title: Error "validate_display:255 error 3008 (EGL_BAD_DISPLAY)" by Toutorial
body: <p>I'm new to javascript and android and I want to program a multi page app with SAPUI5. For this I found a tutorial:
  <a href="https://sapui5.hana.ondemand.com/sdk/#docs/guide/df86bfbeab0645e5b764ffa488ed57dc.html">https://sapui5.hana.ondemand.com/sdk/#docs/guide/df86bfbeab0645e5b764ffa488ed57dc.html</a>
  which works fine, up to Walk through - Step 8. I have exactly the same source code in my project, but it doesn't work. I get following errors:</p>
  
  <pre><code>  E/Zygote: MountEmulatedStorage()
  E/Zygote: v2
  E/SELinux: [DEBUG] get_category: variable seinfo: default sensitivity: NULL, cateogry: NULL
  E/SysUtils: ApplicationContext is null in ApplicationStatus
  E/libEGL: validate_display:255 error 3008 (EGL_BAD_DISPLAY)
  E/AndroidProtocolHandler: Unable to open asset URL: file:///android_asset/i18n/i18n_de_DE.properties
  </code></pre>
  
  <p>I know the first and the second, but I don't find information for the rest.</p>
  
  <p>Does anybody know where they come from and how to solve it?</p>
  
  <p>Answere:</p>
  
  <p>I don't know what the problem actually was. I tried with the SDK-versions and get many many gradle errors. After I solved it, I used the code out of Step 7 an added only the yellow colored lines and delete what was to delete. </p>