You enter the phone number to TextView and click on the button. It finds a user with this number and makes a video call using whatsapp with no user intervention.
The code can be changed to support VoIP calls also. Then the mimetype should show
"vnd.android.cursor.item/vnd.com.whatsapp.voip.call"
package com.example.whatsappcall;
import android.Manifest;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.net.Uri;
import android.provider.ContactsContract;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
askPermissions();
Button clickButton = findViewById(R.id.button);
clickButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (
checkSelfPermission(Manifest.permission.READ_CONTACTS) != PackageManager.PERMISSION_GRANTED ||
checkSelfPermission(Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED
) {
askPermissions();
} else {
EditText eText = findViewById(R.id.editText);
// I am not checking correctness of number
Long _ID = getContactIdUsingNumber(eText.getText().toString(), v.getContext());
if (_ID != null) {
videoCall(_ID);
} else {
Toast.makeText(v.getContext(), "Number not found or can't accept video call!!!",
Toast.LENGTH_LONG).show();
}
}
}
});
}
// Get required permissions
public void askPermissions() {
// Ask permissions
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_CONTACTS, Manifest.permission.CALL_PHONE}, 1);
}
/*
* Finds out if the given phone number has a whatsapp video call _ID
*/
public Long getContactIdUsingNumber(String phoneNumber, Context context) {
// Search contact using phone number
Uri uri = Uri.withAppendedPath(ContactsContract.PhoneLookup.CONTENT_FILTER_URI, Uri.encode(phoneNumber));
ContentResolver resolver = context.getContentResolver();
Cursor cursor = resolver.query(uri, null, null, null, null);
// Store ID of the contact we are searching
long contactId = 0L;
if (cursor != null && cursor.getCount() > 0) {
cursor.moveToFirst();
contactId = cursor.getLong(cursor.getColumnIndex(ContactsContract.PhoneLookup.CONTACT_ID));
} else
return null;
// Make array of 1 element
String[] selectionArgs = {Long.toString(contactId)};
// Select clause to search for contact I
String selectionClause = ContactsContract.Data.CONTACT_ID + " = ? ";
Long _ID = null;
cursor = context.getContentResolver().query(ContactsContract.Data.CONTENT_URI, null, selectionClause, selectionArgs, null);
// Cursor can't be null but anyway...
if (cursor != null)
while (cursor.moveToNext()) {
String mimeType = cursor.getString(cursor.getColumnIndex(ContactsContract.Data.MIMETYPE));
if (mimeType.equals("vnd.android.cursor.item/vnd.com.whatsapp.video.call")) {
_ID = cursor.getLong(cursor.getColumnIndex(ContactsContract.Data._ID));
}
}
else
return null;
cursor.close();
return _ID;
}
public void videoCall(Long _ID) {
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
String data = "content://com.android.contacts/data/" + Long.toString(_ID);
String type = "vnd.android.cursor.item/vnd.com.whatsapp.video.call";
intent.setDataAndType(Uri.parse(data), type);
intent.setPackage("com.whatsapp");
startActivity(intent);
}
}
