I couldn't find how to run directly on LAMW. But maybe somebody needs it. After importing the project Eclipse
In the project.properties file
proguard.config=${sdk.dir}/tools/proguard/proguard-android.txt:proguard-project.txt
activated. In the meantime, if you are using java 1.8 and later, you should use proguard version 5 and above.
Behind, to the proguard-project.txt file
-keep class com.your_package_name. ** {*; }
I added the line.Signing and proguard were done smoothly. You can install the resulting apk smoothly in play store.