Restricting Android Broadcast Receiver from specific app

Question

I have 2 applications.
If I use service, I can set permission so only app1 can send intent to app2:
Define permission in app2

Answer 1

The tag can also define what permission the broadcasters should have, see http://developer.android.com/guide/topics/manifest/receiver-element.html#prmsn

I means you can protected your receiver from unauthorized broadcasts by coding like this:

...
<permission android:name="com.yourapp.PERMISSION"
    android:protectionLevel="signature"
        android:label="@string/permission_label"
        android:description="@string/permission_desc">
</permission>
...

<receiver android:name=".MyReceiver"
    android:permission="com.yourapp.PERMISSION">
    <intent-filter>
        <action android:name="com.yourapp.ACTION" />
    </intent-filter>
</receiver>
...