如何在 Android 中使用顶部角落的关闭按钮进行活动? [英] How to have activity in Android with a close button at the top corner?

问题描述

我想要一个活动，其中包含一个关闭按钮，即右上角的x"来关闭活动.任何关于此的示例都会非常有帮助.

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

在 manifest 中创建一个 Activity 和 Transparent 主题，如下所示:

make an Activity with Transparent theme in manifest like this:

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

然后像这样定义布局:

<?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>

并在 drawable 中为您的关闭 Button 定义背景，如下所示:

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>

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