Android 心跳呼吸动画

废话少说，看东西

一个很简单的心跳呼吸的动画，几行代码搞定；

代码：

    private ImageView ivHart;                //图片

    AlphaAnimation alphaAnimation = null;    //透明度动画

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_anim);

        ivHart = (ImageView) findViewById(R.id.ivHart);

        shadeAnim(ivHart);

    }

    @Override

    protected void onResume() {

        super.onResume();

        if (alphaAnimation != null) {

            alphaAnimation.start();

        }

    }

    @Override

    public void onPause() {

        super.onPause();

        if (alphaAnimation != null) {

            alphaAnimation.cancel();

        }

    }

    /**

     * 渐变动画

     *

     * @param view 执行该动画的view对象

     */

    private void shadeAnim(View view) {

        alphaAnimation = new AlphaAnimation(0.1f, 1.0f);

        alphaAnimation.setDuration(1000);

        alphaAnimation.setRepeatCount(-1);

        alphaAnimation.setRepeatMode(Animation.REVERSE);

        alphaAnimation.start();

        view.setAnimation(alphaAnimation);

    }