What intent-filters must my app cover to appear in chooser when requestion an image from an external app?

Question

What are the possible intent-filter I need to cover to make sure that any external app requesting an image will see my app in the list?

To clarify, I'd like my app to appear when doing the following:

So far I've covered:

<intent-filter>
    <action android:name="android.intent.action.PICK" />
    <category android:name="android.intent.category.DEFAULT" />
    <data android:mimeType="image/*" />
</intent-filter>
<intent-filter>
    <action android:name="android.intent.action.GET_CONTENT" />
    <category android:name="android.intent.category.DEFAULT" />
    <data android:mimeType="image/*" />
</intent-filter>

However, if using the Tumblr app and pressing "Add photo", my app does not appear in the chooser dialog. Which filter am I missing out on?

Answer 1

I had covered the correct intent-filters, however the Tumblr app requires the category OPENABLE, so instead of the filters I had I'm now using:

<intent-filter>
    <action android:name="android.intent.action.PICK" />
    <category android:name="android.intent.category.DEFAULT" />
    <data android:mimeType="image/*" />
</intent-filter>
<intent-filter>
    <action android:name="android.intent.action.GET_CONTENT" />
    <category android:name="android.intent.category.DEFAULT" />
    <category android:name="android.intent.category.OPENABLE" />
    <data android:mimeType="image/*" />
</intent-filter>

Only adding the line:

<category android:name="android.intent.category.OPENABLE" />

Answer 2

Some applications may specify the application to open, and some applications have already set the default applications to Open.