Updating IconCache to maintain a persistent of icons

> IconDB maintains a DB of icons keyed on ComponentName + User
> During loader, icons & labels are loaded first from the DB, and
if the entry doesn't exist, loaded using packageManager
> After the loader completes, IconDB updates any entry which might have
changed, while the launcher was dead.

Change-Id: I7a6021cb6d1ca1e66fa5a0bdd21e1543e0cf66fc

1 files changed, 19 insertions, 6 deletions

diff --git a/src/com/android/launcher3/LauncherBackupHelper.java b/src/com/android/launcher3/LauncherBackupHelper.java
index 353bf3f00..97ff32790 100644
--- a/src/com/android/launcher3/LauncherBackupHelper.java
+++ b/src/com/android/launcher3/LauncherBackupHelper.java
@@ -144,6 +144,7 @@ public class LauncherBackupHelper implements BackupHelper {
     private final HashSet<String> mExistingKeys;
     private final ArrayList<Key> mKeys;
     private final ItemTypeMatcher[] mItemTypeMatchers;
+    private final long mUserSerial;
 
     private IconCache mIconCache;
     private BackupManager mBackupManager;
@@ -161,6 +162,9 @@ public class LauncherBackupHelper implements BackupHelper {
         mKeys = new ArrayList<Key>();
         restoreSuccessful = true;
         mItemTypeMatchers = new ItemTypeMatcher[CommonAppTypeParser.SUPPORTED_TYPE_COUNT];
+
+        UserManagerCompat userManager = UserManagerCompat.getInstance(mContext);
+        mUserSerial = userManager.getSerialNumberForUser(UserHandleCompat.myUserHandle());
     }
 
     private void dataChanged() {
@@ -297,6 +301,12 @@ public class LauncherBackupHelper implements BackupHelper {
         if (!restoreSuccessful) {
             return;
         }
+        if (!initializeIconCache()) {
+            // During restore we do not need an initialized instance of IconCache. We can create
+            // a temporary icon cache here, as the process will be rebooted after restore
+            // is complete.
+            mIconCache = new IconCache(mContext);
+        }
 
         int dataSize = data.size();
         if (mBuffer.length < dataSize) {
@@ -601,7 +611,8 @@ public class LauncherBackupHelper implements BackupHelper {
             Log.w(TAG, "failed to unpack icon for " + key.name);
         }
         if (VERBOSE) Log.v(TAG, "saving restored icon as: " + key.name);
-        IconCache.preloadIcon(mContext, ComponentName.unflattenFromString(key.name), icon, res.dpi);
+        mIconCache.preloadIcon(ComponentName.unflattenFromString(key.name), icon, res.dpi,
+                "" /* label */, mUserSerial);
     }
 
     /**
@@ -693,8 +704,8 @@ public class LauncherBackupHelper implements BackupHelper {
             if (icon == null) {
                 Log.w(TAG, "failed to unpack widget icon for " + key.name);
             } else {
-                IconCache.preloadIcon(mContext, ComponentName.unflattenFromString(widget.provider),
-                        icon, widget.icon.dpi);
+                mIconCache.preloadIcon(ComponentName.unflattenFromString(widget.provider),
+                        icon, widget.icon.dpi, widget.label, mUserSerial);
             }
         }
 
@@ -1145,9 +1156,11 @@ public class LauncherBackupHelper implements BackupHelper {
 
         final LauncherAppState appState = LauncherAppState.getInstanceNoCreate();
         if (appState == null) {
-            Throwable stackTrace = new Throwable();
-            stackTrace.fillInStackTrace();
-            Log.w(TAG, "Failed to get app state during backup/restore", stackTrace);
+            if (DEBUG) {
+                Throwable stackTrace = new Throwable();
+                stackTrace.fillInStackTrace();
+                Log.w(TAG, "Failed to get app state during backup/restore", stackTrace);
+            }
             return false;
         }
         mIconCache = appState.getIconCache();