Merge pull request #2868 from mfietz/feature/2849-fix-code-warnings

Feature/2849 fix code warnings

24 files changed, 50 insertions, 58 deletions

diff --git a/core/src/main/java/de/danoeh/antennapod/core/UpdateManager.java b/core/src/main/java/de/danoeh/antennapod/core/UpdateManager.java
index a42d495ac..8ad70c328 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/UpdateManager.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/UpdateManager.java
@@ -10,14 +10,7 @@ import android.util.Log;
 
 import org.antennapod.audio.MediaPlayer;
 
-import java.io.File;
-import java.util.List;
-
-import de.danoeh.antennapod.core.feed.Feed;
-import de.danoeh.antennapod.core.feed.FeedItem;
 import de.danoeh.antennapod.core.preferences.UserPreferences;
-import de.danoeh.antennapod.core.storage.DBReader;
-import de.danoeh.antennapod.core.storage.DBWriter;
 
 /*
  * This class's job is do perform maintenance tasks whenever the app has been updated
diff --git a/core/src/main/java/de/danoeh/antennapod/core/asynctask/FeedRemover.java b/core/src/main/java/de/danoeh/antennapod/core/asynctask/FeedRemover.java
index 74693cf21..4504b2e7f 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/asynctask/FeedRemover.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/asynctask/FeedRemover.java
@@ -2,14 +2,12 @@ package de.danoeh.antennapod.core.asynctask;
 
 import android.app.ProgressDialog;
 import android.content.Context;
-import android.content.Intent;
 import android.os.AsyncTask;
 
 import java.util.concurrent.ExecutionException;
 
 import de.danoeh.antennapod.core.R;
 import de.danoeh.antennapod.core.feed.Feed;
-import de.danoeh.antennapod.core.service.download.DownloadService;
 import de.danoeh.antennapod.core.service.playback.PlaybackService;
 import de.danoeh.antennapod.core.storage.DBWriter;
 import de.danoeh.antennapod.core.util.IntentUtils;
diff --git a/core/src/main/java/de/danoeh/antennapod/core/asynctask/FlattrClickWorker.java b/core/src/main/java/de/danoeh/antennapod/core/asynctask/FlattrClickWorker.java
index f4c99011a..318e404c8 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/asynctask/FlattrClickWorker.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/asynctask/FlattrClickWorker.java
@@ -10,7 +10,6 @@ import android.support.v4.app.NotificationCompat;
 import android.util.Log;
 import android.widget.Toast;
 
-import de.danoeh.antennapod.core.util.gui.NotificationUtils;
 import org.shredzone.flattr4j.exception.FlattrException;
 
 import java.util.LinkedList;
@@ -27,6 +26,7 @@ import de.danoeh.antennapod.core.storage.DBWriter;
 import de.danoeh.antennapod.core.util.NetworkUtils;
 import de.danoeh.antennapod.core.util.flattr.FlattrThing;
 import de.danoeh.antennapod.core.util.flattr.FlattrUtils;
+import de.danoeh.antennapod.core.util.gui.NotificationUtils;
 
 /**
  * Performs a click action in a background thread.
diff --git a/core/src/main/java/de/danoeh/antennapod/core/feed/FeedItem.java b/core/src/main/java/de/danoeh/antennapod/core/feed/FeedItem.java
index f9627b7b2..0f0343f25 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/feed/FeedItem.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/feed/FeedItem.java
@@ -2,9 +2,8 @@ package de.danoeh.antennapod.core.feed;
 
 import android.database.Cursor;
 import android.support.annotation.Nullable;
-
 import android.text.TextUtils;
-import de.danoeh.antennapod.core.asynctask.ImageResource;
+
 import org.apache.commons.lang3.builder.ToStringBuilder;
 import org.apache.commons.lang3.builder.ToStringStyle;
 
@@ -15,6 +14,7 @@ import java.util.Set;
 import java.util.concurrent.Callable;
 import java.util.concurrent.TimeUnit;
 
