Add accessibility event when saving screenshot

Send an accessibility event with "Saving screenshot" as the
screenshot is saved, so that it can be read out through e.g.
TalkBack.

Bug: 149832748
Test: manual; turned on talkback and ensured that the text was
read out when saving the screenshot from keychord/overview.

Change-Id: Ibe237a81cec0961065bf741eb5f3bb9dc9d14712

2 files changed, 12 insertions, 1 deletions

diff --git a/packages/SystemUI/res/values/strings.xml b/packages/SystemUI/res/values/strings.xml
index 2427d36076c5..9c22e7edb743 100644
--- a/packages/SystemUI/res/values/strings.xml
+++ b/packages/SystemUI/res/values/strings.xml
@@ -218,7 +218,7 @@
 
     <!-- Notification ticker displayed when a screenshot is being saved to the Gallery. [CHAR LIMIT=30] -->
     <string name="screenshot_saving_ticker">Saving screenshot\u2026</string>
-    <!-- Notification title displayed when a screenshot is being saved to the Gallery. [CHAR LIMIT=50] -->
+    <!-- Informs the user that a screenshot is being saved. [CHAR LIMIT=50] -->
     <string name="screenshot_saving_title">Saving screenshot\u2026</string>
     <!-- Notification title displayed when a screenshot is saved to the Gallery. [CHAR LIMIT=50] -->
     <string name="screenshot_saved_title">Screenshot saved</string>
diff --git a/packages/SystemUI/src/com/android/systemui/screenshot/GlobalScreenshot.java b/packages/SystemUI/src/com/android/systemui/screenshot/GlobalScreenshot.java
index 2b4fa2a23a07..0413c304ca72 100644
--- a/packages/SystemUI/src/com/android/systemui/screenshot/GlobalScreenshot.java
+++ b/packages/SystemUI/src/com/android/systemui/screenshot/GlobalScreenshot.java
@@ -69,6 +69,7 @@ import android.view.ViewOutlineProvider;
 import android.view.ViewTreeObserver;
 import android.view.WindowInsets;
 import android.view.WindowManager;
+import android.view.accessibility.AccessibilityEvent;
 import android.view.accessibility.AccessibilityManager;
 import android.view.animation.AccelerateInterpolator;
 import android.view.animation.AnimationUtils;
@@ -184,6 +185,7 @@ public class GlobalScreenshot implements ViewTreeObserver.OnComputeInternalInset
     private final WindowManager.LayoutParams mWindowLayoutParams;
     private final Display mDisplay;
     private final DisplayMetrics mDisplayMetrics;
+    private final AccessibilityManager mAccessibilityManager;
 
     private View mScreenshotLayout;
     private ScreenshotSelectorView mScreenshotSelectorView;
@@ -242,6 +244,7 @@ public class GlobalScreenshot implements ViewTreeObserver.OnComputeInternalInset
         mScreenshotSmartActions = screenshotSmartActions;
         mNotificationsController = screenshotNotificationsController;
         mUiEventLogger = uiEventLogger;
+        mAccessibilityManager = AccessibilityManager.getInstance(mContext);
 
         reloadAssets();
         Configuration config = mContext.getResources().getConfiguration();
@@ -573,6 +576,14 @@ public class GlobalScreenshot implements ViewTreeObserver.OnComputeInternalInset
 
     private void saveScreenshot(Bitmap screenshot, Consumer<Uri> finisher, Rect screenRect,
             Insets screenInsets, boolean showFlash) {
+        if (mAccessibilityManager.isEnabled()) {
+            AccessibilityEvent event =
+                    new AccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED);
+            event.setContentDescription(
+                    mContext.getResources().getString(R.string.screenshot_saving_title));
+            mAccessibilityManager.sendAccessibilityEvent(event);
+        }
+
         if (mScreenshotLayout.isAttachedToWindow()) {
             // if we didn't already dismiss for another reason
             if (mDismissAnimation == null || !mDismissAnimation.isRunning()) {