Out of memory error: Java heap memory on Android Studio

Question

How do I fix java.lang.OutOfMemoryError: Java heap space when compiling my Android project?

I get this after I upgraded to version 1 of Android Studio.

Answer 1

i'm using Windows OS. I solved this by updating _JAVA_OPTIONS to '-Xmx1024m'

1. Win + X, choose SYSTEM
2. Choose 'Advanced system settings'
3. Choose 'Environment Variables'
4. Create / Edit a variable named as '_JAVA_OPTIONS'
5. update variable value as -Xmx1024m

click to see snapshot

Answer 2

The answers above are for gradle builds (or the general -Xmx). In case someone gets here for a non-gradle project, I solved the issue by increasing the maximum heap size of DEX in android studio settings => Build, Execution, Deployment => Compiler => Android Compilers

Answer 3

This issue also may happen with usage of the debug build of Proguard. To solve it change minifyEnabled and shrinkResources to false.

android {
...
buildTypes {
    release {
        minifyEnabled true
        shrinkResources true
        proguardFiles getDefaultProguardFile('proguard-android.txt')
    }

    debug {
        minifyEnabled false
        shrinkResources false
        proguardFiles getDefaultProguardFile('proguard-android.txt')
    }
} }  

Answer 4

This is old, but just add this to the build file

dexOptions {
    javaMaxHeapSize "2g"
}

Answer 5

I had a similar issue on Android Studio 2.3.3. APK packaging would fail saying Java heap space when building from Android Studio and trying to process a 300MB .so library. In my case two things were needed to fix it. Your build.gradle should contain something like that:

android {
    dexOptions {
        javaMaxHeapSize "4G"
    }
}

At the root of your project you need to have a file named gradle.properties containing the following:

# That's needed for java to be able the create the APK with our 300MB native  library
# Basically we grant java a 4GB heap.
org.gradle.jvmargs=-Xmx4608m

Answer 6

you have changed the wrong arguments, you should increase the size on -XX:MaxPermSize=512M to -XX:MaxPermSize=2048M or so :) because the android emulator uses a lot of RAM.