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androidandroid-activityparentback

Android set back button to last activity

I have two activities which I'll call Activity A and Activity B. Activity A and Activity B both have a button that will take them to the final activity. Because I can arrive at the final activity different ways, I cannot just set a parent and navigate back to that. How can I set things so it knows which activity was used last and go back to that one?

Solution

  • In your Activity A / B when call C use: 

    Intent intent = new Intent(this, ActivityC.class);
intent.putExtra("caller", "ActivityClassName");
startActivity(intent);

    In your Activity C:

    @Override
public void onBackPressed() {

Bundle extras = getIntent().getExtras();
if (extras != null) {
    String value = extras.getString("caller");
    startActivity(this, Class.forName(value));
} 
}