今天老師留的作業,使用倆個Fragment來實作3D翻轉效果,遇到了一點點的問題,于是在網上進行了查找,但是發現有些部落客的代碼不正确,對其他人進行了誤導,在網上使用屬性動畫實作3D效果非常少,是以經過我自己的實驗摸索,我将自己的代碼和遇到的問題給他講解一下提供一點點借鑒,并且希望可以幫助到大家。
首先講解一下主要實作動畫的函數:
getFragmentManager().beginTransaction()
.setCustomAnimations(R.animator.fragment_second_3d_reversal_enter,R.animator.fragment_second_3d_reversal_exit)
.replace(R.id.container, new MainFragment()).commit();
我想信這個函數大家在實作動畫時都會使用到,先獲得FragmentManager然後進行transaction,主要添加動畫的函數是setCustomAnimations(),在網上可以查到的解釋,對這個方法有些錯誤,描述的是目前的Fragment對象的進入和退出時的動畫效果,是這個對象的一種屬性,但是這個方法真正的解釋應該是在目前Activity在切換Fragment時所執行的動畫方式,也就是說目前Fragment退出時用的是方法中的退出動畫,新的Fragment進入時執行的是進入的動畫效果,可以了解為這一次動畫效果完全是利用這一個語句來完成,有些部落格的記載對我們産生了一些誤導。
官方的注釋如下:
/**
* Set specific animation resources to run for the fragments that are
* entering and exiting in this transaction. These animations will not be
* played when popping the back stack.
*/
public abstract FragmentTransaction setCustomAnimations(int enter, int exit);
整體的3d翻轉效果代碼如下:
第二個Fragment,
/**
* Created by Liurs on 2016/6/14.
**/
public class SecondFragment extends Fragment {
private LinearLayout root;
private Button mButton;
public SecondFragment() {
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
root = (LinearLayout) inflater.inflate(R.layout.fragment_second, container, false);
//Set listener;
setListener();
return root;
}
/**
* set listener
*/
private void setListener() {
mButton = (Button) root.findViewById(R.id.button);
mButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
getFragmentManager().beginTransaction()
.setCustomAnimations(R.animator.fragment_second_3d_reversal_enter,R.animator.fragment_second_3d_reversal_exit)
.replace(R.id.container, new MainFragment()).commit();
}
});
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
}
}
第一個Fragment,
/**
* Created by Liurs on 2016/6/14.
**/
public class MainFragment extends Fragment {
private LinearLayout root;
private Button mButton;
public MainFragment() {
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
root = (LinearLayout) inflater.inflate(R.layout.content_main, container, false);
//Set listener;
setListener();
return root;
}
/**
* set listener
*/
private void setListener() {
mButton = (Button) root.findViewById(R.id.button);
mButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
getFragmentManager()
.beginTransaction()
.addToBackStack(null)
.setCustomAnimations(R.animator.fragment_3d_reversal_enter,R.animator.fragment_3d_reversal_exit,R.animator.fragment_second_3d_reversal_enter,R.animator.fragment_second_3d_reversal_exit)
.replace(R.id.container, new SecondFragment())
.commit();
}
});
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
}
}
逆時針翻轉動畫進入時配置檔案,
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" android:ordering="sequentially">
<objectAnimator
android:duration="0"
android:propertyName="rotationY"
android:valueFrom="0f"
android:valueTo="270f" />
<objectAnimator
android:duration="500"
android:propertyName="rotationY"
android:startOffset="500"
android:valueFrom="270f"
android:valueTo="360f" />
</set>
退出時動畫配置檔案,
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" android:ordering="sequentially">
<objectAnimator xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="500"
android:propertyName="rotationY"
android:valueFrom="0f"
android:valueTo="90f">
</objectAnimator>
</set>
順時針翻轉動畫進入時配置檔案,
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:ordering="sequentially">
<objectAnimator
android:duration="0"
android:propertyName="rotationY"
android:valueFrom="180f"
android:valueTo="90f" />
<objectAnimator
android:duration="500"
android:propertyName="rotationY"
android:startOffset="500"
android:valueFrom="90f"
android:valueTo="0f" />
</set>
退出時動畫配置檔案,
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" android:ordering="sequentially">
<objectAnimator xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="500"
android:propertyName="rotationY"
android:valueFrom="0f"
android:valueTo="-90f">
</objectAnimator>
</set>
至此,兩個Fragment的3D翻轉切換已經完成,希望我的經驗可以幫助到你們