Use TextSwitcher for animating status card text changes.

The transition animation fails occasionally and gets stuck. Have not
been able to track down exactly why or how.

Bug: 283953501
Test: Manual testing and atest SafetyCenterFunctionalTestCases
SafetyCenterActivityFunctionalTestCases
Relnote: Visual bugfix for Safety Center
Flag: EXEMPT bugfix

Change-Id: I7a3abebc36932dd52aef97230b983fae5e986c93

5 files changed, 93 insertions, 62 deletions

diff --git a/PermissionController/res/anim/text_switcher_fade_in.xml b/PermissionController/res/anim/text_switcher_fade_in.xml
new file mode 100644
index 000000000..b9e2812aa
--- /dev/null
+++ b/PermissionController/res/anim/text_switcher_fade_in.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2024 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.
+  -->
+
+<alpha xmlns:android="http://schemas.android.com/apk/res/android"
+    android:interpolator="@android:anim/linear_interpolator"
+    android:fromAlpha="0.0" android:toAlpha="1.0"
+    android:startOffset="@android:integer/config_shortAnimTime"
+    android:duration="@android:integer/config_shortAnimTime" />
\ No newline at end of file
diff --git a/PermissionController/res/anim/text_switcher_fade_out.xml b/PermissionController/res/anim/text_switcher_fade_out.xml
new file mode 100644
index 000000000..4b7274707
--- /dev/null
+++ b/PermissionController/res/anim/text_switcher_fade_out.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2024 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.
+  -->
+
+<alpha xmlns:android="http://schemas.android.com/apk/res/android"
+    android:interpolator="@android:anim/linear_interpolator"
+    android:fromAlpha="1.0" android:toAlpha="0.0"
+    android:duration="@android:integer/config_shortAnimTime" />
\ No newline at end of file
diff --git a/PermissionController/res/layout-v33/view_status_card.xml b/PermissionController/res/layout-v33/view_status_card.xml
index 4915347be..d8ca8b7ea 100644
--- a/PermissionController/res/layout-v33/view_status_card.xml
+++ b/PermissionController/res/layout-v33/view_status_card.xml
@@ -30,15 +30,34 @@
         android:id="@+id/status_title_and_summary"
         style="?attr/scStatusTitleAndSummaryContainerStyle">
 
-        <TextView
+        <TextSwitcher
             android:id="@+id/status_title"
-            android:text="@string/summary_placeholder"
-            style="@style/SafetyCenterStatusTitle" />
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:inAnimation="@anim/text_switcher_fade_in"
+            android:outAnimation="@anim/text_switcher_fade_out">
+            <TextView
+                android:text="@string/summary_placeholder"
+                style="@style/SafetyCenterStatusTitle" />
+            <TextView
+                android:text="@string/summary_placeholder"
+                style="@style/SafetyCenterStatusTitle" />
+        </TextSwitcher>
 
-        <TextView
+
+        <TextSwitcher
             android:id="@+id/status_summary"
-            android:text="@string/summary_placeholder"
-            style="@style/SafetyCenterStatusSummary" />
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:inAnimation="@anim/text_switcher_fade_in"
+            android:outAnimation="@anim/text_switcher_fade_out">
+            <TextView
+                android:text="@string/summary_placeholder"
+                style="@style/SafetyCenterStatusSummary" />
+            <TextView
+                android:text="@string/summary_placeholder"
+                style="@style/SafetyCenterStatusSummary" />
+        </TextSwitcher>
     </LinearLayout>
 
     <androidx.constraintlayout.widget.Barrier
diff --git a/PermissionController/src/com/android/permissioncontroller/safetycenter/ui/SafetyStatusPreference.java b/PermissionController/src/com/android/permissioncontroller/safetycenter/ui/SafetyStatusPreference.java
index abf159955..0bef71b3e 100644
--- a/PermissionController/src/com/android/permissioncontroller/safetycenter/ui/SafetyStatusPreference.java
+++ b/PermissionController/src/com/android/permissioncontroller/safetycenter/ui/SafetyStatusPreference.java
@@ -29,7 +29,6 @@ import android.text.TextUtils;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.widget.ImageView;
-import android.widget.TextView;
 
 import androidx.annotation.Nullable;
 import androidx.annotation.RequiresApi;
@@ -42,9 +41,6 @@ import com.android.permissioncontroller.safetycenter.ui.model.StatusUiData;
 import com.android.permissioncontroller.safetycenter.ui.view.StatusCardView;
 import com.android.settingslib.widget.GroupSectionDividerMixin;
 
-import kotlin.Pair;
-
-import java.util.List;
 import java.util.Objects;
 
 /** Preference which displays a visual representation of {@link SafetyCenterStatus}. */
@@ -54,25 +50,16 @@ public class SafetyStatusPreference extends Preference
 
     private static final String TAG = "SafetyStatusPreference";
 
+    private final SafetyStatusAnimationSequencer mSequencer = new SafetyStatusAnimationSequencer();
+
     @Nullable private StatusUiData mStatus;
     @Nullable private SafetyCenterViewModel mViewModel;
 
-    private final TextFadeAnimator mTitleTextAnimator = new TextFadeAnimator(R.id.status_title);
-
-    private final TextFadeAnimator mSummaryTextAnimator = new TextFadeAnimator(R.id.status_summary);
-
-    private final TextFadeAnimator mAllTextAnimator =
-            new TextFadeAnimator(List.of(R.id.status_title, R.id.status_summary));
-
-    private boolean mFirstBind = true;
-
     public SafetyStatusPreference(Context context, AttributeSet attrs) {
         super(context, attrs);
         setLayoutResource(R.layout.preference_safety_status);
     }
 
