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Add scroll to bottom button in conversation view

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Added a FloatingActionButton to the conversation_fragment
that appears and disappears using the same logic as the
existing compose divider: appear when the conversation list
is scrolled away from the bottom, disappear when the list is
scrolled to the bottom.

Fixes #5651
This commit is contained in:
Stuart Gilbert
2017-01-23 00:34:10 -08:00
committed by Moxie Marlinspike
parent 4c815db076
commit aa9d8e4d14
4 changed files with 32 additions and 2 deletions
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16
src/org/thoughtcrime/securesms/ConversationFragment.java
View File

@@ -91,6 +91,7 @@ public class ConversationFragment extends Fragment
private RecyclerView list;
private View loadMoreView;
private View composeDivider;
private View scrollToBottomButton;
@Override
public void onCreate(Bundle icicle) {
@@ -102,8 +103,16 @@ public class ConversationFragment extends Fragment
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle bundle) {
final View view = inflater.inflate(R.layout.conversation_fragment, container, false);
list = ViewUtil.findById(view, android.R.id.list);
composeDivider = ViewUtil.findById(view, R.id.compose_divider);
list = ViewUtil.findById(view, android.R.id.list);
composeDivider = ViewUtil.findById(view, R.id.compose_divider);
scrollToBottomButton = ViewUtil.findById(view, R.id.scroll_to_bottom_button);
scrollToBottomButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(final View view) {
scrollToBottom();
}
});
final LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity(), LinearLayoutManager.VERTICAL, true);
list.setHasFixedSize(false);
@@ -407,11 +416,14 @@ public class ConversationFragment extends Fragment
if (wasAtBottom != currentlyAtBottom) {
composeDivider.setVisibility(currentlyAtBottom ? View.INVISIBLE : View.VISIBLE);
scrollToBottomButton.setVisibility(currentlyAtBottom ? View.INVISIBLE : View.VISIBLE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR1) {
composeDivider.animate().alpha(currentlyAtBottom ? 0 : 1);
scrollToBottomButton.animate().alpha(currentlyAtBottom ? 0 : 1);
} else if (Build.VERSION.SDK_INT > Build.VERSION_CODES.HONEYCOMB) {
composeDivider.setAlpha(currentlyAtBottom ? 0 : 1);
scrollToBottomButton.setAlpha(currentlyAtBottom ? 0 : 1);
}
wasAtBottom = currentlyAtBottom;