Stop observing a slice view when a slice is dismissed.

In order to receive updates of slices, we make sliceLiveData observes
slice views. When a slice is dismissed, it should stop observing
the view so the view can be recycled and reused.

Fixes: 120465506
Test: robotests
Change-Id: Ie4f12e9a3e6e0e7d59d3346ab17282707047bf16

src/com/android/settings/homepage/contextualcards/slices/SliceContextualCardRenderer.java

@@ -60,7 +60,7 @@ public class SliceContextualCardRenderer implements ContextualCardRenderer,
     private static final String TAG = "SliceCardRenderer";
 
     @VisibleForTesting
-    final Map<String, LiveData<Slice>> mSliceLiveDataMap;
+    final Map<Uri, LiveData<Slice>> mSliceLiveDataMap;
     @VisibleForTesting
     final Set<SliceViewHolder> mFlippedCardSet;
 
@@ -95,8 +95,6 @@ public class SliceContextualCardRenderer implements ContextualCardRenderer,
         final SliceViewHolder cardHolder = (SliceViewHolder) holder;
         final Uri uri = card.getSliceUri();
 
-        //TODO(b/116063073): The URI check should be done earlier when we are performing final
-        // filtering after having the full list.
         if (!ContentResolver.SCHEME_CONTENT.equals(uri.getScheme())) {
             Log.w(TAG, "Invalid uri, skipping slice: " + uri);
             return;
@@ -106,11 +104,11 @@ public class SliceContextualCardRenderer implements ContextualCardRenderer,
         cardHolder.sliceView.setTag(uri);
         //TODO(b/114009676): We will soon have a field to decide what slice mode we should set.
         cardHolder.sliceView.setMode(SliceView.MODE_LARGE);
-        LiveData<Slice> sliceLiveData = mSliceLiveDataMap.get(uri.toString());
+        LiveData<Slice> sliceLiveData = mSliceLiveDataMap.get(uri);
 
         if (sliceLiveData == null) {
             sliceLiveData = SliceLiveData.fromUri(mContext, uri);
-            mSliceLiveDataMap.put(uri.toString(), sliceLiveData);
+            mSliceLiveDataMap.put(uri, sliceLiveData);
         }
         mCardSet.add(card);
 
@@ -146,6 +144,7 @@ public class SliceContextualCardRenderer implements ContextualCardRenderer,
             mControllerRendererPool.getController(mContext, card.getCardType()).onDismissed(card);
             cardHolder.resetCard();
             mFlippedCardSet.remove(cardHolder);
+            mSliceLiveDataMap.get(card.getSliceUri()).removeObservers(mLifecycleOwner);
         });
     }
 

tests/robotests/src/com/android/settings/homepage/contextualcards/slices/SliceContextualCardRendererTest.java

@@ -52,7 +52,7 @@ import org.robolectric.android.controller.ActivityController;
 @RunWith(SettingsRobolectricTestRunner.class)
 public class SliceContextualCardRendererTest {
 
-    private static final String TEST_SLICE_URI = "content://test/test";
+    private static final Uri TEST_SLICE_URI = Uri.parse("content://test/test");
 
     @Mock
     private LiveData<Slice> mSliceLiveData;
@@ -91,7 +91,7 @@ public class SliceContextualCardRendererTest {
 
     @Test
     public void bindView_invalidScheme_sliceShouldBeNull() {
-        final String sliceUri = "contet://com.android.settings.slices/action/flashlight";
+        final Uri sliceUri = Uri.parse("contet://com.android.settings.slices/action/flashlight");
         RecyclerView.ViewHolder viewHolder = getSliceViewHolder();
 
         mRenderer.bindView(viewHolder, buildContextualCard(sliceUri));
@@ -191,6 +191,23 @@ public class SliceContextualCardRendererTest {
         assertThat(mRenderer.mFlippedCardSet).doesNotContain(viewHolder);
     }
 
+    @Test
+    public void viewClick_removeCard_sliceLiveDataShouldRemoveObservers() {
+        final RecyclerView.ViewHolder viewHolder = getSliceViewHolder();
+        final View card = viewHolder.itemView.findViewById(R.id.slice_view);
+        final Button btnRemove = viewHolder.itemView.findViewById(R.id.remove);
+        final ContextualCard contextualCard = buildContextualCard(TEST_SLICE_URI);
+        mRenderer.mSliceLiveDataMap.put(TEST_SLICE_URI, mSliceLiveData);
+        mRenderer.bindView(viewHolder, contextualCard);
+        doReturn(mController).when(mControllerRendererPool).getController(mActivity,
+                ContextualCard.CardType.SLICE);
+
+        card.performLongClick();
+        btnRemove.performClick();
+
+        assertThat(mRenderer.mSliceLiveDataMap.get(TEST_SLICE_URI).hasObservers()).isFalse();
+    }
+
     @Test
     public void onStop_cardIsFlipped_shouldFlipBack() {
         final RecyclerView.ViewHolder viewHolder = getSliceViewHolder();
@@ -213,11 +230,11 @@ public class SliceContextualCardRendererTest {
         return mRenderer.createViewHolder(view);
     }
 
-    private ContextualCard buildContextualCard(String sliceUri) {
+    private ContextualCard buildContextualCard(Uri sliceUri) {
         return new ContextualCard.Builder()
                 .setName("test_name")
                 .setCardType(ContextualCard.CardType.SLICE)
-                .setSliceUri(Uri.parse(sliceUri))
+                .setSliceUri(sliceUri)
                 .build();
     }
 }