［积累 https://github.com/yayaa/Rotatable]
[转载 http://www.jianshu.com/p/7db8425e84fc]
749674-89be3fa5b7608647.gif
- 首页
首页由正面和背面两张卡片组成, 同时, 设置点击事件flipCard.
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
android:id="@+id/main_fl_container"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:onClick="flipCard"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="me.chunyu.spike.wcl_flip_anim_demo.MainActivity">
<include
layout="@layout/cell_card_back"/>
<include
layout="@layout/cell_card_front"/>
</FrameLayout>
逻辑, 初始化动画和镜头距离.
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.bind(this);
setAnimators(); // 设置动画
setCameraDistance(); // 设置镜头距离
}
逻辑, 初始化动画和镜头距离.
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.bind(this);
setAnimators(); // 设置动画
setCameraDistance(); // 设置镜头距离
}
- 动画
初始化右出(RightOut)和左入(LeftIn)动画, 使用动画集合AnimatorSet.
当右出动画开始时, 点击事件无效, 当左入动画结束时, 点击事件恢复.
// 设置动画
private void setAnimators() {
mRightOutSet = (AnimatorSet) AnimatorInflater.loadAnimator(this, R.animator.anim_out);
mLeftInSet = (AnimatorSet) AnimatorInflater.loadAnimator(this, R.animator.anim_in);
// 设置点击事件
mRightOutSet.addListener(new AnimatorListenerAdapter() {
@Override public void onAnimationStart(Animator animation) {
super.onAnimationStart(animation);
mFlContainer.setClickable(false);
}
});
mLeftInSet.addListener(new AnimatorListenerAdapter() {
@Override public void onAnimationEnd(Animator animation) {
super.onAnimationEnd(animation);
mFlContainer.setClickable(true);
}
});
}
右出动画
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<!--旋转-->
<objectAnimator
android:duration="@integer/anim_length"
android:propertyName="rotationY"
android:valueFrom="0"
android:valueTo="180"/>
<!--消失-->
<objectAnimator
android:duration="0"
android:propertyName="alpha"
android:startOffset="@integer/anim_half_length"
android:valueFrom="1.0"
android:valueTo="0.0"/>
</set>
旋转180°, 当旋转一半时, 卡片消失.
左入动画
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<!--消失-->
<objectAnimator
android:duration="0"
android:propertyName="alpha"
android:valueFrom="1.0"
android:valueTo="0.0"/>
<!--旋转-->
<objectAnimator
android:duration="@integer/anim_length"
android:propertyName="rotationY"
android:valueFrom="-180"
android:valueTo="0"/>
<!--出现-->
<objectAnimator
android:duration="0"
android:propertyName="alpha"
android:startOffset="@integer/anim_half_length"
android:valueFrom="0.0"
android:valueTo="1.0"/>
</set>
在开始时是隐藏, 逆向旋转, 当旋转一半时, 显示卡片.
- 镜头视角
改变视角, 涉及到旋转卡片的Y轴, 即rotationY, 需要修改视角距离.
如果不修改, 则会超出屏幕高度, 影响视觉体验.
// 改变视角距离, 贴近屏幕
private void setCameraDistance() {
int distance = 16000;
float scale = getResources().getDisplayMetrics().density * distance;
mFlCardFront.setCameraDistance(scale);
mFlCardBack.setCameraDistance(scale);
}
- 旋转控制
设置右出和左入动画的目标控件, 两个动画同步进行, 并区分正反面朝上.
// 翻转卡片
public void flipCard(View view) {
// 正面朝上
if (!mIsShowBack) {
mRightOutSet.setTarget(mFlCardFront);
mLeftInSet.setTarget(mFlCardBack);
mRightOutSet.start();
mLeftInSet.start();
mIsShowBack = true;
} else { // 背面朝上
mRightOutSet.setTarget(mFlCardBack);
mLeftInSet.setTarget(mFlCardFront);
mRightOutSet.start();
mLeftInSet.start();
mIsShowBack = false;
}
}
