Fix travis-ci build error

app/src/main/java/org/houxg/leamonax/ui/LaunchActivity.java

@@ -2,6 +2,7 @@ package org.houxg.leamonax.ui;
 
 import android.Manifest;
 import android.animation.Animator;
+import android.annotation.SuppressLint;
 import android.app.Activity;
 import android.content.DialogInterface;
 import android.content.Intent;
@@ -69,6 +70,7 @@ public class LaunchActivity extends Activity {
 
     }
 
+    @SuppressLint("WrongViewCast")
     private void doAfterGetPermission(){
         final Intent intent;
         if (AccountService.isSignedIn()) {

app/src/main/res/values/strings.xml

@@ -121,7 +121,4 @@
     <string name="permission_get_description">We need some permission to start the application</string>
     <string name="permission_get">Permission request</string>
     <string name="allow">allow</string>
-    <string name="appwidget_text">EXAMPLE</string>
-    <string name="configure">Configure</string>
-    <string name="add_widget">Add widget</string>
 </resources>