Move getUserAgent from DemoUtil to library's Util.

demo/src/main/java/com/google/android/exoplayer/demo/DemoUtil.java

@@ -56,19 +56,6 @@ public class DemoUtil {
     defaultCookieManager.setCookiePolicy(CookiePolicy.ACCEPT_ORIGINAL_SERVER);
   }
 
-  public static String getUserAgent(Context context) {
-    String versionName;
-    try {
-      String packageName = context.getPackageName();
-      PackageInfo info = context.getPackageManager().getPackageInfo(packageName, 0);
-      versionName = info.versionName;
-    } catch (NameNotFoundException e) {
-      versionName = "?";
-    }
-    return "ExoPlayerDemo/" + versionName + " (Linux;Android " + Build.VERSION.RELEASE +
-        ") " + "ExoPlayerLib/" + ExoPlayerLibraryInfo.VERSION;
-  }
-
   public static byte[] executePost(String url, byte[] data, Map<String, String> requestProperties)
       throws MalformedURLException, IOException {
     HttpURLConnection urlConnection = null;

demo/src/main/java/com/google/android/exoplayer/demo/PlayerActivity.java

@@ -219,7 +219,7 @@ public class PlayerActivity extends Activity implements SurfaceHolder.Callback,
   // Internal methods
 
   private RendererBuilder getRendererBuilder() {
-    String userAgent = DemoUtil.getUserAgent(this);
+    String userAgent = Util.getUserAgent(this, "ExoPlayerDemo");
     switch (contentType) {
       case DemoUtil.TYPE_SS:
         return new SmoothStreamingRendererBuilder(userAgent, contentUri.toString(),

library/src/main/java/com/google/android/exoplayer/util/Util.java

@@ -16,9 +16,14 @@
 package com.google.android.exoplayer.util;
 
 import com.google.android.exoplayer.C;
+import com.google.android.exoplayer.ExoPlayerLibraryInfo;
 import com.google.android.exoplayer.upstream.DataSource;
 import com.google.android.exoplayer.upstream.DataSpec;
 
+import android.content.Context;
+import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager.NameNotFoundException;
+import android.os.Build;
 import android.text.TextUtils;
 
 import java.io.IOException;
@@ -495,4 +500,24 @@ public final class Util {
     return result;
   }
 
+  /**
+   * Returns a user agent string based on the given application name and the library version.
+   *
+   * @param context A valid context of the calling application.
+   * @param applicationName String that will be prefix'ed to the generated user agent.
+   * @return A user agent string generated using the applicationName and the library version.
+   */
+  public static String getUserAgent(Context context, String applicationName) {
+    String versionName;
+    try {
+      String packageName = context.getPackageName();
+      PackageInfo info = context.getPackageManager().getPackageInfo(packageName, 0);
+      versionName = info.versionName;
+    } catch (NameNotFoundException e) {
+      versionName = "?";
+    }
+    return applicationName + "/" + versionName + " (Linux;Android " + Build.VERSION.RELEASE
+        + ") " + "ExoPlayerLib/" + ExoPlayerLibraryInfo.VERSION;
+  }
+
 }