How to pass a Bundle to Android Wear using MessageApi

Question

I'm currently passing Bytes to AnroidWear using:

 MessageApi.SendMessageResult result = Wearable.MessageApi.sendMessage(
                        mGoogleApiClient, node.getId(), path, text.getBytes() ).await();

I want to send a proper Data Bundle to my Wearable, how do I do that?

Answer 1

Convert your bundle to bytes, and on receiver, convert bytes to Bundle.

With this simple method, you can send only String Bundle values.

(And, It seems that you can convert Bundle to String with GSON and BundleTypeAdapterFactory also, but I'm not tested.)

public void example() {
    // Value
    Bundle inBundle = new Bundle();
    inBundle.putString("key1", "value");
    inBundle.putInt("key2", 1); // will be failed
    inBundle.putFloat("key3", 0.5f); // will be failed
    inBundle.putString("key4", "this is key4");

    // From Bundle to bytes
    byte[] inBytes = bundleToBytes(inBundle);

    // From bytes to Bundle
    Bundle outBundle = jsonStringToBundle(new String(inBytes));

    // Check values
    String value1 = outBundle.getString("key1"); // good
    int value2 = outBundle.getInt("key2"); // fail
    float value3 = outBundle.getFloat("key3"); // fail
    String value4 = outBundle.getString("key4"); // good

}


private byte[] bundleToBytes(Bundle inBundle) {
    JSONObject json = new JSONObject();
    Set<String> keys = inBundle.keySet();
    for (String key : keys) {
        try {
            json.put(key, inBundle.get(key));
        } catch (JSONException e) {
            //Handle exception here
        }
    }

    return json.toString().getBytes();
}


public static Bundle jsonStringToBundle(String jsonString) {
    try {
        JSONObject jsonObject = new JSONObject(jsonString);
        return jsonToBundle(jsonObject);
    } catch (JSONException ignored) {

    }
    return null;
}

public static Bundle jsonToBundle(JSONObject jsonObject) throws JSONException {
    Bundle bundle = new Bundle();
    Iterator iter = jsonObject.keys();
    while (iter.hasNext()) {
        String key = (String) iter.next();
        String value = jsonObject.getString(key);
        bundle.putString(key, value);
    }
    return bundle;
}