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Fix suw display size flicker problem

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- Swipe the preview area will invoke the OnGlobalLayoutListener.
- Sometime it cause a flicker when scroll view scrolling up and
  preivew area swiping.
- It is no need to scroll up if the height of scroll view does not change.

Fixes: 205918748
Test: manual test
Change-Id: I8ed5454d32f0cf2a7bc3bac45c7aa054ce929c4b
This commit is contained in:
Sunny Shao
2021-11-11 15:10:59 +08:00
parent 6e12a31e5f
commit d7f302fb4e
1 changed files with 6 additions and 1 deletions
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7
src/com/android/settings/accessibility/AccessibilityScreenSizeForSetupWizardActivity.java
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@@ -63,6 +63,9 @@ public class AccessibilityScreenSizeForSetupWizardActivity extends InstrumentedA
int SCREEN_SIZE = 2; int SCREEN_SIZE = 2;
} }
// Keep the last height of the scroll view in the {@link GlifLayout}
private int mLastScrollViewHeight;
@Override @Override
protected void onCreate(Bundle savedInstanceState) { protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState); super.onCreate(savedInstanceState);
@@ -143,11 +146,13 @@ public class AccessibilityScreenSizeForSetupWizardActivity extends InstrumentedA
* Scrolls to bottom while {@link ScrollView} layout changed. * Scrolls to bottom while {@link ScrollView} layout changed.
*/ */
private void scrollToBottom() { private void scrollToBottom() {
mLastScrollViewHeight = 0;
final GlifLayout layout = findViewById(R.id.setup_wizard_layout); final GlifLayout layout = findViewById(R.id.setup_wizard_layout);
final ScrollView scrollView = layout.getScrollView(); final ScrollView scrollView = layout.getScrollView();
scrollView.getViewTreeObserver().addOnGlobalLayoutListener(() -> { scrollView.getViewTreeObserver().addOnGlobalLayoutListener(() -> {
final int scrollViewHeight = scrollView.getHeight(); final int scrollViewHeight = scrollView.getHeight();
if (scrollViewHeight > 0) { if (scrollViewHeight > 0 && scrollViewHeight != mLastScrollViewHeight) {
mLastScrollViewHeight = scrollViewHeight;
scrollView.post(() -> { scrollView.post(() -> {
// Here is no need to show the scrolling animation. So disabled first and // Here is no need to show the scrolling animation. So disabled first and
// then enabled it after scrolling finished. // then enabled it after scrolling finished.