+import de.danoeh.antennapod.core.asynctask.ImageResource;
 import de.danoeh.antennapod.core.storage.DBReader;
 import de.danoeh.antennapod.core.storage.PodDBAdapter;
 import de.danoeh.antennapod.core.util.ShownotesProvider;
diff --git a/core/src/main/java/de/danoeh/antennapod/core/preferences/UserPreferences.java b/core/src/main/java/de/danoeh/antennapod/core/preferences/UserPreferences.java
index 5eec32ebc..e6b5f9e1b 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/preferences/UserPreferences.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/preferences/UserPreferences.java
@@ -8,14 +8,7 @@ import android.support.annotation.NonNull;
 import android.support.v4.app.NotificationCompat;
 import android.text.TextUtils;
 import android.util.Log;
-import de.danoeh.antennapod.core.R;
-import de.danoeh.antennapod.core.service.download.ProxyConfig;
-import de.danoeh.antennapod.core.storage.APCleanupAlgorithm;
-import de.danoeh.antennapod.core.storage.APNullCleanupAlgorithm;
-import de.danoeh.antennapod.core.storage.APQueueCleanupAlgorithm;
-import de.danoeh.antennapod.core.storage.EpisodeCleanupAlgorithm;
-import de.danoeh.antennapod.core.util.Converter;
-import de.danoeh.antennapod.core.util.download.AutoUpdateManager;
+
 import org.json.JSONArray;
 import org.json.JSONException;
 
@@ -27,6 +20,15 @@ import java.util.Arrays;
 import java.util.List;
 import java.util.concurrent.TimeUnit;
 
+import de.danoeh.antennapod.core.R;
+import de.danoeh.antennapod.core.service.download.ProxyConfig;
+import de.danoeh.antennapod.core.storage.APCleanupAlgorithm;
+import de.danoeh.antennapod.core.storage.APNullCleanupAlgorithm;
+import de.danoeh.antennapod.core.storage.APQueueCleanupAlgorithm;
+import de.danoeh.antennapod.core.storage.EpisodeCleanupAlgorithm;
+import de.danoeh.antennapod.core.util.Converter;
+import de.danoeh.antennapod.core.util.download.AutoUpdateManager;
+
 /**
  * Provides access to preferences set by the user in the settings screen. A
  * private instance of this class must first be instantiated via
diff --git a/core/src/main/java/de/danoeh/antennapod/core/receiver/PlayerWidget.java b/core/src/main/java/de/danoeh/antennapod/core/receiver/PlayerWidget.java
index edc2ea3e0..7663cdbe4 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/receiver/PlayerWidget.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/receiver/PlayerWidget.java
@@ -6,10 +6,11 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.util.Log;
-import de.danoeh.antennapod.core.service.PlayerWidgetJobService;
 
 import java.util.Arrays;
 
+import de.danoeh.antennapod.core.service.PlayerWidgetJobService;
+
 
 public class PlayerWidget extends AppWidgetProvider {
     private static final String TAG = "PlayerWidget";
diff --git a/core/src/main/java/de/danoeh/antennapod/core/service/FeedUpdateJobService.java b/core/src/main/java/de/danoeh/antennapod/core/service/FeedUpdateJobService.java
index 55a8d6b86..7d80d4e7c 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/service/FeedUpdateJobService.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/service/FeedUpdateJobService.java
@@ -5,6 +5,7 @@ import android.app.job.JobService;
 import android.os.Build;
 import android.support.annotation.RequiresApi;
 import android.util.Log;
+
 import de.danoeh.antennapod.core.ClientConfig;
 import de.danoeh.antennapod.core.preferences.UserPreferences;
 import de.danoeh.antennapod.core.util.FeedUpdateUtils;
diff --git a/core/src/main/java/de/danoeh/antennapod/core/service/download/DownloadService.java b/core/src/main/java/de/danoeh/antennapod/core/service/download/DownloadService.java
index 5463365bb..ffbe7e7d1 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/service/download/DownloadService.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/service/download/DownloadService.java
@@ -14,14 +14,13 @@ import android.os.Handler;
 import android.os.IBinder;
 import android.support.annotation.NonNull;
 import android.support.annotation.VisibleForTesting;
+import android.support.annotation.Nullable;
 import android.support.v4.app.NotificationCompat;
 import android.text.TextUtils;
 import android.util.Log;
 import android.util.Pair;
 import android.webkit.URLUtil;
 
-import de.danoeh.antennapod.core.storage.PodDBAdapter;
-import de.danoeh.antennapod.core.util.gui.NotificationUtils;
 import org.apache.commons.io.FileUtils;
 import org.xml.sax.SAXException;
 
