不了解 IntentFilters

Question

I am trying to copy a binary file (my own bespoke content, not a standard) from Google Drive to my app using the 'Send a Copy' menu item in Google Drive.

I had a look at the intent that Google Drive sends using Intent Intercept, and it basically is

• ACTION - android.intent.action.SEND
• DATA - null
• MIME - application/octet-stream
• URI - intent:#intent;action=android.intent.action.SEND;type=application/octet-stream;launchFlags=0x1b080000;end
• FLAGS - FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET FLAG_ACTIVITY_FORWARD_RESULT FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT FLAG_ACTIVITY_PREVIOUS_IS_TOP FLAG_RECEIVER_FOREGROUND
• Extras - 1 Class: android.net.Uri$HierarchicalUri Key: android.intent.extra.STREAM Value: content://com.google.android.apps.docs.storage.legacy/enc%3Dy1Gjnka2NiGyk8sKV0CwRjnjL3WimTTirLdLn58FBZ7yVAJ2MPJNL_ZYQFzzl0a3pi0bnikAy29Y%0AcprYV_o8bxcPbb8r0Vv_wfq89BjBp1nQHOPUT8CiHQEzPwVwRhvByYmijg%3D%3D%0A

The intent filter in my app's relevant activity is:

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

        <category android:name="android.intent.category.DEFAULT" />
        <category android:name="android.intent.category.BROWSABLE" />

        <data
            android:mimeType="application/octet-stream" />
    </intent-filter>

and after some messing around it does now show up in the 'Send file with' list in Google Drive.

If I select my app as the target, it turns up in the onCreate() of the relevant activity, I can get the intent OK with getIntent(), but getData() - which is what I used to use with ACTION_VIEW intents from other places - returns null, probably not surprising as Data is listed as null in the intent above.

What I am not at all sure - with my limited knowledge and having read the 'Receiving simple data from other apps' documentation - is what to do next. How do I get access to the file data so I can copy it?

The next question, assuming I do succeed at that (with helpful answers), if I want to send multiple files at once from Google Drive, it looks to me that it will then use the SEND_MULTIPLE intent, so how would I access each files data then?

Answer 1

How do I get access to the file data so I can copy it?

A Uri pointing to the shared content is in EXTRA_STREAM . Call getParcelableExtra() on the Intent to retrieve it. You can then use a ContentResolver and openInputStream() to read in the content identified by that Uri .

How to obtain the value of the extra is covered by the documentation .

it will then use the SEND_MULTIPLE intent, so how would I access each files data then?

EXTRA_STREAM will now be a list of Uri values. Call getParcelableArrayListExtra() on the Intent to retrieve it. You can then iterate over that list and use a ContentResolver and openInputStream() to get the content identified by the Uri .

As before, how to obtain the value the extra is covered by the documentation .