b
chore: add calens file
himu-gupta Jun 18, 2026
afe11e5
chore: update calens file
himu-gupta Jun 24, 2026
8f8534b
fix: address grid span review comments
himu-gupta Jun 24, 2026
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7 changes: 7 additions & 0 deletions changelog/unreleased/4894
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Original file line number Diff line number Diff line change
@@ -0,0 +1,7 @@
Bugfix: Recalculate grid mode after rotation

The grid mode column count has been recalculated after device rotation, keeping
file tiles in the correct layout for the new orientation.
Comment on lines +3 to +4

@joragua joragua Jun 25, 2026

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I'd re-write the description like this:

Suggested change
The grid mode column count has been recalculated after device rotation, keeping
file tiles in the correct layout for the new orientation.
The grid mode column count has been recalculated after device rotation, keeping
file layouts aligned with the new orientation.


https://github.com/owncloud/android/issues/4884
https://github.com/owncloud/android/pull/4894
13 changes: 10 additions & 3 deletions ...pp/src/main/java/com/owncloud/android/presentation/files/filelist/MainFileListFragment.kt
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@dj4oC dj4oC Jul 8, 2026

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Test coverage: 0% on the lines this PR touches (onConfigurationChanged, onViewTypeListener, the new updateRecyclerViewLayoutForCurrentViewType()). No test file exists for MainFileListFragment at all (checked src/test and src/androidTest), and the PR's "Verification" section only lists manual compileDebugKotlin/assembleDebug runs — that proves it compiles, not that the rotation fix behaves or stays fixed. This is UI-visible behavior (the bug being fixed, #4884, is itself a rotation/layout regression), so per house rules it needs Espresso/Robolectric coverage — below the 85% bar required to approve.

Proposed test (Espresso, matching this repo's existing androidTest Koin + mockk(relaxed = true) + ActivityScenario conventions used for sibling fragments):

package com.owncloud.android.presentation.files.filelist

import android.content.res.Configuration
import androidx.recyclerview.widget.RecyclerView
import androidx.recyclerview.widget.StaggeredGridLayoutManager
import androidx.test.core.app.ActivityScenario.launch
import androidx.test.core.app.ApplicationProvider
import com.owncloud.android.R
import com.owncloud.android.domain.files.model.FileListOption
import com.owncloud.android.presentation.files.ViewType
import com.owncloud.android.presentation.files.operations.FileOperationsViewModel
import com.owncloud.android.sharing.shares.ui.TestShareFileActivity
import com.owncloud.android.testutil.OC_ACCOUNT
import com.owncloud.android.testutil.OC_FOLDER
import io.mockk.mockk
import org.junit.Assert.assertEquals
import org.junit.Assert.assertTrue
import org.junit.Before
import org.junit.Test
import org.koin.androidx.viewmodel.dsl.viewModel
import org.koin.core.context.startKoin
import org.koin.core.context.stopKoin
import org.koin.dsl.module

class MainFileListFragmentRotationTest {

    private lateinit var fragment: MainFileListFragment
    private lateinit var mainFileListViewModel: MainFileListViewModel

    @Before
    fun setUp() {
        val context = ApplicationProvider.getApplicationContext<android.content.Context>()
        mainFileListViewModel = mockk(relaxed = true)
        stopKoin()
        startKoin {
            context
            allowOverride(override = true)
            modules(module {
                viewModel { mainFileListViewModel }
                viewModel { mockk<FileOperationsViewModel>(relaxed = true) }
            })
        }

        fragment = MainFileListFragment.newInstance(
            initialFolderToDisplay = OC_FOLDER,
            fileListOption = FileListOption.ALL_FILES,
            accountName = OC_ACCOUNT.name,
        )

        launch(TestShareFileActivity::class.java).onActivity { it.startFragment(fragment) }
    }

    private fun currentSpanCount(): Int =
        (fragment.view!!.findViewById<RecyclerView>(R.id.recyclerViewMainFileList)
            .layoutManager as StaggeredGridLayoutManager).spanCount

    @Test
    fun rotating_in_grid_mode_recalculates_span_count() {
        fragment.onViewTypeListener(ViewType.VIEW_TYPE_GRID)
        fragment.onConfigurationChanged(Configuration(fragment.resources.configuration).apply {
            orientation = Configuration.ORIENTATION_LANDSCAPE
        })
        assertTrue("expected grid span > 1 after rotation", currentSpanCount() > 1)
    }

