Merge "Refactor getAllUsers"

packages/CarSystemUI/src/com/android/systemui/statusbar/car/UserGridRecyclerView.java

@@ -34,6 +34,7 @@ import android.graphics.Bitmap;
 import android.graphics.Rect;
 import android.os.AsyncTask;
 import android.os.UserHandle;
+import android.os.UserManager;
 import android.util.AttributeSet;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -52,6 +53,8 @@ import com.android.systemui.statusbar.phone.SystemUIDialog;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
 
 /**
  * Displays a GridLayout with icons for the users in the system to allow switching between users.
@@ -61,6 +64,7 @@ public class UserGridRecyclerView extends RecyclerView {
     private UserSelectionListener mUserSelectionListener;
     private UserAdapter mAdapter;
     private CarUserManagerHelper mCarUserManagerHelper;
+    private UserManager mUserManager;
     private Context mContext;
 
     private final BroadcastReceiver mUserUpdateReceiver = new BroadcastReceiver() {
@@ -74,6 +78,7 @@ public class UserGridRecyclerView extends RecyclerView {
         super(context, attrs);
         mContext = context;
         mCarUserManagerHelper = new CarUserManagerHelper(mContext);
+        mUserManager = UserManager.get(mContext);
 
         addItemDecoration(new ItemSpacingDecoration(context.getResources().getDimensionPixelSize(
                 R.dimen.car_user_switcher_vertical_spacing_between_users)));
@@ -103,12 +108,23 @@ public class UserGridRecyclerView extends RecyclerView {
      * @return the adapter
      */
     public void buildAdapter() {
-        List<UserRecord> userRecords = createUserRecords(mCarUserManagerHelper
-                .getAllUsers());
+        List<UserRecord> userRecords = createUserRecords(getAllUsers());
         mAdapter = new UserAdapter(mContext, userRecords);
         super.setAdapter(mAdapter);
     }
 
+    private List<UserInfo> getAllUsers() {
+        Stream<UserInfo> userListStream =
+                mUserManager.getUsers(/* excludeDying= */ true).stream();
+
+        if (UserManager.isHeadlessSystemUserMode()) {
+            userListStream =
+                    userListStream.filter(userInfo -> userInfo.id != UserHandle.USER_SYSTEM);
+        }
+        userListStream = userListStream.filter(userInfo -> userInfo.supportsSwitchToByUser());
+        return userListStream.collect(Collectors.toList());
+    }
+
     private List<UserRecord> createUserRecords(List<UserInfo> userInfoList) {
         List<UserRecord> userRecords = new ArrayList<>();
 
@@ -173,7 +189,7 @@ public class UserGridRecyclerView extends RecyclerView {
 
     private void onUsersUpdate() {
         mAdapter.clearUsers();
-        mAdapter.updateUsers(createUserRecords(mCarUserManagerHelper.getAllUsers()));
+        mAdapter.updateUsers(createUserRecords(getAllUsers()));
         mAdapter.notifyDataSetChanged();
     }