Missing 64-bit version of librealmreact.so - realm

Question

Using:
realm 2.22.0
react-native 0.58.5
Attempting to run on Android (6.0) 64-bit Huawei P9 lite
Building with Android Studio
Application crashes immediately with error:
E/SoLoader: Error when loading lib: dlopen failed: "/data/data/com.netballninja/lib-main/librealmreact.so" is 32-bit instead of 64-bit lib .....
Running the application on 32-bit Android simulator is fine.
I have analyzed the APK file and indeed under /libs/arm64-v8a the librealmreact.so does not exist (only under armeabi-v7a). 64-bit support appears to have been back ported into react-native 0.58.4 (originally slated for 0.59).
I have tried removing the inclusion of arm64-v8a support from the APK, (thinking that Android OS would drop back to 32-bit if no 64-bit libs were present) and the application does then run in 32-bit mode on the 64-bit device.
I assume that I do require a librealmreact.so that is 64-bit (precompiled). How do I ensure that my bundling includes that?

Answer 1

you must add this line to app/build.gradle
android {
....
defaultConfig {
....
ndk {
abiFilters "armeabi", "armeabi-v7a", "x86", "mips"
}
}
}

Answer 2

This is a known bug of SoLoader.
Fixed in v0.8.0 by this.
As you said, the real reason which causes app crashed is that:
the application does then run in 32-bit mode on the 64-bit device.
SoLoader will follow certain of rules to extract some .so files from .apk file when the application runs first time. In 64-bit device, if the .apk file includes 64-bit .so files, soloader will extract them instead of 32-bit files.
Therefore, you can try to fix this problem by following the steps below:
Make sure that build.gradle of module like this:
...
android {
...
splits {
abi {
include "armeabi-v7a", "x86", "arm64-v8a", "x86_64"
}
}
defaultConfig {
ndk {
abiFilters "armeabi-v7a", "x86", "arm64-v8a", "x86_64"
}
}
}
If step1 can not fix your problem, try to upgrade SoLoader to version 0.8.0:
configurations.all {
resolutionStrategy {
force "com.facebook.soloader:soloader:0.8.0"
}
}