我正在使用凌空从服务器获取数据。当我在活动中使用它时，一切正常，我得到了所需的输出，但是当我在片段中使用它时，应用程序崩溃了
我已经使用getActivity()作为片段中的上下文，但是它仍然崩溃，并且日志中没有显示错误
GetPinFragment：
public class GetPinFragment extends Fragment implements VolleyListener {
EditText et1_pin, et2_pin, et3_pin, et4_pin;
TextView tv_forgotPasscode;
Button btn_next;
public GetPinFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_get_pin, container, false);
et1_pin = (EditText)view.findViewById(R.id.et1_pin);
et2_pin = (EditText)view.findViewById(R.id.et2_pin);
et3_pin = (EditText)view.findViewById(R.id.et3_pin);
et4_pin = (EditText)view.findViewById(R.id.et4_pin);
tv_forgotPasscode = (TextView)view.findViewById(R.id.tv_forgotPasscode);
btn_next = (Button)view.findViewById(R.id.btn_next);
tv_forgotPasscode.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view)
{
Fragment forgotPasscodeFragment = new ForgotPasscodeFragment();
getFragmentManager().beginTransaction()
.replace(R.id.fragment_container, forgotPasscodeFragment)
.addToBackStack(null).commit();
}
});
btn_next.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view)
{
String pin = et1_pin.getText().toString().trim() + et2_pin.getText().toString().trim() +
et3_pin.getText().toString().trim() + et4_pin.getText().toString().trim();
if(pin.length() == 4)
{
ServerManager serverManager = new ServerManager(getActivity());
Map<String, String> postParams = new HashMap<String, String>();
postParams.put("Email", "driver_18@gmcars.co");
postParams.put("Password", "Yahoo@123");
serverManager.jsonParse(Constants.LOGIN, postParams);
}
}
});
return view;
}
@Override
public void loginRequestFinished(JSONObject response) throws JSONException {
if(response.getJSONObject("DriverData").getString("ResponseCode").equals("0000"))
{
Toast.makeText(getActivity(),
Global.loginResponse.getDriverData().getDriverProfile().getName() + "\n"
+ Global.loginResponse.getDriverData().getDriverProfile().getUserName() + "\n"
+ Global.loginResponse.getDriverData().getDriverProfile().getPostcode() + "\n"
+ Global.loginResponse.getDriverData().getDriverProfile().getMobileNumber() + "\n"
+ Global.loginResponse.getDriverData().getDriverProfile().getCarNo() + "\n"
+ Global.loginResponse.getDriverData().getDriverProfile().getBadgeno() + "\n"
+ Global.loginResponse.getDriverData().getDriverProfile().getApplicationUserId() + "\n"
+ Global.loginResponse.getDriverData().getDriverProfile().getAddress() + "\n"
+ Global.loginResponse.getDriverData().getMessage() + "\n"
+ Global.loginResponse.getDriverData().getResponseCode() + "\n"
,Toast.LENGTH_LONG
).show();
return;
}
if (response.getJSONObject("DriverData").getString("ResponseCode").equals("0001"))
{
Toast.makeText(getActivity(), response.getJSONObject("DriverData").getString("Message"), Toast.LENGTH_SHORT).show();
return;
}
}
ServerManager：
public class ServerManager {
Context ctx;
public ServerManager(Context ctx)
{
this.ctx = ctx;
}
public void jsonParse(String siteURL, Map<String, String> postParams)
{
SSLVerification sslVerification = new SSLVerification(ctx);
RequestQueue requestQueue = Volley.newRequestQueue(ctx, sslVerification.Certificate());
String url = Constants.BASE_URL + siteURL;
/******* Causing app to crash ********/
final VolleyListener volleyListener = (VolleyListener) ctx;
JsonObjectRequest jsonObjReq = new JsonObjectRequest(Request.Method.POST,
url, new JSONObject(postParams),
new Response.Listener<JSONObject>()
{
@Override
public void onResponse(JSONObject response)
{
try {
if(response != null)
{
if (response.getJSONObject("DriverData").getString("ResponseCode").equals("0000"))
{
Gson gson = new Gson();
LoginResponse loginResponse = gson.fromJson(response.toString(), LoginResponse.class);
Global.loginResponse = loginResponse;
/* Calling VolleyListener interface method and returning responseCode */
volleyListener.loginRequestFinished(response);
} else {
/* Calling VolleyListener interface method and returning responseCode */
volleyListener.loginRequestFinished(response);
Toast.makeText(ctx, response.getJSONObject("DriverData").getString("Message"), Toast.LENGTH_SHORT).show();
}
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error)
{
Toast.makeText(ctx, error.getMessage(), Toast.LENGTH_LONG).show();
}
}) {
/* Passing some request headers */
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
HashMap<String, String> headers = new HashMap<String, String>();
headers.put("Content-Type", "application/json; charset=utf-8");
return headers;
}
};
// Adding request to request queue
