我有一个我购买的应用程序可供学习，我在Android Studio中遇到了一个奇怪的错误，不知道该转向何处。想到也许这里的一些大脑可以指出我正确的方向。我得到的错误是：
Error:(63, 10) error: cannot find symbol class UserData
Error:(72, 15) error: cannot find symbol variable UserData
Error:Execution failed for task ':app:compileReleaseJavaWithJavac'.
编译失败;有关详细信息，请参阅编译器错误输出。
DriverFragment.java部分也是指向错误的位置。如果需要，我在这里附上了代码。
package com.epbit.fragments;
import android.app.Activity;
import android.app.Dialog;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.content.res.Resources;
import android.net.Uri;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.widget.AdapterView;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import com.epbit.Fcm.CommonUtilities;
import com.epbit.alertspinner.iAm_CustomList;
import com.epbit.ccv3.MainActivity;
import com.epbit.ccv3.R;
import com.epbit.constants.AppConstants;
import com.epbit.constants.IWebConstant;
import com.epbit.latlong.LatLongDetails;
import com.epbit.login.LoginDetails;
import com.epbit.login.PassengerDetails;
import com.epbit.model.DriverDetails;
import com.epbit.services.ConfirmRejectCabService;
import com.epbit.services.DriverStatusUpdate;
import com.epbit.services.Driver_loc_update_task;
import com.epbit.services.GetDriverStatus;
import com.epbit.utils.GPSTracker;
import com.epbit.utils.WakeLocker;
public class DriverFragment extends BaseFragment implements View.OnClickListener {
private Context context;
boolean doubleBackToExitPressedOnce = false;
private GPSTracker gpsTracker;
private LatLongDetails driver_latlongobj = new LatLongDetails();
private LinearLayout statuslinearlayout, pass_detail_layout, button_layout,
details_layout, update_profile;
private TextView driverStatustextview, linear, pass_name, pass_num, pick_loc,
drop_loc, pick_date, pick_time, pick_time_left, pick_date_left, fare_value;
private ImageView driverStatusimageview, imageViewPhone;
public Dialog dialog;
public ListView list;
//DriverDetails driver_latlongobj = new DriverDetails();
ImageButton confirm_driver, reject_driver;
private boolean First_time_flage;
private String phoneNumber, first_time_tag = "first_time_flag";
private UserData userData;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View root = inflater.inflate(R.layout.fragment_driver, null);
((AppCompatActivity) getActivity()).getSupportActionBar().setTitle(R.string.cabbooking_driver);
try {
context = getActivity();
userData = UserData.getinstance(context);
DriverDetails.setDriverStatus("");
SharedPreferences myPreferences = context.getSharedPreferences("myprefreferences", 0);
statuslinearlayout = (LinearLayout) root.findViewById(R.id.driverstatusllid);
driverStatusimageview = (ImageView) root.findViewById(R.id.driverstatusimgid);
pass_detail_layout = (LinearLayout) root.findViewById(R.id.passenger_layout_id);
button_layout = (LinearLayout) root.findViewById(R.id.driver_buttons_linear_id);
pass_name = (TextView) root.findViewById(R.id.cust_name_dri);
pass_num = (TextView) root.findViewById(R.id.cust_num_dri);
pick_loc = (TextView) root.findViewById(R.id.pick_loc_dri);
drop_loc = (TextView) root.findViewById(R.id.drop_loc_dri);
pick_time = (TextView) root.findViewById(R.id.pick_time_dri);
pick_date = (TextView) root.findViewById(R.id.pick_date_dri);
fare_value = (TextView) root.findViewById(R.id.fare_value);
pick_date_left = (TextView) root.findViewById(R.id.pick_up_date_tex);
pick_time_left = (TextView) root.findViewById(R.id.pick_up_time_tex);
driverStatustextview = (TextView) root.findViewById(R.id.driverstatustextid);
imageViewPhone = (ImageView) root.findViewById(R.id.imageViewPhone);
confirm_driver = (ImageButton) root.findViewById(R.id.confirm_img_dri);
reject_driver = (ImageButton) root.findViewById(R.id.reject_img_dri);
details_layout = (LinearLayout) root.findViewById(R.id.details_layout);
update_profile = (LinearLayout) root.findViewById(R.id.updateprofile);
imageViewPhone.setOnClickListener(this);
setLinearLayoutOnClickListener(context, statuslinearlayout,
driverStatusimageview, driverStatustextview);
First_time_flage = myPreferences.getBoolean(first_time_tag, true);
if (First_time_flage) {
update_profile.setVisibility(View.VISIBLE);
First_time_flage = false;
SharedPreferences.Editor editor = myPreferences.edit();
editor.putBoolean(first_time_tag, First_time_flage);
editor.commit();
}
new GetDriverStatus(context, driverStatusimageview, driverStatustextview, statuslinearlayout).execute();
confirm_driver.setOnClickListener(this);
reject_driver.setOnClickListener(this);
} catch (Exception e) {
e.printStackTrace();
}
get_driver_location();
return root;
}
private LatLongDetails get_driver_location() {
gpsTracker = new GPSTracker(context);
LatLongDetails temp_latlongobj = new LatLongDetails();
