Modify the sharing flow to first show a list of applications.

Store preferred account as a sharing setting.
Remove share url only option. Apply share url only if twitter is selected.

MyTracks/src/com/google/android/apps/mytracks/util/IntentUtils.java

@@ -16,6 +16,9 @@
 
 package com.google.android.apps.mytracks.util;
 
+import com.google.android.maps.mytracks.R;
+
+import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
 
@@ -26,6 +29,9 @@ import android.content.Intent;
  */
 public class IntentUtils {
 
+  public static final String TEXT_PLAIN_TYPE = "text/plain";
+  private static final String TWITTER_PACKAGE_NAME = "com.twitter.android";
+
   private IntentUtils() {}
 
   /**
@@ -39,4 +45,23 @@ public class IntentUtils {
     return new Intent(context, cls).addFlags(
         Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
   }
+
+  /**
+   * Creates an intent to share a url with a sharing app.
+   * 
+   * @param context the context
+   * @param url the url
+   * @param packageName the sharing app package name
+   * @param className the sharing app class name
+   */
+  public static final Intent newShareUrlIntent(
+      Context context, String url, String packageName, String className) {
+    return new Intent(Intent.ACTION_SEND)
+        .addFlags(Intent.FLAG_ACTIVITY_FORWARD_RESULT | Intent.FLAG_ACTIVITY_PREVIOUS_IS_TOP)
+        .putExtra(Intent.EXTRA_SUBJECT, context.getString(R.string.share_track_subject))
+        .putExtra(Intent.EXTRA_TEXT, TWITTER_PACKAGE_NAME.equals(packageName) 
+            ? url : context.getString(R.string.share_track_url_body_format, url))
+        .setComponent(new ComponentName(packageName, className))
+        .setType(TEXT_PLAIN_TYPE);
+  }
 }