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Commit d7f302fb authored by Sunny Shao's avatar Sunny Shao
Browse files

Fix suw display size flicker problem 

- 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
parent 6e12a31e

src/com/android/settings/accessibility/AccessibilityScreenSizeForSetupWizardActivity.java

+6 −1
Original line number Diff line number Diff line
@@ -63,6 +63,9 @@ public class AccessibilityScreenSizeForSetupWizardActivity extends InstrumentedA 
        int SCREEN_SIZE = 2;

    }



    // Keep the last height of the scroll view in the {@link GlifLayout}

    private int mLastScrollViewHeight;



    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
@@ -143,11 +146,13 @@ public class AccessibilityScreenSizeForSetupWizardActivity extends InstrumentedA 
     * Scrolls to bottom while {@link ScrollView} layout changed.

     */

    private void scrollToBottom() {

        mLastScrollViewHeight = 0;

        final GlifLayout layout = findViewById(R.id.setup_wizard_layout);

        final ScrollView scrollView = layout.getScrollView();

        scrollView.getViewTreeObserver().addOnGlobalLayoutListener(() -> {

            final int scrollViewHeight = scrollView.getHeight();

            if (scrollViewHeight > 0) {

            if (scrollViewHeight > 0 && scrollViewHeight != mLastScrollViewHeight) {

                mLastScrollViewHeight = scrollViewHeight;

                scrollView.post(() -> {

                    // Here is no need to show the scrolling animation. So disabled first and

                    // then enabled it after scrolling finished.