Badge ChooserActivity choices with their app icon for disambig

When two or more activities with the same user-visible label are
shown, we have traditionally shown the app name or package name if the
app names also match. This was to help the user tell the difference
between multiple apps publishing similar activities and avoid
unintentionally starting the wrong one. However, in the case of
explicit choosers (e.g. ACTION_SEND sharing) a few common collisions
occur in practice and falling all the way back to package name isn't
very helpful.

Instead, we now assume that the app icon, which the user has seen
before at install time, is unique enough on its own to disambiguate
these cases and avoid user confusion. We no longer show the app name
or package name as secondary text in the chooser.

In cases where an activity has a different icon from its containing
app, we now badge the activity icon with the app icon so that the user
knows which app a potentially ambiguous choice belongs to.

Bug 24113937

Change-Id: Ie54fbf77bfcc86e50768f93be2be0e53cf2ce7b5

2 files changed, 26 insertions, 7 deletions

diff --git a/core/java/com/android/internal/app/ChooserActivity.java b/core/java/com/android/internal/app/ChooserActivity.java
index 80f9b0f..3219dcb 100644
--- a/core/java/com/android/internal/app/ChooserActivity.java
+++ b/core/java/com/android/internal/app/ChooserActivity.java
@@ -647,7 +647,8 @@ public class ChooserActivity extends ResolverActivity {
 
         @Override
         public CharSequence getExtendedInfo() {
-            return mSourceInfo != null ? mSourceInfo.getExtendedInfo() : null;
+            // ChooserTargets have badge icons, so we won't show the extended info to disambiguate.
+            return null;
         }
 
         @Override
@@ -740,9 +741,8 @@ public class ChooserActivity extends ResolverActivity {
 
         @Override
         public boolean showsExtendedInfo(TargetInfo info) {
-            // Reserve space to show extended info if any one of the items in the adapter has
-            // extended info. This keeps grid item sizes uniform.
-            return hasExtendedInfo();
+            // We have badges so we don't need this text shown.
+            return false;
         }
 
         @Override
diff --git a/core/java/com/android/internal/app/ResolverActivity.java b/core/java/com/android/internal/app/ResolverActivity.java
index 9272193..ef9d1ce 100644
--- a/core/java/com/android/internal/app/ResolverActivity.java
+++ b/core/java/com/android/internal/app/ResolverActivity.java
@@ -896,6 +896,7 @@ public class ResolverActivity extends Activity {
         private final ResolveInfo mResolveInfo;
         private final CharSequence mDisplayLabel;
         private Drawable mDisplayIcon;
+        private Drawable mBadge;
         private final CharSequence mExtendedInfo;
         private final Intent mResolvedIntent;
         private final List<Intent> mSourceIntents = new ArrayList<>();
@@ -940,7 +941,25 @@ public class ResolverActivity extends Activity {
         }
 
         public Drawable getBadgeIcon() {
-            return null;
+            // We only expose a badge if we have extended info.
+            // The badge is a higher-priority disambiguation signal
+            // but we don't need one if we wouldn't show extended info at all.
+            if (TextUtils.isEmpty(getExtendedInfo())) {
+                return null;
+            }
+
+            if (mBadge == null && mResolveInfo != null && mResolveInfo.activityInfo != null
+                    && mResolveInfo.activityInfo.applicationInfo != null) {
+                if (mResolveInfo.activityInfo.icon == 0 || mResolveInfo.activityInfo.icon
+                        == mResolveInfo.activityInfo.applicationInfo.icon) {
+                    // Badging an icon with exactly the same icon is silly.
+                    // If the activityInfo icon resid is 0 it will fall back
+                    // to the application's icon, making it a match.
+                    return null;
+                }
+                mBadge = mResolveInfo.activityInfo.applicationInfo.loadIcon(mPm);
+            }
+            return mBadge;
         }
 
         @Override
@@ -1378,8 +1397,8 @@ public class ResolverActivity extends Activity {
             } else {
                 mHasExtendedInfo = true;
                 boolean usePkg = false;
-                CharSequence startApp = ro.getResolveInfoAt(0).activityInfo.applicationInfo
-                        .loadLabel(mPm);
+                final ApplicationInfo ai = ro.getResolveInfoAt(0).activityInfo.applicationInfo;
+                final CharSequence startApp = ai.loadLabel(mPm);
                 if (startApp == null) {
                     usePkg = true;
                 }