android studio memory fix for 4GB ram
$ more studio64.vmoptions
# custom Android Studio VM options, see https://developer.android.com/studio/intro/studio-config.html
-Didea.filewatcher.disabled=true
-Xms64m
-Xmx512m
-XX:MetaspaceSize=64m
-XX:MaxMetaspaceSize=512m
-XX:ReservedCodeCacheSize=128m
-XX:CompressedClassSpaceSize=256m
-XX:+UseStringDeduplication
-XX:+UseCodeCacheFlushing
-XX:+UseCompressedOops
-XX:+HeapDumpOnOutOfMemoryError
-Dfile.encoding=UTF-8
$ more gradle.properties
org.gradle.jvmargs=-Xms64m -Xmx512m -XX:+UseCompressedOops -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8