android - NoSuchMethodError :com. android.app.fragment getContext 在 android

Question

我在 GridView 类别中的 php web 服务中收到此错误，类别图像在数组列表中我必须通过 web 服务在 GridView 中显示它们但是在 getData() 中发生了错误，因为 NoSuchMethodError请尝试帮助我提前致谢。

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.activity_customerhomepage, container, false);
    gridView = (GridView) rootView.findViewById(R.id.gridView);
    ids = new ArrayList<>();
    categorys = new ArrayList<>();
    category_imgs = new ArrayList<>();

    //Calling the getData method
    getData();
    return rootView;
}

private void getData() {

    final ProgressDialog loading = ProgressDialog.show(getContext(), "Please wait...", "Fetching data...", false, false);

    //Creating a json array request to get the json from our api
    JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(DATA_URL,
            new Response.Listener<JSONArray>() {
                @Override
                public void onResponse(JSONArray response) {
                    //Dismissing the progressdialog on response
                    loading.dismiss();

                    //Displaying our grid
                    showGrid(response);
                }
            },
            new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {

                }
            }
    );

Logcat 错误:

    03-20 22:35:58.002 23736-23736/? E/AndroidRuntime: FATAL EXCEPTION: main
03-20 22:35:58.002 23736-23736/? E/AndroidRuntime: Process: com.android.app.a2aapp, PID: 23736
03-20 22:35:58.002 23736-23736/? E/AndroidRuntime: java.lang.NoSuchMethodError: com.android.app.a2aapp.HomeFragment.getContext
03-20 22:35:58.002 23736-23736/? E/AndroidRuntime:     at com.android.app.a2aapp.HomeFragment.getData(HomeFragment.java:67)
03-20 22:35:58.002 23736-23736/? E/AndroidRuntime:     at com.android.app.a2aapp.HomeFragment.onCreateView(HomeFragment.java:61)
03-20 22:35:58.002 23736-23736/? E/AndroidRuntime:     at android.app.Fragment.performCreateView(Fragment.java:1700)
03-20 22:35:58.002 23736-23736/? E/AndroidRuntime:     at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:890)
03-20 22:35:58.002 23736-23736/? E/AndroidRuntime:     at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1062)
03-20 22:35:58.002 23736-23736/? E/AndroidRuntime:     at android.app.BackStackRecord.run(BackStackRecord.java:684)
03-20 22:35:58.002 23736-23736/? E/AndroidRuntime:     at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1447)
03-20 22:35:58.002 23736-23736/? E/AndroidRuntime:     at android.app.Activity.performStart(Activity.java:5257)
03-20 22:35:58.002 23736-23736/? E/AndroidRuntime:     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2171)
03-20 22:35:58.002 23736-23736/? E/AndroidRuntime:     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2257)
03-20 22:35:58.002 23736-23736/? E/AndroidRuntime:     at android.app.ActivityThread.access$800(ActivityThread.java:139)
03-20 22:35:58.002 23736-23736/? E/AndroidRuntime:     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1210)
03-20 22:35:58.002 23736-23736/? E/AndroidRuntime:     at android.os.Handler.dispatchMessage(Handler.java:102)
03-20 22:35:58.002 23736-23736/? E/AndroidRuntime:     at android.os.Looper.loop(Looper.java:136)
03-20 22:35:58.002 23736-23736/? E/AndroidRuntime:     at android.app.ActivityThread.main(ActivityThread.java:5086)
03-20 22:35:58.002 23736-23736/? E/AndroidRuntime:     at java.lang.reflect.Method.invokeNative(Native Method)
03-20 22:35:58.002 23736-23736/? E/AndroidRuntime:     at java.lang.reflect.Method.invoke(Method.java:515)
03-20 22:35:58.002 23736-23736/? E/AndroidRuntime:     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
03-20 22:35:58.002 23736-23736/? E/AndroidRuntime:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
03-20 22:35:58.002 23736-23736/? E/AndroidRuntime:     at dalvik.system.NativeStart.main(Native Method)

Answer 1

方法getContext()在 API 级别 23 上可用。尝试使用 getActivity() .