防止我的 Android 应用程序的多个实例由单个活动组成 [英] Prevent multiple instances of my Android application composed of a single activity

问题描述

我有一个由单个 Activity 组成的 Android 应用程序.我如何确保在给定时间内只存在我的应用程序的一个实例(== Activity)?我遇到了一种情况，我通过多次单击应用程序图标成功打开了我的应用程序的多个实例(这不会一直重现).

I have an Android application which is composed from a single Activity. How can I assure that only one instance of my application (== Activity) will exist in a given time? I got to a situation in which I succeeded to open multiple instances of my app by clicking on the app icon multiple times (this doesn't reproduce all the time).

推荐答案

像这样改变你的清单:

    <activity
        android:name="com.yourpackage.YourActivity"
        android:label="@string/app_name"
        android:launchMode="singleTask" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

包含 android:launchMode="singleTask" 并且不可能同时启动多个 Activity 实例.查看活动文档了解更多信息.

include the android:launchMode="singleTask" and it will not be possible to have multiple instances of your Activity launched at the same time. See the activity docs for more.

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