媒體播放器的意圖過濾器（Youtube視頻播放）

Question

我開發了自己的媒體播放器，我希望當我想從Youtube上觀看視頻時，它應該從我的應用程序打開。至少，視圖上應該有一個媒體應用列表，我應該可以從列表中選擇我的應用。我對意圖過濾器知之甚少。我怎樣才能在我的清單文件中提供這個？我正在努力爲本地文件進行培訓，但我還沒有做到。我真的需要你的幫助：/

Answer 1

如果你看看意圖過濾器的官方YouTube應用程式使用，您將看到：

<activity android:name="Player"> 

    <intent-filter> 
     <action android:name="android.intent.action.VIEW" /> 
     <category android:name="android.intent.category.DEFAULT" /> 
     <category android:name="android.intent.category.BROWSABLE" /> 
     <data android:scheme="http" android:host="youtube.com" android:pathPrefix="/watch" /> 
     <data android:scheme="https" android:host="youtube.com" android:pathPrefix="/watch" /> 
    </intent-filter> 

    <intent-filter> 
     <action android:name="android.intent.action.VIEW" /> 
     <category android:name="android.intent.category.DEFAULT" /> 
     <category android:name="android.intent.category.BROWSABLE" /> 
     <data android:scheme="http" android:host="*.youtube.com" android:pathPrefix="/watch" /> 
     <data android:scheme="https" android:host="*.youtube.com" android:pathPrefix="/watch" /> 
    </intent-filter> 

    <intent-filter> 
     <action android:name="android.intent.action.VIEW" /> 
     <category android:name="android.intent.category.DEFAULT" /> 
     <category android:name="android.intent.category.BROWSABLE" /> 
     <data android:scheme="http" android:host="www.youtube.com" android:pathPrefix="/v/" /> 
     <data android:scheme="https" android:host="www.youtube.com" android:pathPrefix="/v/" /> 
     <data android:scheme="http" android:host="www.youtube.com" android:pathPrefix="/e/" /> 
     <data android:scheme="https" android:host="www.youtube.com" android:pathPrefix="/e/" /> 
     <data android:scheme="http" android:host="www.youtube.com" android:pathPrefix="/embed/" /> 
     <data android:scheme="https" android:host="www.youtube.com" android:pathPrefix="/embed/" /> 
    </intent-filter> 

    <intent-filter> 
     <action android:name="android.intent.action.VIEW" /> 
     <category android:name="android.intent.category.DEFAULT" /> 
     <category android:name="android.intent.category.BROWSABLE" /> 
     <data android:scheme="vnd.youtube" /> 
    </intent-filter> 

</activity> 

爲了讓你可以分析你得到的字符串中的視頻ID：

Uri uri = this.getIntent().getData(); 

正如你可以看到有對youtu.be沒有過濾器，但可以用添加：

<intent-filter> 
    <action android:name="android.intent.action.VIEW" /> 
    <category android:name="android.intent.category.DEFAULT" /> 
    <category android:name="android.intent.category.BROWSABLE" /> 
    <data android:scheme="http" android:host="youtu.be" /> 
    <data android:scheme="https" android:host="youtu.be" /> 
</intent-filter> 

Answer 2

我正在更新H9kDroid的答案，這是2011年的答案。這些是來自當前（2015年1月11日）最新YouTube APK的相關反編譯意圖過濾器。

<activity-alias android:theme="@01030055" 
    android:name="com.google.android.youtube.UrlActivity" 
    android:exported="true" 
    android:targetActivity="com.google.android.apps.youtube.app.honeycomb.Shell$UrlActivity"> 
    <intent-filter> 
    <action android:name="android.intent.action.VIEW"> 
    </action> 
    <action android:name="android.media.action.MEDIA_PLAY_FROM_SEARCH"> 
    </action> 
    <action android:name="android.nfc.action.NDEF_DISCOVERED"> 
    </action> 
    <category android:name="android.intent.category.DEFAULT"> 
    </category> 
    <category android:name="android.intent.category.BROWSABLE"> 
    </category> 
    <data android:scheme="http"> 
    </data> 
    <data android:scheme="https"> 
    </data> 
    <data android:host="youtube.com"> 
    </data> 
    <data android:host="www.youtube.com"> 
    </data> 
    <data android:host="m.youtube.com"> 
    </data> 
    <data android:host="youtu.be"> 
    </data> 
    <data android:pathPattern=".*"> 
    </data> 
    </intent-filter> 
    <intent-filter> 
    <action android:name="android.intent.action.VIEW"> 
    </action> 
    <action android:name="android.media.action.MEDIA_PLAY_FROM_SEARCH"> 
    </action> 
    <action android:name="android.nfc.action.NDEF_DISCOVERED"> 
    </action> 
    <category android:name="android.intent.category.DEFAULT"> 
    </category> 
    <category android:name="android.intent.category.BROWSABLE"> 
    </category> 
    <data android:scheme="vnd.youtube"> 
    </data> 
    <data android:scheme="vnd.youtube.launch"> 
    </data> 
    </intent-filter> 
</activity-alias> 

