片段中的单选按钮OnCheckedChangeListener错误

Question

在无线电组应用程序崩溃的片段内调用onCheckedCahngedListener时，我遇到了一些问题。当点击广播组中的任何项目时，应用程序崩溃。

fragment_sell.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.syedsaadali.myapplication.SellFragment"
android:orientation="vertical">
<HorizontalScrollView
    android:id="@+id/scrollView"
    android:layout_width="wrap_content"
    android:layout_height="75dp"
    android:layout_gravity="center"
    android:background="#FFFFFF"
    android:fillViewport="true"
    android:measureAllChildren="false"
    android:scrollbars="none">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <RadioGroup
            android:id="@+id/RadioButton1"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="horizontal"
            android:checkedButton="@+id/first"
            >
        <RadioButton
            android:id="@+id/sApartment"
            android:layout_width="100dp"
            android:layout_height="fill_parent"
            android:button="@drawable/apartment"
            android:padding="15dp"
            android:onClick="apartment"/>

        <TextView
            android:layout_width="0.2dp"
            android:layout_height="fill_parent"
            android:layout_alignParentRight="true"
            android:background="@mipmap/vertical" />
        <RadioButton
            android:id="@+id/sBuilder"
            android:layout_width="100dp"
            android:layout_height="fill_parent"
            android:button="@drawable/house"
            android:padding="15dp"
            android:onClick="house"/>
        <TextView
            android:layout_width="0.2dp"
            android:layout_height="fill_parent"
            android:layout_alignParentRight="true"
            android:background="@mipmap/vertical" />
        <RadioButton
            android:id="@+id/sPlot"
            android:layout_width="100dp"
            android:layout_height="fill_parent"
            android:layout_gravity="center"
            android:button="@drawable/land"
            android:padding="15dp"
            android:onClick="land"/>
        <TextView
            android:layout_width="0.2dp"
            android:layout_height="fill_parent"
            android:layout_alignParentRight="true"
            android:background="@mipmap/vertical" />
        <RadioButton
            android:id="@+id/sHouse"
            android:layout_width="100dp"
            android:layout_height="match_parent"
            android:button="@drawable/builder"
            android:padding="15dp"
            android:onClick="builder"/>
        <TextView
            android:layout_width="0.2dp"
            android:layout_height="fill_parent"
            android:layout_alignParentRight="true"
            android:background="@mipmap/vertical" />
        <RadioButton
            android:id="@+id/sStudioApartment"
            android:layout_width="100dp"
            android:layout_height="fill_parent"
            android:button="@drawable/farmhouse"
            android:padding="15dp"
            android:onClick="farmhouse"/>
        <TextView
            android:layout_width="0.2dp"
            android:layout_height="fill_parent"
            android:layout_alignParentRight="true"
            android:background="@mipmap/vertical" />

        <RadioButton
            android:id="@+id/sFarmHouse"
            android:layout_width="100dp"
            android:layout_height="fill_parent"
            android:button="@drawable/serviceapartment"
            android:padding="15dp"
            android:onClick="servicedapartment"/>
        <TextView
            android:layout_width="0.2dp"
            android:layout_height="fill_parent"
            android:layout_alignParentRight="true"
            android:background="@mipmap/vertical" />
        <RadioButton
            android:id="@+id/sServicedApartment"
            android:layout_width="100dp"
            android:layout_height="fill_parent"
            android:button="@drawable/studioapartment"
            android:padding="15dp"
            android:onClick="studioapartment"/>
        <TextView
            android:layout_width="0.2dp"
            android:layout_height="fill_parent"
            android:layout_alignParentRight="true"
            android:background="@mipmap/vertical" />

        </RadioGroup>

    </LinearLayout>
</HorizontalScrollView>

SellFragment.java

public class SellFragment extends Fragment {
// TODO: Rename parameter arguments, choose names that match
// the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
// TODO: Rename and change types of parameters
private String mParam1;
private String mParam2;
private OnFragmentInteractionListener mListener;
private RadioGroup mRadioGroup1;
private RadioButton mapartment;
private RadioButton mBuilder;
private RadioButton mplot;
private RadioButton mHouse;
private RadioButton mStudioApartment;
private RadioButton mFarmhouse;
private RadioButton mServicedApartment;
private Spinner city;
private View layout;
public static SellFragment newInstance(String param1, String param2) {
    SellFragment fragment = new SellFragment();
    Bundle args = new Bundle();
    args.putString(ARG_PARAM1, param1);
    args.putString(ARG_PARAM2, param2);
    fragment.setArguments(args);
    return fragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    if (getArguments() != null) {
        mParam1 = getArguments().getString(ARG_PARAM1);
        mParam2 = getArguments().getString(ARG_PARAM2);
    }

