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-rw-r--r--core/java/android/view/ViewRootImpl.java32
1 files changed, 27 insertions, 5 deletions
diff --git a/core/java/android/view/ViewRootImpl.java b/core/java/android/view/ViewRootImpl.java
index ea1dadb..57c6cbf 100644
--- a/core/java/android/view/ViewRootImpl.java
+++ b/core/java/android/view/ViewRootImpl.java
@@ -174,6 +174,9 @@ public final class ViewRootImpl implements ViewParent,
// so the window should no longer be active.
boolean mStopped = false;
+ // Set to true to stop input during an Activity Transition.
+ boolean mPausedForTransition = false;
+
boolean mLastInCompatMode = false;
SurfaceHolder.Callback2 mSurfaceHolderCallback;
@@ -982,15 +985,25 @@ public final class ViewRootImpl implements ViewParent,
return null;
}
- void setStopped(boolean stopped) {
+ void setWindowStopped(boolean stopped) {
if (mStopped != stopped) {
mStopped = stopped;
- if (!stopped) {
+ if (!mStopped) {
scheduleTraversals();
}
}
}
+ /**
+ * Block the input events during an Activity Transition. The KEYCODE_BACK event is allowed
+ * through to allow quick reversal of the Activity Transition.
+ *
+ * @param paused true to pause, false to resume.
+ */
+ public void setPausedForTransition(boolean paused) {
+ mPausedForTransition = paused;
+ }
+
@Override
public ViewParent getParent() {
return null;
@@ -3637,8 +3650,9 @@ public final class ViewRootImpl implements ViewParent,
if (mView == null || !mAdded) {
Slog.w(TAG, "Dropping event due to root view being removed: " + q.mEvent);
return true;
- } else if ((!mAttachInfo.mHasWindowFocus || mStopped)
- && !q.mEvent.isFromSource(InputDevice.SOURCE_CLASS_POINTER)) {
+ } else if ((!mAttachInfo.mHasWindowFocus
+ && !q.mEvent.isFromSource(InputDevice.SOURCE_CLASS_POINTER)) || mStopped
+ || (mPausedForTransition && !isBack(q.mEvent))) {
// This is a focus event and the window doesn't currently have input focus or
// has stopped. This could be an event that came back from the previous stage
// but the window has lost focus or stopped in the meantime.
@@ -3661,6 +3675,14 @@ public final class ViewRootImpl implements ViewParent,
mNext.dump(prefix, writer);
}
}
+
+ private boolean isBack(InputEvent event) {
+ if (event instanceof KeyEvent) {
+ return ((KeyEvent) event).getKeyCode() == KeyEvent.KEYCODE_BACK;
+ } else {
+ return false;
+ }
+ }
}
/**
@@ -6228,7 +6250,7 @@ public final class ViewRootImpl implements ViewParent,
@Override
public boolean requestSendAccessibilityEvent(View child, AccessibilityEvent event) {
- if (mView == null) {
+ if (mView == null || mStopped || mPausedForTransition) {
return false;
}
// Intercept accessibility focus events fired by virtual nodes to keep