@@ -31,10 +30,8 @@ import java.net.HttpURLConnection;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Date;
-import java.util.HashSet;
 import java.util.LinkedList;
 import java.util.List;
-import java.util.Set;
 import java.util.concurrent.BlockingQueue;
 import java.util.concurrent.Callable;
 import java.util.concurrent.CompletionService;
@@ -69,12 +66,14 @@ import de.danoeh.antennapod.core.storage.DBTasks;
 import de.danoeh.antennapod.core.storage.DBWriter;
 import de.danoeh.antennapod.core.storage.DownloadRequestException;
 import de.danoeh.antennapod.core.storage.DownloadRequester;
+import de.danoeh.antennapod.core.storage.PodDBAdapter;
 import de.danoeh.antennapod.core.syndication.handler.FeedHandler;
 import de.danoeh.antennapod.core.syndication.handler.FeedHandlerResult;
 import de.danoeh.antennapod.core.syndication.handler.UnsupportedFeedtypeException;
 import de.danoeh.antennapod.core.util.ChapterUtils;
 import de.danoeh.antennapod.core.util.DownloadError;
 import de.danoeh.antennapod.core.util.InvalidFeedException;
+import de.danoeh.antennapod.core.util.gui.NotificationUtils;
 import de.greenrobot.event.EventBus;
 
 /**
diff --git a/core/src/main/java/de/danoeh/antennapod/core/service/playback/ExoPlayerWrapper.java b/core/src/main/java/de/danoeh/antennapod/core/service/playback/ExoPlayerWrapper.java
index cc9d2ce2d..e1d87e1d5 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/service/playback/ExoPlayerWrapper.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/service/playback/ExoPlayerWrapper.java
@@ -3,6 +3,7 @@ package de.danoeh.antennapod.core.service.playback;
 import android.content.Context;
 import android.net.Uri;
 import android.view.SurfaceHolder;
+
 import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.DefaultLoadControl;
 import com.google.android.exoplayer2.DefaultRenderersFactory;
@@ -22,9 +23,11 @@ import com.google.android.exoplayer2.trackselection.TrackSelectionArray;
 import com.google.android.exoplayer2.upstream.DataSource;
 import com.google.android.exoplayer2.upstream.DefaultDataSourceFactory;
 import com.google.android.exoplayer2.util.Util;
-import de.danoeh.antennapod.core.util.playback.IPlayer;
+
 import org.antennapod.audio.MediaPlayer;
 
+import de.danoeh.antennapod.core.util.playback.IPlayer;
+
 
 public class ExoPlayerWrapper implements IPlayer {
     private final Context mContext;
diff --git a/core/src/main/java/de/danoeh/antennapod/core/service/playback/PlaybackService.java b/core/src/main/java/de/danoeh/antennapod/core/service/playback/PlaybackService.java
index 2d8c38ccf..041f1a809 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/service/playback/PlaybackService.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/service/playback/PlaybackService.java
@@ -24,13 +24,13 @@ import android.os.Vibrator;
 import android.preference.PreferenceManager;
 import android.support.annotation.NonNull;
 import android.support.annotation.StringRes;
+import android.support.v4.app.NotificationCompat;
 import android.support.v4.media.MediaBrowserCompat;
 import android.support.v4.media.MediaBrowserServiceCompat;
 import android.support.v4.media.MediaDescriptionCompat;
 import android.support.v4.media.MediaMetadataCompat;
 import android.support.v4.media.session.MediaSessionCompat;
 import android.support.v4.media.session.PlaybackStateCompat;
-import android.support.v4.app.NotificationCompat;
 import android.text.TextUtils;
 import android.util.Log;
 import android.util.Pair;
@@ -66,8 +66,8 @@ import de.danoeh.antennapod.core.storage.DBWriter;
 import de.danoeh.antennapod.core.storage.FeedSearcher;
 import de.danoeh.antennapod.core.util.IntList;
 import de.danoeh.antennapod.core.util.IntentUtils;
-import de.danoeh.antennapod.core.util.gui.NotificationUtils;
 import de.danoeh.antennapod.core.util.QueueAccess;
+import de.danoeh.antennapod.core.util.gui.NotificationUtils;
 import de.danoeh.antennapod.core.util.playback.ExternalMedia;
 import de.danoeh.antennapod.core.util.playback.Playable;
 import de.greenrobot.event.EventBus;
@@ -1799,7 +1799,7 @@ public class PlaybackService extends MediaBrowserServiceCompat {
         public boolean onMediaButtonEvent(final Intent mediaButton) {
             Log.d(TAG, "onMediaButtonEvent(" + mediaButton + ")");
             if (mediaButton != null) {
-                KeyEvent keyEvent = (KeyEvent) mediaButton.getParcelableExtra(Intent.EXTRA_KEY_EVENT);
+                KeyEvent keyEvent = mediaButton.getParcelableExtra(Intent.EXTRA_KEY_EVENT);
                 if (keyEvent != null &&
                         keyEvent.getAction() == KeyEvent.ACTION_DOWN &&
                         keyEvent.getRepeatCount() == 0) {
diff --git a/core/src/main/java/de/danoeh/antennapod/core/storage/DBTasks.java b/core/src/main/java/de/danoeh/antennapod/core/storage/DBTasks.java
index d00cc30d4..ba7d4b47b 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/storage/DBTasks.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/storage/DBTasks.java
@@ -1,11 +1,9 @@
 package de.danoeh.antennapod.core.storage;
 
