How to add debug symbols to build.gradle

To use the option ndk debugSymbolLevel as written in the docs you need an android gradle plugin 4.1 or later. At the time of writing the lastest 4.1 version is 4.1.2

You will need also to install ndk and cmake for android studio.

In your android build.gradle you need the to set android gradle plugin version 4.1.2:

buildscript {    ...    repositories {        google()        jcenter()    }    dependencies {        classpath 'com.android.tools.build:gradle:4.1.2'        ...    }

Then in the android/app build.gradle add:

...android {    ...    // you see the ndk version in the android studio sdk-manager    // have a look also here: https://stackoverflow.com/a/65747847/9481613    ndkVersion "21.3.6528147"     ...    buildTypes {        release {            ...            ndk {                debugSymbolLevel 'SYMBOL_TABLE'            }        }       }}

when you then run: flutter build appbundle it should finish after a while with an appbundle that is twice the size.

There's two places in the app/build.gradle where you can specify bundling of debugging symbols with your app. If you use android.defaultConfig.ndk.debugSymbolLevel it will apply it to all build types (i.e., both debug and release builds). On the other hand, if you use android.buildTypes.release.ndk.debugSymbolLevel it will apply only to your release build.

These options have to be added into your app/build.gradle file as you correctly guessed. When you see a build property that's in this dotted notation, it actually corresponds to nested blocks in the build.gradle, which would look a bit like this:

android {    compileSdkVersion 28    defaultConfig {        applicationId 'com.example.foo'        minSdkVersion 23        targetSdkVersion 28        versionCode 42        versionName "4.0.2"        ndk {            debugSymbolLevel 'SYMBOL_TABLE'        }    }    // Rest of the file}

HTH

Use Android Version 4.1 and above currently 4.1 RC 3 and 4.2 Canary 13 is available, and similarly use com.android.tools.build:gradle 4.1 and above, you can search for the suitable version from here

Then use this line in android -> defaultConfig in your app build.gradle file

    ndk { debugSymbolLevel 'FULL' }