public class MainActivity extends AppCompatActivity {

EditText username;
EditText password;
TextView attempt_count;
Button login_btn;
int attempts_remaining = 3;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    username = (EditText) findViewById(R.id.editText_user);
    password = (EditText) findViewById(R.id.editText_password);
    attempt_count = (TextView) findViewById(R.id.textView_attempts_count);
    login_btn = (Button) findViewById(R.id.button);



    login_btn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {


            if (username.getText().toString().equals("admin") && password.getText().toString().equals("password")) {
                Toast.makeText(getApplicationContext(), "Redirecting ...", Toast.LENGTH_SHORT).show();
                Intent website = new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.google.co.uk"));
               startActivity(website);


            } else {
                Toast.makeText(getApplicationContext(), "Wrong Username or Password", Toast.LENGTH_SHORT).show();


                attempt_count.setVisibility(View.VISIBLE);
                attempt_count.setTextColor(Color.RED);
                attempts_remaining--;
                attempt_count.setText(Integer.toString(attempts_remaining));


                if (attempts_remaining == 0) {

                    Toast.makeText(getApplicationContext(), "Login Failed", Toast.LENGTH_SHORT).show();
                    Toast.makeText(getApplicationContext(), "Please Wait", Toast.LENGTH_SHORT).show();
                    login_btn.setEnabled(false);


                }
            }

        }
    });

}