 import android.content.Context;
-import android.content.Intent;
 import android.content.SharedPreferences;
 import android.database.Cursor;
 import android.support.annotation.Nullable;
-import android.support.v4.content.ContextCompat;
 import android.util.Log;
 
 import java.util.ArrayList;
diff --git a/core/src/main/java/de/danoeh/antennapod/core/storage/DBUpgrader.java b/core/src/main/java/de/danoeh/antennapod/core/storage/DBUpgrader.java
index 29ed5f7f9..0beb765e7 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/storage/DBUpgrader.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/storage/DBUpgrader.java
@@ -5,6 +5,7 @@ import android.database.Cursor;
 import android.database.sqlite.SQLiteDatabase;
 import android.media.MediaMetadataRetriever;
 import android.util.Log;
+
 import de.danoeh.antennapod.core.feed.FeedItem;
 
 class DBUpgrader {
diff --git a/core/src/main/java/de/danoeh/antennapod/core/storage/DBWriter.java b/core/src/main/java/de/danoeh/antennapod/core/storage/DBWriter.java
index 8bb5bc31a..bbe6145ea 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/storage/DBWriter.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/storage/DBWriter.java
@@ -7,7 +7,6 @@ import android.content.SharedPreferences;
 import android.preference.PreferenceManager;
 import android.util.Log;
 
-import de.danoeh.antennapod.core.util.IntentUtils;
 import org.shredzone.flattr4j.model.Flattr;
 
 import java.io.File;
@@ -42,6 +41,7 @@ import de.danoeh.antennapod.core.preferences.PlaybackPreferences;
 import de.danoeh.antennapod.core.preferences.UserPreferences;
 import de.danoeh.antennapod.core.service.download.DownloadStatus;
 import de.danoeh.antennapod.core.service.playback.PlaybackService;
+import de.danoeh.antennapod.core.util.IntentUtils;
 import de.danoeh.antennapod.core.util.LongList;
 import de.danoeh.antennapod.core.util.Permutor;
 import de.danoeh.antennapod.core.util.flattr.FlattrStatus;
diff --git a/core/src/main/java/de/danoeh/antennapod/core/storage/DownloadRequester.java b/core/src/main/java/de/danoeh/antennapod/core/storage/DownloadRequester.java
index 827874f54..892a4675a 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/storage/DownloadRequester.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/storage/DownloadRequester.java
@@ -9,8 +9,6 @@ import android.text.TextUtils;
 import android.util.Log;
 import android.webkit.URLUtil;
 
-import de.danoeh.antennapod.core.service.playback.PlaybackService;
-import de.danoeh.antennapod.core.util.IntentUtils;
 import org.apache.commons.io.FilenameUtils;
 
 import java.io.File;
@@ -25,6 +23,7 @@ import de.danoeh.antennapod.core.preferences.UserPreferences;
 import de.danoeh.antennapod.core.service.download.DownloadRequest;
 import de.danoeh.antennapod.core.service.download.DownloadService;
 import de.danoeh.antennapod.core.util.FileNameGenerator;
+import de.danoeh.antennapod.core.util.IntentUtils;
 import de.danoeh.antennapod.core.util.URLChecker;
 
