How to open WhatsApp using an Intent in your Android App

Question

I want an Intent to take control you directly to WhatsApp. So the moment the user clicks on the button, the Intent is supposed to take you to WhatsApp. This is the code I wrote after following a few guide lines but it doesn't work

buttonWhatsapp.setOnClickListener(new View.OnClickListener() {         public void onClick(View v) {             // Performs action on click             Intent sendIntent = new Intent();             sendIntent.setAction(Intent.ACTION_SEND);             sendIntent.putExtra(Intent.EXTRA_TEXT, "This is my text to send.");             sendIntent.setType("text/plain");             sendIntent.setPackage("com.whatsapp");             startActivity(Intent.createChooser(sendIntent, ""));             startActivity(sendIntent);             //opens the portfolio details class         }     }); 

Answer 1

Using the 2018 api:

String url = "https://api.whatsapp.com/send?phone="+number; Intent i = new Intent(Intent.ACTION_VIEW); i.setData(Uri.parse(url)); startActivity(i); 

Answer 2

This code working for me

String contact = "+00 9876543210"; // use country code with your phone number     String url = "https://api.whatsapp.com/send?phone=" + contact;     try {          PackageManager pm = context.getPackageManager();          pm.getPackageInfo("com.whatsapp", PackageManager.GET_ACTIVITIES);          Intent i = new Intent(Intent.ACTION_VIEW);          i.setData(Uri.parse(url));          startActivity(i);                                 } catch (PackageManager.NameNotFoundException e) {     Toast.makeText(MainActivity.activity, "Whatsapp app not installed in your phone", Toast.LENGTH_SHORT).show();     e.printStackTrace();     }