如何将动画添加到现有的UI组件？

Question

How would Be able to add animations to normal buttons within an android application, I want the button to float from the button of the activity towards the top and then disappear.

I have looked into the animations library but it seems to me that it is intended for use with external animation that are imported into the project!

Many thanks!

Answer 1

Try this:

    button.animate().translationY(value).setListener(new Animator.AnimatorListener() {
        @Override
        public void onAnimationStart(Animator animation) {
        }

        @Override
        public void onAnimationEnd(Animator animation) {
            button.setVisibility(View.GONE);
        }

        @Override
        public void onAnimationCancel(Animator animation) {
        }

        @Override
        public void onAnimationRepeat(Animator animation) {
        }
    }).start();

You might need some calculation for the "value", or use translationYBy() with a distance.

Answer 2

in you res fodlder create new folder with name anim create new xml file there with slide_up.xml and put this code to it

<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:fillAfter="true" >

    <scale
        android:duration="500"
        android:fromXScale="1.0"
        android:fromYScale="1.0"
        android:interpolator="@android:anim/linear_interpolator"
        android:toXScale="1.0"
        android:toYScale="0.0" />

</set>

then load animation like this

        Animation animSlideUp;
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            // TODO Auto-generated method stub
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_fadein);

            txtMessage = (TextView) findViewById(R.id.txtMessage);
            btnStart = (Button) findViewById(R.id.btnStart);

            // load the animation
            animSlideUp = AnimationUtils.loadAnimation(getApplicationContext(),
                    R.anim.slide_up);

            // set animation listener
            animSlideUp.setAnimationListener(this);

            // button click event
            btnStart.setOnClickListener(new View.OnClickListener() {

                @Override
                public void onClick(View v) {
                    txtMessage.setVisibility(View.VISIBLE);

                    // start the animation
                    txtMessage.startAnimation(animSlideUp);
                }
            });

        }

  @Override
    public void onAnimationEnd(Animation animation) {
        // Take any action after completing the animation

        // check for fade in animation
        if (animation == animSlideUp) {
            Toast.makeText(getApplicationContext(), "Animation Stopped",
                    Toast.LENGTH_SHORT).show();
        }

    }

    @Override
    public void onAnimationRepeat(Animation animation) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onAnimationStart(Animation animation) {
        // TODO Auto-generated method stub

    }