final PopupWindow window = mPageStatWin;
if(null != window && window.isShowing()) {
    win.dismiss();
}

window.showAtLocation(parent, Gravity.RIGHT | Gravity.BOTTOM, 10,10);

//将PopupWindow作为anchor的下拉窗口显示。即在anchor的左下角显示
window.showAsDropDown(anchor);
//xoff,yoff基于anchor的左下角进行偏移。
window.showAsDropDown(anchor, xoff, yoff);

//创建一个包含自定义view的PopupWindow
private PopupWindow makePopupWindow(Context cx) {
    PopupWindow window;
    window = new PopupWindow(cx);
    TextView contentView = new TextView(cx);
    contentView.setGravity(Gravity.CENTER);
    final Resources res = cx.getResources();
    // contentView.setBackgroundColor(R.color.page_window_bgcolor);
    // window.setBackgroundDrawable(new
    // ColorDrawable(res.getColor(R.color.page_window_bgcolor)));
    contentView.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,
            LayoutParams.WRAP_CONTENT));
    //设置PopupWindow显示和隐藏时的动画
    window.setAnimationStyle(R.style.AnimationFade);
    //设置PopupWindow的大小（宽度和高度）
    window.setWidth(res.getDimensionPixelSize(R.dimen.page_window_width));
    window.setHeight(res.getDimensionPixelSize(R.dimen.page_window_height));
    //设置PopupWindow的内容view
    window.setContentView(contentView);
        //设置PopupWindow外部区域是否可触摸
        window.setOutsideTouchable(true);
    return window;
}

<!-- PopupWindow窗口淡入淡出动画 -->
<style name="AnimationFade">
    <item name="android:windowEnterAnimation">@anim/fade_in</item>
    <item name="android:windowExitAnimation">@anim/fade_out</item>
</style>

window.setAnimationStyle(R.style.AnimationFade);

window.setFocusable(true); //设置PopupWindow可获得焦点
window.setTouchable(true); //设置PopupWindow可触摸
window.setOutsideTouchable(true); //设置非PopupWindow区域可触摸

window.showAtLocation();
window.showAsDropDown();