diff options
author | Jeremy Woods <jbwoods@google.com> | 2023-12-20 19:40:53 +0000 |
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committer | Jeremy Woods <jbwoods@google.com> | 2023-12-20 19:40:53 +0000 |
commit | c2802818656fffd625ea277eeb9fd06bad7e2480 (patch) | |
tree | b55391a687488415e5304c992a5bb3b27529644a | |
parent | d1e347560bc9c269a4bc4ed398f40ab6f613d78b (diff) | |
download | accompanist-c2802818656fffd625ea277eeb9fd06bad7e2480.tar.gz |
Ensure Navigation Material properly handles back for nested nav
If there is a nested NavGraph under the current bottomSheet destination
and you do a back press, instead of the bottomSheet which is the topmost
destination being popped, the nested NavHost underneath will be popped
instead. This is caused by bottomSheet not properly intercepting back presses.
This change added a BackHandler to ensure that bottomsheets correctly
respect the system back hierarchy for back events.
Fixes: #1726
2 files changed, 70 insertions, 0 deletions
diff --git a/navigation-material/src/androidTest/java/com/google/accompanist/navigation.material/BottomSheetNavigatorTest.kt b/navigation-material/src/androidTest/java/com/google/accompanist/navigation.material/BottomSheetNavigatorTest.kt index 915d4f39..7bad7972 100644 --- a/navigation-material/src/androidTest/java/com/google/accompanist/navigation.material/BottomSheetNavigatorTest.kt +++ b/navigation-material/src/androidTest/java/com/google/accompanist/navigation.material/BottomSheetNavigatorTest.kt @@ -779,6 +779,71 @@ internal class BottomSheetNavigatorTest { .isEqualTo(firstSheetDestination) } + @Test + fun testBackPressWithNestedGraphBehind() { + lateinit var navigator: BottomSheetNavigator + lateinit var navController: NavHostController + lateinit var nestedNavController: NavHostController + lateinit var backDispatcher: OnBackPressedDispatcher + val homeDestination = "home" + val firstSheetDestination = "sheet1" + val firstNestedDestination = "nested1" + val secondNestedDestination = "nested2" + + composeTestRule.setContent { + backDispatcher = LocalOnBackPressedDispatcherOwner.current?.onBackPressedDispatcher!! + navigator = rememberBottomSheetNavigator() + navController = rememberNavController(navigator) + ModalBottomSheetLayout(navigator) { + NavHost(navController, homeDestination) { + composable(homeDestination) { + nestedNavController = rememberNavController() + NavHost(nestedNavController, "nested1") { + composable(firstNestedDestination) { } + composable(secondNestedDestination) { } + } + } + bottomSheet(firstSheetDestination) { + Text("SheetDestination") + } + } + } + } + + assertThat(navController.currentBackStackEntry?.destination?.route) + .isEqualTo(homeDestination) + + composeTestRule.runOnUiThread { + nestedNavController.navigate(secondNestedDestination) + } + composeTestRule.waitForIdle() + + assertThat(navController.currentBackStackEntry?.destination?.route) + .isEqualTo(homeDestination) + assertThat(nestedNavController.currentBackStackEntry?.destination?.route) + .isEqualTo(secondNestedDestination) + + composeTestRule.runOnUiThread { + navController.navigate(firstSheetDestination) + } + composeTestRule.waitForIdle() + + assertThat(navigator.sheetState.currentValue) + .isAnyOf(ModalBottomSheetValue.HalfExpanded, ModalBottomSheetValue.Expanded) + + composeTestRule.runOnUiThread { + backDispatcher.onBackPressed() + } + composeTestRule.waitForIdle() + + assertThat(navController.currentBackStackEntry?.destination?.route) + .isEqualTo(homeDestination) + assertThat(nestedNavController.currentBackStackEntry?.destination?.route) + .isEqualTo(secondNestedDestination) + + assertThat(navigator.sheetState.currentValue).isEqualTo(ModalBottomSheetValue.Hidden) + } + private fun BottomSheetNavigator.createFakeDestination() = BottomSheetNavigator.Destination(this) { Text("Fake Sheet Content") diff --git a/navigation-material/src/main/java/com/google/accompanist/navigation/material/BottomSheetNavigator.kt b/navigation-material/src/main/java/com/google/accompanist/navigation/material/BottomSheetNavigator.kt index 932fc07c..d514747d 100644 --- a/navigation-material/src/main/java/com/google/accompanist/navigation/material/BottomSheetNavigator.kt +++ b/navigation-material/src/main/java/com/google/accompanist/navigation/material/BottomSheetNavigator.kt @@ -17,6 +17,7 @@ package com.google.accompanist.navigation.material import android.annotation.SuppressLint +import androidx.activity.compose.BackHandler import androidx.compose.animation.core.AnimationSpec import androidx.compose.foundation.layout.ColumnScope import androidx.compose.material.ExperimentalMaterialApi @@ -212,6 +213,10 @@ class BottomSheetNavigator( LaunchedEffect(retainedEntry) { sheetState.show() } + + BackHandler { + state.popWithTransition(popUpTo = retainedEntry!!, saveState = false) + } } SheetContentHost( |