private LayoutInflater layoutInflater;
private PopupWindow popupAvatarWindow;

private void showAvatarPopupWindow() {
    if (layoutInflater == null) {
        layoutInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }
    View popView = layoutInflater.inflate(
            R.layout.popwindow_photograph_album
 
, null);
    //拍照
TextView takePicturesTv = (TextView) popView.findViewById(R.id.take_pictures_avatar);
    takePicturesTv.setOnClickListener(this);
    //從相簿中選擇
TextView chooseAlbumTv = (TextView) popView.findViewById(R.id.upload_album_avatar);
    chooseAlbumTv.setOnClickListener(this);
    //取消
TextView cancalOperateTv = (TextView) popView.findViewById(R.id.cancal_operate
 
);
    cancalOperateTv.setOnClickListener(this);
    //LinearLayout   WindowManager.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.WRAP_CONTENT
if (popupAvatarWindow == null) {
        popupAvatarWindow = new PopupWindow(popView, WindowManager.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.MATCH_PARENT
 
);
    }
    popupAvatarWindow.setFocusable(true);
    popupAvatarWindow.setOutsideTouchable(true);
//設定背景
    popupAvatarWindow.setBackgroundDrawable(getResources().getDrawable(R.color.gray_b0000000));
    popupAvatarWindow.showAtLocation(personalSettingsLayout, Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL, 0, 0);

}

<!-- popwindow_photograph_album -->

<?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:orientation="vertical">
    <!--   android:layout_marginLeft="60dp"
        android:layout_marginRight="60dp" -->
<LinearLayout
android:id="@+id/cancel_layout"
android:layout_width="match_parent"
android:layout_height="44dp"
android:layout_alignParentBottom="true"
android:layout_marginLeft="60dp"
android:layout_marginRight="60dp"
android:layout_marginTop="10dp"
android:background="@drawable/round_white_bg"
android:orientation="vertical">

        <TextView
android:id="@+id/cancal_operate"
style="@style/dialog_textview_size16_dark544646"
android:layout_width="match_parent"
android:layout_height="44dp"
android:layout_gravity="center"
android:gravity="center"
android:text="取消" />

    </LinearLayout>

    <LinearLayout
android:id="@+id/phote_album_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="@+id/cancel_layout"
android:layout_marginLeft="60dp"
android:layout_marginRight="60dp"
android:background="@drawable/round_white_bg"
android:orientation="vertical">

        <TextView
android:id="@+id/take_pictures_avatar"
style="@style/dialog_textview_size16_blue07b2f7"
android:layout_width="match_parent"
android:layout_height="44dp"
android:layout_gravity="center"
android:gravity="center"
android:text="拍照" />

        <View
android:layout_width="match_parent"
android:layout_height="1px"
android:background="@color/CCCCCC" />

        <TextView
android:id="@+id/upload_album_avatar"
style="@style/dialog_textview_size16_blue07b2f7"
android:layout_width="match_parent"
android:layout_height="44dp"
android:layout_gravity="center"
android:gravity="center"
android:text="從相簿上傳" />

    </LinearLayout>


</RelativeLayout>