how Android source code minify and obfuscate?

Question

I had done my apps, any idea to minify the Android and Java code? can it save the apk file size and improve performance? compare to unminify source code.

Answer 1

Enable shrinkResources in your build type. Note that it requires minify to be enabled. In your Gradle file:

android {
    buildTypes {
        release {
            minifyEnabled true
            shrinkResources true
        }
    }
}

The accepted answer is now outdated, so I added this answer if someone else stumbles upon this question.