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Android

Hector Romero
Hector Romero
6,151 Points
Posted by Hector Romero
Hector Romero
6,151 Points

String post with okhttp

Hi!

I'm trying to post a string using okhttp as follows:

private void postCommand() {

    int channelId = 501;
    String api_key = "S6OT1D3MVEQ6J04D";
    String url = "https://api.thingspeak.com/talkbacks/" + channelId + "/commands";

    if (isNetworkAvailable()) {
        final MediaType text = MediaType.parse("text/x-markdown; charset=utf-8");

        OkHttpClient client = new OkHttpClient();

        String postBody = "api_key=" + api_key + "\n" + "command_string" + "TURN_ON";

        Request request = new Request.Builder()
                .url(url)
                .post(RequestBody.create(text, postBody))
                .build();

        Call call = client.newCall(request);
        call.enqueue(new Callback() {
            @Override
            public void onFailure(Request request, IOException e) {
                alertUserAboutError();
            }

            @Override
            public void onResponse(Response response) throws IOException {
                try {
                    String respuesta = response.body().string();
                    Log.v(TAG, respuesta);
                    if (response.isSuccessful()) {

                    } else {
                        alertUserAboutError();
                    }
                } catch (IOException e) {
                    Log.e(TAG, "Exception caught: ", e);
                }
            }
        });
    }
    else {
        alertUserAboutNetwork();
    }
}

But it doesn't work... It doesn't show errors when running but it seems to end up in onFailure.

Can you help me, please?

Thanks!

3 Answers

James Simshaw
James Simshaw
28,738 Points
James Simshaw
James Simshaw
28,738 Points

Hello,

I'm not familiar with thingspeak's API, however in 

String postBody = "api_key=" + api_key + "\n" + "command_string" + "TURN_ON";

the newline character("\n") seems out of place. With the web, I believe those are usually encoded. I'd recommend at least double checking that part of your code, maybe running it through the debugger.

Hector Romero
Hector Romero
6,151 Points
Hector Romero
Hector Romero
6,151 Points

James, thank you for your answer!

I've checked the part you pointed out and I've tried some configurations but they don't work:

String postBody = "api_key=" + api_key + "command_string" + "TURN_ON";
String postBody = "api_key=" + api_key + "&command_string" + "TURN_ON";

Thingspeak Talkback gives this example:

POST https://api.thingspeak.com/talkbacks/501/commands
     api_key=S6OT1D3MVEQ6J04D
     command_string=OPENDOOR

I don't get to make it work...

Thanks for any help.

James Simshaw
James Simshaw
28,738 Points
James Simshaw
James Simshaw
28,738 Points

One last thought I had is to change

String postBody = "api_key=" + api_key + "&command_string" + "TURN_ON";

to 

String postBody = "api_key=" + api_key + "&command_string=" + "TURN_ON";

If that doesn't work, you're probably going to have to look more into encoding the strings better. I've been reading that Square has a library to help with that called Mimecraft, thought I have not used it. A few stackoverflow postings are available here and here for starters.