How do I add my app to the Android 'share photo' option? [duplicate]

Answer 1

Add this intent filter to your activity in the manifest:

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

Answer 2

See this question on StackOverflow. In the question you will see what you have to add to the manifest and in the first answer you will find how to retreive the data in your activity.

Answer 3

Read Adding an Easy Share action