Android test was failing because some licenses weren't accepted

.travis.yml

@@ -51,7 +51,7 @@ jobs:
     - NDK_DIR=$HOME/android-ndk
     android:
       components:
-      - android-23
+      - android-27
     addons:
       apt:
         packages:
@@ -59,6 +59,9 @@ jobs:
     cache:
       directories:
       - $HOME/sfml-cache
+    before_script:
+      - yes | sdkmanager --update
+      - yes | sdkmanager --licenses
     script:
       - chmod +x tests/travis_android.sh
       - tests/travis_android.sh

examples/android/app/build.gradle

@@ -3,8 +3,8 @@ apply plugin: 'com.android.application'
 android {
     compileSdkVersion 27
     defaultConfig {
-        applicationId "org.sfmldev.android"
-        minSdkVersion 14
+        applicationId "com.example.tgui"
+        minSdkVersion 19
         targetSdkVersion 19
         versionCode 1
         versionName "1.0"