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Code Issues Projects Releases Wiki Activity

Create custom BriarRecyclerView and use it for the contact list.

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It is a common pattern to have a list with an empty view and a progress bar.
This commit introduces a custom BriarRecyclerView and uses it for the
contact list.

No more manually hiding and showing empty views and progress bars is
necessary when using the new BriarRecyclerView instead of RecyclerView.

Please note that this conflicts with !44 at the moment and needs to be
implemented for !36 once merged.

Closes #198
This commit is contained in:
Torsten Grote
2015-12-29 14:23:15 -02:00
parent e17765e80f
commit f309cb36d4
5 changed files with 167 additions and 85 deletions
Download Patch File Download Diff File Expand all files Collapse all files

47
briar-android/src/org/briarproject/android/contact/ContactListActivity.java
View File

@@ -4,15 +4,12 @@ import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.View.OnCreateContextMenuListener;
import android.widget.ProgressBar;
import android.widget.TextView;
import org.briarproject.R;
import org.briarproject.android.BriarActivity;
import org.briarproject.android.invitation.AddContactActivity;
import org.briarproject.android.util.BriarRecyclerView;
import org.briarproject.api.contact.Contact;
import org.briarproject.api.contact.ContactId;
import org.briarproject.api.contact.ContactManager;
@@ -38,22 +35,18 @@ import java.util.logging.Logger;
import javax.inject.Inject;
import static android.view.View.GONE;
import static android.view.View.VISIBLE;
import static java.util.logging.Level.INFO;
import static java.util.logging.Level.WARNING;
public class ContactListActivity extends BriarActivity
implements OnCreateContextMenuListener, EventListener {
implements EventListener {
private static final Logger LOG =
Logger.getLogger(ContactListActivity.class.getName());
@Inject private ConnectionRegistry connectionRegistry;
private TextView empty = null;
private ContactListAdapter adapter = null;
private RecyclerView list = null;
private ProgressBar loading = null;
private BriarRecyclerView list = null;
// Fields that are accessed from background threads must be volatile
@Inject private volatile ContactManager contactManager;
@@ -67,18 +60,10 @@ public class ContactListActivity extends BriarActivity
setContentView(R.layout.activity_contact_list);
adapter = new ContactListAdapter(this);
list = (RecyclerView) findViewById(R.id.contactList);
list = (BriarRecyclerView) findViewById(R.id.contactList);
list.setLayoutManager(new LinearLayoutManager(this));
list.setAdapter(adapter);
list.setOnCreateContextMenuListener(this);
list.setVisibility(GONE);
// Show a notice when there are no contacts
empty = (TextView) findViewById(R.id.emptyView);
// Show a progress bar while the list is loading
loading = (ProgressBar) findViewById(R.id.progressBar);
loading.setVisibility(VISIBLE);
list.setEmptyText(getString(R.string.no_contacts));
// Show a floating action button
FloatingActionButton fab = (FloatingActionButton) findViewById(
@@ -104,18 +89,12 @@ public class ContactListActivity extends BriarActivity
public void onResume() {
super.onResume();
eventBus.addListener(this);
loadContacts();
}
private void loadContacts() {
runOnUiThread(new Runnable() {
public void run() {
empty.setVisibility(GONE);
list.setVisibility(GONE);
loading.setVisibility(VISIBLE);
}
});
runOnDbThread(new Runnable() {
public void run() {
try {
@@ -154,15 +133,6 @@ public class ContactListActivity extends BriarActivity
private void displayContacts(final List<ContactListItem> contacts) {
runOnUiThread(new Runnable() {
public void run() {
if (contacts.size() > 0) {
list.setVisibility(VISIBLE);
empty.setVisibility(GONE);
} else {
list.setVisibility(GONE);
empty.setVisibility(VISIBLE);
}
loading.setVisibility(GONE);
adapter.addAll(contacts);
}
});
@@ -228,11 +198,6 @@ public class ContactListActivity extends BriarActivity
ContactListItem item = adapter.findItem(c);
if (item != null) {
adapter.remove(item);
if (adapter.isEmpty()) {
empty.setVisibility(VISIBLE);
list.setVisibility(GONE);
}
}
}
});

112
briar-android/src/org/briarproject/android/util/BriarRecyclerView.java Normal file
View File

@@ -0,0 +1,112 @@
package org.briarproject.android.util;
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.FrameLayout;
import android.widget.ProgressBar;
import android.widget.TextView;
import org.briarproject.R;
public class BriarRecyclerView extends FrameLayout {
private RecyclerView recyclerView;
private TextView emptyView;
private ProgressBar progressBar;
private RecyclerView.AdapterDataObserver emptyObserver;
public BriarRecyclerView(Context context) {
super(context);
initViews();
}
public BriarRecyclerView(Context context, AttributeSet attrs) {
super(context, attrs);
initViews();
}
public BriarRecyclerView(Context context, AttributeSet attrs,
int defStyle) {
super(context, attrs, defStyle);
initViews();
}
private void initViews() {
if (isInEditMode()) {
return;
}
View v = LayoutInflater.from(getContext()).inflate(
R.layout.briar_recycler_view, this, true);
recyclerView = (RecyclerView) v.findViewById(R.id.recyclerView);
emptyView = (TextView) v.findViewById(R.id.emptyView);
progressBar = (ProgressBar) v.findViewById(R.id.progressBar);
recyclerView.setVisibility(View.INVISIBLE);
emptyView.setVisibility(View.INVISIBLE);
progressBar.setVisibility(View.VISIBLE);
emptyObserver = new RecyclerView.AdapterDataObserver() {
@Override
public void onChanged() {
showData();
}
@Override
public void onItemRangeInserted(int positionStart, int itemCount) {
super.onItemRangeInserted(positionStart, itemCount);
onChanged();
}
};
}
public void setLayoutManager(RecyclerView.LayoutManager layout) {
recyclerView.setLayoutManager(layout);
}
public void setAdapter(RecyclerView.Adapter adapter) {
recyclerView.setAdapter(adapter);
if (adapter != null) {
adapter.registerAdapterDataObserver(emptyObserver);
if (adapter.getItemCount() > 0) {
// only show data if adapter has data already
// otherwise progress bar is shown
emptyObserver.onChanged();
}
}
}
public void setEmptyText(String text) {
emptyView.setText(text);
}
public void showProgressBar() {
recyclerView.setVisibility(View.INVISIBLE);
emptyView.setVisibility(View.INVISIBLE);
progressBar.setVisibility(View.VISIBLE);
}
private void showData() {
RecyclerView.Adapter<?> adapter = recyclerView.getAdapter();
if (adapter != null) {
if (adapter.getItemCount() == 0) {
emptyView.setVisibility(View.VISIBLE);
recyclerView.setVisibility(View.INVISIBLE);
} else {
emptyView.setVisibility(View.INVISIBLE);
recyclerView.setVisibility(View.VISIBLE);
}
progressBar.setVisibility(View.INVISIBLE);
}
}
}