如何在文本视图中设置变量文本

Question

在文本视图中,我将字符串的变量值作为文本.我面临的错误是:致命异常:主进程:app.com.application,PID:14336 Java.郎.ClassCastException:Java.郎.字符串无法强制转换为Java.郎.整数atapp.com.application.activity.PayActivity $ 1.onCheckedChanged(PayActivity.java:41)

另外,这是我的这部分代码:

public class PayActivity extends AppCompatActivity {
    Button button;
    RadioGroup radioGroup;
    TextView textView;

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

        button = findViewById(R.id.btnPay);
        radioGroup = findViewById(R.id.radioPay);

        textView = findViewById(R.id.pay);
         final String[] TextShow ={
                "???? ??? ????  2500    ????? ???",
                "???? ??? ????  7000    ????? ???",
                "???? ??? ????  10000    ????? ???",
                 "???? ??? ????  20000   ????? ???"
         };

        radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup group, @IdRes int checkedId) {
                int selectedId = radioGroup.getCheckedRadioButtonId();

                RadioButton radioButton = findViewById(selectedId);
                final int ArticleTag = (int) radioButton.getTag();
                textView.setText(TextShow[ArticleTag]);

                Toast.makeText(PayActivity.this,TextShow[ArticleTag] , Toast.LENGTH_SHORT).show();

            }
        });
    }


}

此外,标签包括"0" ,"1", ,"2" and "3".你能指导我在哪里问题吗？谢谢

Answer 1

您不能将包含整数值的字符串强制转换为整数值:

(int) radioButton.getTag()

你必须显式转换为字符串(因为getTag()返回一个Object),然后解析:

Integer.parseInt(radioButton.getTag().toString())