 
diff --git a/core/src/main/java/de/danoeh/antennapod/core/storage/PodDBAdapter.java b/core/src/main/java/de/danoeh/antennapod/core/storage/PodDBAdapter.java
index 51b41d3b3..8ebd8eeb5 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/storage/PodDBAdapter.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/storage/PodDBAdapter.java
@@ -12,8 +12,20 @@ import android.database.sqlite.SQLiteDatabase;
 import android.database.sqlite.SQLiteDatabase.CursorFactory;
 import android.database.sqlite.SQLiteOpenHelper;
 import android.media.MediaMetadataRetriever;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
 import android.text.TextUtils;
 import android.util.Log;
+
+import org.apache.commons.io.FileUtils;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.Set;
+
 import de.danoeh.antennapod.core.R;
 import de.danoeh.antennapod.core.event.ProgressEvent;
 import de.danoeh.antennapod.core.feed.Chapter;
@@ -26,14 +38,6 @@ import de.danoeh.antennapod.core.service.download.DownloadStatus;
 import de.danoeh.antennapod.core.util.LongIntMap;
 import de.danoeh.antennapod.core.util.flattr.FlattrStatus;
 import de.greenrobot.event.EventBus;
-import org.apache.commons.io.FileUtils;
-
-import java.io.File;
-import java.io.IOException;
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.List;
-import java.util.Set;
 
 // TODO Remove media column from feeditem table
 
diff --git a/core/src/main/java/de/danoeh/antennapod/core/syndication/namespace/NSRSS20.java b/core/src/main/java/de/danoeh/antennapod/core/syndication/namespace/NSRSS20.java
index 795e9db77..e391af1b2 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/syndication/namespace/NSRSS20.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/syndication/namespace/NSRSS20.java
@@ -5,7 +5,6 @@ import android.util.Log;
 
 import org.xml.sax.Attributes;
 
-import de.danoeh.antennapod.core.feed.Feed;
 import de.danoeh.antennapod.core.feed.FeedItem;
 import de.danoeh.antennapod.core.feed.FeedMedia;
 import de.danoeh.antennapod.core.syndication.handler.HandlerState;
diff --git a/core/src/main/java/de/danoeh/antennapod/core/util/NetworkUtils.java b/core/src/main/java/de/danoeh/antennapod/core/util/NetworkUtils.java
index 49709bb53..0120790ed 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/util/NetworkUtils.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/util/NetworkUtils.java
@@ -22,7 +22,6 @@ import okhttp3.OkHttpClient;
 import okhttp3.Request;
 import okhttp3.Response;
 import rx.Observable;
-import rx.Subscriber;
 import rx.android.schedulers.AndroidSchedulers;
 import rx.schedulers.Schedulers;
 
diff --git a/core/src/main/java/de/danoeh/antennapod/core/util/ThemeUtils.java b/core/src/main/java/de/danoeh/antennapod/core/util/ThemeUtils.java
index 031eaed49..14f091249 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/util/ThemeUtils.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/util/ThemeUtils.java
@@ -3,10 +3,9 @@ package de.danoeh.antennapod.core.util;
 import android.content.Context;
 import android.support.annotation.AttrRes;
 import android.support.annotation.ColorInt;
-import android.support.annotation.ColorRes;
 import android.util.Log;
-
 import android.util.TypedValue;
+
 import de.danoeh.antennapod.core.R;
 import de.danoeh.antennapod.core.preferences.UserPreferences;
 
diff --git a/core/src/main/java/de/danoeh/antennapod/core/util/download/AutoUpdateManager.java b/core/src/main/java/de/danoeh/antennapod/core/util/download/AutoUpdateManager.java
index ad723c685..3a2a4ac80 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/util/download/AutoUpdateManager.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/util/download/AutoUpdateManager.java
@@ -11,12 +11,13 @@ import android.os.Build;
 import android.os.SystemClock;
 import android.support.annotation.RequiresApi;
 import android.util.Log;
-import de.danoeh.antennapod.core.receiver.FeedUpdateReceiver;
-import de.danoeh.antennapod.core.service.FeedUpdateJobService;
 
 import java.util.Calendar;
 import java.util.concurrent.TimeUnit;
 
