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);

三、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.setInterp

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olator(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”