title: Android app crash by "FileNotFoundException for drawable in drawable-xhdpi-v4"
body: <p>guys.I got a crash becasue of "java.io.FileNotFoundException: res/drawable-xhdpi-v4/component_tip_loading1.png".
  But I unziped my apk and found the resource is existed.
  And my build.gradle set minifyEnabled is true, but not set the shrinkResources.<br>
  Thanks for any advice.</p>
  
  <pre><code>Caused by: java.io.FileNotFoundException: res/drawable-xhdpi-v4/component_tip_loading1.png
  at android.content.res.AssetManager.openNonAssetNative(Native Method)
  at android.content.res.AssetManager.openNonAsset(AssetManager.java:405)
  at android.content.res.Resources.loadDrawableForCookie(Resources.java:2443)  
  </code></pre>