1 import android.app.Activity; 2 import android.app.Fragment; 3 import android.os.Bundle; 4 import android.view.LayoutInflater; 5 import android.view.View; 6 import android.view.ViewGroup; 7 import android.view.animation.LayoutAnimationController; 8 import android.view.animation.ScaleAnimation; 9 import android.widget.LinearLayout;10 11 public class MainActivity extends Activity {12 13     @Override14     protected void onCreate(Bundle savedInstanceState) {15         super.onCreate(savedInstanceState);16         setContentView(R.layout.activity_main);17 18         if (savedInstanceState == null) {19             getFragmentManager().beginTransaction()20                     .add(R.id.container, new PlaceholderFragment()).commit();21         }22     }23 25     public static class PlaceholderFragment extends Fragment {26 27         public PlaceholderFragment() {28         }29 30         @Override31         public View onCreateView(LayoutInflater inflater, ViewGroup container,32                 Bundle savedInstanceState) {33             34             final LinearLayout rootView = (LinearLayout) inflater.inflate(35                     R.layout.fragment_main, container, false);36 37             /**38              *  ***  ScaleAnimation 缩放动画效果  ***  39              * float fromX 动画起始时 X坐标上的伸缩尺寸。40              * float toX 动画结束时 X坐标上的伸缩尺寸。41              * float fromY 动画起始时Y坐标上的伸缩尺寸。 42              * float toY 动画结束时Y坐标上的伸缩尺寸。 43              */44             ScaleAnimation sa = new ScaleAnimation(0, 1, 0, 1);45             sa.setDuration(5000); // 5秒 设置持续时间46 47             /**48              * LayoutAnimationController 控制一组控件按照规定显示.49              * delay 推迟。50              */51             LayoutAnimationController lac = new LayoutAnimationController(sa,52                     0.5f);53               54             /**55              * LayoutAnimationController.ORDER_NORMAL    顺序显示56              * LayoutAnimationController.ORDER_REVERSE   反显示(从下往上)57              * LayoutAnimationController.ORDER_RANDOM    随机显示58              */59             lac.setOrder(LayoutAnimationController.ORDER_REVERSE);60 61             rootView.setLayoutAnimation(lac);62 63             return rootView;64         }65     }66 67 }

1 <FrameLayout   xmlns:android="http://schemas.android.com/apk/res/android"2     xmlns:tools="http://schemas.android.com/tools"3     android:id="@+id/container"4     android:layout_width="match_parent"5     android:layout_height="match_parent" />

 1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 2     xmlns:tools="http://schemas.android.com/tools" 3     android:layout_width="match_parent" 4     android:layout_height="match_parent" 5     android:orientation="vertical" 6     tools:context="com.jikexueyuan.layoutanimationinlinearlayout.MainActivity$PlaceholderFragment" > 7  8     <Button 9         android:id="@+id/Button05"10         android:layout_width="wrap_content"11         android:layout_height="wrap_content"12         android:text="Button" />13 14     <Button15         android:id="@+id/Button04"16         android:layout_width="wrap_content"17         android:layout_height="wrap_content"18         android:text="Button" />19 20     <Button21         android:id="@+id/Button03"22         android:layout_width="wrap_content"23         android:layout_height="wrap_content"24         android:text="Button" />25 26     <Button27         android:id="@+id/Button02"28         android:layout_width="wrap_content"29         android:layout_height="wrap_content"30         android:text="Button" />31 32     <Button33         android:id="@+id/Button01"34         android:layout_width="wrap_content"35         android:layout_height="wrap_content"36         android:text="Button" />37 38     <Button39         android:id="@+id/button1"40         android:layout_width="wrap_content"41         android:layout_height="wrap_content"42         android:text="Button" />43 44 </LinearLayout>