Making A WhatsApp Video Call Without User Intervention

The code is pretty self explanatory. It needs a view with a TextView with id "editText" and a Button with id "button".

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"

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113

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);     }   }