Android app crash in release mode

[ngbahiep]

Describe the bug

Hi,
I am using this sdk to connect to aws mqtt. everything works fine in debug mode. However, app crash in release mode.
I do some testing and found that if I set minifyEnabled and shrinkResources to false, it works. Otherwise, it does not.
Below is the error:
`#1 pc 001c3d97 /data/app/com.xxx.xxx-zJ8Km5JEAhZ5OvpxzwJOMQ==/lib/arm/libaws-crt-jni.so (aws_fatal_assert+50)'

'#2 pc 000525e3 /data/app/com.xxx.xxx-zJ8Km5JEAhZ5OvpxzwJOMQ==/lib/arm/libaws-crt-jni.so (cache_java_class_ids+17026)'

'#3 pc 000490ab /data/app/com.xxx.xxx-zJ8Km5JEAhZ5OvpxzwJOMQ==/lib/arm/libaws-crt-jni.so (Java_software_amazon_awssdk_crt_CRT_awsCrtInit+258)'

'#4 pc 0003677b /data/app/com.xxx.xxx-zJ8Km5JEAhZ5OvpxzwJOMQ==/oat/arm/base.odex (offset 0x34000)`

Expected Behavior

I expect app should work

Current Behavior

current is app crash

Reproduction Steps

It crashes when start connect to mqtt

Possible Solution

No response

Additional Information/Context

No response

SDK version used

v1.14.0

Environment details (OS name and version, etc.)

android

[bretambrose]

Android isn't officially supported yet. I'll bring this up with the engineer working on it though.

[bretambrose]

I should have added to the original response: minify/shrink will absolutely not work under any circumstances until (unless) we add support to essentially skip the entire common runtime from the tree-shaking. The native part of the common runtime uses JNI references to classes and minify/shrink will throw those methods/classes away because it doesn't understand usage external to Java.

[ngbahiep]

thank you @bretambrose . I excluded aws iot sdk in proguard file. my android app works now.

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[jleskovar-tyro]

For future Android travellers - the following proguard declarations should be enough to prevent the crash

-keepclasseswithmembernames class * {
    native <methods>;
}

-keep class software.amazon.awssdk.crt.** { *; }
-keep class software.amazon.awssdk.iot.** { *; }