3 files changed, 10 insertions, 2 deletions
diff --git a/app/build.gradle b/app/build.gradle
index 7ee4c6ca2..9a3f57caa 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -170,3 +170,11 @@ task copyTextFiles(type: Copy) {
 }
 
 preBuild.dependsOn filterAbout, copyTextFiles
+
+allprojects {
+    gradle.projectsEvaluated {
+        tasks.withType(JavaCompile) {
+            options.compilerArgs << "-Xlint" << "-Xlint:-deprecation" << "-Xlint:-serial"
+        }
+    }
+}
diff --git a/app/src/main/java/de/danoeh/antennapod/adapter/CoverTarget.java b/app/src/main/java/de/danoeh/antennapod/adapter/CoverTarget.java
index 40cd5a903..538af8c79 100644
--- a/app/src/main/java/de/danoeh/antennapod/adapter/CoverTarget.java
+++ b/app/src/main/java/de/danoeh/antennapod/adapter/CoverTarget.java
@@ -48,7 +48,7 @@ class CoverTarget extends GlideDrawableImageViewTarget {
     }
 
     @Override
-    public void onResourceReady(GlideDrawable drawable, GlideAnimation anim) {
+    public void onResourceReady(GlideDrawable drawable, GlideAnimation<? super GlideDrawable> anim) {
         super.onResourceReady(drawable, anim);
         TextView txtvPlaceholder = placeholder.get();
         if (txtvPlaceholder != null) {
diff --git a/app/src/main/java/de/danoeh/antennapod/preferences/PreferenceController.java b/app/src/main/java/de/danoeh/antennapod/preferences/PreferenceController.java
index 6c03dc7ae..183ef338a 100644
--- a/app/src/main/java/de/danoeh/antennapod/preferences/PreferenceController.java
+++ b/app/src/main/java/de/danoeh/antennapod/preferences/PreferenceController.java
@@ -127,7 +127,7 @@ public class PreferenceController implements SharedPreferences.OnSharedPreferenc
      *
      * @return PreferenceActivity if the API level is greater than 10, PreferenceActivityGingerbread otherwise.
      */
-    public static Class getPreferenceActivity() {
+    public static Class<? extends Activity> getPreferenceActivity() {
         if (Build.VERSION.SDK_INT > 10) {
             return PreferenceActivity.class;
         } else {