+import de.danoeh.antennapod.core.receiver.FeedUpdateReceiver;
+import de.danoeh.antennapod.core.service.FeedUpdateJobService;
+
 public class AutoUpdateManager {
     private static final int JOB_ID_FEED_UPDATE = 42;
     private static final String TAG = "AutoUpdateManager";
diff --git a/core/src/main/java/de/danoeh/antennapod/core/util/flattr/FlattrUtils.java b/core/src/main/java/de/danoeh/antennapod/core/util/flattr/FlattrUtils.java
index dfb5484cd..919fc82f2 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/util/flattr/FlattrUtils.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/util/flattr/FlattrUtils.java
@@ -1,8 +1,6 @@
 package de.danoeh.antennapod.core.util.flattr;
 
 import android.content.Context;
-import android.content.DialogInterface;
-import android.content.DialogInterface.OnClickListener;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.net.Uri;
diff --git a/core/src/main/java/de/danoeh/antennapod/core/util/gui/MoreContentListFooterUtil.java b/core/src/main/java/de/danoeh/antennapod/core/util/gui/MoreContentListFooterUtil.java
index 386f46724..6e5c3e84b 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/util/gui/MoreContentListFooterUtil.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/util/gui/MoreContentListFooterUtil.java
@@ -27,8 +27,8 @@ public class MoreContentListFooterUtil {
     }
 
     public void setLoadingState(boolean newState) {
-        final ImageView imageView = (ImageView) root.findViewById(R.id.imgExpand);
-        final ProgressBar progressBar = (ProgressBar) root.findViewById(R.id.progBar);
+        final ImageView imageView = root.findViewById(R.id.imgExpand);
+        final ProgressBar progressBar = root.findViewById(R.id.progBar);
         if (newState) {
             imageView.setVisibility(View.GONE);
             progressBar.setVisibility(View.VISIBLE);
diff --git a/core/src/main/java/de/danoeh/antennapod/core/util/gui/NotificationUtils.java b/core/src/main/java/de/danoeh/antennapod/core/util/gui/NotificationUtils.java
index 2a537dc62..52a43aab2 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/util/gui/NotificationUtils.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/util/gui/NotificationUtils.java
@@ -6,6 +6,7 @@ import android.app.NotificationManager;
 import android.content.Context;
 import android.os.Build;
 import android.support.annotation.RequiresApi;
+
 import de.danoeh.antennapod.core.R;
 
 public class NotificationUtils {
diff --git a/core/src/main/java/de/danoeh/antennapod/core/util/playback/PlaybackController.java b/core/src/main/java/de/danoeh/antennapod/core/util/playback/PlaybackController.java
index 7680a87fb..408789cc9 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/util/playback/PlaybackController.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/util/playback/PlaybackController.java
@@ -7,12 +7,10 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.content.ServiceConnection;
-import android.content.SharedPreferences;
 import android.content.res.TypedArray;
 import android.media.MediaPlayer;
 import android.os.Build;
 import android.os.IBinder;
-import android.preference.PreferenceManager;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 import android.support.v4.content.ContextCompat;
@@ -24,10 +22,8 @@ import android.widget.ImageButton;
 import android.widget.SeekBar;
 import android.widget.TextView;
 
-import java.util.concurrent.RejectedExecutionHandler;
 import java.util.concurrent.ScheduledFuture;
 import java.util.concurrent.ScheduledThreadPoolExecutor;
-import java.util.concurrent.ThreadPoolExecutor;
 import java.util.concurrent.TimeUnit;
 
 import de.danoeh.antennapod.core.R;
@@ -42,12 +38,10 @@ import de.danoeh.antennapod.core.service.playback.PlayerStatus;
 import de.danoeh.antennapod.core.storage.DBTasks;
 import de.danoeh.antennapod.core.util.Converter;
 import de.danoeh.antennapod.core.util.playback.Playable.PlayableUtils;
-import rx.Completable;
 import rx.Observable;
 import rx.Single;
 import rx.Subscription;
 import rx.android.schedulers.AndroidSchedulers;
-import rx.observers.Subscribers;
 import rx.schedulers.Schedulers;
 
 /**
diff --git a/core/src/main/java/de/danoeh/antennapod/core/util/playback/PlaybackServiceStarter.java b/core/src/main/java/de/danoeh/antennapod/core/util/playback/PlaybackServiceStarter.java
index 3ba553d12..f7d2ee409 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/util/playback/PlaybackServiceStarter.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/util/playback/PlaybackServiceStarter.java
@@ -3,7 +3,9 @@ package de.danoeh.antennapod.core.util.playback;
 import android.content.Context;
 import android.content.Intent;
 import android.media.MediaPlayer;
+import android.support.annotation.NonNull;
 import android.support.v4.content.ContextCompat;
+
 import de.danoeh.antennapod.core.preferences.PlaybackPreferences;
 import de.danoeh.antennapod.core.service.playback.PlaybackService;