Info Obfuscated methods


Obfuscation refers to methods to obscure code and make it hard to understand. Compiled Java classes can be decompiled if there is no obfuscation during compilation step.

Adversaries can steal code and repurpose it and sell it in a new application or create a malicious fake application based on the initial one.

Code obfuscation only slows the attacker from reverse engineering but does not make it impossible.


Design the application to add the following protections and slow reverse engineering of the application:

  • Obfuscate Java source code with tools like Proguard or Dexguard
  • buildTypes {
            release {
                minifyEnabled true
                proguardFiles getDefaultProguardFile('proguard-android.txt'),
  • Verification application signing certificate during runtime by checking context.getPackageManager().signature
  • Check application installer to ensure it matches the Android Market by calling context.getPackageManager().getInstallerPackageName
  • Check running environment at runtime
  • private static String getSystemProperty(String name) throws Exception {
        Class systemPropertyClazz = Class.forName("android.os.SystemProperties");
        return (String) systemPropertyClazz.getMethod("get", new Class[] { String.class }).invoke(systemPropertyClazz, new Object[] { name });
    public static boolean checkEmulator() {
        try {
            boolean goldfish = getSystemProperty("ro.hardware").contains("goldfish");
            boolean qemu = getSystemProperty("ro.kernel.qemu").length() > 0;
            boolean sdk = getSystemProperty("ro.product.model").equals("sdk");
            if (qemu || goldfish || sdk) {
                return true;
        } catch (Exception e) {
        return false;
  • Check debug flag at runtime
  • context.getApplicationInfo().applicationInfo.flags & ApplicationInfo.FLAG_DEBUGGABLE;

Technical details
de.hdodenhof.circleimageview True
com.fmsirvent.ParallaxEverywhere True True
com.squareup.moshi True True True
org.slf4j True
com.trello.rxlifecycle True
com.getbase.floatingactionbutton True True True
a.a True True True True
it.sephiroth.rxbroadcast True
okhttp3 False
butterknife False True
com.d.a True
com.f.a True
com.c.a True True
proguard.annotation False True True False
com.bumptech.glide True
org.parceler True
rx True
okio True False
org.onepf.openpush False True
javax.inject False
dagger True True
retrofit2 False
com.e.a True
org.greenrobot.eventbus True
com.squareup.okhttp True
icepick False