我想看到球员的名单我的应用程序（用继续行动......），弹出当我尝试（从文件浏览器或Gmail附件即。）打开一个音频文件。 下面是意图过滤器我试过我的MainActivity：

I'd like to see my app in the list of player ("continue action using...") that pops up when I try to open an audio file (ie. from file browser or gmail attachment). Here are the intent filters I've tried for my MainActivity:

    <intent-filter>
        <action android:name="android.intent.action.MAIN" />

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

    <intent-filter>
        <action android:name="android.intent.action.SEARCH" />
    </intent-filter>

    <intent-filter>
        <action android:name="android.intent.action.MUSIC_PLAYER" />
    </intent-filter>

    <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.CATEGORY_APP_MUSIC" />
    </intent-filter>

    <intent-filter>
        <action android:name="android.intent.action.VIEW" />
        <data android:mimeType="audio/mpeg" />
    </intent-filter>

感谢您的帮助！

thanks for your help !

推荐答案

您总是需要一个＆LT;类别＆GT; 上的＆LT;活性GT; ＆LT;意向滤光器＆gt; ，因为总会有至少一个类别上的意图与 startActivity使用（）。

You always need a <category> on an <activity> <intent-filter>, as there is always at least one category on the Intent used with startActivity().

下面是的AOSP音乐应用uses:

        <intent-filter>
            <action android:name="android.intent.action.VIEW" />
            <category android:name="android.intent.category.DEFAULT" />
            <data android:scheme="file"/>
            <data android:mimeType="audio/*"/>
            <data android:mimeType="application/ogg"/>
            <data android:mimeType="application/x-ogg"/>
            <data android:mimeType="application/itunes"/>
        </intent-filter>
        <intent-filter>
            <action android:name="android.intent.action.VIEW" />
            <category android:name="android.intent.category.DEFAULT" />
            <category android:name="android.intent.category.BROWSABLE" />
            <data android:scheme="http" />
            <data android:mimeType="audio/*"/>
            <data android:mimeType="application/ogg"/>
            <data android:mimeType="application/x-ogg"/>
            <data android:mimeType="application/itunes"/>
        </intent-filter>
        <intent-filter
            android:priority="-1">
            <action android:name="android.intent.action.VIEW" />
            <category android:name="android.intent.category.DEFAULT" />
            <category android:name="android.intent.category.BROWSABLE" />
            <data android:scheme="content" />
            <data android:mimeType="audio/*"/>
            <data android:mimeType="application/ogg"/>
            <data android:mimeType="application/x-ogg"/>
            <data android:mimeType="application/itunes"/>
        </intent-filter>