How to set my sms app default in Android Kitkat?

The instructions you posted were correct – the issue is that you must implement all of the required capabilities:

  • In a broadcast receiver, include an intent filter for SMS_DELIVER_ACTION (“android.provider.Telephony.SMS_DELIVER“). The broadcast receiver must also require the BROADCAST_SMS permission.
    This allows your app to directly receive incoming SMS messages.

  • In a broadcast receiver, include an intent filter for WAP_PUSH_DELIVER_ACTION (“android.provider.Telephony.WAP_PUSH_DELIVER“) with the MIME type “application/vnd.wap.mms-message“. The broadcast receiver must also require the BROADCAST_WAP_PUSH permission.
    This allows your app to directly receive incoming MMS messages.

  • In your activity that delivers new messages, include an intent filter for ACTION_SENDTO (“android.intent.action.SENDTO“) with schemas, sms:, smsto:, mms:, and mmsto:.
    This allows your app to receive intents from other apps that want to deliver a message.

  • In a service, include an intent filter for ACTION_RESPONSE_VIA_MESSAGE (“android.intent.action.RESPOND_VIA_MESSAGE“) with schemas, sms:, smsto:, mms:, and mmsto:. This service must also require the SEND_RESPOND_VIA_MESSAGE permission.

Without all four, your app will not be listed in the default SMS selection dialog.

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