我想有一个活动的其中将包括在右上角关闭活动关闭按钮，即X。任何对此的例子将是非常有益的。

I would like to have an activity which would consist of a close button i.e 'x' at the right top corner closing the activity. Any examples on this will be very much helpful.

推荐答案

作出活动透明主题清单如下：

make an Activity with Transparent theme in manifest like this:

<activity android:name=".MyDialogActivity" android:theme="@style/Theme.Transparent" />

再这样定义布局：

and then define layout like this:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent" android:layout_height="fill_parent">
    <RelativeLayout android:orientation="vertical"
        android:layout_width="fill_parent" android:layout_height="fill_parent"
        android:layout_margin="15dp" android:padding="2dp">
        <!-- Contents will go here..-->
    </RelativeLayout>
    <Button android:layout_alignParentRight="true" android:text="X"
        android:textColor="#FFF" android:background="@drawable/round_button_background"
        android:gravity="center_vertical|center_horizontal"
        android:layout_margin="5dp" android:layout_height="25dp"
        android:layout_width="25dp" android:textSize="12sp" android:textStyle="bold"
        android:onClick="cancelActivity" />
</RelativeLayout>

和定义背景为你的亲密在绘制这样的一个按钮：

and define a background for your close Button in drawable like this:

round_button_background.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
        android:shape="oval">
    <solid android:color="#9F2200" />
    <stroke android:width="2dp" android:color="#FFF" />
</shape>