Wrong suggestions order on restore instance state#263
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View must save the suggestions list in the original order so when it's restored, the data is shown in the correct order as when we call swapSuggestions.
eduardbosch
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Jul 20, 2017
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| savedState.suggestions = mSuggestionsAdapter.getDataSet(); | ||
| if (mSuggestionsAdapter.isReversed()) { | ||
| Collections.reverse(savedState.suggestions); |
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This introduced a bug that caused that when device moves the Activity to background, the suggestions list is reversed. Then, the suggestion adapter does not repaint the suggestions, so when the activity return to foreground, if the user selects the first element, the adapter returns that the last one was clicked.
You can check this bug deactivating this option:
If the Activity is destroyed, it is restored from instance state, so everything was ok.
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Hi again 🎉
I've found another problem with suggestions order when the suggestions list has been reversed and the view is restored from instance state.
The problem
When the suggestions list is reversed and
onSaveInstanceStateis called, the suggestions list is saved reversed, not as it has been delivered to theFloatingSearchViewthroughswapSuggestions. Then, when the view is restored from instance staterestoreFromInstanceState, the suggestions are reversed, and when they are delivered again toswapSuggestionsthe list is reversed again, so we end up with the results in reversed order.The solution
If the suggestions list is reversed, then we reverse it again before saving on
onSaveInstanceState.Test
To test this, I had to change in
MainActivity:51from:showFragment(new SlidingSearchResultsExampleFragment());to:
so the fragment is not created every time the Activity is destroyed if we are recovering from a previous instance. You should activate this option also in the developer settings to check restoring from instance state:
Before the fix
After the fix