android 自定义Dialog 样式和位置

Dialog dialog = new Dialog(context, R.style.MyDialog);
Window window = dialog.getWindow();
LayoutParams params = new LayoutParams();
params.x = (int)v.getX();
params.y = (int)v.getY();
window.setAttributes(params);
dialog.setContentView(inflater.inflate(R.layout.dialog, null));
dialog.setCanceledOnTouchOutside(true);
dialog.show();

<style name="MyDialog" parent="android:Theme.Dialog">
<item name="android:windowAnimationStyle">@style/AnimTop2</item>
<item name="android:windowFrame">@null</item> <!-- 边框 -->
<item name="android:windowIsFloating">true</item> <!-- 是否浮现在activity之上 -->
<item name="android:windowIsTranslucent">true</item> <!-- 半透明 -->
<item name="android:windowNoTitle">true</item> <!-- 无标题 -->
<item name="android:windowBackground">@android:color/transparent</item> <!-- 背景透明 -->
<item name="android:backgroundDimEnabled">false</item> <!-- 模糊 -->
</style>