Fixed tabhost resource id.

src/main/java/de/dennisguse/opentracks/TrackDetailActivity.java

@@ -201,7 +201,7 @@ public class TrackDetailActivity extends AbstractListActivity implements ChooseA
         trackRecordingServiceConnection = new TrackRecordingServiceConnection(this, bindChangedCallback);
         trackDataHub = TrackDataHub.newInstance(this);
 
-        tabHost = findViewById(android.R.id.tabhost);
+        tabHost = findViewById(R.id.tackdetail_tabhost);
         tabHost.setup();
 
         ViewPager viewPager = findViewById(R.id.pager);

src/main/res/layout/track_detail.xml

@@ -19,7 +19,7 @@ limitations under the License.
     android:orientation="vertical">
 
     <TabHost
-        android:id="@android:id/tabhost"
+        android:id="@+id/tackdetail_tabhost"
         android:layout_width="match_parent"
         android:layout_height="0dp"
         android:layout_weight="1">