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Code Issues Projects Releases Wiki Activity

[android] remember scroll position in individual blogs

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across configuration changes
This commit is contained in:
Torsten Grote
2019-03-08 16:33:15 -03:00
parent 741eae34e9
commit 2055961534
1 changed files with 27 additions and 2 deletions
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29
briar-android/src/main/java/org/briarproject/briar/android/blog/BlogFragment.java
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@@ -3,12 +3,14 @@ package org.briarproject.briar.android.blog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.os.Parcelable;
import android.support.annotation.UiThread;
import android.support.design.widget.Snackbar;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AlertDialog;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView.LayoutManager;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
@@ -62,9 +64,12 @@ public class BlogFragment extends BaseFragment
BlogController blogController;
@Inject
SharingController sharingController;
@Nullable
private Parcelable layoutManagerState;
private GroupId groupId;
private BlogPostAdapter adapter;
private LayoutManager layoutManager;
private BriarRecyclerView list;
private MenuItem writeButton, deleteButton;
private boolean isMyBlog = false, canDeleteBlog = false;
@@ -101,11 +106,17 @@ public class BlogFragment extends BaseFragment
adapter = new BlogPostAdapter(requireNonNull(getActivity()), this,
getFragmentManager());
list = v.findViewById(R.id.postList);
list.setLayoutManager(new LinearLayoutManager(getActivity()));
layoutManager = new LinearLayoutManager(getActivity());
list.setLayoutManager(layoutManager);
list.setAdapter(adapter);
list.showProgressBar();
list.setEmptyText(getString(R.string.blogs_other_blog_empty_state));
if (savedInstanceState != null) {
layoutManagerState =
savedInstanceState.getParcelable("layoutManager");
}
return v;
}
@@ -126,6 +137,15 @@ public class BlogFragment extends BaseFragment
list.stopPeriodicUpdate();
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
if (layoutManager != null) {
layoutManagerState = layoutManager.onSaveInstanceState();
outState.putParcelable("layoutManager", layoutManagerState);
}
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.blogs_blog_actions, menu);
@@ -238,7 +258,12 @@ public class BlogFragment extends BaseFragment
list.showData();
} else {
adapter.addAll(posts);
if (reload) list.scrollToPosition(0);
if (reload || layoutManagerState == null) {
list.scrollToPosition(0);
} else {
layoutManager.onRestoreInstanceState(
layoutManagerState);
}
}
}