dial

onclick dial
========================================
                 askDialPermission();
                Intent callIntent = new Intent(Intent.ACTION_DIAL);
                callIntent.setData(Uri.parse("tel:0507888094"));
                if (ActivityCompat.checkSelfPermission(context,
                        Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
                    return;
                }
                startActivity(callIntent);

askpermission method
=======================================
    public void askDialPermission(){
        List<String> listPerm = new ArrayList<>();
        int dialPermission = ContextCompat.checkSelfPermission(context, Manifest.permission.CALL_PHONE);
        if (dialPermission != PackageManager.PERMISSION_GRANTED) {
            listPerm.add(Manifest.permission.CALL_PHONE);
        } if (!listPerm.isEmpty()) {
            //ask permission by request.
            ActivityCompat.requestPermissions(this, listPerm.toArray(new String[listPerm.size()]), REQ_PERMISSION);
        }
    }

manifest
================================================
    <uses-permission android:name="android.permission.CALL_PHONE"/>