IconCache: fix nullpointer exceptions

LauncherActivityInfo's or resolved activities can be null.

Example crash:
java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.ComponentName android.content.pm.LauncherActivityInfo.getComponentName()' on a null object reference
    at com.android.launcher3.IconCache.getCacheEntry(IconCache.java:392)
    at com.android.launcher3.Launcher.startEdit(Launcher.java:3988)
    at com.android.launcher3.popup.SystemShortcut$AppEdit.lambda$-com_android_launcher3_popup_SystemShortcut$AppEdit_4399(SystemShortcut.java:115)
    at com.android.launcher3.popup.-$Lambda$_SMHeS1Apq5nUPo60kvmkZszeNE.$m$0
    at com.android.launcher3.popup.-$Lambda$_SMHeS1Apq5nUPo60kvmkZszeNE.onClick
    at android.view.View.performClick(View.java:6320)
    at android.view.View$PerformClick.run(View.java:25087)
    at android.os.Handler.handleCallback(Handler.java:869)
    at android.os.Handler.dispatchMessage(Handler.java:101)
    at android.os.Looper.loop(Looper.java:206)
    at android.app.ActivityThread.main(ActivityThread.java:6733)
    at java.lang.reflect.Method.invoke(Method.java)
    at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:845)

Issue: SHIFTOS-SW-31
Change-Id: If5f027e3146b358036b1ac1a1e973467d4fca2c4
Signed-off-by: Alexander Martinz <amartinz@shiftphones.com>

1 files changed, 15 insertions, 4 deletions

diff --git a/src/com/android/launcher3/IconCache.java b/src/com/android/launcher3/IconCache.java
index 137265262..453e3834e 100644
--- a/src/com/android/launcher3/IconCache.java
+++ b/src/com/android/launcher3/IconCache.java
@@ -300,6 +300,10 @@ public class IconCache {
             while (c.moveToNext()) {
                 String cn = c.getString(indexComponent);
                 ComponentName component = ComponentName.unflattenFromString(cn);
+                if (component == null) {
+                    continue;
+                }
+
                 PackageInfo info = pkgInfoMap.get(component.getPackageName());
                 if (info == null) {
                     if (!ignorePackages.contains(component.getPackageName())) {
@@ -389,9 +393,12 @@ public class IconCache {
     }
 
     CacheEntry getCacheEntry(LauncherActivityInfo app) {
+        if (app == null) {
+            return null;
+        }
         final ComponentKey key = new ComponentKey(app.getComponentName(), app.getUser());
         return mCache.get(key);
-        }
+    }
 
     public void clearIconDataBase() {
         mIconDb.clearDB();
@@ -399,6 +406,10 @@ public class IconCache {
 
     public void addCustomInfoToDataBase(Drawable icon, ItemInfo info, CharSequence title) {
         LauncherActivityInfo app = mLauncherApps.resolveActivity(info.getIntent(), info.user);
+        if (app == null) {
+            return;
+        }
+
         final ComponentKey key = new ComponentKey(app.getComponentName(), app.getUser());
         CacheEntry entry = mCache.get(key);
         PackageInfo packageInfo = null;
@@ -410,7 +421,7 @@ public class IconCache {
         // We can't reuse the entry if the high-res icon is not present.
         if (entry == null || entry.isLowResIcon || entry.icon == null) {
             entry = new CacheEntry();
-            }
+        }
         entry.icon = ((BitmapDrawable) icon).getBitmap();
         entry.title = title != null ? title : app.getLabel();
         entry.contentDescription = mUserManager.getBadgedLabelForUser(entry.title, app.getUser());
@@ -418,12 +429,12 @@ public class IconCache {
 
         Bitmap lowResIcon = generateLowResIcon(entry.icon);
         ContentValues values = newContentValues(entry.icon, lowResIcon, entry.title.toString(),
-        app.getApplicationInfo().packageName);
+                app.getApplicationInfo().packageName);
         if (packageInfo != null) {
             addIconToDB(values, app.getComponentName(), packageInfo,
                     mUserManager.getSerialNumberForUser(app.getUser()));
-            }
         }
+    }
 
     /**
      * Updates {@param values} to contain versioning information and adds it to the DB.