android - 带有单选按钮的 NoSuchMethodException

Question

我正在尝试编写一个表单，有一次有 2 个单选按钮询问此人的性别。我想要求至少按下一个按钮，否则他们就会 toast 。它们出现在 activity_main 中:

<RadioGroup 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <RadioButton
            android:id="@+id/radioButton1"
            android:layout_width="wrap_content"
            android:layout_height="53dp"
            android:layout_weight="1.00"
            android:onClick="onRadioButtonClicked"
            android:text="@string/female" />

        <RadioButton
            android:id="@+id/radioButton2"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_weight="1.00"
            android:onClick="onRadioButtonClicked"
            android:text="@string/male" />
</RadioGroup>

以及MainActivity中的相关代码:

    RadioButton rb1, rb2;
    rb1 = (RadioButton) findViewById(R.id.radioButton1);
    rb2 = (RadioButton) findViewById(R.id.radioButton2);
    if(!rb1.isChecked() && !rb2.isChecked()){
        Toast.makeText(this, "Please select a gender.", Toast.LENGTH_SHORT).show();
        return;
    }

可能值得注意的是，我曾尝试只使用一个 & 执行 if 语句，但我的应用程序在单击单选按钮时仍然崩溃。

这是 LogCat:

09-11 01:21:26.599: E/AndroidRuntime(821): FATAL EXCEPTION: main
09-11 01:21:26.599: E/AndroidRuntime(821): java.lang.IllegalStateException: Could not find a method onRadioButtonClicked(View) in the activity class com.example.myapplication.MainActivity for onClick handler on view class android.widget.RadioButton with id 'radioButton1'
09-11 01:21:26.599: E/AndroidRuntime(821):  at android.view.View$1.onClick(View.java:3620)
09-11 01:21:26.599: E/AndroidRuntime(821):  at android.view.View.performClick(View.java:4240)
09-11 01:21:26.599: E/AndroidRuntime(821):  at android.widget.CompoundButton.performClick(CompoundButton.java:100)
09-11 01:21:26.599: E/AndroidRuntime(821):  at android.view.View$PerformClick.run(View.java:17721)
09-11 01:21:26.599: E/AndroidRuntime(821):  at android.os.Handler.handleCallback(Handler.java:730)
09-11 01:21:26.599: E/AndroidRuntime(821):  at android.os.Handler.dispatchMessage(Handler.java:92)
09-11 01:21:26.599: E/AndroidRuntime(821):  at android.os.Looper.loop(Looper.java:137)
09-11 01:21:26.599: E/AndroidRuntime(821):  at android.app.ActivityThread.main(ActivityThread.java:5103)
09-11 01:21:26.599: E/AndroidRuntime(821):  at java.lang.reflect.Method.invokeNative(Native Method)
09-11 01:21:26.599: E/AndroidRuntime(821):  at java.lang.reflect.Method.invoke(Method.java:525)
09-11 01:21:26.599: E/AndroidRuntime(821):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
09-11 01:21:26.599: E/AndroidRuntime(821):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
09-11 01:21:26.599: E/AndroidRuntime(821):  at dalvik.system.NativeStart.main(Native Method)
09-11 01:21:26.599: E/AndroidRuntime(821): Caused by: java.lang.NoSuchMethodException: onRadioButtonClicked [class android.view.View]
09-11 01:21:26.599: E/AndroidRuntime(821):  at java.lang.Class.getConstructorOrMethod(Class.java:423)
09-11 01:21:26.599: E/AndroidRuntime(821):  at java.lang.Class.getMethod(Class.java:787)
09-11 01:21:26.599: E/AndroidRuntime(821):  at android.view.View$1.onClick(View.java:3613)
09-11 01:21:26.599: E/AndroidRuntime(821):  ... 12 more

谢谢。

Answer 1

创建一个方法onRadioButtonClicked，因为您已经在xml 中设置了onClick。所以你必须在 Activity 中有一个可以处理点击的方法。

方法

public void onRadioButtonClicked(View v){
    // Your code on click
}