private void nextActivity() {
		// Here, thisActivity is the current activity
		if ((ContextCompat.checkSelfPermission(this,
				Manifest.permission.READ_PHONE_STATE)
				!= PackageManager.PERMISSION_GRANTED) || (ContextCompat.checkSelfPermission(this,
				Manifest.permission.GET_ACCOUNTS)
				!= PackageManager.PERMISSION_GRANTED)) {

				ActivityCompat.requestPermissions(this,
						new String[]{Manifest.permission.READ_PHONE_STATE,Manifest.permission.GET_ACCOUNTS},
						PERMISSION_PHONE_READ_STATE);
		} else {
			TelephonyManager mTelephonyMgr = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
			String imei = mTelephonyMgr.getDeviceId();

			if (Build.VERSION.SDK_INT >= 23 && imei==null) {
				ActivityCompat.requestPermissions(this,
						new String[]{Manifest.permission.READ_PHONE_STATE,Manifest.permission.GET_ACCOUNTS},
						PERMISSION_PHONE_READ_STATE);
			 } else {
				startActivity(new Intent(this, AtividadePrincipal.class));
				this.finish();
			}
		}
	}