如果选中单选按钮，则在 Java 中显示一个文本框

Question

我正在尝试创建类似应用程序的测验。基本上，用户选择他们的选项并在最后显示结果（例如，以关于下一步去哪里的建议的形式）。因此，如果选中了两个特定的单选按钮，那么如何显示一个文本框，我可以在其中以文本形式提供建议？如果有人能指导我朝着正确的方向前进，我将不胜感激。谢谢。

同样，我在 JS 或 Jquery 中找到了很多答案，但在 Java 中找到了 none，这就是我不得不问的原因。我正在使用 Android Studio。

编辑：（这是我的代码，但我不确定如何修复这些错误（错误是视图、getId 和 setText） `public class MainActivity4 扩展了 AppCompatActivity {

private String view;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main4);

    public void onClick(View view) {
        boolean checked = ((RadioButton) view).isChecked();

        RadioButton rb1 = (RadioButton) findViewById(R.id.radio_mountains);
        RadioButton rb2 = (RadioButton) findViewById(R.id.radio_sights_and_landmarks);
        RadioButton rb3 = (RadioButton) findViewById(R.id.radio_water_bodies);
        RadioButton rb4 = (RadioButton) findViewById(R.id.radio_water_sports);
        RadioButton rb5 = (RadioButton) findViewById(R.id.radio_islands);
        RadioButton rb6 = (RadioButton) findViewById(R.id.radio_hiking);
        RadioButton rb7 = (RadioButton) findViewById(R.id.radio_road_trips);
        RadioButton rb8 = (RadioButton) findViewById(R.id.radio_beaches);
        RadioButton rb9 = (RadioButton) findViewById(R.id.radio_city_travel);
        RadioButton rb10 = (RadioButton) findViewById(R.id.radio_deserts);
        RadioButton rb11 = (RadioButton) findViewById(R.id.radio_wildlife_viewing);
        RadioButton rb12 = (RadioButton) findViewById(R.id.radio_glaciers);
        RadioButton rb13 = (RadioButton) findViewById(R.id.radio_coasts);

        switch(((RadioButton) view).findViewById()) {
            case R.id.radio_mountains:
            case R.id.radio_sights_and_landmarks:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_mountains:
            case R.id.radio_water_sports:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_mountains:
            case R.id.radio_hiking:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_mountains:
            case R.id.radio_road_trips:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_mountains:
            case R.id.radio_beaches:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_mountains:
            case R.id.radio_city_travel:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_mountains:
            case R.id.radio_wildlife_viewing:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_water_bodies:
            case R.id.radio_sights_and_landmarks:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_water_bodies:
            case R.id.radio_water_sports:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_water_bodies:
            case R.id.radio_hiking:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_water_bodies:
            case R.id.radio_road_trips:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_water_bodies:
            case R.id.radio_beaches:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_water_bodies:
            case R.id.radio_city_travel:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_islands:
            case R.id.radio_sights_and_landmarks:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_islands:
            case R.id.radio_water_sports:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_islands:
            case R.id.radio_hiking:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_islands:
            case R.id.radio_road_trips:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_islands:
            case R.id.radio_beaches:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_islands:
            case R.id.radio_city_travel:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_islands:
            case R.id.radio_wildlife_viewing:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_glaciers:
            case R.id.radio_sights_and_landmarks:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_glaciers:
            case R.id.radio_water_sports:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_glaciers:
            case R.id.radio_hiking:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_glaciers:
            case R.id.radio_road_trips:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_glaciers:
            case R.id.radio_beaches:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_glaciers:
            case R.id.radio_city_travel:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_glaciers:
            case R.id.radio_wildlife_viewing:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_deserts:
            case R.id.radio_sights_and_landmarks:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_deserts:
            case R.id.radio_water_sports:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_deserts:
            case R.id.radio_hiking:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_deserts:
            case R.id.radio_road_trips:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_deserts:
            case R.id.radio_beaches:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_deserts:
            case R.id.radio_city_travel:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_deserts:
            case R.id.radio_wildlife_viewing:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_coasts:
            case R.id.radio_sights_and_landmarks:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_coasts:
            case R.id.radio_water_sports:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_coasts:
            case R.id.radio_hiking:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_coasts:
            case R.id.radio_road_trips:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_coasts:
            case R.id.radio_beaches:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_coasts:
            case R.id.radio_city_travel:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;
            case R.id.radio_coasts:
            case R.id.radio_wildlife_viewing:
                if (checked)
                    findViewById(R.id.textView4).setText("Button1 has been chosen");
                break;

        }
    }

    {
        }

    }}`

Answer 1

我不确定您使用 android 工作室的经验水平，所以我假设您知道如何使用 OnClickListeners。如果没有，请查看本教程。 https://www.youtube.com/watch?v=01gOTzT2v-0

与其在单击时创建 TextView，不如尝试创建一个空的 TextView，然后简单地更改其中的文本。尝试将此方法用于您的 onClick：

public void onClick(View view) {
    boolean checked = ((RadioButton) view).isChecked();

    switch(view.getId()) {
        case R.id.button1:
            if (checked)
        findViewById(R.id.textView).setText("Button1 has been chosen");
            break;
        case R.id.button2:
            if (checked)
        findViewById(R.id.textView).setText("Button2 has been chosen");
            break;
    }
}

您必须将“R.id.something”更改为适当的 ID。我相信您将能够使用该方法或使用有用的部分。希望我有所帮助！

Answer 2

TextView textView; 

public void onCreate(){
    textView = findViewById(R.id.paymentMethodTextView);
}
//Out of onCreate
@SuppressLint({"NonConstantResourceId", "SetTextI18n"})
public void onRadioButtonClicked(View view) {
    // Is the button now checked?
    boolean checked = ((RadioButton) view).isChecked();

    // Check which radio button was clicked
    switch (view.getId()) {
        case R.id.cashPayment:
            if (checked)
                textView.setText("Button1 has been chosen");
            break;
        case R.id.cardPayment:
            if (checked)
                textView.setText("Button2 has been chosen");
            break;
    }
}

如果选中单选按钮，则在 Java 中显示一个文本框

If radio button is checked, display a text box in Java

java

radio-button

android-studio