Track deletion UI: code cleanup.

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

@@ -62,17 +62,15 @@ public abstract class AbstractListActivity extends AbstractActivity implements C
     @Override
     public void onConfirmDeleteDone(long[] trackIds) {
         boolean stopRecording = false;
-        if (trackIds.length == 1 && trackIds[0] == -1L) {
-            stopRecording = true;
-        } else {
-            long recordingTrackId = PreferencesUtils.getRecordingTrackId(this);
-            for (long trackId : trackIds) {
-                if (trackId == recordingTrackId) {
-                    stopRecording = true;
-                    break;
-                }
+
+        long recordingTrackId = PreferencesUtils.getRecordingTrackId(this);
+        for (long trackId : trackIds) {
+            if (trackId == recordingTrackId) {
+                stopRecording = true;
+                break;
             }
         }
+
         if (stopRecording) {
             getTrackRecordingServiceConnection().stopRecording(this, false);
         }

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

@@ -1,87 +0,0 @@
-package de.dennisguse.opentracks;
-
-/*
- * Copyright 2013 Google Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); you may not
- * use this file except in compliance with the License. You may obtain a copy of
- * the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations under
- * the License.
- */
-
-import android.content.Context;
-import android.os.AsyncTask;
-
-import de.dennisguse.opentracks.content.provider.ContentProviderUtils;
-
-/**
- * Async Task to delete tracks.
- *
- * @author Jimmy Shih
- */
-class DeleteAsyncTask extends AsyncTask<Void, Integer, Boolean> {
-
-    private final long[] trackIds;
-    private final Context context;
-    private TrackDeleteActivity deleteActivity;
-    // true if the AsyncTask has completed
-    private boolean completed;
-
-    /**
-     * Creates an AsyncTask.
-     *
-     * @param deleteActivity the activity currently associated with this task
-     * @param trackIds       the track ids to delete. To delete all, set to size 1 with
-     *                       trackIds[0] == -1L
-     */
-    public DeleteAsyncTask(TrackDeleteActivity deleteActivity, long[] trackIds) {
-        this.deleteActivity = deleteActivity;
-        this.trackIds = trackIds;
-        context = deleteActivity.getApplicationContext();
-        completed = false;
-    }
-
-    /**
-     * Sets the current activity associated with this AyncTask.
-     *
-     * @param deleteActivity the current activity, can be null
-     */
-    public void setActivity(TrackDeleteActivity deleteActivity) {
-        this.deleteActivity = deleteActivity;
-        if (completed && deleteActivity != null) {
-            deleteActivity.onAsyncTaskCompleted();
-        }
-    }
-
-    @Override
-    protected Boolean doInBackground(Void... params) {
-        ContentProviderUtils contentProviderUtils = new ContentProviderUtils(context);
-
-        if (trackIds.length == 1 && trackIds[0] == -1L) {
-            contentProviderUtils.deleteAllTracks(context);
-        } else {
-            for (long id : trackIds) {
-                if (isCancelled()) {
-                    return false;
-                }
-                contentProviderUtils.deleteTrack(context, id);
-            }
-        }
-        return true;
-    }
-
-    @Override
-    protected void onPostExecute(Boolean result) {
-        completed = true;
-        if (deleteActivity != null) {
-            deleteActivity.onAsyncTaskCompleted();
-        }
-    }
-}

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

@@ -16,40 +16,41 @@
 
 package de.dennisguse.opentracks;
 
-import android.app.Activity;
 import android.content.Intent;
+import android.os.AsyncTask;
 import android.os.Bundle;
 
+import de.dennisguse.opentracks.content.provider.ContentProviderUtils;
+
 /**
  * An activity for deleting tracks.
  *
  * @author Jimmy Shih
  */
-public class TrackDeleteActivity extends Activity {
+public class TrackDeleteActivity extends AbstractActivity {
 
     public static final String EXTRA_TRACK_IDS = "track_ids";
 
+    private long[] trackIds;
+
     private DeleteAsyncTask deleteAsyncTask;
 
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
-        setContentView(R.layout.track_delete);
-
         setResult(RESULT_CANCELED);
 
         Intent intent = getIntent();
-        long[] trackIds = intent.getLongArrayExtra(EXTRA_TRACK_IDS);
+        trackIds = intent.getLongArrayExtra(EXTRA_TRACK_IDS);
 
-        Object retained = getLastNonConfigurationInstance();
-        if (retained instanceof DeleteAsyncTask) {
-            deleteAsyncTask = (DeleteAsyncTask) retained;
-            deleteAsyncTask.setActivity(this);
-        } else {
-            deleteAsyncTask = new DeleteAsyncTask(this, trackIds);
-            deleteAsyncTask.execute();
-        }
+        deleteAsyncTask = new DeleteAsyncTask();
+    }
+
+    @Override
+    protected void onStart() {
+        super.onStart();
+        deleteAsyncTask.execute();
     }
 
     @Override
@@ -59,13 +60,34 @@ public class TrackDeleteActivity extends Activity {
     }
 
     @Override
-    public Object onRetainNonConfigurationInstance() {
-        deleteAsyncTask.setActivity(null);
-        return deleteAsyncTask;
+    protected int getLayoutResId() {
+        return R.layout.track_delete;
     }
 
     public void onAsyncTaskCompleted() {
         setResult(RESULT_OK);
         finish();
     }
+
+    class DeleteAsyncTask extends AsyncTask<Void, Integer, Boolean> {
+
+        @Override
+        protected Boolean doInBackground(Void... params) {
+            ContentProviderUtils contentProviderUtils = new ContentProviderUtils(TrackDeleteActivity.this);
+
+            for (long id : trackIds) {
+                if (isCancelled()) {
+                    return false;
+                }
+                contentProviderUtils.deleteTrack(TrackDeleteActivity.this, id);
+            }
+
+            return true;
+        }
+
+        @Override
+        protected void onPostExecute(Boolean result) {
+            TrackDeleteActivity.this.onAsyncTaskCompleted();
+        }
+    }
 }

src/main/java/de/dennisguse/opentracks/content/provider/ContentProviderUtils.java

@@ -165,9 +165,7 @@ public class ContentProviderUtils {
         return track;
     }
 
-    /**
-     * Deletes all tracks (including waypoints and trackPoints).
-     */
+    @VisibleForTesting
     public void deleteAllTracks(Context context) {
         contentResolver.delete(TrackPointsColumns.CONTENT_URI_BY_ID, null, null);
         contentResolver.delete(WaypointsColumns.CONTENT_URI, null, null);