diff --git a/libs/MemorizingTrustManager/src/de/duenndns/ssl/MemorizingTrustManager.java b/libs/MemorizingTrustManager/src/de/duenndns/ssl/MemorizingTrustManager.java
index a45ab05ba79fc27e4df06ab2f0e3eb74c99f35c4..014790280f039ffced76fca974fd7a28cb06024a 100644
--- a/libs/MemorizingTrustManager/src/de/duenndns/ssl/MemorizingTrustManager.java
+++ b/libs/MemorizingTrustManager/src/de/duenndns/ssl/MemorizingTrustManager.java
@@ -28,14 +28,11 @@ package de.duenndns.ssl;
 
 import android.app.Activity;
 import android.app.Application;
-import android.app.Notification;
 import android.app.NotificationManager;
 import android.app.Service;
-import android.app.PendingIntent;
 import android.content.Context;
 import android.content.Intent;
 import android.net.Uri;
-import android.os.SystemClock;
 import android.preference.PreferenceManager;
 import android.util.Base64;
 import android.util.Log;
@@ -54,7 +51,6 @@ import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
-import java.net.MalformedURLException;
 import java.net.URL;
 import java.security.NoSuchAlgorithmException;
 import java.security.cert.*;
diff --git a/src/main/java/eu/siacs/conversations/crypto/axolotl/SQLiteAxolotlStore.java b/src/main/java/eu/siacs/conversations/crypto/axolotl/SQLiteAxolotlStore.java
index 13858b74a7fc76dacd33ff350ab5a9d70d98b5ee..d55ebb52b45a60a8d26375c5deb5c69d81c838b8 100644
--- a/src/main/java/eu/siacs/conversations/crypto/axolotl/SQLiteAxolotlStore.java
+++ b/src/main/java/eu/siacs/conversations/crypto/axolotl/SQLiteAxolotlStore.java
@@ -21,10 +21,7 @@ import java.util.Set;
 
 import eu.siacs.conversations.Config;
 import eu.siacs.conversations.entities.Account;
-import eu.siacs.conversations.entities.Contact;
 import eu.siacs.conversations.services.XmppConnectionService;
-import eu.siacs.conversations.xmpp.jid.InvalidJidException;
-import eu.siacs.conversations.xmpp.jid.Jid;
 
 public class SQLiteAxolotlStore implements AxolotlStore {
 
diff --git a/src/main/java/eu/siacs/conversations/crypto/axolotl/XmppAxolotlSession.java b/src/main/java/eu/siacs/conversations/crypto/axolotl/XmppAxolotlSession.java
index 359cb7fdd53ef0ffc0542d0a4288de767cf3a456..e90b7e90720976dc027fef60c4006e1803dbb154 100644
--- a/src/main/java/eu/siacs/conversations/crypto/axolotl/XmppAxolotlSession.java
+++ b/src/main/java/eu/siacs/conversations/crypto/axolotl/XmppAxolotlSession.java
@@ -2,9 +2,7 @@ package eu.siacs.conversations.crypto.axolotl;
 
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
-import android.util.Log;
 
-import org.bouncycastle.math.ec.PreCompInfo;
 import org.whispersystems.libaxolotl.AxolotlAddress;
 import org.whispersystems.libaxolotl.DuplicateMessageException;
 import org.whispersystems.libaxolotl.IdentityKey;
@@ -21,9 +19,7 @@ import org.whispersystems.libaxolotl.protocol.PreKeyWhisperMessage;
 import org.whispersystems.libaxolotl.protocol.WhisperMessage;
 import org.whispersystems.libaxolotl.util.guava.Optional;
 
-import eu.siacs.conversations.Config;
 import eu.siacs.conversations.entities.Account;
-import eu.siacs.conversations.utils.CryptoHelper;
 
 public class XmppAxolotlSession implements Comparable<XmppAxolotlSession> {
 	private final SessionCipher cipher;
diff --git a/src/main/java/eu/siacs/conversations/entities/Bookmark.java b/src/main/java/eu/siacs/conversations/entities/Bookmark.java
index 91e34116db291b47a79c800ab38dfd3c731735d9..e6aeadf4a503b02f1f6872572f5ee55d71a9132d 100644
--- a/src/main/java/eu/siacs/conversations/entities/Bookmark.java
+++ b/src/main/java/eu/siacs/conversations/entities/Bookmark.java
@@ -6,7 +6,6 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.Locale;
 
