/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.support.v7.app;
import android.app.Dialog;
import android.content.Context;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v7.media.MediaRouter;
import android.support.v7.media.MediaRouteSelector;
import android.support.v7.mediarouter.R;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
/**
* This class implements the route chooser dialog for {@link MediaRouter}.
* <p>
* This dialog allows the user to choose a route that matches a given selector.
* </p>
*
* @see MediaRouteButton
* @see MediaRouteActionProvider
*/
public class MediaRouteChooserDialog extends Dialog {
private final MediaRouter mRouter;
private final MediaRouterCallback mCallback;
private MediaRouteSelector mSelector = MediaRouteSelector.EMPTY;
private ArrayList<MediaRouter.RouteInfo> mRoutes;
private RouteAdapter mAdapter;
private ListView mListView;
private boolean mAttachedToWindow;
public MediaRouteChooserDialog(Context context) {
this(context, 0);
}
public MediaRouteChooserDialog(Context context, int theme) {
super(MediaRouterThemeHelper.createThemedContext(context), theme);
context = getContext();
mRouter = MediaRouter.getInstance(context);
mCallback = new MediaRouterCallback();
}
/**
* Gets the media route selector for filtering the routes that the user can select.
*
* @return The selector, never null.
*/
@NonNull
public MediaRouteSelector getRouteSelector() {
return mSelector;
}
/**
* Sets the media route selector for filtering the routes that the user can select.
*
* @param selector The selector, must not be null.
*/
public void setRouteSelector(@NonNull MediaRouteSelector selector) {
if (selector == null) {
throw new IllegalArgumentException("selector must not be null");
}
if (!mSelector.equals(selector)) {
mSelector = selector;
if (mAttachedToWindow) {
mRouter.removeCallback(mCallback);
mRouter.addCallback(selector, mCallback,
MediaRouter.CALLBACK_FLAG_PERFORM_ACTIVE_SCAN);
}
refreshRoutes();
}
}
/**
* Called to filter the set of routes that should be included in the list.
* <p>
* The default implementation iterates over all routes in the provided list and
* removes those for which {@link #onFilterRoute} returns false.
* </p>
*
* @param routes The list of routes to filter in-place, never null.
*/
public void onFilterRoutes(@NonNull List<MediaRouter.RouteInfo> routes) {
for (int i = routes.size(); i-- > 0; ) {
if (!onFilterRoute(routes.get(i))) {
routes.remove(i);
}
}
}
/**
* Returns true if the route should be included in the list.
* <p>
* The default implementation returns true for enabled non-default routes that
* match the selector. Subclasses can override this method to filter routes
* differently.
* </p>
*
* @param route The route to consider, never null.
* @return True if the route should be included in the chooser dialog.
*/
public boolean onFilterRoute(@NonNull MediaRouter.RouteInfo route) {
return !route.isDefault() && route.isEnabled() && route.matchesSelector(mSelector);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().requestFeature(Window.FEATURE_LEFT_ICON);
setContentView(R.layout.mr_media_route_chooser_dialog);
setTitle(R.string.mr_media_route_chooser_title);
// Must be called after setContentView.
getWindow().setFeatureDrawableResource(Window.FEATURE_LEFT_ICON,
MediaRouterThemeHelper.getThemeResource(
getContext(), R.attr.mediaRouteOffDrawable));
mRoutes = new ArrayList<MediaRouter.RouteInfo>();
mAdapter = new RouteAdapter(getContext(), mRoutes);
mListView = (ListView)findViewById(R.id.media_route_list);
mListView.setAdapter(mAdapter);
mListView.setOnItemClickListener(mAdapter);
mListView.setEmptyView(findViewById(android.R.id.empty));
}
@Override
public void onAttachedToWindow() {
super.onAttachedToWindow();
mAttachedToWindow = true;
mRouter.addCallback(mSelector, mCallback, MediaRouter.CALLBACK_FLAG_PERFORM_ACTIVE_SCAN);
refreshRoutes();
}
@Override
public void onDetachedFromWindow() {
mAttachedToWindow = false;
mRouter.removeCallback(mCallback);
super.onDetachedFromWindow();
}
/**
* Refreshes the list of routes that are shown in the chooser dialog.
*/
public void refreshRoutes() {
if (mAttachedToWindow) {
mRoutes.clear();
mRoutes.addAll(mRouter.getRoutes());
onFilterRoutes(mRoutes);
Collections.sort(mRoutes, RouteComparator.sInstance);
mAdapter.notifyDataSetChanged();
}
}
private final class RouteAdapter extends ArrayAdapter<MediaRouter.RouteInfo>
implements ListView.OnItemClickListener {
private final LayoutInflater mInflater;
public RouteAdapter(Context context, List<MediaRouter.RouteInfo> routes) {
super(context, 0, routes);
mInflater = LayoutInflater.from(context);
}
@Override
public boolean areAllItemsEnabled() {
return false;
}
@Override
public boolean isEnabled(int position) {
return getItem(position).isEnabled();
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = convertView;
if (view == null) {
view = mInflater.inflate(R.layout.mr_media_route_list_item, parent, false);
}
MediaRouter.RouteInfo route = getItem(position);
TextView text1 = (TextView)view.findViewById(android.R.id.text1);
TextView text2 = (TextView)view.findViewById(android.R.id.text2);
text1.setText(route.getName());
String description = route.getDescription();
if (TextUtils.isEmpty(description)) {
text2.setVisibility(View.GONE);
text2.setText("");
} else {
text2.setVisibility(View.VISIBLE);
text2.setText(description);
}
view.setEnabled(route.isEnabled());
return view;
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
MediaRouter.RouteInfo route = getItem(position);
if (route.isEnabled()) {
route.select();
dismiss();
}
}
}
private final class MediaRouterCallback extends MediaRouter.Callback {
@Override
public void onRouteAdded(MediaRouter router, MediaRouter.RouteInfo info) {
refreshRoutes();
}
@Override
public void onRouteRemoved(MediaRouter router, MediaRouter.RouteInfo info) {
refreshRoutes();
}
@Override
public void onRouteChanged(MediaRouter router, MediaRouter.RouteInfo info) {
refreshRoutes();
}
@Override
public void onRouteSelected(MediaRouter router, MediaRouter.RouteInfo route) {
dismiss();
}
}
private static final class RouteComparator implements Comparator<MediaRouter.RouteInfo> {
public static final RouteComparator sInstance = new RouteComparator();
@Override
public int compare(MediaRouter.RouteInfo lhs, MediaRouter.RouteInfo rhs) {
return lhs.getName().compareTo(rhs.getName());
}
}
}