嗯，我搜索了很多，但我没有找到一个precise回答如何导出一个活动，这样一个应用程序可以启动它 startActivityforResult 。

Well I searched a lot, but I didn't find a precise answer how to export an Activity, so an app can start it with startActivityforResult.

我如何做到这一点？我一定要改变体现在某些方面？

How do I achieve that? Do I have to change the Manifest in some ways?

推荐答案

您需要在您的舱单申报意向过滤器（我从下面的例子吧code扫描仪）：

You need to declare an intent-filter in your Manifest (I took the following example from Barcode Scanner) :

<activity android:name="...">
    <intent-filter>
        <action android:name="com.google.zxing.client.android.SCAN" />
        <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>
</activity>

然后创建一个相同的动作字符串意图：

Then create an intent with the same action string :

Intent intent = new Intent("com.google.zxing.client.android.SCAN");
startActivityForResult(intent, code);

Android的应该开始你的活动（或者它会显示一个下拉框，如果有多个应用程序共享相同的操作字符串）。

Android should start your activity (or it will show a drop-down box if there are multiple apps sharing the same action string).