BlackDex is an Android unpack tool, it supports Android 5.0~12 and need not rely to any environment. BlackDex can run on any Android mobile phone or emulator, you can unpack APK File in several seconds.

BlackDex will fix the DexCode in deep unpacking mode, it can load DexCode which were pointed to other Memory Blocks into DexFile. By this way, we can restore some methods which were erased with NOP. But it can not fix all methods. For example, some applications restore the instructions just before being executed. In this situation, BlackDex can not restore the instructions into DexFile. Deep Unpacking dose not include operation of decryption and executing methods. This feature was still in the test phase, it is possible that following cases will occur, may the NOP has no longer exists in this world!
1.BlackDex will take more time to unpack an app, it expected to take a few minutes or more.
2.The target application is possible to crash when BlackDex is unpacking it(Environment detection, etc).
3.The failure rate of unpacking will be increased.
4.It may not always fix all methods successfully.