我想制作一个我试图描述的简单动画。在1号屏幕中间有一个小圆圈,然后按下它时,圆形动画显示一个矩形按钮。我不知道我是否以最好的方式做到了,但这里是
circle.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval">
<solid android:color="@color/circle_color"></solid>
<size
android:width="50dp"
android:height="50dp"/>
</shape>
我片段的布局
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/fragments_container">
<Button
android:id="@+id/my_button"
android:layout_width="200dp"
android:layout_height="100dp"
android:layout_gravity="center"
android:background="@color/buttons_color"
android:visibility="invisible"
/>
<ImageView
android:id="@+id/circle_image"
android:layout_gravity="center"
android:layout_width="50dp"
android:layout_height="50dp"
app:srcCompat="@drawable/circle" />
</FrameLayout>
然后在我的片段
中@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
activity = (MainActivity) getActivity();
final View fragments_container = activity.findViewById(R.id.fragments_container);
final Button button = (Button) activity.findViewById(R.id.my_button);
final ImageView image = (ImageView) activity.findViewById(R.id.circle_image);
image.setOnClickListener(new ImageView.OnClickListener(){
@Override
public void onClick(View v) {
Animator animator = ViewAnimationUtils.createCircularReveal(fragments_container,
image.getLeft() + image.getWidth() / 2,
image.getTop() + image.getHeight() / 2,
0,
button.getWidth());
image.setVisibility(View.INVISIBLE);
button.setVisibility(View.VISIBLE);
animator.start();
}
});
}
到目前为止一切正常。接下来我想要做反转的圆形显示动画 - 基本上我刚刚创建的相同的动画反转,以便在它结束时我会有我的小圆圈和按钮就会消失。
任何人都可以给我一些提示我怎么能这样做?
答案 0 :(得分:3)
我已经尝试过一些方法来解决你的问题希望它可以帮助你。
image.setOnClickListener(new ImageView.OnClickListener() {
@Override
public void onClick(View v) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
revealShow(button, true);
}
}
});
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
revealShow(image, false);
}
}
});
//这是revealShow方法,您可以根据需要更改动画持续时间。
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
private void revealShow(View view, boolean isExpand) {
int w = view.getWidth();
int h = view.getHeight();
int endRadius = (int) Math.hypot(w, h);
int cx = (int) (image.getX() + (image.getWidth() / 2));
int cy = (int) (image.getY() + (image.getHeight() / 2));
if (isExpand) {
Animator revealAnimator = ViewAnimationUtils.createCircularReveal(fragments_container, cx, cy, 0, endRadius);
image.setVisibility(View.INVISIBLE);
button.setVisibility(View.VISIBLE);
revealAnimator.setDuration(500);
revealAnimator.start();
} else {
Animator anim =
ViewAnimationUtils.createCircularReveal(fragments_container, cx, cy, endRadius, image.getWidth() / 2);
anim.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
super.onAnimationEnd(animation);
image.setVisibility(View.VISIBLE);
button.setVisibility(View.INVISIBLE);
}
});
anim.setDuration(500);
anim.start();
}
}