TrackDelete: hide progress bar before finishing and add custom animations.

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

@@ -77,6 +77,7 @@ public abstract class AbstractListActivity extends AbstractActivity implements C
         Intent intent = IntentUtils.newIntent(this, TrackDeleteActivity.class);
         intent.putExtra(TrackDeleteActivity.EXTRA_TRACK_IDS, trackIds);
         startActivityForResult(intent, DELETE_REQUEST_CODE);
+        overridePendingTransition(android.R.anim.fade_in, android.R.anim.fade_out);
     }
 
     /**

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

@@ -19,6 +19,7 @@ package de.dennisguse.opentracks;
 import android.content.Intent;
 import android.os.AsyncTask;
 import android.os.Bundle;
+import android.view.View;
 
 import de.dennisguse.opentracks.content.provider.ContentProviderUtils;
 
@@ -65,6 +66,7 @@ public class TrackDeleteActivity extends AbstractActivity {
     }
 
     public void onAsyncTaskCompleted() {
+        findViewById(R.id.progressbar).setVisibility(View.INVISIBLE);
         setResult(RESULT_OK);
         finish();
     }

src/main/res/layout/track_delete.xml

@@ -4,6 +4,7 @@
     android:layout_height="match_parent">
 
     <ProgressBar
+        android:id="@+id/progressbar"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:minHeight="100dp"