如何从另一个更新TextView

Question

I am new to android/java programming. I have two class, one is an activity and other normal class. In my activity class contains TextView. Can i update my TextView of one class from a editText(that the user enters) in a another class. I tried with random code, but it fails. Please help I've been looking forever

Answer 1

You might update the TextView from wherever in the java code by referring to the

findViewById(R.id.some_text_view_name) .

Some what like this:

TextView textViewName = (TextView) findViewById(R.id.some_text_view_name);
textViewName.methodName();

Here methodName() refers to the Public methods listed here

Hope it helps. :)

Answer 2

You can start your second activity using startActivityForResult() instead of startActivity() . In the second activity you can set the result and its status using setResult() and get back to previous activity (via back press or something). In the first activity, this result will be received in onActvityResult() . From here, you can get the data set by second activity and update your textview.

This is the gist of what you are supposed to do. You can get code example here , here and here .