1 /* 2 * Copyright 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.example.android.sampletvinput.rich; 18 19 import android.content.ContentResolver; 20 import android.content.Context; 21 import android.net.Uri; 22 import android.util.Log; 23 import android.util.Xml; 24 25 import com.example.android.sampletvinput.R; 26 import com.example.android.sampletvinput.rich.RichTvInputService.ChannelInfo; 27 import com.example.android.sampletvinput.rich.RichTvInputService.TvInput; 28 29 import org.xmlpull.v1.XmlPullParser; 30 import org.xmlpull.v1.XmlPullParserException; 31 32 import java.io.IOException; 33 import java.io.InputStream; 34 import java.net.URL; 35 import java.net.URLConnection; 36 import java.util.List; 37 38 /** 39 * Static helper methods for fetching the channel feed. 40 */ 41 public class RichFeedUtil { 42 private static final String TAG = "RichFeedUtil"; 43 private static List<ChannelInfo> sSampleChannels; 44 private static TvInput sTvInput; 45 46 private static final boolean USE_LOCAL_XML_FEED = false; 47 48 private RichFeedUtil() { 49 } 50 51 /** 52 * Returns the channel metadata for {@link RichTvInputService}. Note that this will block until 53 * the channel feed has been retrieved. 54 */ 55 public static List<ChannelInfo> getRichChannels(Context context) { 56 Uri catalogUri = 57 USE_LOCAL_XML_FEED ? 58 Uri.parse("android.resource://" + context.getPackageName() + "/" 59 + R.raw.rich_tv_inputs_tif) 60 : Uri.parse(context.getResources().getString(R.string.rich_input_feed_url)); 61 if (sSampleChannels != null) { 62 return sSampleChannels; 63 } 64 65 InputStream inputStream = null; 66 try { 67 if (ContentResolver.SCHEME_ANDROID_RESOURCE.equals(catalogUri.getScheme())) { 68 inputStream = context.getContentResolver().openInputStream(catalogUri); 69 } else { 70 URLConnection urlConnection = new URL(catalogUri.toString()).openConnection(); 71 inputStream = urlConnection.getInputStream(); 72 } 73 74 XmlPullParser parser = Xml.newPullParser(); 75 parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, false); 76 parser.setInput(inputStream, null); 77 sTvInput = ChannelXMLParser.parseTvInput(parser); 78 sSampleChannels = ChannelXMLParser.parseChannelXML(parser); 79 } catch (IOException e) { 80 Log.e(TAG, "Error in fetching " + catalogUri, e); 81 } catch (XmlPullParserException e) { 82 Log.e(TAG, "Error in parsing " + catalogUri, e); 83 } finally { 84 if (inputStream != null) { 85 try { 86 inputStream.close(); 87 } catch (IOException e) { 88 // Do nothing. 89 } 90 } 91 } 92 return sSampleChannels; 93 } 94 95 public static TvInput getTvInput(Context context) { 96 if (sTvInput == null) { 97 getRichChannels(context); 98 } 99 return sTvInput; 100 } 101 } 102
