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SliceLiveData should remove observers.

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As positions of items will be changed, new sliceViews will be created.
SliceLiveData has been set to observe a certain old sliceView. When the
page is re-launched, we cannot garantee we always get the same
sliceView, which means the sliceLiveData may be still observing a sliveView that
is no longer applicable. This will lead to broken slices.
Hence, we need to remove observers first then make it observes a new sliceView.

Bug: 117922624
Test: robotests, visual
Change-Id: I59368a6ce5fa84487c9a4788b970fdc074a0c2a9
This commit is contained in:
Emily Chuang
2018-10-18 21:01:25 +08:00
parent 4ae062b7c8
commit 8b680a988d
2 changed files with 25 additions and 7 deletions
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14
src/com/android/settings/homepage/slices/SliceContextualCardRenderer.java
View File

@@ -91,14 +91,16 @@ public class SliceContextualCardRenderer implements ContextualCardRenderer,
if (sliceLiveData == null) {
sliceLiveData = SliceLiveData.fromUri(mContext, uri);
mSliceLiveDataMap.put(uri.toString(), sliceLiveData);
sliceLiveData.observe(mLifecycleOwner, slice -> {
if (slice == null) {
Log.w(TAG, "Slice is null");
}
cardHolder.sliceView.setSlice(slice);
});
}
sliceLiveData.removeObservers(mLifecycleOwner);
sliceLiveData.observe(mLifecycleOwner, slice -> {
if (slice == null) {
Log.w(TAG, "Slice is null");
}
cardHolder.sliceView.setSlice(slice);
});
// Set this listener so we can log the interaction users make on the slice
cardHolder.sliceView.setOnSliceActionListener(this);
}