在Android应用中打开文件的意图过滤器出现问题 [英] Issue with intent filter for opening a file in Android app

问题描述

我正在尝试在我的android应用中打开任何扩展名为.conf的文件.这是我的AndroidManifest.xml中的内容:

I'm trying to open any file with a .conf extension in my android app. Here's what I have in my AndroidManifest.xml:

<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="file" />
    <data android:host="*" />
    <data android:mimeType="*/*" />
    <data android:pathPattern=".*\\.conf" />
</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="content" />
    <data android:host="*" />
    <data android:mimeType="*/*" />
    <data android:pathPattern=".*\\.conf" />
</intent-filter>

但是，当我点击Downlaods文件夹中的.conf文件时，它显示无法打开文件".

But, when I tap on a .conf file in the Downlaods folder, it says "Can't open file."

这就是我使用意图拦截:

我在做什么错了?

推荐答案

删除:

<data android:host="*" />

来自<intent-filter>条目和

<data android:pathPattern=".*\\.conf" />

来自content之一.

文件扩展名在Android上使用不多.从Android Q开始，文件在Android上使用不多.无需ContentProvider在content Uri上放置类似文件的扩展名，如您在屏幕快照中的Uri所示.

File extensions are not used much on Android. Starting with Android Q, files are not used much on Android. There is no requirement for a ContentProvider to put a file-like extension on a content Uri, as you can see from the Uri in your screenshot.

如果您希望支持像ACTION_VIEW这样的常见Intent动作，最好的选择是将文件保存为具有匹配文件扩展名的通用元格式(例如JSON，XML)，然后使用<intent-filter>过滤相应的MIME类型.您将需要解决用户选择的不是由您的应用创建的文件的可能性，尽管从技术上讲，即使使用自定义扩展名，您也需要处理该文件.

If you wish to support common Intent actions like ACTION_VIEW, your best bet is to save the file in a common meta-format (e.g., JSON, XML) with a file extension that matches, then have your <intent-filter> filter on the corresponding MIME type. You will need to deal with the possibility that the user chooses a file that was not created by your app, though technically you need to deal with that even with your custom extension.

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