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Fine tune the homepage scrolling behavior

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Scroll to the highlight position before showing homepage.

Bug: 199017944
Bug: 204946469
Test: visual
Change-Id: I11708f42180a3af22855ac7b5f53460f737ed208
This commit is contained in:
Jason Chiu
2021-11-04 17:09:53 +08:00
parent 774c2181ea
commit ae5327d4bb
5 changed files with 58 additions and 18 deletions
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27
src/com/android/settings/widget/HighlightableTopLevelPreferenceAdapter.java
View File

@@ -38,7 +38,8 @@ import com.android.settings.homepage.SettingsHomepageActivity;
/**
* Adapter for highlighting top level preferences
*/
public class HighlightableTopLevelPreferenceAdapter extends PreferenceGroupAdapter {
public class HighlightableTopLevelPreferenceAdapter extends PreferenceGroupAdapter implements
SettingsHomepageActivity.HomepageLoadedListener {
private static final String TAG = "HighlightableTopLevelAdapter";
@@ -60,6 +61,7 @@ public class HighlightableTopLevelPreferenceAdapter extends PreferenceGroupAdapt
private String mHighlightKey;
private String mPreviousHighlightKey;
private int mHighlightPosition = RecyclerView.NO_POSITION;
private int mScrollPosition = RecyclerView.NO_POSITION;
private boolean mHighlightNeeded;
private boolean mScrolled;
@@ -135,9 +137,11 @@ public class HighlightableTopLevelPreferenceAdapter extends PreferenceGroupAdapt
return;
}
// Scroll before highlight if needed.
final boolean highlightNeeded = isHighlightNeeded();
if (highlightNeeded) {
scrollToPositionIfNeeded(position);
mScrollPosition = position;
scroll();
}
// Turn on/off highlight when screen split mode is changed.
@@ -189,26 +193,29 @@ public class HighlightableTopLevelPreferenceAdapter extends PreferenceGroupAdapt
requestHighlight();
}
private void scrollToPositionIfNeeded(int position) {
if (mScrolled || position < 0) {
@Override
public void onHomepageLoaded() {
scroll();
}
private void scroll() {
if (mScrolled || mScrollPosition < 0) {
return;
}
if (mHomepageActivity.registerHomepageLoadedListenerIfNeeded(
() -> scrollToPositionIfNeeded(position))) {
if (mHomepageActivity.registerHomepageLoadedListenerIfNeeded(this)) {
return;
}
// Only when the recyclerView is loaded, it can be scrolled
final View view = mRecyclerView.getChildAt(position);
final View view = mRecyclerView.getChildAt(mScrollPosition);
if (view == null) {
mRecyclerView.postDelayed(() -> scrollToPositionIfNeeded(position),
DELAY_HIGHLIGHT_DURATION_MILLIS);
mRecyclerView.postDelayed(() -> scroll(), DELAY_HIGHLIGHT_DURATION_MILLIS);
return;
}
mScrolled = true;
Log.d(TAG, "Scroll to position " + position);
Log.d(TAG, "Scroll to position " + mScrollPosition);
// Scroll to the top to reset the position.
mRecyclerView.nestedScrollBy(0, -mRecyclerView.getHeight());