Evict thumbnail caches and delay dismissing spinner on refresh finish. (eba5bb90) · Commits · e / os / android_packages_apps_DocumentsUI

src/com/android/documentsui/ThumbnailCache.java

+28 −2

Original line number	Diff line number	Diff line
		@@ -111,6 +111,13 @@ public class ThumbnailCache {
		return Result.obtainMiss();
		}

		/**
		* Puts a thumbnail for the given uri and size in to the cache.
		* @param uri the uri of the thumbnail
		* @param size the size of the thumbnail
		* @param thumbnail the thumbnail to put in cache
		* @param lastModified last modified value of the thumbnail to track its validity
		*/
		public void putThumbnail(Uri uri, Point size, Bitmap thumbnail, long lastModified) {
		Pair<Uri, Point> cacheKey = Pair.create(uri, size);

		@@ -130,13 +137,32 @@ public class ThumbnailCache {
		}
		}

		/**
		* Removes all thumbnail cache associated to the given uri.
		* @param uri the uri which thumbnail cache to remove
		*/
		public void removeUri(Uri uri) {
		TreeMap<Point, Pair<Uri, Point>> sizeMap;
		synchronized (mSizeIndex) {
		sizeMap = mSizeIndex.get(uri);
		}

		if (sizeMap != null) {
		// Create an array to hold all values to avoid ConcurrentModificationException because
		// removeKey() will be called by LruCache but we can't modify the map while we're
		// iterating over the collection of values.
		for (Pair<Uri, Point> index : sizeMap.values().toArray(new Pair[0])) {
		mCache.remove(index);
		}
		}
		}

		private void removeKey(Uri uri, Point size) {
		TreeMap<Point, Pair<Uri, Point>> sizeMap;
		synchronized (mSizeIndex) {
		sizeMap = mSizeIndex.get(uri);
		}

		// LruCache tells us to remove a key, which should exist, so sizeMap can't be null.
		assert(sizeMap != null);
		synchronized (sizeMap) {
		sizeMap.remove(size);

src/com/android/documentsui/dirlist/DirectoryFragment.java

+21 −1

Original line number	Diff line number	Diff line
		@@ -42,6 +42,7 @@ import android.graphics.drawable.Drawable;
		import android.net.Uri;
		import android.os.AsyncTask;
		import android.os.Bundle;
		import android.os.Handler;
		import android.os.Parcelable;
		import android.provider.DocumentsContract;
		import android.provider.DocumentsContract.Document;
		@@ -92,6 +93,7 @@ import com.android.documentsui.Shared;
		import com.android.documentsui.Snackbars;
		import com.android.documentsui.State;
		import com.android.documentsui.State.ViewMode;
		import com.android.documentsui.ThumbnailCache;
		import com.android.documentsui.clipping.DocumentClipper;
		import com.android.documentsui.clipping.UrisSupplier;
		import com.android.documentsui.dirlist.MultiSelectManager.Selection;
		@@ -140,6 +142,9 @@ public class DirectoryFragment extends Fragment
		private static final String TAG = "DirectoryFragment";
		private static final int LOADER_ID = 42;

		private static final int CACHE_EVICT_LIMIT = 100;
		private static final int REFRESH_SPINNER_DISMISS_DELAY = 500;

		private Model mModel;
		private MultiSelectManager mSelectionMgr;
		private Model.UpdateListener mModelUpdateListener = new ModelUpdateListener();
		@@ -1610,6 +1615,17 @@ public class DirectoryFragment extends Fragment

		@Override
		public void onRefresh() {
		// Remove thumbnail cache. We do this not because we're worried about stale thumbnails as it
		// should be covered by last modified value we store in thumbnail cache, but rather to give
		// the user a greater sense that contents are being reloaded.
		ThumbnailCache cache = DocumentsApplication.getThumbnailCache(getContext());
		String[] ids = mModel.getModelIds();
		int numOfEvicts = Math.min(ids.length, CACHE_EVICT_LIMIT);
		for (int i = 0; i < numOfEvicts; ++i) {
		cache.removeUri(mModel.getItemUri(ids[i]));
		}

		// Trigger loading
		getLoaderManager().restartLoader(LOADER_ID, null, this);
		}

		@@ -1679,7 +1695,11 @@ public class DirectoryFragment extends Fragment

		mTuner.onModelLoaded(mModel, mType, mSearchMode);

		mRefreshLayout.setRefreshing(false);
		if (mRefreshLayout.isRefreshing()) {
		new Handler().postDelayed(
		() -> mRefreshLayout.setRefreshing(false),
		REFRESH_SPINNER_DISMISS_DELAY);
		}
		}

		@Override

tests/src/com/android/documentsui/ThumbnailCacheTest.java

+12 −0

Original line number	Diff line number	Diff line
		@@ -176,6 +176,18 @@ public class ThumbnailCacheTest {
		assertSame(SMALL_BITMAP, result.getThumbnail());
		}

		@Test
		public void testRemoveUri() {
		mCache.putThumbnail(URI_0, MID_SIZE, MIDSIZE_BITMAP, LAST_MODIFIED);
		mCache.putThumbnail(URI_0, SMALL_SIZE, SMALL_BITMAP, LAST_MODIFIED);
		mCache.putThumbnail(URI_1, MID_SIZE, MIDSIZE_BITMAP, LAST_MODIFIED);

		mCache.removeUri(URI_0);

		assertMiss(mCache.getThumbnail(URI_0, MID_SIZE));
		assertHitExact(mCache.getThumbnail(URI_1, MID_SIZE));
		}

		private static void assertMiss(Result result) {
		assertEquals(Result.CACHE_MISS, result.getStatus());
		assertFalse(result.isExactHit());