我是Android Studio的完全新手，并且具有Java的基本经验。我尝试创建一个Android应用，其中用户必须输入数字，一旦单击按钮，就会从0-6生成一个随机数，如果输入数字和生成的数字相同，则用户获得1分。我曾尝试实现一个得分计数器，但经过1次正确的猜测之后，得分保持在1，并且再也没有提高。

public class Mainactivity extends AppCompatactivity {
String matchingnumbers = "Congratulations!";

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

public void on_button_click(View view) {
    TextView numberW = this.findViewById(R.id.textView);
    EditText tvW = this.findViewById(R.id.editText);
    TextView scoreW =this.findViewById(R.id.textView3);
    Random r = new Random();
    int dicenumber = r.nextInt(6);
    numberW.setText(Integer.toString(dicenumber));

    try {
        int number = Integer.parseInt(numberW.getText().toString());
        int tv = Integer.parseInt(tvW.getText().toString());
            if(number==tv){
                int score = 0;
                score++;
                Toast.makeText(getapplicationContext(),matchingnumbers,Toast.LENGTH_LONG).show();
                scoreW.setText("Your score is = " + score);
        }

    }
    catch (Exception ex) {
        Log.e("Button Errors",ex.toString());
    }
}
}