這就是這些意圖是如何在代碼中被解析的。對不起，這是混淆，但在我的情況仍然有用：

import android.net.Uri; 
import android.net.Uri.Builder; 
import android.text.TextUtils; 
import java.text.ParseException; 
import java.util.Arrays; 
import java.util.Collections; 
import java.util.HashMap; 
import java.util.Iterator; 
import java.util.List; 
import java.util.Map; 
import java.util.Set; 

public final class glb 
{ 
    public final List a; 
    public final int b; 

    private glb(String paramString, Map paramMap, int paramInt) 
    { 
    this(Collections.singletonList(paramString), paramMap, paramInt); 
    } 

    private glb(List paramList, Map paramMap, int paramInt) 
    { 
    this.a = Collections.unmodifiableList((List)b.c(paramList, "videoIds can not be null")); 
    if (!this.a.isEmpty()) {} 
    for (boolean bool = true;; bool = false) 
    { 
     b.c(bool, "videoIds cannot be empty"); 
     Collections.unmodifiableMap((Map)b.c(paramMap, "params can not be null")); 
     this.b = paramInt; 
     return; 
    } 
    } 

    private static int a(Uri paramUri, Map paramMap) 
    { 
    String str1 = (String)paramMap.get("t"); 
    if (str1 == null) 
    { 
     String str2 = Uri.decode(paramUri.getEncodedFragment()); 
     if (!TextUtils.isEmpty(str2)) 
     { 
     String[] arrayOfString1 = str2.split("&"); 
     int i = arrayOfString1.length; 
     for (int j = 0; j < i; j++) 
     { 
      String[] arrayOfString2 = arrayOfString1[j].split("="); 
      if ((arrayOfString2.length == 2) && ("t".equals(arrayOfString2[0]))) { 
      str1 = arrayOfString2[1]; 
      } 
     } 
     } 
    } 
    return a(str1); 
    } 

    private static int a(String paramString) 
    { 
    if (paramString == null) { 
     return 0; 
    } 
    int i = paramString.indexOf("h"); 
    int j; 
    if (i >= 0) 
    { 
     j = 0 + 3600000 * a.b(paramString.substring(0, i), 0); 
     paramString = paramString.substring(i + 1); 
    } 
    for (;;) 
    { 
     int k = paramString.indexOf("m"); 
     if (k >= 0) 
     { 
     j += 60000 * a.b(paramString.substring(0, k), 0); 
     paramString = paramString.substring(k + 1); 
     } 
     if (paramString.endsWith("s")) { 
     paramString = paramString.substring(0, -1 + paramString.length()); 
     } 
     return j + (int)(1000.0F * a.a(paramString, 0.0F)); 
     j = 0; 
    } 
    } 

