Calling Intents using Android App Callout

[Tim Butler]

Hi,

I am using the Android App Callout to test using intents

I am struggling with the syntax and could do with a hand.

I am using the build in alarm as an example.

Intent ID: android.intent.action.SET_ALARM 

Extra

android.intent.extra.alarm.MESSAGE  Wakey Wakey

android.intent.extra.alarm.HOUR         12

android.intent.extra.alarm.MINUTES    23

The app wont install as soon as I add the Extras. 

I have tried just the shortened MESSAGE, HOUR and MINUTES.

Would it be possible to have a simple example of the correct syntax for Intents including the Response using one of the Standard Android intents and to another App?

Much thanks in advance

Tim

[William Pride]

Tim,

Form builder expects the values to be paths to data rather than hard coded values. So, these either need to be the paths to a question or, more likely, a hidden value with a calculate expression of the proper value.

For example, your extra key might be:

android.intent.extra.alarm.MESSAGE

And the value would be:

/data/hidden_value_1

With hidden_value_1 having the calculate expression 'Wakey Wakey'

I can see our documentation isn't clear enough on that point and I'll fix that shortly - sorry about that.

Thanks,

Will

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[Tim Butler]

Hi 

With Will's advice I have now got the following working:

Intent ID: com.xxxxxxx.android.app.INTENTCALL

Extra:

IntentVariable1 > /data/HiddenIntVar1

IntentVariable2 > /data/HiddenIntVar2

where /data/HiddenIntVar1 and /data/HiddenIntVar2 are populated from the form.

I am struggling on the response:

ResponseVariable1 > /data/HiddenResVar1

Am I missing something?

Best

Tim

[Tim Butler]

I have now got the Called App to return a string to another dummy program. So now launches the program, scans the value and responds with a single string.

When I launch with CommCare ODK the program, scans the value and then crashes ODK with the following message:

08-22 10:03:18.735: E/AndroidRuntime(13771): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=10, result=-1, data=Intent { (has extras) }} to activity {org.xxxxx.demolog/org.odk.collect.android.activities.FormEntryActivity}: java.lang.NullPointerException

Here is the code

Intent resultIntent = new Intent();

resultIntent.putExtra("BarCodes", single_barcode);

setResult(RESULT_OK, resultIntent);

finish();

In Commcare

Response BarCodes > /data/returnData

Am I missing something? Anyone else had some experience of this?

Much thanks in advance

Tim

[William Pride]

Tim,

CommCareODK actually expects either a single string value with key odk_intent_data and a value that that question will be set to and/or a Bundle called odk_intent_bundle with a set of key-value pairs, as specified at the bottom of this page. So your code here will actually look like:

Intent resultIntent = new Intent();

Bundle extras = new Bundle();
extras.putString("BarCodes",single_barcode);
setResult(RESULT_OK, resultIntent);
finish();

Best,
Will

[Clayton Sims]

Sorry about the somewhat confusing behavior in this regard.

It's not extremely common for applications to maintain a callout contract that is tremendously generic in some regards, and we didn't want to force collisions through people's standard app callouts. This behavior is currently functional but still something we're open to adapting. If you have comments on how you'd like the intent callout structure to work, feel free to either email here or make comments on our wiki at 

http://github.com/dimagi/commcare-odk

Thanks!

-Clayton

[Tim Butler]

Hi Clayton and Will

I got there in the end with Will's patience and help.

The Response was held in this code

@Override

public void onBackPressed() {

// Bundle

Intent resultIntent = new Intent();

        Bundle extras = new Bundle();

// "CommCareResponse1" can be any name you choose and is used to catch the repsonse in CommCare

        extras.putString("CommCareResponse1", programVariable1);

        extras.putString("CommCareResponse2", programVariable1);

resultIntent.putExtra("odk_intent_bundle", extras);

setResult(RESULT_OK, resultIntent);

finish();

super.onBackPressed();

}

Clayton, I think clearer step by step examples would have helped me a lot. As this is passing between programs, it takes a little time to ensure that both the send and receive work in both CommCare and the created app.

I also expected to be able to get response from any program api not just ones I can code myself. Not that much of an issue in this case but would be if we wanted to interface with other mainstream programs.

The last little thing is naming the button. It would be useful to be able to modify this through your interface.

For the record, it is working now and we have a real barcode scanner grabbing 1D barcodes in a split second on a rugged handset :)

Best

Tim

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[Clayton Sims]

Great to hear that you got it working!

You should be able to translate the text of the button globally for the app currently. You can use the locale key:

odk_intent_callout_button

-Clayton

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[Tim Butler]

Hi Clayton,

Thanks for this.

I need to have two varieties, one for scan and one for print.

Any ideas?

Best

Tim

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[Clayton Sims]

Tim,

Unfortunately that isn't currently supported. We have an open issue to work on that feature.

-Clayton