setText() 错误，TextView 方法无法解析

Question

方法无法解析此代码中的 TextView 这有

什么问题？

public class MainActivity extends AppCompatActivity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

    }

    EditText Username = (EditText) findViewById(R.id.EmployerNameEdit);

    String userName = Username.getText().toString();

    TextView changedName = (TextView) findViewById(R.id.employerName);

    changedName.setText(userName);

}

Answer 1

可能是你错过了大括号，公共类 MainActivity 扩展 AppCompatActivity {@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    EditText Username = (EditText) findViewById(R.id.EmployerNameEdit);    String userName = Username.getText().toString();    TextView changedName = (TextView) findViewById(R.id.employerName);    changedName.setText(userName);}}如果您仍然遇到问题，请随时提出问题。:)

Answer 2

oncreate 或 create global edittext 和 TextView 中的每件事@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main); EditText Username = (EditText) findViewById(R.id.EmployerNameEdit);String userName = Username.getText().toString();TextView changedName = (TextView) findViewById(R.id.employerName);changedName.setText(userName); }