requestQueue.add(jsonObjReq);
}
}
VolleyListener：
public interface VolleyListener {
public void loginRequestFinished(JSONObject response) throws JSONException;
}
日志：
07-04 09:32:23.129 3086-13677/com.example.admin.gmcars V/FA: Recording user engagement, ms: 1441577
07-04 09:32:23.134 3086-13677/com.example.admin.gmcars V/FA: Connecting to remote service
07-04 09:32:23.239 3086-13677/com.example.admin.gmcars V/FA: Activity paused, time: 150707064
07-04 09:32:23.279 3086-13677/com.example.admin.gmcars D/FA: Logging event (FE): user_engagement(_e), Bundle[{firebase_event_origin(_o)=auto, firebase_screen_id(_si)=3960614141377066253, engagement_time_msec(_et)=1441577, firebase_screen_class(_sc)=LoginActivity}]
07-04 09:32:23.279 3086-3086/com.example.admin.gmcars V/FA: onActivityCreated
07-04 09:32:23.369 3086-13677/com.example.admin.gmcars V/FA: Connection attempt already in progress
07-04 09:32:23.399 3086-13677/com.example.admin.gmcars V/FA: Connection attempt already in progress
07-04 09:32:23.399 3086-13677/com.example.admin.gmcars V/FA: Activity resumed, time: 150707339
07-04 09:32:23.404 3086-13677/com.example.admin.gmcars D/FA: Logging event (FE): screen_view(_vs), Bundle[{firebase_previous_class(_pc)=LoginActivity, firebase_event_origin(_o)=auto, firebase_screen_id(_si)=-8935344662706588953, firebase_screen_class(_sc)=FragmentLoaderActivity, firebase_previous_id(_pi)=3960614141377066253}]
07-04 09:32:23.444 3086-13677/com.example.admin.gmcars V/FA: Connection attempt already in progress
07-04 09:32:23.444 3086-13677/com.example.admin.gmcars D/FA: Connected to remote service
07-04 09:32:23.444 3086-13677/com.example.admin.gmcars V/FA: Processing queued up service tasks: 4
07-04 09:32:23.499 9287-13679/? V/FA-SVC: Logging event: origin=auto,name=user_engagement(_e),params=Bundle[{firebase_event_origin(_o)=auto, firebase_screen_id(_si)=3960614141377066253, engagement_time_msec(_et)=1441577, firebase_screen_class(_sc)=LoginActivity}]
07-04 09:32:23.564 9287-13679/? V/FA-SVC: Saving event, name, data size: user_engagement(_e), 69
07-04 09:32:23.574 9287-13679/? V/FA-SVC: Event recorded: Event{appId='com.example.admin.gmcars', name='user_engagement(_e)', params=Bundle[{firebase_event_origin(_o)=auto, firebase_screen_id(_si)=3960614141377066253, firebase_screen_class(_sc)=LoginActivity, engagement_time_msec(_et)=1441577}]}
07-04 09:32:23.584 9287-13679/? V/FA-SVC: Upload scheduled in approximately ms: 1689228
07-04 09:32:23.604 9287-13679/? V/FA-SVC: Scheduling upload with GcmTaskService
07-04 09:32:23.604 9287-13679/? V/FA-SVC: Scheduling task with Gcm. time: 1689228
07-04 09:32:23.614 9287-13679/? V/FA-SVC: Background event processing time, ms: 119
07-04 09:32:23.664 9287-13679/? V/FA-SVC: Logging event: origin=auto,name=screen_view(_vs),params=Bundle[{firebase_previous_class(_pc)=LoginActivity, firebase_event_origin(_o)=auto, firebase_screen_id(_si)=-8935344662706588953, firebase_screen_class(_sc)=FragmentLoaderActivity, firebase_previous_id(_pi)=3960614141377066253}]
07-04 09:32:23.679 9287-13679/? V/FA-SVC: Saving event, name, data size: screen_view(_vs), 107
07-04 09:32:23.679 9287-13679/? V/FA-SVC: Event recorded: Event{appId='com.example.admin.gmcars', name='screen_view(_vs)', params=Bundle[{firebase_previous_class(_pc)=LoginActivity, firebase_event_origin(_o)=auto, firebase_screen_id(_si)=-8935344662706588953, firebase_screen_class(_sc)=FragmentLoaderActivity, firebase_previous_id(_pi)=3960614141377066253}]}
07-04 09:32:23.684 9287-13679/? V/FA-SVC: Upload scheduled in approximately ms: 1689129
07-04 09:32:23.689 9287-13679/? V/FA-SVC: Scheduling upload with GcmTaskService
07-04 09:32:23.689 9287-13679/? V/FA-SVC: Scheduling task with Gcm. time: 1689129
07-04 09:32:23.704 9287-13679/? V/FA-SVC: Background event processing time, ms: 42
07-04 09:32:27.579 3086-3086/com.example.admin.gmcars W/IInputConnectionWrapper: endBatchEdit on inactive InputConnection
07-04 09:32:28.524 3086-13677/com.example.admin.gmcars V/FA: Inactivity, disconnecting from the service
我希望输出的内容与我参加活动的情况相同
更新：
我正在使用导致应用程序崩溃的界面，我已经更新了代码。 如何从片段中使用它？
答案 0 :(得分：0)
您正在片段内部使用getFragmentManager（）
getFragmentManager().beginTransaction()
.replace(R.id.fragment_container, forgotPasscodeFragment)
.addToBackStack(null).commit();
替换为该代码
getChildFragmentManager().beginTransaction()
.replace(R.id.fragment_container, forgotPasscodeFragment)
.addToBackStack(null).commit();
答案 1 :(得分：0)
我解决了我的问题。问题不在于代码，而在于我的方法。我在片段中使用接口回调，这导致应用程序崩溃。当我在活动中使用回调方法时，一切正常。