Sending message through WhatsApp

Question

Since I found some older posts, that tell that whatsapp doesn't support this, I was wondering if something had changed and if there is a way to open a whatsapp 'chat' with a number that I'm sending through an intent?

Answer 1

Try this, this code launch WhatsApp via Intent.ACTION_VIEW, don't forget to use country code to the phone number.

startActivity(new Intent(Intent.ACTION_VIEW,
                        Uri.parse(
                                "https://api.whatsapp.com/send?phone=+628119xxx&text=I'm%20interested%20in%20your%20car%20for%20sale"
                        )));

Answer 2

I'm really late here but I believe that nowadays we have shorter and better solutions to send messages through WhatsApp.

You can use the following to call the system picker, then choose which app you will use to share whatever you want.

Intent sendIntent = new Intent();
sendIntent.setAction(Intent.ACTION_SEND);
sendIntent.putExtra(Intent.EXTRA_TEXT, "This is my text to send.");
sendIntent.setType("text/plain");
startActivity(sendIntent);

If you are really need to send through WhatsApp all you need to do is the following (You will skip the system picker)

 Intent sendIntent = new Intent();
    sendIntent.setAction(Intent.ACTION_SEND);
    sendIntent.putExtra(Intent.EXTRA_TEXT, "This is my text to send.");
    sendIntent.setType("text/plain");
    // Put this line here
    sendIntent.setPackage("com.whatsapp");
    //
    startActivity(sendIntent);

If you need more information you can find it here: WhatsApp FAQ

Answer 3

get the contact number whom you want to send the message and create uri for whatsapp, here c is a Cursor returning the selected contact.

Uri.parse("content://com.android.contacts/data/" + c.getString(0)));
i.setType("text/plain");
i.setPackage("com.whatsapp");           // so that only Whatsapp reacts and not the chooser
i.putExtra(Intent.EXTRA_SUBJECT, "Subject");
i.putExtra(Intent.EXTRA_TEXT, "I'm the body.");
startActivity(i);

Answer 4

This works to me:

PackageManager pm = context.getPackageManager();
try {
    pm.getPackageInfo("com.whatsapp", PackageManager.GET_ACTIVITIES);
    Intent intent = new Intent();
            intent.setComponent(new ComponentName(packageName,
                    ri.activityInfo.name));
            intent.setType("text/plain");
            intent.putExtra(Intent.EXTRA_TEXT, element);

} catch (NameNotFoundException e) {
    ToastHelper.MakeShortText("Whatsapp have not been installed.");
}

Answer 5

Tested on Marshmallow S5 and it works!

    Uri uri = Uri.parse("smsto:" + "phone number with country code");
    Intent sendIntent = new Intent(Intent.ACTION_SENDTO, uri);
    sendIntent.setPackage("com.whatsapp");
    startActivity(sendIntent); 

This will open a direct chat with a person, if whatsup not installed this will throw exception, if phone number not known to whatsup they will offer to send invite via sms or simple sms message

Answer 6

The following API can be used in c++ as shown in my article.

You need to define several constants:

//
#define    GroupAdmin                <YOUR GROUP ADMIN MOBILE PHONE>
#define GroupName                <YOUR GROUP NAME>
#define CLIENT_ID                <YOUR CLIENT ID>
#define CLIENT_SECRET            <YOUR CLIENT SECRET>

#define GROUP_API_SERVER        L"api.whatsmate.net"
#define GROUP_API_PATH          L"/v3/whatsapp/group/text/message/12"
#define IMAGE_SINGLE_API_URL    L"http://api.whatsmate.net/v3/whatsapp/group/image/message/12"

//

Then you connect to the API’s endpoint.

hOpenHandle = InternetOpen(_T("HTTP"), INTERNET_OPEN_TYPE_DIRECT, NULL, NULL, 0);
if (hOpenHandle == NULL)
{
    return false;
}

hConnectHandle = InternetConnect(hOpenHandle,
    GROUP_API_SERVER,
    INTERNET_DEFAULT_HTTP_PORT,
    NULL, NULL, INTERNET_SERVICE_HTTP,
    0, 1);

if (hConnectHandle == NULL)
{
    InternetCloseHandle(hOpenHandle);
    return false;
}

Then send both header and body and wait for the result that needs to be “OK”.

Step 1 - open an HTTP request:

const wchar_t *AcceptTypes[] = { _T("application/json"),NULL };
HINTERNET hRequest = HttpOpenRequest(hConnectHandle, _T("POST"), GROUP_API_PATH, NULL, NULL, AcceptTypes, 0, 0);

if (hRequest == NULL)
{
    InternetCloseHandle(hConnectHandle);
    InternetCloseHandle(hOpenHandle);
    return false;
}

Step 2 - send the header:

std::wstring HeaderData;

HeaderData += _T("X-WM-CLIENT-ID: ");
HeaderData += _T(CLIENT_ID);
HeaderData += _T("\r\nX-WM-CLIENT-SECRET: ");
HeaderData += _T(CLIENT_SECRET);
HeaderData += _T("\r\n");
HttpAddRequestHeaders(hRequest, HeaderData.c_str(), HeaderData.size(), NULL);

Step 3 - send the message:

std::wstring WJsonData;
WJsonData += _T("{");
WJsonData += _T("\"group_admin\":\"");
WJsonData += groupAdmin;
WJsonData += _T("\",");
WJsonData += _T("\"group_name\":\"");
WJsonData += groupName;
WJsonData += _T("\",");
WJsonData += _T("\"message\":\"");
WJsonData += message;
WJsonData += _T("\"");
WJsonData += _T("}");

const std::string JsonData(WJsonData.begin(), WJsonData.end());

bResults = HttpSendRequest(hRequest, NULL, 0, (LPVOID)(JsonData.c_str()), JsonData.size());

Now just check the result:

TCHAR StatusText[BUFFER_LENGTH] = { 0 };
DWORD StatusTextLen = BUFFER_LENGTH;
HttpQueryInfo(hRequest, HTTP_QUERY_STATUS_TEXT, &StatusText, &StatusTextLen, NULL);
bResults = (StatusTextLen && wcscmp(StatusText, L"OK")==FALSE);