Question

我尝试创建一个输入2个数字并显示其总和的加法应用程序。该应用给出了错误的答案。

public class MainActivity extends AppCompatActivity {

EditText edtTxt1;
EditText edtTxt2;
TextView txt;
Button btn;

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

    btn = (Button)findViewById(R.id.add_button);
    edtTxt1 = (EditText)findViewById(R.id.editText1);
    edtTxt2 = (EditText)findViewById(R.id.editText2);
    txt = (TextView)findViewById(R.id.answer_textView);

    btn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            int num1 = Integer.parseInt(edtTxt1.getText().toString());
            int num2 = Integer.parseInt(edtTxt1.getText().toString());
            int result = num1 + num2;
            txt.setText(""+result);

        }
    });
}
}

Answer 1

您正在从同一编辑文本中获得两个变量的输入数字，请像下面这样进行更新

int num1 = Integer.parseInt(edtTxt1.getText().toString());
 int num2 = Integer.parseInt(edtTxt2.getText().toString());

Answer 2

'在您的按钮中单击，您将从类似的编辑文本中获得展位号，

int num1 = Integer.parseInt(edtTxt1.getText().toString());
int num2 = Integer.parseInt(edtTxt1.getText().toString());

“正确” “希望您能找到解决方案”

Answer 3

这是解决方法

public class MainActivity extends AppCompatActivity {

EditText edtTxt1;
EditText edtTxt2;
TextView txt;
Button btn;

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

        btn = (Button)findViewById(R.id.add_button);
        edtTxt1 = (EditText)findViewById(R.id.editText1);
        edtTxt2 = (EditText)findViewById(R.id.editText2);
        txt = (TextView)findViewById(R.id.answer_textView);

        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int num1 = Integer.parseInt(edtTxt1.getText().toString());
                int num2 = Integer.parseInt(edtTxt2.getText().toString());
                int result = num1 + num2;
                txt.setText(""+result);
            }
        });

    }
}

我希望这能解决您的问题。让我知道是否有事。

为什么我的附加应用程序给出错误的答案？

3 个答案: