Android翻转动画（卡片翻转效果）

需求

屏幕右滑事件触发卡片的翻转效果 ，为了方便，在例子中将右滑事件改成按钮点击事件

老规矩最后有源码

NO.1

先介绍三个插值器

• LinearInterpolator() 其变化速率恒定
• AccelerateInterpolator() 其变化开始速率较慢，后面加速
• DecelerateInterpolator() 其变化开始速率较快，后面减速

NO.2

实现步骤

1.效果图

2.布局

一个按钮，两个TextView（布局文件在源码部分）

3.逻辑判断（是否隐藏）

        final TextView visibletext;        final TextView invisibletext;        //逻辑判断        if (textview1.getVisibility() == View.GONE) {            visibletext = textview2;            invisibletext = textview1;        } else {            invisibletext = textview2;            visibletext = textview1;        }

4.翻转动画

 //LinearInterpolator()     其变化速率恒定        ObjectAnimator visToInvis = ObjectAnimator.ofFloat(visibletext, "rotationY", 0f, 90f);        visToInvis.setDuration(500);        //AccelerateInterpolator()    其变化开始速率较慢，后面加速        visToInvis.setInterpolator(new AccelerateInterpolator());        final ObjectAnimator invisToVis = ObjectAnimator.ofFloat(invisibletext, "rotationY",                -90f, 0f);        invisToVis.setDuration(500);        //DecelerateInterpolator()   其变化开始速率较快，后面减速        invisToVis.setInterpolator(new DecelerateInterpolator());        visToInvis.addListener(new AnimatorListenerAdapter() {            @Override            public void onAnimationEnd(Animator anim) {                visibletext.setVisibility(View.GONE);                invisToVis.start();                invisibletext.setVisibility(View.VISIBLE);            }        });        visToInvis.start();

5.bug出现

发现实现后，第一次点击出现bug

6.bug解决

在找到控件后，默认设置y方向角度

textview2.setRotationY(-90f);

NO.3

源码

MainActivity.java

public class MainActivity extends Activity {
    private TextView textview1;    private TextView textview2;    private Button button;
    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initView();        //bug解决        textview2.setRotationY(-90f);        button.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                flipAnimation();            }        });    }
    private void initView() {        textview1 = (TextView) findViewById(R.id.textview1);        textview2 = (TextView) findViewById(R.id.textview2);        button = (Button) findViewById(R.id.button);    }
    private void flipAnimation() {        final TextView visibletext;        final TextView invisibletext;        //逻辑判断        if (textview1.getVisibility() == View.GONE) {            visibletext = textview2;            invisibletext = textview1;        } else {            invisibletext = textview2;            visibletext = textview1;        }        //LinearInterpolator()     其变化速率恒定        ObjectAnimator visToInvis = ObjectAnimator.ofFloat(visibletext, "rotationY", 0f, 90f);        visToInvis.setDuration(500);        //AccelerateInterpolator()    其变化开始速率较慢，后面加速        visToInvis.setInterpolator(new AccelerateInterpolator());        final ObjectAnimator invisToVis = ObjectAnimator.ofFloat(invisibletext, "rotationY",                -90f, 0f);        invisToVis.setDuration(500);        //DecelerateInterpolator()   其变化开始速率较快，后面减速        invisToVis.setInterpolator(new DecelerateInterpolator());        visToInvis.addListener(new AnimatorListenerAdapter() {            @Override            public void onAnimationEnd(Animator anim) {                visibletext.setVisibility(View.GONE);                invisToVis.start();                invisibletext.setVisibility(View.VISIBLE);            }        });        visToInvis.start();    }

}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context=".MainActivity">
<TextView    android:layout_width="200dp"    android:layout_height="200dp"    android:background="#35B9F4"    android:id="@+id/textview1"    android:layout_centerInParent="true"    /><TextView    android:layout_width="200dp"    android:layout_height="200dp"    android:background="#03DAC5"    android:layout_centerInParent="true"    android:id="@+id/textview2"/>
<Button    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_alignParentBottom="true"    android:layout_centerHorizontal="true"    android:id="@+id/button"    android:text="点击翻转"/></RelativeLayout>