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copied!<p>Here is how I defined my activity in my AndroidManifest.xml to get this to work.</p> <pre><code><activity android:name="com.keepassdroid.PasswordActivity"> <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:mimeType="*/*" /> <data android:pathPattern=".*\\.kdb" /> <data android:host="*" /> </intent-filter> </activity> </code></pre> <p>The <code>scheme</code> of <code>file</code> indicates that this should happen when a local file is opened (rather than protocol like HTTP).</p> <p><code>mimeType</code> can be set to <code>\*/\*</code> to match any mime type.</p> <p><code>pathPattern</code> is where you specify what extension you want to match (in this example <code>.kdb</code>). The <code>.*</code> at the beginning matches any squence of characters. These strings require double escaping, so <code>\\\\.</code> matches a literal period. Then, you end with your file extension. One caveat with pathPattern is that <code>.*</code> is not a greedy match like you would expect if this was a regular expression. This pattern will fail to match paths that contain a <code>.</code> before the <code>.kdb</code>. For a more detailed discussion of this issue and a workaround see <a href="https://stackoverflow.com/questions/3400072/pathpattern-to-match-file-extension-does-not-work-if-a-period-exists-elsewhere-i/8599921#8599921">here</a></p> <p>Finally, according to the Android documentation, both <code>host</code> and <code>scheme</code> attributes are required for the <code>pathPattern</code> attribute to work, so just set that to the wildcard to match anything.</p> <p>Now, if you select a <code>.kdb</code> file in an app like Linda File Manager, my app shows up as an option. I should note that this alone does not allow you to download this filetype in a browser, since this only registers with the file scheme. Having an app like Linda File Manager on your phone resisters itself generically allowing you to download any file type.</p>

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