In API level 11 a new Intent Flag was added just for this: Intent.FLAG_ACTIVITY_CLEAR_TASK
Just to clarify, use this:
Java
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
Kotlin
intent.flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK
Unfortunately for API lvl <= 10, I haven’t yet found a clean solution to this.
The “DontHackAndroidLikeThis” solution is indeed pure hackery. You should not do that. 🙂
Edit:
As per @Ben Pearson‘s comment, for API <=10 now one can use IntentCompat class for the same. One can use IntentCompat.FLAG_ACTIVITY_CLEAR_TASK
flag to clear task. So you can support pre API level 11 as well.