Android: Killing an activity

Question

I have an activity where a user put his nickname. I want to not be able to go back after this. I have tried everything but no luck. Tried so far :

Manifest

 <activity
     android:name=".NewUserActivity"
     android:noHistory="true" />
 <activity android:name=".PvP.PVPWinningActivity" />

In Activity:

btnEnterDungeons.setOnClickListener(new View.OnClickListener() {          
     @Override
     public void onClick(View view) {           
        if(!TextUtils.isEmpty(editUsername.getText().toString().trim())) {
             uploadUserData();
             Intent intent = new Intent();
             intent.setClass(NewUserActivity.this, GameChooseActivity.class);
             intent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
             startActivity(intent);
             finish();
 }

or in Activity again:

btnEnterDungeons.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View view) {
         if(!TextUtils.isEmpty(editUsername.getText().toString().trim())) {
             uploadUserData();
             Intent intent = new Intent();
             intent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
             intent.setClass(NewUserActivity.this, GameChooseActivity.class);                    
             startActivity(intent);
             finish();
 }

None of these works. Actually, I want to completely kill the activity, no back button or any way to have access again.

Answer 1

In NewUserActivity, override OnBackPressed() method then call finish; to kill the current activity; See sample implementation below:

@Override public void onBackPressed() {

                    killActivity();

            })
            .setNegativeButton("No", null)
            .show();
}

private void killActivity() {
    finish();
}