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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.DialogInterface;
import android.content.Intent; import android.content.Intent;
import android.os.Bundle; import android.os.Bundle;
import android.os.Parcelable;
import android.support.annotation.UiThread; import android.support.annotation.UiThread;
import android.support.design.widget.Snackbar; import android.support.design.widget.Snackbar;
import android.support.v4.content.ContextCompat; import android.support.v4.content.ContextCompat;
import android.support.v7.app.ActionBar; import android.support.v7.app.ActionBar;
import android.support.v7.app.AlertDialog; import android.support.v7.app.AlertDialog;
import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView.LayoutManager;
import android.view.LayoutInflater; import android.view.LayoutInflater;
import android.view.Menu; import android.view.Menu;
import android.view.MenuInflater; import android.view.MenuInflater;
@@ -62,9 +64,12 @@ public class BlogFragment extends BaseFragment
BlogController blogController; BlogController blogController;
@Inject @Inject
SharingController sharingController; SharingController sharingController;
@Nullable
private Parcelable layoutManagerState;
private GroupId groupId; private GroupId groupId;
private BlogPostAdapter adapter; private BlogPostAdapter adapter;
private LayoutManager layoutManager;
private BriarRecyclerView list; private BriarRecyclerView list;
private MenuItem writeButton, deleteButton; private MenuItem writeButton, deleteButton;
private boolean isMyBlog = false, canDeleteBlog = false; private boolean isMyBlog = false, canDeleteBlog = false;
@@ -101,11 +106,17 @@ public class BlogFragment extends BaseFragment
adapter = new BlogPostAdapter(requireNonNull(getActivity()), this, adapter = new BlogPostAdapter(requireNonNull(getActivity()), this,
getFragmentManager()); getFragmentManager());
list = v.findViewById(R.id.postList); list = v.findViewById(R.id.postList);
list.setLayoutManager(new LinearLayoutManager(getActivity())); layoutManager = new LinearLayoutManager(getActivity());
list.setLayoutManager(layoutManager);
list.setAdapter(adapter); list.setAdapter(adapter);
list.showProgressBar(); list.showProgressBar();
list.setEmptyText(getString(R.string.blogs_other_blog_empty_state)); list.setEmptyText(getString(R.string.blogs_other_blog_empty_state));
if (savedInstanceState != null) {
layoutManagerState =
savedInstanceState.getParcelable("layoutManager");
}
return v; return v;
} }
@@ -126,6 +137,15 @@ public class BlogFragment extends BaseFragment
list.stopPeriodicUpdate(); list.stopPeriodicUpdate();
} }
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
if (layoutManager != null) {
layoutManagerState = layoutManager.onSaveInstanceState();
outState.putParcelable("layoutManager", layoutManagerState);
}
}
@Override @Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.blogs_blog_actions, menu); inflater.inflate(R.menu.blogs_blog_actions, menu);
@@ -238,7 +258,12 @@ public class BlogFragment extends BaseFragment
list.showData(); list.showData();
} else { } else {
adapter.addAll(posts); adapter.addAll(posts);
if (reload) list.scrollToPosition(0); if (reload || layoutManagerState == null) {
list.scrollToPosition(0);
} else {
layoutManager.onRestoreInstanceState(
layoutManagerState);
}
} }
} }