android - Cannot download unknown extensions -

i cannot download (from web & e-mail) unkwown extentions such (*.ini, *.zip, *.ddd) unless there exists app can understand extention.

for example, couldn't download *.ini file browser (or email) until downloaded 'astro' app.

1. how can pass downloadable?
2. how can register app understan extention can downloadable?

how can pass downloadable?

you don't.

how can register app understan extention can downloadable?

ideally, don't. mime type. file extensions fragile. however, either can achieved via use of <data> element in activity's <intent-filter>. want browseable category , view action.

for example, here how arrange option viewing pdf files:

<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:mimetype="application/pdf" /> </intent-filter>