Question

这只是一个基本的Q＆amp; A应用。当我尝试在应用界面上按radiobutton时出现错误。这是我的主要课程：

public class Balance extends AppCompatActivity {

private int score = 0; //answer score
private int PreviousScore;
private int i = 0;
private Vibrator myVib;


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

    final TextView Score = (TextView) findViewById(R.id.Score);
    Button b = (Button)findViewById(R.id.button); //button

    myVib = (Vibrator) this.getSystemService(VIBRATOR_SERVICE);


    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);


    question(); //call params for question

    //button listener, when button clicked, produce output on textfield "Score"
    b.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            myVib.vibrate(70);
            PreviousScore = score;

            //Score.setText(String.valueOf(action()));
            //Score.setText(score);
            i++;
            question();

            RadioGroup mRadioGroup = (RadioGroup) findViewById(R.id.radioGroup);
            mRadioGroup.clearCheck();

        }

    });




}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_balance, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
        return true;
    }

    return super.onOptionsItemSelected(item);
}


private void question(){
//basically assigning strings to radiobuttons here
}


private void onRadioButtonClicked(View view) {
    // Is the button now checked?
    boolean checked = ((RadioButton) view).isChecked();

    myVib.vibrate(50);

    // Check which radio button was clicked

    switch(view.getId()) {
        case R.id.AnswerA:
            if (checked)
                score = PreviousScore + 0;
            break;
        case R.id.AnswerB:
            if (checked)
                score = PreviousScore + 1;
            break;
        case R.id.AnswerC:
            if (checked)
                score = PreviousScore + 2;
            break;
    }
}

private String action(){

    String action = null;
    if (score <= 16)
        action= "Low Risk";
    else if(score > 16 & score <= 32)
        action = "Medium Risk";
    else if(score > 32 & score <= 48)
        action = "High Risk";
    else if(score > 48 & score <= 64)
        action = "Very High Risk";

    return action;
}


}

这是我的内容视图

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:text="Large Text"
    android:id="@+id/Question"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true" />

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Submit"
    android:id="@+id/button"
    android:layout_marginBottom="132dp"
    android:layout_alignParentBottom="true"
    android:layout_centerHorizontal="true" />

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:id="@+id/Score"
    android:text="score goes here"
    android:layout_above="@+id/radioGroup"
    android:layout_centerHorizontal="true"
    android:textSize="30dp" />

<RadioGroup xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:id="@+id/radioGroup"
    android:layout_above="@+id/button"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true">

    <RadioButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New RadioButton"
        android:id="@+id/AnswerA"
        android:layout_below="@+id/Question"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginTop="41dp"
        android:checked="false"
        android:onClick="onRadioButtonClicked"/>

    <RadioButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New RadioButton"
        android:id="@+id/AnswerB"
        android:layout_below="@+id/AnswerA"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:checked="false"
        android:onClick="onRadioButtonClicked"/>

    <RadioButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New RadioButton"
        android:id="@+id/AnswerC"
        android:layout_below="@+id/AnswerB"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:checked="false"
        android:onClick="onRadioButtonClicked"/>

    <RadioButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New RadioButton"
        android:id="@+id/AnswerD"
        android:layout_below="@+id/AnswerC"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:checked="false"
        android:onClick="onRadioButtonClicked"/>
</RadioGroup>

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Next Text"
    android:id="@+id/Next_Text"
    android:layout_below="@+id/radioGroup"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="58dp" />

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceSmall"
    android:text="Small Text"
    android:id="@+id/currentscore"
    android:layout_below="@+id/Next_Text"
    android:layout_alignParentRight="true"
    android:layout_alignParentEnd="true" />

logcat的：

 02-20 14:14:46.484 9082-9082/com.example.user.tinetti E/AndroidRuntime: FATAL EXCEPTION: main
02-20 14:14:46.484 9082-9082/com.example.user.tinetti E/AndroidRuntime: Process: com.example.user.tinetti, PID: 9082
02-20 14:14:46.484 9082-9082/com.example.user.tinetti E/AndroidRuntime: java.lang.IllegalStateException: Could not find method onRadioButtonClicked(View) in a parent or ancestor Context for android:onClick attribute defined on view class android.support.v7.widget.AppCompatRadioButton with id 'AnswerB'
02-20 14:14:46.484 9082-9082/com.example.user.tinetti E/AndroidRuntime:     at android.support.v7.internal.app.AppCompatViewInflater$DeclaredOnClickListener.resolveMethod(AppCompatViewInflater.java:310)
02-20 14:14:46.484 9082-9082/com.example.user.tinetti E/AndroidRuntime:     at android.support.v7.internal.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:269)
02-20 14:14:46.484 9082-9082/com.example.user.tinetti E/AndroidRuntime:     at android.view.View.performClick(View.java:5198)
02-20 14:14:46.484 9082-9082/com.example.user.tinetti E/AndroidRuntime:     at android.widget.CompoundButton.performClick(CompoundButton.java:122)
02-20 14:14:46.484 9082-9082/com.example.user.tinetti E/AndroidRuntime:     at android.view.View$PerformClick.run(View.java:21147)
02-20 14:14:46.484 9082-9082/com.example.user.tinetti E/AndroidRuntime:     at android.os.Handler.handleCallback(Handler.java:739)
02-20 14:14:46.484 9082-9082/com.example.user.tinetti E/AndroidRuntime:     at android.os.Handler.dispatchMessage(Handler.java:95)
02-20 14:14:46.484 9082-9082/com.example.user.tinetti E/AndroidRuntime:     at android.os.Looper.loop(Looper.java:148)
02-20 14:14:46.484 9082-9082/com.example.user.tinetti E/AndroidRuntime:     at android.app.ActivityThread.main(ActivityThread.java:5417)
02-20 14:14:46.484 9082-9082/com.example.user.tinetti E/AndroidRuntime:     at java.lang.reflect.Method.invoke(Native Method)
02-20 14:14:46.484 9082-9082/com.example.user.tinetti E/AndroidRuntime:     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
02-20 14:14:46.484 9082-9082/com.example.user.tinetti E/AndroidRuntime:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

Answer 1

你必须为所有RadioButtons.Android设置属性OnClick，当你点击单选按钮时可能会触发一个事件。它无法找到onClick方法。它可能是最新版本（API 23）。它是我的实际答案 android：onClick =＆＃34; onRadioButtonClicked＆＃34; 将此添加到您的单选按钮。在您的活动中定义 onRadioButtonClicked 方法，该方法与您的布局相关联。

Answer 2

您必须将private void onRadioButtonClicked设置为public void onRadioButtonClicked

无法在父级或祖先中找到onRadioButtonClicked（View）的方法

2 个答案: