使用PropertyAnimations时的奇怪行为或者这是一个功能吗?

时间:2014-03-25 16:15:40

标签: android animation android-animation behavior

我在搞PropertyAnimations。为此,我有一个简单(但冗长)的设置来玩。通过按钮点击,Views上有两个y-Axis切换位置。在进行此转换时,通过缩放视图,一个View将变得更小而另一个更大。

好的,这有效!但我发现了一个令我惊讶的奇怪行为。如果我在其他两个View已经存在的布局中添加了额外的View,动画将改变它的行为!

不再有正常的y-Axis翻译,动画现在会将Views翻译成一个圆圈,也就是x-Axis我想知道为什么添加一个简单的视图来改变整个动画?

我想我无法更好地描述它,所以这是我完整的设置来重现问题。只需在第一次按下按钮后删除高度为1dp的视图,您将看到。

这是我的视图布局:

<LinearLayout 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:orientation="vertical"
    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="com.example.inputtest.MainActivity$PlaceholderFragment" >

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical"
        android:orientation="vertical">

        <TextView
               android:id="@+id/origin"
               android:layout_width="match_parent"
               android:layout_height="wrap_content"
               android:paddingLeft="20dp"
               android:paddingRight="20dp"
               android:text="FOO"/>

        <View 
            android:layout_width="wrap_content"
            android:layout_height="1dp"
            android:layout_marginTop="20dp"
            android:layout_marginBottom="20dp"
            android:background="#000000"/>

        <TextView
               android:id="@+id/destination"
               android:layout_width="match_parent"
               android:layout_height="wrap_content"
               android:paddingLeft="20dp"
               android:paddingRight="20dp"
               android:text="BAR"/>

    </LinearLayout>
    <Button
        android:id="@+id/switcher"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical"
        android:text="Switch"/>

</LinearLayout>

这是基本的开始活动:

public class MainActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        if (savedInstanceState == null) {
            getSupportFragmentManager().beginTransaction()
                    .add(R.id.container, new PlaceholderFragment()).commit();
        }
    }

    public static class PlaceholderFragment extends Fragment {

        public PlaceholderFragment() {}

        TextView foo;
        TextView bar;

        @Override
        public View onCreateView(LayoutInflater inflater,
                ViewGroup container,
                Bundle savedInstanceState) {
            View rootView = inflater.inflate(R.layout.fragment_main, container,
                    false);

            foo = (TextView)rootView.findViewById(R.id.origin);
            bar = (TextView)rootView.findViewById(R.id.destination);

            Button btn = (Button)rootView.findViewById(R.id.switcher);
            btn.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {
                    AnimatorSet scale1 = null;
                    AnimatorSet scale2 = null;
                    ObjectAnimator translate1 = null;
                    ObjectAnimator translate2 = null;

                    if (foo.getTranslationY() == 0) {
                        translate1 = ObjectAnimator.ofFloat(foo, "translationY", bar.getTop());
                        translate2 = ObjectAnimator.ofFloat(bar, "translationY", bar.getTop()*(-1));
                        scale1 = (AnimatorSet)AnimatorInflater.loadAnimator(getActivity(), R.animator.scaler);
                        scale2 = (AnimatorSet)AnimatorInflater.loadAnimator(getActivity(), R.animator.scaler2);
                    } else {
                        translate1 = ObjectAnimator.ofFloat(foo, "translationY", 0);
                        translate2 = ObjectAnimator.ofFloat(bar, "translationY", 0);
                        scale1 = (AnimatorSet)AnimatorInflater.loadAnimator(getActivity(), R.animator.scaler2);
                        scale2 = (AnimatorSet)AnimatorInflater.loadAnimator(getActivity(), R.animator.scaler);
                    }

                    translate1.setDuration(500L);
                    translate2.setDuration(500L);

                    scale1.setTarget(foo);
                    scale2.setTarget(bar);

                    AnimatorSet set = new AnimatorSet();
                    set.playTogether(scale1, scale2, translate1, translate2);
                    set.start();
                }
            });
            return rootView;
        }
    }
}

动画的scaler.xml:

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" 
    android:ordering="sequentially">

    <set 
        android:ordering="together">

        <objectAnimator
            android:propertyName="scaleX"
            android:duration="250"
            android:valueTo="2.0"/>

        <objectAnimator
            android:propertyName="scaleY"
            android:duration="250"
            android:valueTo="2.0"/>

    </set>

    <set 
        android:ordering="together">

        <objectAnimator
            android:propertyName="scaleX"
            android:duration="250"
            android:valueTo="1.0"/>

        <objectAnimator
            android:propertyName="scaleY"
            android:duration="250"
            android:valueTo="1.0"/>
   </set>
</set>

动画的scaler2.xml:

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" 
    android:ordering="sequentially">

    <set 
        android:ordering="together">

        <objectAnimator
            android:propertyName="scaleX"
            android:duration="250"
            android:valueTo="0.5"/>

        <objectAnimator
            android:propertyName="scaleY"
            android:duration="250"
            android:valueTo="0.5"/>
    </set>

    <set 
        android:ordering="together">

    <objectAnimator
            android:propertyName="scaleX"
            android:duration="250"
            android:valueTo="1.0"/>

        <objectAnimator
            android:propertyName="scaleY"
            android:duration="250"
            android:valueTo="1.0"/>
   </set>
</set>

1 个答案:

答案 0 :(得分:1)

我玩了一下,找到了解决方案:)对我来说,圆形动画甚至出现时只有2个视图,所以我认为它与它无关,首先我认为它是'布局限制,我将它改为RelativeLayout,没有区别......原因是你的缩放系数为0.5和2.0!视图宽度加倍并减半,因此看起来内容正在移动,但它只是缩放。如果始终将scaleX属性更改为1.0f,则只会看到y转换。

我建议在代码或xml中创建所有动画,这看起来有点凌乱:)而我在这里写的内容可能很有趣...... https://stackoverflow.com/a/22635237/2001247