<?xml version="1.0" encoding="utf-8"?> 
<set xmlns:android="http://schemas.android.com/apk/res/android" > 
<translate 
    android:duration="500" 
    android:fromXDelta="0" 
    android:fromYDelta="1000" 
    android:toXDelta="0" 
    android:toYDelta="0" /> 
</set> 

<?xml version="1.0" encoding="utf-8"?> 
<set xmlns:android="http://schemas.android.com/apk/res/android" > 
<translate 
    android:duration="500" 
    android:fromXDelta="0" 
    android:fromYDelta="0" 
    android:toXDelta="0" 
    android:toYDelta="1000" /> 
</set> 

<style name="main_menu_animstyle"> 
    <item name="android:windowEnterAnimation">@anim/settingswindow_in_anim</item> 
    <item name="android:windowExitAnimation">@anim/settingswindow_out_anim</item> 
  </style> 

Window window = dialog.getWindow(); 
//设置显示动画 
window.setWindowAnimations(R.style.main_menu_animstyle); 
WindowManager.LayoutParams wl = window.getAttributes(); 
wl.x = 0; 
wl.y = getWindowManager().getDefaultDisplay().getHeight(); 
//设置显示位置 
dialog.onWindowAttributesChanged(wl);//设置点击外围解散 
dialog.setCanceledOnTouchOutside(true); 
dialog.show();