效果图如下
ScreenGif.gif
是在fragment中跳转activity实现的效果，fragment跳fragment，activity跳activity类似~~
实现过程
- 重写
FloatingActionButton的onTouchListener（）方法，使小球可以移动,并判断边界 - 点击fab时记录坐标传到下一个页面,在下一个页面展示动画。
- 点击后退或者重写
onBackPressed()方法，执行动画
重写Fab的onTouchListener()
floatingActionButton.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent ev) {
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
downX = ev.getX();
downY = ev.getY();
isClick = true;
break;
case MotionEvent.ACTION_MOVE:
isClick = false;
moveX = ev.getX();
moveY = ev.getY();
int offsetX = (int) (moveX - downX);
int offsetY = (int) (moveY - downY);
//这里使用了setTranslation来移动view。。。尝试过layout。不知道为什么fragment切换回来的时候会恢复原位
floatingActionButton.setTranslationX(floatingActionButton.getTranslationX() + offsetX);
floatingActionButton.setTranslationY(floatingActionButton.getTranslationY() + offsetY);
break;
case MotionEvent.ACTION_UP:
//用来触发点击事件
if (isClick) {
startAct();
return false;
}
//用来判断移动边界
if (floatingActionButton.getX() < 0) {
floatingActionButton.setX(0);
}
if (floatingActionButton.getX() + floatingActionButton.getWidth() > ScreenUtil.getScreenWidth(getContext())) {
floatingActionButton.setX(ScreenUtil.getScreenWidth(getContext()) - floatingActionButton.getWidth());
}
if (floatingActionButton.getY() < titleHeight) {
floatingActionButton.setY(0);
}
if (floatingActionButton.getY() + floatingActionButton.getHeight() + titleHeight >
getActivity().findViewById(R.id.activity_main_mainLl).getHeight() - getActivity().findViewById(R.id.fc_rg).getHeight()) {
floatingActionButton.setY(getBottomY());
}
break;
}
return true;
}
private void startAct() {
//跳转Activity,传递动画参数
Intent intent = new Intent(getActivity(), CheckWorkActivity.class);
intent.putExtra("x", (int) floatingActionButton.getX() + floatingActionButton.getWidth() / 2);
intent.putExtra("y", (int) floatingActionButton.getY() + floatingActionButton.getHeight() / 2);
intent.putExtra("start_radius", floatingActionButton.getWidth() / 2);
intent.putExtra("end_radius", DialogFragment.this.view.getHeight());
startActivity(intent);
}
});
在下一个页面中实现CircleRevel动画
onCrete中调用
private void initAnimation() {
//ll为根布局
final LinearLayout linearLayout = (LinearLayout) findViewById(R.id.ll);
linearLayout.post(new Runnable() {
@Override
public void run() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
Animator animator = ViewAnimationUtils.createCircularReveal(
linearLayout,// 操作的视图
getIntent().getIntExtra("x", 0), // 动画的中心点X
getIntent().getIntExtra("y", 0) + findViewById(R.id.title).getHeight(), // 动画的中心点Y
getIntent().getIntExtra("start_radius", 0), // 动画半径
getIntent().getIntExtra("end_radius", 0) // 动画结束半径
);
animator.setInterpolator(new AccelerateInterpolator());
animator.setDuration(500);
animator.start();
}
}
});
}
点击后退或者触发onBackPressed时候调用
private void endAnim() {
final LinearLayout linearLayout = (LinearLayout) findViewById(R.id.ll);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
Animator animator = ViewAnimationUtils.createCircularReveal(
linearLayout,// 操作的视图
getIntent().getIntExtra("x", 0),
getIntent().getIntExtra("y", 0) + findViewById(R.id.title).getHeight(),
getIntent().getIntExtra("end_radius", 0),
getIntent().getIntExtra("start_radius", 0)
);
animator.setInterpolator(new AccelerateInterpolator());
animator.setDuration(500);
animator.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
super.onAnimationEnd(animation);
finish();
}
});
animator.start();
}
}
还有一个重要的地方是修改两个activity的theme
<style name="AppThemeCircleRevel" parent="Theme.AppCompat.Light.NoActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/blue</item>
<item name="android:windowAnimationStyle">@null</item>
<item name="android:windowBackground">@android:color/transparent</item>
<item name="android:windowIsTranslucent">true</item>
<item name="android:colorBackgroundCacheHint">@null</item>
</style>
