I am working on an app that I want to be able to open links from eg.
an email app. I have an intent-filter that looks like this:
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:scheme=https /
/intent-filter
That intent filter is evil.
Now, if I click a link in an email, I get the dialog where I can
choose whether to open the link with my app or with Browser. This is
all well and good, but I also get this dialog whenever I click a link
in the Browser app, or even enter a URL in the address field!
That's what you specified in the intent filter -- you claim to support
every HTTP(S) URL everywhere regardless of MIME type, host, or anything
else. That's why the intent filter is evil.
Is there a way to circumvent this
behavior in the Browser app, yet still present my app as an option
when clicking links in email clients and the like?
Intent filters are agnostic to the sender of the Intent, so anything in
the system could send an Intent that your intent filter will match. Then,
if the sender uses Intent.createChooser(), like the Browser app does, you
will appear as a viable option.
Furthermore, you really need to more tightly constrain that intent filter,
so it is only going to be used for MIME types you actually will support,
or only from certain sites, or something. Look at the data element in
the SDK documentation:
http://developer.android.com/intl/fr/guide/topics/manifest/data-element.html
--
Mark Murphy (a Commons Guy)
http://commonsware.com
Android App Developer Books: http://commonsware.com/books.html
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