title: Android - twitter4j Proguard error
body: <p>I was having problems trying to obfuscate my apk - the same problem as reported in <a href="https://stackoverflow.com/questions/14501759/proguard-errors-with-external-jar-returns-error-code-1">this SO question</a>. I applied the accepted answer for that question, and my apk was then built.</p>
  
  <p>However, when I run my application, it crashes before the first splash screen is displayed.</p>
  
  <p>How can I debug this and/or is there anything that might be missing from my <strong>proguard-project.txt</strong> file??...</p>
  
  <pre><code># To enable ProGuard in your project, edit project.properties
  # to define the proguard.config property as described in that file.
  #
  # Add project specific ProGuard rules here.
  # By default, the flags in this file are appended to flags specified
  # in ${sdk.dir}/tools/proguard/proguard-android.txt
  # You can edit the include path and order by changing the ProGuard
  # include property in project.properties.
  #
  # For more details, see
  #   http://developer.android.com/guide/developing/tools/proguard.html
  
  # Add any project specific keep options here:
  
  # If your project uses WebView with JS, uncomment the following
  # and specify the fully qualified class name to the JavaScript interface
  # class:
  #-keepclassmembers class fqcn.of.javascript.interface.for.webview {
  #   public *;
  #}
  
  -dontwarn twitter4j.**
  </code></pre>
  
  <p>NB - I also use the <strong>android-support-v4.jar</strong> and <strong>acra-4.5.0.jar</strong> libraries in my app.</p>