-import eu.siacs.conversations.Config;
 import eu.siacs.conversations.utils.UIHelper;
 import eu.siacs.conversations.xml.Element;
 import eu.siacs.conversations.xmpp.jid.Jid;
diff --git a/src/main/java/eu/siacs/conversations/http/HttpConnectionManager.java b/src/main/java/eu/siacs/conversations/http/HttpConnectionManager.java
index cd0f299cb2b1ef67aa9638f722894238e7e06031..7e44cef715d3dfabee6ca68d451302f1cb5e1326 100644
--- a/src/main/java/eu/siacs/conversations/http/HttpConnectionManager.java
+++ b/src/main/java/eu/siacs/conversations/http/HttpConnectionManager.java
@@ -1,7 +1,5 @@
 package eu.siacs.conversations.http;
 
-import android.os.Build;
-
 import org.apache.http.conn.ssl.StrictHostnameVerifier;
 
 import java.io.IOException;
@@ -15,15 +13,12 @@ import java.util.concurrent.CopyOnWriteArrayList;
 
 import javax.net.ssl.HostnameVerifier;
 import javax.net.ssl.HttpsURLConnection;
-import javax.net.ssl.SSLContext;
 import javax.net.ssl.SSLSocketFactory;
 import javax.net.ssl.X509TrustManager;
 
 import eu.siacs.conversations.entities.Message;
 import eu.siacs.conversations.services.AbstractConnectionManager;
 import eu.siacs.conversations.services.XmppConnectionService;
-import eu.siacs.conversations.utils.CryptoHelper;
-import eu.siacs.conversations.utils.SSLSocketHelper;
 import eu.siacs.conversations.utils.TLSSocketFactory;
 
 public class HttpConnectionManager extends AbstractConnectionManager {
diff --git a/src/main/java/eu/siacs/conversations/http/HttpUploadConnection.java b/src/main/java/eu/siacs/conversations/http/HttpUploadConnection.java
index a5301af3341dfd94b5d1336ddaf5744c65e0621f..8884330e6f45bdae210a909ec8d2f330f4260aa0 100644
--- a/src/main/java/eu/siacs/conversations/http/HttpUploadConnection.java
+++ b/src/main/java/eu/siacs/conversations/http/HttpUploadConnection.java
@@ -1,6 +1,5 @@
 package eu.siacs.conversations.http;
 
-import android.app.PendingIntent;
 import android.os.PowerManager;
 import android.util.Log;
 import android.util.Pair;
@@ -24,7 +23,6 @@ import eu.siacs.conversations.parser.IqParser;
 import eu.siacs.conversations.persistance.FileBackend;
 import eu.siacs.conversations.services.AbstractConnectionManager;
 import eu.siacs.conversations.services.XmppConnectionService;
-import eu.siacs.conversations.ui.UiCallback;
 import eu.siacs.conversations.utils.CryptoHelper;
 import eu.siacs.conversations.xml.Namespace;
 import eu.siacs.conversations.xml.Element;
diff --git a/src/main/java/eu/siacs/conversations/parser/IqParser.java b/src/main/java/eu/siacs/conversations/parser/IqParser.java
index 4fab423badbab2f91969f1120b2f890d5c7c5c84..a826f8b1c40d8dc077a65b4094877ef19d02ec96 100644
--- a/src/main/java/eu/siacs/conversations/parser/IqParser.java
+++ b/src/main/java/eu/siacs/conversations/parser/IqParser.java
@@ -26,7 +26,6 @@ import eu.siacs.conversations.Config;
 import eu.siacs.conversations.crypto.axolotl.AxolotlService;
 import eu.siacs.conversations.entities.Account;
 import eu.siacs.conversations.entities.Contact;
-import eu.siacs.conversations.entities.Conversation;
 import eu.siacs.conversations.services.XmppConnectionService;
 import eu.siacs.conversations.xml.Namespace;
 import eu.siacs.conversations.xml.Element;
diff --git a/src/main/java/eu/siacs/conversations/services/ContactChooserTargetService.java b/src/main/java/eu/siacs/conversations/services/ContactChooserTargetService.java
index 0a8ac98ca8c143c59f4e1bcda0d2ee5a0d4bd695..edc661b79ad97c1d73501bea11eeabc514ba6ea5 100644
--- a/src/main/java/eu/siacs/conversations/services/ContactChooserTargetService.java
+++ b/src/main/java/eu/siacs/conversations/services/ContactChooserTargetService.java
@@ -1,7 +1,6 @@
 package eu.siacs.conversations.services;
 
 import android.annotation.TargetApi;
-import android.app.PendingIntent;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
@@ -11,11 +10,8 @@ import android.graphics.drawable.Icon;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.IBinder;
-import android.os.SystemClock;
 import android.service.chooser.ChooserTarget;
 import android.service.chooser.ChooserTargetService;
-import android.util.DisplayMetrics;
-import android.util.Log;
 
