android - fragment 中的 Snackbar 给出 IllegalArgumentException : No suitable parent found from the given view

Question

我的应用程序有两个选项卡。对于选项卡，我使用 fragment 。每个选项卡都有一个使用 Volley 的网络调用。对于 Volley 错误，我使用 Snackbar 来显示错误。我的问题是，如果我在触发错误时位于该特定 fragment 中，则 Snackbar 运行良好。如果我在错误触发此错误之前返回。

日志..

12-21 09:11:18.782 3707-3707/com.dushanmadushanka.slicdashboard.slicdashboard E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.dushanmadushanka.slicdashboard.slicdashboard, PID: 3707
    java.lang.IllegalArgumentException: No suitable parent found from the given view. Please provide a valid view.
        at android.support.design.widget.Snackbar.make(Snackbar.java:181)
        at com.dushanmadushanka.slicdashboard.slicdashboard.other.VolleyErrorHandle.handleVolleyErrorThree(VolleyErrorHandle.java:102)
        at com.dushanmadushanka.slicdashboard.slicdashboard.fragment.general.GeneralRegionalFragment$4.onErrorResponse(GeneralRegionalFragment.java:288)
        at com.android.volley.Request.deliverError(Request.java:617)
        at com.android.volley.ExecutorDelivery$ResponseDeliveryRunnable.run(ExecutorDelivery.java:104)
        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)

fragment ...

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

getTableJsonData(1, AppConfig.URL_GET, 1, lView);

    return lView;
    }

方法...

private void getTableJsonData(int currentMonth, String mUrl, int screenType, final View lView) {

    StringRequest stringRequest = new StringRequest(Request.Method.GET, newUrl, new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {


        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            if (requestQueue != null) {
                myList.clear();
                lrAdapter.setJsonData(myList);
                VolleyErrorHandle.handleVolleyErrorThree(error, progressBar, lView.findViewById(R.id.fragment_life_region_layout));
            }
        }
    });
    //AppController.getInstance().addToRequestQueue(stringRequest, TAG_REQ);
    requestQueue.add(stringRequest);
    stringRequest.setRetryPolicy(new DefaultRetryPolicy(15 * 1000, 1,
            DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
}

snackbar ....

public static void handleVolleyErrorThree(VolleyError error, ProgressBar p, View view) {
    if (error instanceof TimeoutError || error instanceof NoConnectionError) {
        Snackbar snackbar = Snackbar.make(view, "Please connect to the network!", Snackbar.LENGTH_LONG);
        View snackbarView = snackbar.getView();
        TextView textView = snackbarView.findViewById(android.support.design.R.id.snackbar_text);
        textView.setTextColor(Color.WHITE);
        snackbarView.setBackgroundColor(Color.RED);
        snackbar.show();
    } else if (error instanceof AuthFailureError) {
        Snackbar snackbar = Snackbar.make(view, "Authentication error!", Snackbar.LENGTH_LONG);
        View snackbarView = snackbar.getView();
        TextView textView = snackbarView.findViewById(android.support.design.R.id.snackbar_text);
        textView.setTextColor(Color.WHITE);
        snackbarView.setBackgroundColor(Color.RED);
        snackbar.show();
    } else if (error instanceof ServerError) {
        Snackbar snackbar = Snackbar.make(view, "No data!", Snackbar.LENGTH_LONG);
        View snackbarView = snackbar.getView();
        TextView textView = snackbarView.findViewById(android.support.design.R.id.snackbar_text);
        textView.setTextColor(Color.WHITE);
        snackbarView.setBackgroundColor(Color.RED);
        snackbar.show();
    } else if (error instanceof NetworkError) {
        Snackbar snackbar = Snackbar.make(view, "Network error!", Snackbar.LENGTH_LONG);
        View snackbarView = snackbar.getView();
        TextView textView = snackbarView.findViewById(android.support.design.R.id.snackbar_text);
        textView.setTextColor(Color.WHITE);
        snackbarView.setBackgroundColor(Color.RED);
        snackbar.show();
    } else if (error instanceof ParseError) {
        Snackbar snackbar = Snackbar.make(view, "Database connection error!", Snackbar.LENGTH_LONG);
        View snackbarView = snackbar.getView();
        TextView textView = snackbarView.findViewById(android.support.design.R.id.snackbar_text);
        textView.setTextColor(Color.WHITE);
        snackbarView.setBackgroundColor(Color.RED);
        snackbar.show();
    }
    p.setVisibility(View.GONE);
}

Answer 1

你可以尝试在调用 SnackBar 时使用 Activity content View 作为你的参数，像这样:

View view = getActivity().findViewById(android.R.id.content);

Snackbar snackbar = Snackbar.make(view, "Please connect to the network!", Snackbar.LENGTH_LONG);
...
snackbar.show();