}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    layout = inflater.inflate(R.layout.fragment_sell, container, false);

    mRadioGroup1=(RadioGroup) layout.findViewById(R.id.RadioButton1);
    mapartment=(RadioButton)layout.findViewById(R.id.sApartment);
    mBuilder=(RadioButton)layout.findViewById(R.id.sBuilder);
    mplot=(RadioButton)layout.findViewById(R.id.sPlot);
    mHouse=(RadioButton)layout.findViewById(R.id.sHouse);
    mStudioApartment=(RadioButton)layout.findViewById(R.id.sStudioApartment);
    mFarmhouse=(RadioButton)layout.findViewById(R.id.sFarmHouse);
    mServicedApartment=(RadioButton)layout.findViewById(R.id.sServicedApartment);
    mRadioGroup1.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {

        @Override
        public void onCheckedChanged(RadioGroup group, int checkedId) {
            if (checkedId == R.id.sApartment) {
                Toast.makeText(getActivity(), "Sell Fragment", Toast.LENGTH_SHORT).show();

            } else if (checkedId == R.id.sBuilder) {
                Toast.makeText(getActivity(), "Sell Fragment", Toast.LENGTH_SHORT).show();

            }
            else if (checkedId == R.id.sPlot) {
                Toast.makeText(getActivity(), "Sell Fragment", Toast.LENGTH_SHORT).show();
            }
            else if (checkedId == R.id.sHouse) {
                Toast.makeText(getActivity(), "Sell Fragment", Toast.LENGTH_SHORT).show();
            }
            else if (checkedId == R.id.sStudioApartment) {
                Toast.makeText(getActivity(), "Sell Fragment", Toast.LENGTH_SHORT).show();
            }
            else if (checkedId == R.id.sFarmHouse) {
                Toast.makeText(getActivity(), "Sell Fragment", Toast.LENGTH_SHORT).show();
            }
            else if (checkedId == R.id.cServicedApartment) {
                Toast.makeText(getActivity(), "Sell Fragment", Toast.LENGTH_SHORT).show();
            }

        }
    });
    return  layout;
}
public void onButtonPressed(Uri uri) {
    if (mListener != null) {
        mListener.onFragmentInteraction(uri);
    }
}
@Override
public void onAttach(Context context) {
    super.onAttach(context);
}
@Override
public void onDetach() {
    super.onDetach();
    mListener = null;
}
@Override
public void onDetach() {
    super.onDetach();
    mListener = null;
}
public interface OnFragmentInteractionListener {
    // TODO: Update argument type and name
    public void onFragmentInteraction(Uri uri);
}}

Logcat:

03-23 02:50:57.703    4697-4697/com.example.syedsaadali.myapplication E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.example.syedsaadali.myapplication, PID: 4697
java.lang.IllegalStateException: Could not find method apartment(View) in a parent or ancestor Context for android:onClick attribute defined on view class android.support.v7.widget.AppCompatRadioButton with id 'cApartment'
        at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.resolveMethod(AppCompatViewInflater.java:307)
        at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:266)
        at android.view.View.performClick(View.java:4780)
        at android.widget.CompoundButton.performClick(CompoundButton.java:120)
        at android.view.View$PerformClick.run(View.java:19866)
        at android.os.Handler.handleCallback(Handler.java:739)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:135)
        at android.app.ActivityThread.main(ActivityThread.java:5254)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

Answer 1

您在XML中定义了<RadioButton ... android:onClick="apartment"/>，但在Activity中没有创建任何方法apartment。

要解决此问题，请删除onClick属性（如果需要注意），或者在java中创建一个类似的方法apartment

public void apartment(View view){
}

您可以直接单击XML的onClick属性中的Alt+Enter，以获得通过创建方法解决此错误的提示。