How to animate a FadeOut and FadeIn while textView changed text

Question

i try to animate a TextView on a changeText But always see only one direction of the animation, i only see the fadeout

What i try is: beforChange = fadeOut and onChange or after fadein

here is my code in the onCreate method of my activity:

    final Animation out = new AlphaAnimation(1.0f, 0.0f);
    out.setDuration(1000);

    final Animation in = new AlphaAnimation(0.0f, 1.0f);
    in.setDuration(1000);


    bidFirst.setAnimation(out);
    bidMiddle.setAnimation(out);
    bidLast.setAnimation(out);

    TextWatcher bidWatcher = new TextWatcher() {
      public void onTextChanged(CharSequence s, int start, int before, int count) {
        in.startNow();
        bidFirst.setAnimation(out);
        bidMiddle.setAnimation(out);
        bidLast.setAnimation(out);
      }

      public void beforeTextChanged(CharSequence s, int start, int count, int after) {
        out.startNow();
        bidFirst.setAnimation(in);
        bidMiddle.setAnimation(in);
        bidLast.setAnimation(in);
      }

      public void afterTextChanged(Editable s) {
      }
    };
    bidFirst.addTextChangedListener(bidWatcher);
    bidMiddle.addTextChangedListener(bidWatcher);
    bidLast.addTextChangedListener(bidWatcher);

i think there is something wrong in my code but for my believe it has to work.

What i have now is: on every setText the changed Text only FadeOut but after the text has changed and never FadeIn!?

Answer 1

TextSwitcher is exactly what you are looking for. Just use their setInAnimation() and setOutAnimation. Than the animations will run automatically if you change the text by setText()