    public static glb a(Uri paramUri) 
    { 
    if ("https".equals(paramUri.getScheme())) { 
     paramUri = paramUri.buildUpon().scheme("http").build(); 
    } 
    if ("vnd.youtube".equals(paramUri.getScheme())) 
    { 
     String str7 = paramUri.getSchemeSpecificPart(); 
     if (str7.startsWith("//")) { 
     str7 = str7.substring(2); 
     } 
     if (TextUtils.isEmpty(str7)) 
     { 
     String str9 = String.valueOf(paramUri); 
     throw new ParseException(24 + String.valueOf(str9).length() + "No video id in the Uri: " + str9, 0); 
     } 
     int i = str7.indexOf('?'); 
     if (i > 0) {} 
     for (String str8 = str7.substring(0, i);; str8 = str7) 
     { 
     Map localMap3 = b(paramUri); 
     return new glb(str8, localMap3, a((String)localMap3.get("t"))); 
     } 
    } 
    if ("youtu.be".equalsIgnoreCase(paramUri.getHost())) 
    { 
     List localList = paramUri.getPathSegments(); 
     if ((localList.isEmpty()) || (TextUtils.isEmpty((CharSequence)localList.get(0)))) 
     { 
     String str6 = String.valueOf(paramUri); 
     throw new ParseException(29 + String.valueOf(str6).length() + "No video id in the Uri path: " + str6, 0); 
     } 
     Map localMap2 = b(paramUri); 
     return new glb(localList.subList(0, 1), a(localMap2), a(paramUri, localMap2)); 
    } 
    String str1 = paramUri.getPath(); 
    String str2 = paramUri.getFragment(); 
    if ((str1.startsWith("/watch")) || (str1.startsWith("/movie"))) { 
     return c(paramUri); 
    } 
    if (str1.startsWith("/get_video")) 
    { 
     Map localMap1 = b(paramUri); 
     String str4 = (String)localMap1.get("video_id"); 
     if (!TextUtils.isEmpty(str4)) { 
     return new glb(str4, a(localMap1), a(paramUri, localMap1)); 
     } 
     String str5 = String.valueOf(paramUri); 
     throw new ParseException(24 + String.valueOf(str5).length() + "No id found in the uri: " + str5, 0); 
    } 
    if (str1.startsWith("/v/")) { 
     return d(paramUri); 
    } 
    if ((str1.startsWith("/e/")) || (str1.startsWith("/embed/"))) { 
     return new glb(paramUri.getLastPathSegment(), b(paramUri), a(paramUri.getQueryParameter("start"))); 
    } 
    if ((str2 != null) && ((str2.startsWith("/watch")) || (str2.startsWith("watch")))) 
    { 
     String str3 = paramUri.getFragment(); 
     return c(Uri.parse(paramUri.buildUpon().encodedPath(str3).fragment("").build().toString())); 
    } 
    throw new ParseException("Unrecognised URI", 0); 
    } 

    private static Map a(Map paramMap) 
    { 
    HashMap localHashMap = new HashMap(paramMap); 
    localHashMap.remove("v"); 
    localHashMap.remove("video_id"); 
    localHashMap.remove("video_ids"); 
    localHashMap.remove("feature"); 
    return localHashMap; 
    } 

    private static Map b(Uri paramUri) 
    { 
    if (paramUri.isOpaque()) { 
     return Collections.emptyMap(); 
    } 
    HashMap localHashMap = new HashMap(); 
    Iterator localIterator = paramUri.getQueryParameterNames().iterator(); 
    while (localIterator.hasNext()) 
    { 
     String str = (String)localIterator.next(); 
     localHashMap.put(str, paramUri.getQueryParameter(str)); 
    } 
    return localHashMap; 
    } 

    private static glb c(Uri paramUri) 
    { 
    Map localMap = b(paramUri); 
    String str1 = (String)localMap.get("v"); 
    String str2 = (String)localMap.get("video_ids"); 
    if ((TextUtils.isEmpty(str1)) && (TextUtils.isEmpty(str2))) 
    { 
     List localList = paramUri.getPathSegments(); 
     int i = localList.indexOf("watch"); 
     if (i < 0) 
     { 
     String str6 = String.valueOf(paramUri); 
     throw new ParseException(28 + String.valueOf(str6).length() + "No /watch/ part in the Uri: " + str6, 0); 
     } 
     if (i + 1 >= localList.size()) 
     { 
     String str5 = String.valueOf(paramUri); 
     throw new ParseException(24 + String.valueOf(str5).length() + "No id found in the Uri: " + str5, 0); 
     } 
     str1 = (String)localList.get(i + 1); 
     if (TextUtils.isEmpty(str1)) 
     { 
     String str4 = String.valueOf(paramUri); 
     throw new ParseException(24 + String.valueOf(str4).length() + "No video id in the Uri: " + str4, 0); 
     } 
    } 
    String str3 = str1; 
    if (str2 == null) { 
     return new glb(str3, a(localMap), a(paramUri, localMap)); 
    } 
    return new glb(Arrays.asList(str2.split(",")), a(localMap), a(paramUri, localMap)); 
    } 

    private static glb d(Uri paramUri) 
    { 
    String[] arrayOfString1 = paramUri.getLastPathSegment().split("&"); 
    String str = arrayOfString1[0]; 
    HashMap localHashMap = new HashMap(); 
    for (int i = 1; i < arrayOfString1.length; i++) 
    { 
     String[] arrayOfString2 = arrayOfString1[i].split("="); 
     if (arrayOfString2.length == 2) { 
     localHashMap.put(arrayOfString2[0], arrayOfString2[1]); 
     } 
    } 
    return new glb(str, localHashMap, a((String)localHashMap.get("start"))); 
    } 
}