 import java.util.ArrayList;
 import java.util.List;
diff --git a/src/main/java/eu/siacs/conversations/services/EventReceiver.java b/src/main/java/eu/siacs/conversations/services/EventReceiver.java
index 9b73035ca233c6a202d4479ffaa9d956977396fb..a50e4b5a98c72be6a607d40c3e7b041c95b64a5c 100644
--- a/src/main/java/eu/siacs/conversations/services/EventReceiver.java
+++ b/src/main/java/eu/siacs/conversations/services/EventReceiver.java
@@ -3,9 +3,7 @@ package eu.siacs.conversations.services;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
-import android.net.ConnectivityManager;
 
-import eu.siacs.conversations.Config;
 import eu.siacs.conversations.persistance.DatabaseBackend;
 
 public class EventReceiver extends BroadcastReceiver {
diff --git a/src/main/java/eu/siacs/conversations/services/NotificationService.java b/src/main/java/eu/siacs/conversations/services/NotificationService.java
index b8271e7d270a92132287a07f6f8d2e36c3a2261c..f4d4b17d0fff757e73e2e2855aea13113d6940b2 100644
--- a/src/main/java/eu/siacs/conversations/services/NotificationService.java
+++ b/src/main/java/eu/siacs/conversations/services/NotificationService.java
@@ -15,7 +15,6 @@ import android.support.v4.app.NotificationCompat.Builder;
 import android.support.v4.app.NotificationManagerCompat;
 import android.support.v4.app.RemoteInput;
 import android.support.v4.content.ContextCompat;
-import android.text.Html;
 import android.text.SpannableString;
 import android.text.style.StyleSpan;
 import android.util.DisplayMetrics;
diff --git a/src/main/java/eu/siacs/conversations/ui/ConversationActivity.java b/src/main/java/eu/siacs/conversations/ui/ConversationActivity.java
index 6384ad12257e77fbadbef8a797e85ddfc3543df8..d6dff80efdef8ce24ee819d6629043dd32f9a712 100644
--- a/src/main/java/eu/siacs/conversations/ui/ConversationActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/ConversationActivity.java
@@ -40,8 +40,6 @@ import net.java.otr4j.session.SessionStatus;
 
 import org.openintents.openpgp.util.OpenPgpApi;
 
-import java.lang.reflect.Field;
-import java.lang.reflect.Method;
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
@@ -52,7 +50,6 @@ import eu.siacs.conversations.Config;
 import eu.siacs.conversations.R;
 import eu.siacs.conversations.crypto.axolotl.AxolotlService;
 import eu.siacs.conversations.crypto.axolotl.FingerprintStatus;
-import eu.siacs.conversations.crypto.axolotl.XmppAxolotlSession;
 import eu.siacs.conversations.entities.Account;
 import eu.siacs.conversations.entities.Blockable;
 import eu.siacs.conversations.entities.Contact;
diff --git a/src/main/java/eu/siacs/conversations/ui/ConversationFragment.java b/src/main/java/eu/siacs/conversations/ui/ConversationFragment.java
index 8845dd9e20ef4782cdb3b7f984991f777286d655..75fab618d98259dcd6119357a9b625af96571650 100644
--- a/src/main/java/eu/siacs/conversations/ui/ConversationFragment.java
+++ b/src/main/java/eu/siacs/conversations/ui/ConversationFragment.java
@@ -45,9 +45,7 @@ import net.java.otr4j.session.SessionStatus;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
-import java.util.HashSet;
 import java.util.List;
-import java.util.Set;
 import java.util.UUID;
 import java.util.concurrent.atomic.AtomicBoolean;
 
diff --git a/src/main/java/eu/siacs/conversations/ui/WelcomeActivity.java b/src/main/java/eu/siacs/conversations/ui/WelcomeActivity.java
index 2c9fc131c59fae0724e77ec6b4730010f5b9666c..1ef05d2417b92868b1643111580cf9ddb0fc30c7 100644
--- a/src/main/java/eu/siacs/conversations/ui/WelcomeActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/WelcomeActivity.java
@@ -1,7 +1,6 @@
 package eu.siacs.conversations.ui;
 
