Android片段活动

Question

I have a small problem. in my activity i have a button and in my fragment i have textboxes.

Now when i click on the button i want see a dialog with the information of the textboxes.Below you can see my dialog that stands in my activity

   public void onFragmentInteraction(Person uri) {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setMessage("test");
        builder.show();

    }

My actionlistener of my button is in my activity and my textboxes are in my fragment. I have tried this with a bundle but this didn't work.

Someone can help me with this ?

Answer 1

If you really must keep your button and textviews in seperate activity/components then you'll need to allow some communication between the two.

here's a nice tutorial on how to do this - https://developer.android.com/training/basics/fragments/communicating.html

A really rough way to achieve what you want is to pass text changes from your textview and store them in your activity.

something like -

      textView.addTextChangedListener(new TextWatcher() {
        @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) {

        }

        @Override public void onTextChanged(CharSequence s, int start, int before, int count) {

        }

        @Override public void afterTextChanged(Editable s) {
            ((ActivityName)getActivity()).setSomeText(s.toString());

        }
    });

in the activity you would then create a matching public method

public void setSomeText(String someText) {
    this.someText = someText;
}

you can then access "someText" in the activity.

This should be done through an interface

Answer 2

您应该将侦听器放在片段中，并以编程方式在Java中而不是在XML中进行设置。