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Code Issues Projects Releases Wiki Activity

Blog Feed: Show 'Scroll To' link only if scrolling possible

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This commit is contained in:
Torsten Grote
2016-07-04 16:28:57 -03:00
parent fd7278b488
commit d8b5710a42
1 changed files with 31 additions and 30 deletions
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61
briar-android/src/org/briarproject/android/blogs/FeedFragment.java
View File

@@ -43,6 +43,7 @@ public class FeedFragment extends BaseFragment implements
FeedController feedController; FeedController feedController;
private BlogPostAdapter adapter; private BlogPostAdapter adapter;
private LinearLayoutManager layoutManager;
private BriarRecyclerView list; private BriarRecyclerView list;
private Blog personalBlog = null; private Blog personalBlog = null;
@@ -64,8 +65,10 @@ public class FeedFragment extends BaseFragment implements
View v = inflater.inflate(R.layout.fragment_blog, container, false); View v = inflater.inflate(R.layout.fragment_blog, container, false);
adapter = new BlogPostAdapter(getActivity(), this); adapter = new BlogPostAdapter(getActivity(), this);
layoutManager = new LinearLayoutManager(getActivity());
list = (BriarRecyclerView) v.findViewById(R.id.postList); list = (BriarRecyclerView) v.findViewById(R.id.postList);
list.setLayoutManager(new LinearLayoutManager(getActivity())); list.setLayoutManager(layoutManager);
list.setAdapter(adapter); list.setAdapter(adapter);
list.setEmptyText(R.string.blogs_feed_empty_state); list.setEmptyText(R.string.blogs_feed_empty_state);
@@ -84,20 +87,7 @@ public class FeedFragment extends BaseFragment implements
// The BlogPostAddedEvent arrives when the controller is not listening // The BlogPostAddedEvent arrives when the controller is not listening
if (requestCode == REQUEST_WRITE_POST && resultCode == RESULT_OK) { if (requestCode == REQUEST_WRITE_POST && resultCode == RESULT_OK) {
// show snackbar informing about successful post creation showSnackBar(R.string.blogs_blog_post_created);
Snackbar s = Snackbar.make(list, R.string.blogs_blog_post_created,
LENGTH_LONG);
s.getView().setBackgroundResource(R.color.briar_primary);
OnClickListener onClick = new OnClickListener() {
@Override
public void onClick(View v) {
list.smoothScrollToPosition(0);
}
};
s.setActionTextColor(ContextCompat
.getColor(getContext(), R.color.briar_button_positive));
s.setAction(R.string.blogs_blog_post_scroll_to, onClick);
s.show();
} }
} }
@@ -136,7 +126,7 @@ public class FeedFragment extends BaseFragment implements
public void onPause() { public void onPause() {
super.onPause(); super.onPause();
feedController.onPause(); feedController.onPause();
// TODO save list position // TODO save list position in database/preferences?
} }
@Override @Override
@@ -172,20 +162,7 @@ public class FeedFragment extends BaseFragment implements
@Override @Override
public void run() { public void run() {
adapter.add(post); adapter.add(post);
Snackbar s = showSnackBar(R.string.blogs_blog_post_received);
Snackbar.make(list, R.string.blogs_blog_post_received,
LENGTH_LONG);
s.getView().setBackgroundResource(R.color.briar_primary);
OnClickListener onClick = new OnClickListener() {
@Override
public void onClick(View v) {
list.smoothScrollToPosition(0);
}
};
s.setActionTextColor(ContextCompat
.getColor(getContext(), R.color.briar_button_positive));
s.setAction(R.string.blogs_blog_post_scroll_to, onClick);
s.show();
} }
}); });
} }
@@ -199,4 +176,28 @@ public class FeedFragment extends BaseFragment implements
public String getUniqueTag() { public String getUniqueTag() {
return TAG; return TAG;
} }
private void showSnackBar(int stringRes) {
int firstVisible =
layoutManager.findFirstCompletelyVisibleItemPosition();
int lastVisible = layoutManager.findLastCompletelyVisibleItemPosition();
int count = adapter.getItemCount();
boolean scroll = count > (lastVisible - firstVisible + 1);
Snackbar s = Snackbar.make(list, stringRes, LENGTH_LONG);
s.getView().setBackgroundResource(R.color.briar_primary);
if (scroll) {
OnClickListener onClick = new OnClickListener() {
@Override
public void onClick(View v) {
list.smoothScrollToPosition(0);
}
};
s.setActionTextColor(ContextCompat
.getColor(getContext(),
R.color.briar_button_positive));
s.setAction(R.string.blogs_blog_post_scroll_to, onClick);
}
s.show();
}
} }