 import android.app.ActionBar;
-import android.app.Activity;
 import android.content.Intent;
 import android.content.pm.ActivityInfo;
 import android.os.Bundle;
diff --git a/src/main/java/eu/siacs/conversations/ui/adapter/ListItemAdapter.java b/src/main/java/eu/siacs/conversations/ui/adapter/ListItemAdapter.java
index 655d52b46756714e6f23863d47e8391efa01a6d6..89775e1376fd7347a8ca5ad766b24a5ae69bd0a5 100644
--- a/src/main/java/eu/siacs/conversations/ui/adapter/ListItemAdapter.java
+++ b/src/main/java/eu/siacs/conversations/ui/adapter/ListItemAdapter.java
@@ -13,7 +13,6 @@ import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ArrayAdapter;
 import android.widget.ImageView;
-import android.widget.LinearLayout;
 import android.widget.TextView;
 
 import com.wefika.flowlayout.FlowLayout;
@@ -26,7 +25,6 @@ import eu.siacs.conversations.R;
 import eu.siacs.conversations.entities.ListItem;
 import eu.siacs.conversations.ui.XmppActivity;
 import eu.siacs.conversations.utils.UIHelper;
-import eu.siacs.conversations.xmpp.jid.Jid;
 
 public class ListItemAdapter extends ArrayAdapter<ListItem> {
 
diff --git a/src/main/java/eu/siacs/conversations/ui/forms/FormFieldWrapper.java b/src/main/java/eu/siacs/conversations/ui/forms/FormFieldWrapper.java
index 95fcc65493a0bdb210575a9bba3840deff3491d2..5d842a6b32eaed87c9b77f9e12917a45f94264af 100644
--- a/src/main/java/eu/siacs/conversations/ui/forms/FormFieldWrapper.java
+++ b/src/main/java/eu/siacs/conversations/ui/forms/FormFieldWrapper.java
@@ -5,13 +5,11 @@ import android.support.v4.content.ContextCompat;
 import android.text.SpannableString;
 import android.text.style.ForegroundColorSpan;
 import android.text.style.StyleSpan;
-import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 
 import java.util.List;
 
-import eu.siacs.conversations.Config;
 import eu.siacs.conversations.R;
 import eu.siacs.conversations.xmpp.forms.Field;
 
diff --git a/src/main/java/eu/siacs/conversations/utils/ExceptionHandler.java b/src/main/java/eu/siacs/conversations/utils/ExceptionHandler.java
index efc83bcb2a462891bfa245cfa3c98f4cded82526..b8a0fa511c3187273ed54785c8aeace171b249c8 100644
--- a/src/main/java/eu/siacs/conversations/utils/ExceptionHandler.java
+++ b/src/main/java/eu/siacs/conversations/utils/ExceptionHandler.java
@@ -2,9 +2,6 @@ package eu.siacs.conversations.utils;
 
 import android.content.Context;
 
-import java.io.FileNotFoundException;
-import java.io.IOException;
-import java.io.OutputStream;
 import java.io.PrintWriter;
 import java.io.StringWriter;
 import java.io.Writer;
diff --git a/src/main/java/eu/siacs/conversations/utils/ExceptionHelper.java b/src/main/java/eu/siacs/conversations/utils/ExceptionHelper.java
index 962613fb6ee4afce10331da69c7e74f7be43d4ea..46405fd909c2e1f4c6fae7b87eb9baa3b69aad83 100644
--- a/src/main/java/eu/siacs/conversations/utils/ExceptionHelper.java
+++ b/src/main/java/eu/siacs/conversations/utils/ExceptionHelper.java
@@ -7,15 +7,12 @@ import android.content.DialogInterface.OnClickListener;
 import android.content.SharedPreferences;
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
-import android.content.pm.PackageManager.NameNotFoundException;
 import android.content.pm.Signature;
 import android.preference.PreferenceManager;
-import android.text.format.DateUtils;
 import android.util.Log;
 
 import java.io.BufferedReader;
 import java.io.FileInputStream;
-import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.io.OutputStream;
diff --git a/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleSocks5Transport.java b/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleSocks5Transport.java
index b46f345eee3cfb3667a640f5a2f4b6b4bfbb124a..140f20b914c30879f1c467c42f618f9b40c1be43 100644
--- a/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleSocks5Transport.java
+++ b/src/main/java/eu/siacs/conversations/xmpp/jingle/JingleSocks5Transport.java
@@ -3,19 +3,14 @@ package eu.siacs.conversations.xmpp.jingle;
 import android.os.PowerManager;
 import android.util.Log;
 
-import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
-import java.net.InetAddress;
 import java.net.InetSocketAddress;
-import java.net.Proxy;
 import java.net.Socket;
 import java.net.SocketAddress;
-import java.net.UnknownHostException;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
-import java.util.Arrays;
 
 import eu.siacs.conversations.Config;
 import eu.siacs.conversations.entities.DownloadableFile;