Oreo, default SMS App and ACTION_RESPOND_VIA_MESSAGE

问题

Applications targeting Android O have a couple of new rules when using services, one of them is that we can't start services while the application is in background.

One of the requirements to be a default SMS application is: (from the Telephony.java javadoc)

* <li>In a service, include an intent filter for {@link
* android.telephony.TelephonyManager#ACTION_RESPOND_VIA_MESSAGE}
* (<code>"android.intent.action.RESPOND_VIA_MESSAGE"</code>) with schemas,
* <code>sms:</code>, <code>smsto:</code>, <code>mms:</code>, and <code>mmsto:</code>.
* This service must also require the {@link
* android.Manifest.permission#SEND_RESPOND_VIA_MESSAGE} permission.
* <p>This allows users to respond to incoming phone calls with an immediate text message
* using your app.</p></li>
* </ul>

You can see my problem... because ACTION_RESPOND_VIA_MESSAGE needs a service with permission SEND_RESPOND_VIA_MESSAGE if we receive a phone call while the application is in background and the user rejects the call with a text message the service will fail to start.

1237-6018 W/Binder: Binder call failed.
                    java.lang.IllegalStateException: Not allowed to start service Intent { act=android.intent.action.RESPOND_VIA_MESSAGE dat=smsto:xxxxxxxxx cmp=APP_PACKAGE_NAME (has extras) }: app is in background uid null

Any idea how to fix this issue?

回答1:

This shouldn't be the case with stock android, as default implementation does not call SMS App to reject calls with message and usage SmsManager instead.

reference from RespondViaSmsManager.java in AOSP oreo

/**
 * Reject the call with the specified message. If message is null this call is ignored.
 */
private void rejectCallWithMessage(Context context, String phoneNumber, String textMessage,
                                   int subId, String contactName) {
    if (TextUtils.isEmpty(textMessage)) {
        Log.w(RespondViaSmsManager.this, "Couldn't send SMS message: empty text message. ");
        return;
    }
    if (!SubscriptionManager.isValidSubscriptionId(subId)) {
        Log.w(RespondViaSmsManager.this, "Couldn't send SMS message: Invalid SubId: " +
                subId);
        return;
    }

    SmsManager smsManager = SmsManager.getSmsManagerForSubscriptionId(subId);
    try {
        smsManager.sendTextMessage(phoneNumber, null, textMessage, null /*sentIntent*/,
                null /*deliveryIntent*/);

        SomeArgs args = SomeArgs.obtain();
        args.arg1 = !TextUtils.isEmpty(contactName) ? contactName : phoneNumber;
        args.arg2 = context;
        mHandler.obtainMessage(MSG_SHOW_SENT_TOAST, args).sendToTarget();
    } catch (IllegalArgumentException e) {
        Log.w(RespondViaSmsManager.this, "Couldn't send SMS message: " +
                e.getMessage());
    }
}

seems like some oems (I have experianced this with oneplus) customized this and kept older behaviour which requires starting the service of SMS app. without keeping in mind that there are limatations in oreo with respect to background services.

following are a few complaints:

1. https://www.reddit.com/r/oneplus/comments/8n9w37/cant_send_text_message_when_rejecting_phone_call/
2. https://forums.oneplus.com/threads/reject-call-with-sms-is-not-working-after-oreo-update-oxygen-5-0-1-3t.817578/

I have experianced this behaviour on most of the SMS apps, including Messages from google on oneplus 5 with android version 8.1

This still doesn't explain how OEM provided sms app or SMS Organizer from microsoft works for this use case on same device.

来源：https://stackoverflow.com/questions/48205193/oreo-default-sms-app-and-action-respond-via-message