    @Test
    fun rotating_in_list_mode_keeps_span_count_at_one() {
        fragment.onViewTypeListener(ViewType.VIEW_TYPE_LIST)
        fragment.onConfigurationChanged(Configuration(fragment.resources.configuration).apply {
            orientation = Configuration.ORIENTATION_LANDSCAPE
        })
        assertEquals(1, currentSpanCount())
    }

    @Test
    fun toggling_view_type_is_remembered_across_subsequent_rotation() {
        fragment.onViewTypeListener(ViewType.VIEW_TYPE_LIST)
        fragment.onViewTypeListener(ViewType.VIEW_TYPE_GRID)
        fragment.onConfigurationChanged(fragment.resources.configuration)
        assertTrue("view type toggle should persist and drive grid span on rotation", currentSpanCount() > 1)
    }
}

Security and stability passes found nothing blocking (see review summary).

Generated by Claude Code

Original file line number Diff line number Diff line change
Expand Up @@ -335,6 +335,7 @@ class MainFileListFragment : Fragment(),
override fun onConfigurationChanged(newConfig: Configuration) {
super.onConfigurationChanged(newConfig)
updateConfigDependentSizes()
updateRecyclerViewLayoutForCurrentViewType()
}

private fun updateConfigDependentSizes() {
Expand Down Expand Up @@ -998,17 +999,24 @@ class MainFileListFragment : Fragment(),
}

override fun onViewTypeListener(viewType: ViewType) {
this.viewType = viewType
binding.optionsLayout.viewTypeSelected = viewType

if (viewType == ViewType.VIEW_TYPE_LIST) {
mainFileListViewModel.setListModeAsPreferred()
layoutManager.spanCount = 1

} else {
mainFileListViewModel.setGridModeAsPreferred()
layoutManager.spanCount = ColumnQuantity(requireContext(), R.layout.grid_item).calculateNoOfColumns()
}

updateRecyclerViewLayoutForCurrentViewType()
}

private fun updateRecyclerViewLayoutForCurrentViewType() {
layoutManager.spanCount = when (viewType) {
ViewType.VIEW_TYPE_LIST -> 1
ViewType.VIEW_TYPE_GRID -> ColumnQuantity(requireContext(), R.layout.grid_item).calculateNoOfColumns()
}
fileListAdapter.notifyItemRangeChanged(0, fileListAdapter.itemCount)
Comment on lines +1016 to 1020

@dj4oC dj4oC Jul 8, 2026

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Performance (minor-moderate, non-blocking): this now runs on every onConfigurationChanged, not just rotation — FileDisplayActivity/FolderPickerActivity declare configChanges covering keyboard visibility and uiMode (dark/light) too. In VIEW_TYPE_LIST, spanCount is always 1 and never actually changes, so those triggers still force a full notifyItemRangeChanged(0, itemCount) rebind. FileListAdapter.onBindViewHolder does a synchronous ThumbnailsCacheManager.getBitmapFromDiskCache() disk read per row, so this is real (if currently small) main-thread I/O cost on every qualifying config change, not just rotation.

Suggest guarding the rebind on an actual span-count change:

Suggested change
layoutManager.spanCount = when (viewType) {
ViewType.VIEW_TYPE_LIST -> 1
ViewType.VIEW_TYPE_GRID -> ColumnQuantity(requireContext(), R.layout.grid_item).calculateNoOfColumns()
}
fileListAdapter.notifyItemRangeChanged(0, fileListAdapter.itemCount)
val newSpanCount = when (viewType) {
ViewType.VIEW_TYPE_LIST -> 1
ViewType.VIEW_TYPE_GRID -> ColumnQuantity(requireContext(), R.layout.grid_item).calculateNoOfColumns()
}
if (newSpanCount != layoutManager.spanCount) {
layoutManager.spanCount = newSpanCount
fileListAdapter.notifyItemRangeChanged(0, fileListAdapter.itemCount)
}

Generated by Claude Code

}

Expand Down Expand Up @@ -1675,4 +1683,3 @@ class MainFileListFragment : Fragment(),
}
}
}