有了属性动画(1)的基础后,我们进阶玩法,为动画设置监听事件。
先看一下消失的Button,核心代码3行。
在布局文件中添加Button,为其指定响应方法clickListener:
在Activity中完成响应方法:
public void dismiass(View view){
ObjectAnimator animator = ObjectAnimator.ofFloat(view,"alpha",0f,1f);
animator.setDuration(1000);
animator.start();
}
设置透明度,run一下,消失的按钮~Get。
进入正题,为其设置监听事件,强大的AnimatorListener,给人无限遐想:
animator.addListener(new Animator.AnimatorListener() {
@Override
public void onAnimationStart(Animator animator) {
}
@Override
public void onAnimationEnd(Animator animator) {
Toast.makeText(FirstClassActivity.this,"onAnimationEnd.",Toast.LENGTH_SHORT).show();
}
@Override
public void onAnimationCancel(Animator animator) {
}
@Override
public void onAnimationRepeat(Animator animator) {
}
});
下面我们实现Path2.0酷炫的动画效果:一一初始化图片并为其设置监听事件:
private int mResIdArray[] = {R.id.a_iv_path,R.id.b_iv_path,R.id.c_iv_path,R.id.d_iv_path,R.id.e_iv_path,
R.id.f_iv_path,R.id.g_iv_path,R.id.h_iv_path};
private List mImageList = new ArrayList();
private ImageView mTempImage;
private boolean mAnimFlag = true;
@Override
public void initView() {
for (int i = 0;i < mResIdArray.length;i++){
mTempImage = (ImageView) findViewById(mResIdArray[i]);
mTempImage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
switch (v.getId()){
case R.id.a_iv_path:
if (mAnimFlag){
startAnim();
}else {
closeAnim();
}
break;
default:
Toast.makeText(PathActivity.this,"Click-" + v.getId(),Toast.LENGTH_SHORT).show();
break;
}
}
});
mImageList.add(mTempImage);
}
}
设置开始动画和结束动画,
开始动画如下,同时设置X轴和Y轴的平移动画,组合一下,特别值得一提的是设置差值器(重力加速度),效果十分酷炫最后记得设置标志位,实现开始和结束的切换:
private void startAnim() {
for (int i = 1;i < mResIdArray.length;i++){
ObjectAnimator animator1 = ObjectAnimator.ofFloat(mImageList.get(i),
"translationY",0f,10f + i*50f);
ObjectAnimator animator2 = ObjectAnimator.ofFloat(mImageList.get(i),
"translationX",0f,400f - i*50f);
AnimatorSet set = new AnimatorSet();
set.playTogether(animator1,animator2);
set.setDuration(700);
set.setInterpolator(new BounceInterpolator());//设置差值器,重力加速度
set.setStartDelay(i*300);
set.start();
}
mAnimFlag = false;
}
结束动画和开始动画类似,只不过正好将变化范围倒过来。
private void closeAnim() {
for (int i = 1;i < mResIdArray.length;i++){
ObjectAnimator animator1 = ObjectAnimator.ofFloat(mImageList.get(i),
"translationY",i*300f,0f);
ObjectAnimator animator2 = ObjectAnimator.ofFloat(mImageList.get(i),
"translationX",i*300f,0f);
AnimatorSet set = new AnimatorSet();
set.playTogether(animator1,animator2);
set.setDuration(700);
set.setInterpolator(new BounceInterpolator());//设置差值器,重力加速度
set.setStartDelay(i*300);
set.start();
}
mAnimFlag = true;
}
布局文件如下,一笔带过:
原创不易,转载请注明出处哈。
权兴权意
产品可以更优雅~
项目实战:浅谈属性动画(2)-动画监听事件,消失的按钮,酷炫Path2.0 - hxqneuq2012的专栏 - 博客频道 - CSDN.NET http://blog.csdn.net/hxqneuq2012/article/details/62222257
项目源代码,欢迎提建议(star)。
https://github.com/HXQWill/QuanStudy/blob/master/app/src/main/java/com/example/quan/quanstudy/objectAnimator/PathActivity.java