How to open specific contact chat screen in various popular chat/social-networks apps?

Question

Background

I\'ve found that there is a way to open a specific contact conversation screen on WhatsApp, here .

Not only that, but I\'ve found that an app ca

Answer 1

Other posts here have good information. I wanted to add for LINE because the information is lacking in many places.

String userId = findUserId();
String sendText = "line://ti/p/~" + userId;
Intent intent = null;
try {
    intent = Intent.parseUri(sendText, Intent.URI_INTENT_SCHEME);
} catch (URISyntaxException e) {
    e.printStackTrace();
}
startActivity(intent);