commit 017c8d52d5f64a805a44750796324b0300b6aaa5
author Andy Wickham <awickham@google.com> Tue Feb 18 23:58:57 2020 +0000
committer Andy Wickham <awickham@google.com> Wed Feb 19 00:27:40 2020 +0000
tree ac9256ee557f79e776fed828d3e752bc3a9aa125
parent 2b7e8e38f5fbf20eee2625090b6b02fdf2d1dcfc

Disables Back gesture while sandbox is running.

We'll want to detect this gesture ourselves to distinguish
between left and right edge and update the UI accordingly.

Note: This exclusion only works if the sandbox is launched
into the same task as Launcher (i.e. from Launcher itself).
I haven't found a way to get this to happen over adb.

Test: Launched BackGestureTutorialActivity from Launcher
and verified Back gesture animations did not play and the
onBackPressed callback was not called. Verified these did
still work in other apps.

Bug: 148542211
Change-Id: Iebc3428738edbf8ebfcff157f5952b787eb46bac

quickstep/src/com/android/quickstep/interaction/BackGestureTutorialActivity.java

diff --git a/quickstep/src/com/android/quickstep/interaction/BackGestureTutorialActivity.java b/quickstep/src/com/android/quickstep/interaction/BackGestureTutorialActivity.java
index 295ab48..d2a0951 100644
--- a/quickstep/src/com/android/quickstep/interaction/BackGestureTutorialActivity.java
+++ b/quickstep/src/com/android/quickstep/interaction/BackGestureTutorialActivity.java
@@ -16,7 +16,10 @@
 package com.android.quickstep.interaction;
 
 import android.graphics.Color;
+import android.graphics.Rect;
 import android.os.Bundle;
+import android.util.DisplayMetrics;
+import android.view.Display;
 import android.view.View;
 import android.view.Window;
 
@@ -26,6 +29,7 @@
 import com.android.quickstep.interaction.BackGestureTutorialFragment.TutorialStep;
 import com.android.quickstep.interaction.BackGestureTutorialFragment.TutorialType;
 
+import java.util.List;
 import java.util.Optional;
 
 /** Shows the Back gesture interactive tutorial in full screen mode. */
@@ -47,6 +51,12 @@
     }
 
     @Override
+    public void onAttachedToWindow() {
+        super.onAttachedToWindow();
+        disableSystemGestures();
+    }
+
+    @Override
     public void onWindowFocusChanged(boolean hasFocus) {
         super.onWindowFocusChanged(hasFocus);
         if (hasFocus) {
@@ -70,4 +80,14 @@
                         | View.SYSTEM_UI_FLAG_FULLSCREEN);
         getWindow().setNavigationBarColor(Color.TRANSPARENT);
     }
+
+    private void disableSystemGestures() {
+        Display display = getDisplay();
+        if (display != null) {
+            DisplayMetrics metrics = new DisplayMetrics();
+            display.getMetrics(metrics);
+            getWindow().setSystemGestureExclusionRects(
+                    List.of(new Rect(0, 0, metrics.widthPixels, metrics.heightPixels)));
+        }
+    }
 }