Add help/error msg for ProgressViewModel

Pass Help and Error message from FingerprintManager callback to LiveData
in FingerprintEnrollProgressViewModel.

Bug: 259664912
Test: Manually test FindSensor page
Change-Id: I3a992a51d97368fc82f6a1064d0c0d1e445e276b

src/com/android/settings/biometrics2/ui/model/EnrollmentStatusMessage.java

@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.biometrics2.ui.model;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+/**
+ * Enrolling status message (help or error)
+ */
+public final class EnrollmentStatusMessage {
+
+    private final int mMsgId;
+    @NonNull private final CharSequence mStr;
+
+    public EnrollmentStatusMessage(int msgId, @Nullable CharSequence str) {
+        mMsgId = msgId;
+        mStr = str != null ? str : "";
+    }
+
+    public int getMsgId() {
+        return mMsgId;
+    }
+
+    @Override
+    public String toString() {
+        return getClass().getSimpleName() + "@" + Integer.toHexString(hashCode())
+                + "{id:" + mMsgId + ", str:" + mStr + "}";
+    }
+
+    /**
+     * Gets status string
+     */
+    @NonNull
+    public CharSequence getStr() {
+        return mStr;
+    }
+}

src/com/android/settings/biometrics2/ui/viewmodel/FingerprintEnrollProgressViewModel.java

@@ -38,6 +38,7 @@ import com.android.settings.R;
 import com.android.settings.biometrics.fingerprint.FingerprintUpdater;
 import com.android.settings.biometrics.fingerprint.MessageDisplayController;
 import com.android.settings.biometrics2.ui.model.EnrollmentProgress;
+import com.android.settings.biometrics2.ui.model.EnrollmentStatusMessage;
 
 /**
  * Progress ViewModel handles the state around biometric enrollment. It manages the state of
@@ -51,6 +52,10 @@ public class FingerprintEnrollProgressViewModel extends AndroidViewModel {
 
     private final MutableLiveData<EnrollmentProgress> mProgressLiveData = new MutableLiveData<>(
             new EnrollmentProgress(INITIAL_STEPS, INITIAL_REMAINING));
+    private final MutableLiveData<EnrollmentStatusMessage> mHelpMessageLiveData =
+            new MutableLiveData<>();
+    private final MutableLiveData<EnrollmentStatusMessage> mErrorMessageLiveData =
+            new MutableLiveData<>();
 
     private byte[] mToken = null;
     private int mUserId = UserHandle.myUserId();
@@ -75,12 +80,12 @@ public class FingerprintEnrollProgressViewModel extends AndroidViewModel {
 
         @Override
         public void onEnrollmentHelp(int helpMsgId, CharSequence helpString) {
-            // TODO add LiveData for help message during implementing b/260957933
+            mHelpMessageLiveData.postValue(new EnrollmentStatusMessage(helpMsgId, helpString));
         }
 
         @Override
         public void onEnrollmentError(int errMsgId, CharSequence errString) {
-            // TODO add LiveData for error message during implementing b/260957933
+            mErrorMessageLiveData.postValue(new EnrollmentStatusMessage(errMsgId, errString));
         }
     };
 
@@ -91,15 +96,16 @@ public class FingerprintEnrollProgressViewModel extends AndroidViewModel {
         final Resources res = application.getResources();
         mMessageDisplayController =
                 res.getBoolean(R.bool.enrollment_message_display_controller_flag)
-                ? new MessageDisplayController(
-                        application.getMainThreadHandler(),
-                        mEnrollmentCallback,
-                        SystemClock.elapsedRealtimeClock(),
-                        res.getInteger(R.integer.enrollment_help_minimum_time_display),
-                        res.getInteger(R.integer.enrollment_progress_minimum_time_display),
-                        res.getBoolean(R.bool.enrollment_progress_priority_over_help),
-                        res.getBoolean(R.bool.enrollment_prioritize_acquire_messages),
-                        res.getInteger(R.integer.enrollment_collect_time)) : null;
+                        ? new MessageDisplayController(
+                                application.getMainThreadHandler(),
+                                mEnrollmentCallback,
+                                SystemClock.elapsedRealtimeClock(),
+                                res.getInteger(R.integer.enrollment_help_minimum_time_display),
+                                res.getInteger(R.integer.enrollment_progress_minimum_time_display),
+                                res.getBoolean(R.bool.enrollment_progress_priority_over_help),
+                                res.getBoolean(R.bool.enrollment_prioritize_acquire_messages),
+                                res.getInteger(R.integer.enrollment_collect_time))
+                        : null;
     }
 
     public void setToken(byte[] token) {
@@ -121,6 +127,14 @@ public class FingerprintEnrollProgressViewModel extends AndroidViewModel {
         return mProgressLiveData;
     }
 
+    public LiveData<EnrollmentStatusMessage> getHelpMessageLiveData() {
+        return mHelpMessageLiveData;
+    }
+
+    public LiveData<EnrollmentStatusMessage> getErrorMessageLiveData() {
+        return mErrorMessageLiveData;
+    }
+
     /**
      * Starts enrollment and return latest isEnrolling() result
      */