Prevent launcher switching in Settings app.

User won't be able to switch to launchers that do not support
managed profiles.
Additional explanation is shown in text under the name of the
launcher.

Bug:15099904

Change-Id: I12470bf396d41ef47d463ef42835964aacda9719

1 files changed, 48 insertions, 6 deletions

diff --git a/src/com/android/settings/HomeSettings.java b/src/com/android/settings/HomeSettings.java
index 845fe1e79..817c61acc 100644
--- a/src/com/android/settings/HomeSettings.java
+++ b/src/com/android/settings/HomeSettings.java
@@ -32,18 +32,22 @@ import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
 import android.content.res.Resources;
+import android.content.pm.UserInfo;
 import android.graphics.ColorFilter;
 import android.graphics.ColorMatrix;
 import android.graphics.ColorMatrixColorFilter;
 import android.graphics.drawable.Drawable;
 import android.net.Uri;
+import android.os.Build;
 import android.os.Bundle;
 import android.os.Handler;
+import android.os.UserManager;
 import android.preference.Preference;
 import android.preference.PreferenceGroup;
 import android.text.TextUtils;
 import android.util.Log;
 import android.view.View;
+import android.view.ViewGroup;
 import android.view.View.OnClickListener;
 import android.widget.ImageView;
 import android.widget.RadioButton;
@@ -171,6 +175,7 @@ public class HomeSettings extends SettingsPreferenceFragment implements Indexabl
         mPrefs = new ArrayList<HomeAppPreference>();
         mHomeComponentSet = new ComponentName[homeActivities.size()];
         int prefIndex = 0;
+        boolean hasManagedProfile = hasManagedProfile();
         for (int i = 0; i < homeActivities.size(); i++) {
             final ResolveInfo candidate = homeActivities.get(i);
             final ActivityInfo info = candidate.activityInfo;
@@ -179,11 +184,19 @@ public class HomeSettings extends SettingsPreferenceFragment implements Indexabl
             try {
                 Drawable icon = info.loadIcon(mPm);
                 CharSequence name = info.loadLabel(mPm);
-                HomeAppPreference pref = new HomeAppPreference(context, activityName, prefIndex,
-                        icon, name, this, info);
+                HomeAppPreference pref;
+
+                if (hasManagedProfile && !launcherHasManagedProfilesFeature(candidate)) {
+                    pref = new HomeAppPreference(context, activityName, prefIndex,
+                            icon, name, this, info, false /* not enabled */,
+                            getResources().getString(R.string.home_work_profile_not_supported));
+                } else  {
+                    pref = new HomeAppPreference(context, activityName, prefIndex,
+                            icon, name, this, info, true /* enabled */, null);
+                }
+
                 mPrefs.add(pref);
                 mPrefGroup.addPreference(pref);
-                pref.setEnabled(true);
                 if (activityName.equals(currentDefaultHome)) {
                     mCurrentHome = pref;
                 }
@@ -202,6 +215,31 @@ public class HomeSettings extends SettingsPreferenceFragment implements Indexabl
         }
     }
 
+    private boolean hasManagedProfile() {
+        Context context = getActivity();
+        UserManager userManager = (UserManager) getSystemService(Context.USER_SERVICE);
+        List<UserInfo> profiles = userManager.getProfiles(context.getUserId());
+        for (UserInfo userInfo : profiles) {
+            if (userInfo.isManagedProfile()) return true;
+        }
+        return false;
+    }
+
+    private boolean launcherHasManagedProfilesFeature(ResolveInfo resolveInfo) {
+        try {
+            ApplicationInfo appInfo = getPackageManager().getApplicationInfo(
+                    resolveInfo.activityInfo.packageName, 0 /* default flags */);
+            return versionNumberAtLeastL(appInfo.targetSdkVersion);
+        } catch (PackageManager.NameNotFoundException e) {
+            return false;
+        }
+    }
+
+    private boolean versionNumberAtLeastL(int versionNumber) {
+        // TODO: remove "|| true" once the build code for L is fixed.
+        return versionNumber >= Build.VERSION_CODES.L || true;
+    }
+
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -245,12 +283,14 @@ public class HomeSettings extends SettingsPreferenceFragment implements Indexabl
         String uninstallTarget;
 
         public HomeAppPreference(Context context, ComponentName activity,
-                int i, Drawable icon, CharSequence title,
-                HomeSettings parent, ActivityInfo info) {
+                int i, Drawable icon, CharSequence title, HomeSettings parent, ActivityInfo info,
+                boolean enabled, CharSequence summary) {
             super(context);
             setLayoutResource(R.layout.preference_home_app);
             setIcon(icon);
             setTitle(title);
+            setEnabled(enabled);
+            setSummary(summary);
             activityName = activity;
             fragment = parent;
             index = i;
@@ -305,13 +345,15 @@ public class HomeSettings extends SettingsPreferenceFragment implements Indexabl
                 icon.setEnabled(false);
                 icon.setColorFilter(grayscaleFilter);
             } else {
+                icon.setEnabled(true);
                 icon.setOnClickListener(mDeleteClickListener);
                 icon.setTag(indexObj);
             }
 
             View v = view.findViewById(R.id.home_app_pref);
-            v.setOnClickListener(mHomeClickListener);
             v.setTag(indexObj);
+
+            v.setOnClickListener(mHomeClickListener);
         }
 
         void setChecked(boolean state) {