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/*
* Copyright (C) 2014 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 com.example.android.musicservicedemo;
import android.app.Fragment;
import android.content.ComponentName;
import android.content.Context;
import android.media.browse.MediaBrowser;
import android.media.session.MediaController;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import com.example.android.musicservicedemo.utils.LogHelper;
import java.util.ArrayList;
import java.util.List;
/**
* A Fragment that lists all the various browsable queues available
* from a {@link android.service.media.MediaBrowserService}.
* <p/>
* It uses a {@link MediaBrowser} to connect to the {@link MusicService}. Once connected,
* the fragment subscribes to get all the children. All {@link MediaBrowser.MediaItem}'s
* that can be browsed are shown in a ListView.
*/
public class BrowseFragment extends Fragment {
private static final String TAG = BrowseFragment.class.getSimpleName();
public static final String ARG_MEDIA_ID = "media_id";
public static interface FragmentDataHelper {
void onMediaItemSelected(MediaBrowser.MediaItem item);
}
// The mediaId to be used for subscribing for children using the MediaBrowser.
private String mMediaId;
private MediaBrowser mMediaBrowser;
private BrowseAdapter mBrowserAdapter;
private MediaBrowser.SubscriptionCallback mSubscriptionCallback = new MediaBrowser.SubscriptionCallback() {
@Override
public void onChildrenLoaded(String parentId, List<MediaBrowser.MediaItem> children) {
mBrowserAdapter.clear();
mBrowserAdapter.notifyDataSetInvalidated();
for (MediaBrowser.MediaItem item : children) {
mBrowserAdapter.add(item);
}
mBrowserAdapter.notifyDataSetChanged();
}
@Override
public void onError(String id) {
Toast.makeText(getActivity(), R.string.error_loading_media,
Toast.LENGTH_LONG).show();
}
};
private MediaBrowser.ConnectionCallback mConnectionCallback =
new MediaBrowser.ConnectionCallback() {
@Override
public void onConnected() {
LogHelper.d(TAG, "onConnected: session token " + mMediaBrowser.getSessionToken());
if (mMediaId == null) {
mMediaId = mMediaBrowser.getRoot();
}
mMediaBrowser.subscribe(mMediaId, mSubscriptionCallback);
if (mMediaBrowser.getSessionToken() == null) {
throw new IllegalArgumentException("No Session token");
}
MediaController mediaController = new MediaController(getActivity(),
mMediaBrowser.getSessionToken());
getActivity().setMediaController(mediaController);
}
@Override
public void onConnectionFailed() {
LogHelper.d(TAG, "onConnectionFailed");
}
@Override
public void onConnectionSuspended() {
LogHelper.d(TAG, "onConnectionSuspended");
getActivity().setMediaController(null);
}
};
public static BrowseFragment newInstance(String mediaId) {
Bundle args = new Bundle();
args.putString(ARG_MEDIA_ID, mediaId);
BrowseFragment fragment = new BrowseFragment();
fragment.setArguments(args);
return fragment;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_list, container, false);
mBrowserAdapter = new BrowseAdapter(getActivity());
View controls = rootView.findViewById(R.id.controls);
controls.setVisibility(View.GONE);
ListView listView = (ListView) rootView.findViewById(R.id.list_view);
listView.setAdapter(mBrowserAdapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
MediaBrowser.MediaItem item = mBrowserAdapter.getItem(position);
try {
FragmentDataHelper listener = (FragmentDataHelper) getActivity();
listener.onMediaItemSelected(item);
} catch (ClassCastException ex) {
Log.e(TAG, "Exception trying to cast to FragmentDataHelper", ex);
}
}
});
Bundle args = getArguments();
mMediaId = args.getString(ARG_MEDIA_ID, null);
mMediaBrowser = new MediaBrowser(getActivity(),
new ComponentName(getActivity(), MusicService.class),
mConnectionCallback, null);
return rootView;
}
@Override
public void onStart() {
super.onStart();
mMediaBrowser.connect();
}
@Override
public void onStop() {
super.onStop();
mMediaBrowser.disconnect();
}
// An adapter for showing the list of browsed MediaItem's
private static class BrowseAdapter extends ArrayAdapter<MediaBrowser.MediaItem> {
public BrowseAdapter(Context context) {
super(context, R.layout.media_list_item, new ArrayList<MediaBrowser.MediaItem>());
}
static class ViewHolder {
ImageView mImageView;
TextView mTitleView;
TextView mDescriptionView;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = LayoutInflater.from(getContext())
.inflate(R.layout.media_list_item, parent, false);
holder = new ViewHolder();
holder.mImageView = (ImageView) convertView.findViewById(R.id.play_eq);
holder.mImageView.setVisibility(View.GONE);
holder.mTitleView = (TextView) convertView.findViewById(R.id.title);
holder.mDescriptionView = (TextView) convertView.findViewById(R.id.description);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
MediaBrowser.MediaItem item = getItem(position);
holder.mTitleView.setText(item.getDescription().getTitle());
holder.mDescriptionView.setText(item.getDescription().getDescription());
if (item.isPlayable()) {
holder.mImageView.setImageDrawable(
getContext().getDrawable(R.drawable.ic_play_arrow_white_24dp));
holder.mImageView.setVisibility(View.VISIBLE);
}
return convertView;
}
}
}
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