-    private boolean mIsTextChangeAnimationRunning;
-    private final SafetyStatusAnimationSequencer mSequencer = new SafetyStatusAnimationSequencer();
 
     @Override
     public void onBindViewHolder(PreferenceViewHolder holder) {
@@ -93,9 +80,7 @@ public class SafetyStatusPreference extends Preference
 
         updateStatusIcon(statusCardView);
 
-        updateStatusText(statusCardView.getTitleView(), statusCardView.getSummaryView());
-
-        mFirstBind = false;
+        statusCardView.showText(mStatus);
     }
 
     private void configureButtons(Context context, StatusCardView statusCardView) {
@@ -125,14 +110,6 @@ public class SafetyStatusPreference extends Preference
         statusCardView.showButtons(mStatus);
     }
 
-    private void updateStatusText(TextView title, TextView summary) {
-        if (mFirstBind) {
-            title.setText(mStatus.getTitle());
-            summary.setText(mStatus.getSummary(getContext()));
-        }
-        runTextAnimationIfNeeded(title, summary);
-    }
-
     private void updateStatusIcon(StatusCardView statusCardView) {
         int severityLevel = mStatus.getSeverityLevel();
         boolean isRefreshing = mStatus.isRefreshInProgress();
@@ -143,33 +120,6 @@ public class SafetyStatusPreference extends Preference
                 /* scanningAnimation= */ null);
     }
 
-    private void runTextAnimationIfNeeded(TextView titleView, TextView summaryView) {
-        if (mIsTextChangeAnimationRunning) {
-            return;
-        }
-        Log.v(TAG, "Starting status text animation");
-        String titleText = mStatus.getTitle().toString();
-        String summaryText = mStatus.getSummary(getContext()).toString();
-        boolean titleEquals = titleView.getText().toString().equals(titleText);
-        boolean summaryEquals = summaryView.getText().toString().equals(summaryText);
-        Runnable onFinish =
-                () -> {
-                    Log.v(TAG, "Finishing status text animation");
-                    mIsTextChangeAnimationRunning = false;
-                    runTextAnimationIfNeeded(titleView, summaryView);
-                };
-        mIsTextChangeAnimationRunning = !titleEquals || !summaryEquals;
-        if (!titleEquals && !summaryEquals) {
-            Pair<TextView, String> titleChange = new Pair<>(titleView, titleText);
-            Pair<TextView, String> summaryChange = new Pair<>(summaryView, summaryText);
-            mAllTextAnimator.animateChangeText(List.of(titleChange, summaryChange), onFinish);
-        } else if (!titleEquals) {
-            mTitleTextAnimator.animateChangeText(titleView, titleText, onFinish);
-        } else if (!summaryEquals) {
-            mSummaryTextAnimator.animateChangeText(summaryView, summaryText, onFinish);
-        }
-    }
-
     private void startScanningAnimation(StatusCardView statusCardView) {
         mSequencer.onStartScanningAnimationStart();
         ImageView statusImage = statusCardView.getStatusImageView();
diff --git a/PermissionController/src/com/android/permissioncontroller/safetycenter/ui/view/StatusCardView.kt b/PermissionController/src/com/android/permissioncontroller/safetycenter/ui/view/StatusCardView.kt
index 6a415c563..bb417104d 100644
--- a/PermissionController/src/com/android/permissioncontroller/safetycenter/ui/view/StatusCardView.kt
+++ b/PermissionController/src/com/android/permissioncontroller/safetycenter/ui/view/StatusCardView.kt
@@ -21,6 +21,7 @@ import android.os.Build
 import android.util.AttributeSet
 import android.widget.ImageView
 import android.widget.LinearLayout
+import android.widget.TextSwitcher
 import android.widget.TextView
 import androidx.annotation.RequiresApi
 import androidx.constraintlayout.widget.ConstraintLayout
@@ -35,7 +36,7 @@ constructor(
     context: Context,
     attrs: AttributeSet? = null,
     defStyleAttr: Int = 0,
-    defStyleRes: Int = 0
+    defStyleRes: Int = 0,
 ) : ConstraintLayout(context, attrs, defStyleAttr, defStyleRes) {
 
     init {
@@ -44,11 +45,29 @@ constructor(
 
     val statusImageView: ImageView by lazyView(R.id.status_image)
     val titleAndSummaryContainerView: LinearLayout by lazyView(R.id.status_title_and_summary)
-    val titleView: TextView by lazyView(R.id.status_title)
-    val summaryView: TextView by lazyView(R.id.status_summary)
+    private val titleView: TextSwitcher by lazyView(R.id.status_title)
+    private val summaryView: TextSwitcher by lazyView(R.id.status_summary)
     val reviewSettingsButton: MaterialButton by lazyView(R.id.review_settings_button)
     val rescanButton: MaterialButton by lazyView(R.id.rescan_button)
 
+    fun showText(statusUiData: StatusUiData) {
+        titleView.updateText(statusUiData.title)
+        summaryView.updateText(statusUiData.getSummary(context))
+    }
+
+    private fun TextSwitcher.updateText(newText: CharSequence) {
+        val currentText: CharSequence? = (currentView as TextView).text
+        if (currentText == newText) {
+            return
+        }
+
+        if (currentText.isNullOrBlank()) {
+            setCurrentText(newText)
+        } else {
+            setText(newText)
+        }
+    }
+
     fun showButtons(statusUiData: StatusUiData) {
         rescanButton.isEnabled = !statusUiData.isRefreshInProgress