app crashed wiht classes.dex permission denied error

Question

My app is crashed with following error,

 E/dex2oat: Failed to create oat file:/data/dalvik-cache/arm/data@[email protected]@[email protected]: Permission denied

And our app use mutipule dex, does they have relation?

Answer 1

I had a similar problem and my solution was disable the Instant Run, if you're using Android Studio...

Answer 2

I had got a similar error when i used multi dex for the first time, This guide helped a lot,

My error was i forgot to add this in the application class:

public class MyApplication extends SomeOtherApplication {
  @Override
  protected void attachBaseContext(Context base) {
     super.attachBaseContext(base);
     MultiDex.install(this);
  }
}

in your build gradle, make sure you have included the following lines:

android {
    defaultConfig {
        ...
        minSdkVersion 15 
        targetSdkVersion 25
        multiDexEnabled true
    }
    ...
}

dependencies {
  compile 'com.android.support:multidex:1.0.1'
}

Even then multi dex has limitations with progaurd, read the guide to find out if that is causing this issue.