简单展开菜单

效果图：

建布局文件：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout  xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#eeeeee" android:orientation="horizontal" android:gravity="center" >

    <View  android:id="@+id/vTop" android:layout_width="40dp" android:layout_height="40dp" android:background="@color/coral" />
    <View  android:id="@+id/vBottom" android:layout_width="40dp" android:layout_height="40dp" android:background="@color/deeppink" />
    <View  android:id="@+id/vLeft" android:layout_width="40dp" android:layout_height="40dp" android:background="@color/green" />
    <View  android:id="@+id/vRight" android:layout_width="40dp" android:layout_height="40dp" android:background="@color/red" />
    <View  android:id="@+id/vCenter" android:layout_width="40dp" android:layout_height="40dp" android:background="@color/blue" />
</RelativeLayout>

点击是开启动画：

private void startAnim(){
        //透明度  旋转  平移
        ObjectAnimator animator0=ObjectAnimator.ofFloat(vCenter,"alpha",1f,0.5f);
        ObjectAnimator animator1=ObjectAnimator.ofFloat(vTop,"translationY",-300f);
        ObjectAnimator animator5=ObjectAnimator.ofFloat(vTop,"rotation",0,360);
        ObjectAnimator animator2=ObjectAnimator.ofFloat(vBottom,"translationY",300f);
        ObjectAnimator animator6=ObjectAnimator.ofFloat(vBottom,"rotation",0,360);
        ObjectAnimator animator3=ObjectAnimator.ofFloat(vLeft,"translationX",-300f);
        ObjectAnimator animator7=ObjectAnimator.ofFloat(vLeft,"rotation",0,360);
        ObjectAnimator animator4=ObjectAnimator.ofFloat(vRight,"translationX",300f);
        ObjectAnimator animator8=ObjectAnimator.ofFloat(vRight,"rotation",0,360);
        AnimatorSet set=new AnimatorSet();
        set.setDuration(800);
        set.playTogether(animator0, animator1, animator2, animator3, animator4,animator5,animator6,animator7,animator8);
        set.start();
    }

再次点击关闭:

private void closeAnim(){
        ObjectAnimator animator0=ObjectAnimator.ofFloat(vCenter,"alpha",0.5f,1f);
        ObjectAnimator animator1=ObjectAnimator.ofFloat(vTop,"translationY",0f);
        ObjectAnimator animator5=ObjectAnimator.ofFloat(vTop,"rotation",0,360);
        ObjectAnimator animator2=ObjectAnimator.ofFloat(vBottom,"translationY",0f);
        ObjectAnimator animator6=ObjectAnimator.ofFloat(vBottom,"rotation",0,360);
        ObjectAnimator animator3=ObjectAnimator.ofFloat(vLeft,"translationX",0f);
        ObjectAnimator animator7=ObjectAnimator.ofFloat(vLeft,"rotation",0,360);
        ObjectAnimator animator4=ObjectAnimator.ofFloat(vRight,"translationX",0f);
        ObjectAnimator animator8=ObjectAnimator.ofFloat(vRight,"rotation",0,360);
        AnimatorSet set=new AnimatorSet();
        set.setDuration(800);
        set.playTogether(animator0, animator1, animator2, animator3, animator4,animator5,animator6,animator7,animator8);
        set.start();

    }