Add CrashlyticsNdk

README.md

@@ -42,6 +42,58 @@ And apply the fabric plugin `apply plugin: 'io.fabric'`
 
 Nothing more.
 
+### Symbolicating Native Android Crashes
+Unfortunately, even pure Dart projects can't always protect you from native
+crashes.  Without the following setup, a native crash like SIGSEGV will
+appear as a blank stacktrace in Crashlytics.  Here's how to get some symbols:
+
+Add the following to build.gradle, after `apply plugin: 'io.fabric'`:
+
+```
+crashlytics {
+    enableNdk true
+    androidNdkOut "../../debugSymbols"
+    androidNdkLibsOut "../../build/app/intermediates/transforms/stripDebugSymbol/release/0/lib"
+}
+```
+
+Ensure that the ndk-bundle is installed or the stripDebugSymbol directory won't
+get created.
+
+Now setup a release script to populate the debugSymbols directory, guided by
+the instructions from https://github.com/flutter/flutter/wiki/Crashes
+
+```
+# Build our app like usual
+flutter -v build apk --release
+
+### BEGIN MODIFICATIONS
+
+# Copy mergeJniLibs to debugSymbols
+cp -R ./build/app/intermediates/transforms/mergeJniLibs/release/0/lib debugSymbols
+
+# The libflutter.so here is the same as in the artifacts.zip found with symbols.zip
+cd debugSymbols/armeabi-v7a
+
+# Download the corresponding libflutter.so with debug symbols
+ENGINE_VERSION=`cat $HOME/flutter/bin/internal/engine.version`
+gsutil cp gs://flutter_infra/flutter/${ENGINE_VERSION}/android-arm-release/symbols.zip .
+
+# Replace libflutter.so
+unzip -o symbols.zip
+rm -rf symbols.zip
+
+# Upload symbols to Crashlytics
+cd ../../android
+./gradlew crashlyticsUploadSymbolsRelease
+
+### END MODIFICATIONS
+
+# Release our app like usual
+cd ../..
+fastlane submit_playalpha
+```
+
 ### iOS
 On iOS side your need to set your Fabric ID under your Info.plist like: 
 (Only do this if using Fabric, not Firebase as you will not have an Api Key)

android/build.gradle

@@ -37,4 +37,7 @@ dependencies {
     api('com.crashlytics.sdk.android:crashlytics:2.9.8@aar') {
         transitive = true
     }
+    api('com.crashlytics.sdk.android:crashlytics-ndk:2.0.5@aar') {
+        transitive = true
+    }
 }

android/src/main/java/com/kiwi/fluttercrashlytics/FlutterCrashlyticsPlugin.java

@@ -5,6 +5,7 @@
 import android.util.Log;
 import com.crashlytics.android.Crashlytics;
 import com.crashlytics.android.core.CrashlyticsCore;
+import com.crashlytics.android.ndk.CrashlyticsNdk;
 import io.fabric.sdk.android.Fabric;
 import io.flutter.plugin.common.MethodCall;
 import io.flutter.plugin.common.MethodChannel;
@@ -29,7 +30,7 @@ public static void registerWith(PluginRegistry.Registrar registrar) {
     @Override
     public void onMethodCall(MethodCall methodCall, MethodChannel.Result result) {
         if (methodCall.method.equals("initialize")) {
-            Fabric.with(context, new Crashlytics());
+            Fabric.with(context, new Crashlytics(), new CrashlyticsNdk());
             result.success(null);
         } else {
             if (Fabric.isInitialized()) {