if (Build.VERSION.SDK_INT >= 23) {
            if(checkSelfPermission(Manifest.permission.CAMERA)== PackageManager.PERMISSION_GRANTED
                    && checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE)==PackageManager.PERMISSION_GRANTED){
            }else if(checkSelfPermission(Manifest.permission.CAMERA)==PackageManager.PERMISSION_GRANTED
                    && checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE)!=PackageManager.PERMISSION_GRANTED){
                ActivityCompat.requestPermissions(LoginActivity.this,new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
            }else if(checkSelfPermission(Manifest.permission.CAMERA)!=PackageManager.PERMISSION_GRANTED
                    && checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE)==PackageManager.PERMISSION_GRANTED){
                ActivityCompat.requestPermissions(LoginActivity.this,new String[]{Manifest.permission.CAMERA}, 1);
            }else{
                ActivityCompat.requestPermissions(LoginActivity.this,new String[]{Manifest.permission.CAMERA,Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
            }
        }