if (gpsTracker.canGetLocation()) {
try {
temp_latlongobj.driver_latitude = gpsTracker.getLocation().getLatitude();
temp_latlongobj.driver_longitude = gpsTracker.getLocation().getLongitude();
} catch (Exception e) {
Toast.makeText(context, R.string.gps_not_enabled, Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
} else {
// gps.showSettingsAlert();
Log.d("Gps","null in driver activity");
}
return temp_latlongobj;
}
/**
* Receiving push messages
*/
private final BroadcastReceiver mHandleMessageReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
/*
* flag 1 to update driver location to the server
* flag 2 to show a
* message to driver to call its customer for ride later flag 3 to
* show that ride later booking is rejected flag 4 to show a message
* to call its customer for ride now flag 5 to show that ride now
* booking is rejected
*
*/
String flag = ""
+ intent.getExtras()
.getString(CommonUtilities.EXTRA_MESSAGE).charAt(0);
String newMessage = intent.getExtras()
.getString(CommonUtilities.EXTRA_MESSAGE).substring(1);
/* if (flag.contains("1")) {
// Waking up mobile if it is sleeping
try {
WakeLocker.acquire(context);
*//**
* Take appropriate action on this message depending upon your
* app requirement For now i am just displaying it on the screen
* *//*
driver_latlongobj = get_driver_location();
update_driverlocation(context, newMessage);
WakeLocker.release();
} catch (Exception e) {
e.printStackTrace();
}
}*/
if (flag.contains("2")) {
try {
int length = newMessage.split("]").length;
String data[] = new String[length];
data = newMessage.split("]");
for (int i = 0; i < data.length; i++) {
data[i] = data[i].replace("[", "");
Log.e("Data" + i, " " + data[i].toString());
}
PassengerDetails.passengername = data[0];
PassengerDetails.passengernumber = data[1];
PassengerDetails.passemger_pick_date = data[2];
PassengerDetails.passenger_pick_time = data[3];
PassengerDetails.passenger_pick_loc = data[4];
PassengerDetails.passenger_drop_loc = data[5];
LoginDetails.Unique_Table_ID = data[6];
userData.setUnique_Table_ID(data[6]);
PassengerDetails.fare = data[7];
details_layout.setVisibility(View.VISIBLE);
pass_detail_layout.setVisibility(View.VISIBLE);
button_layout.setVisibility(View.VISIBLE);
fare_value.setVisibility(View.VISIBLE);
pick_date_left.setVisibility(View.VISIBLE);
pick_time_left.setVisibility(View.VISIBLE);
pick_date.setVisibility(View.VISIBLE);
pick_time.setVisibility(View.VISIBLE);
pass_name.setText("" + PassengerDetails.passengername);
pass_num.setText("" + PassengerDetails.passengernumber);
pick_loc.setText("" + PassengerDetails.passenger_pick_loc);
drop_loc.setText("" + PassengerDetails.passenger_drop_loc);
pick_date.setText("" + PassengerDetails.passemger_pick_date);
pick_time.setText("" + PassengerDetails.passenger_pick_time);
fare_value.setText(context.getResources().getString(R.string.currency_sign)+" "+ PassengerDetails.fare);
driverStatusimageview.setImageResource(R.drawable.pending);
driverStatustextview.setText(R.string.pending_status);
DriverDetails.setDriverStatus("" + getResources().getString(R.string.pending_status));
new DriverStatusUpdate((Activity) context).execute();
} catch (Exception e) {
e.printStackTrace();
}
}
if (flag.contains("3")) {
try {
Toast.makeText(context, "" + newMessage, Toast.LENGTH_SHORT).show();
pass_detail_layout.setVisibility(View.INVISIBLE);
button_layout.setVisibility(View.INVISIBLE);
details_layout.setVisibility(View.INVISIBLE);
PassengerDetails.passengername = "";
PassengerDetails.passengernumber = "";
PassengerDetails.passemger_pick_date = "";
PassengerDetails.passenger_pick_time = "";
PassengerDetails.passenger_pick_loc = "";
PassengerDetails.passenger_drop_loc = "";
driverStatusimageview.setImageResource(R.drawable.available);
DriverDetails.setDriverStatus("" + getResources().getString(R.string.available_status));
driverStatustextview.setText(DriverDetails.getDriverStatus());
new DriverStatusUpdate((Activity) context).execute();
} catch (Exception e) {
e.printStackTrace();
}
}
if (flag.contains("4")) {
try {
int length = newMessage.split("]").length;
String data[] = new String[length];
data = newMessage.split("]");
for (int i = 0; i < data.length; i++) {
data[i] = data[i].replace("[", "");
Log.e("Data" + i, " " + data[i].toString());
}
PassengerDetails.passengername = data[0];
PassengerDetails.passengernumber = data[1];
PassengerDetails.passemger_pick_date = data[2];
PassengerDetails.passenger_pick_time = data[3];
PassengerDetails.passenger_pick_loc = data[4];
PassengerDetails.passenger_drop_loc = data[5];
LoginDetails.Unique_Table_ID = data[6];
userData.setUnique_Table_ID(data[6]);
PassengerDetails.fare = data[7];
pass_detail_layout.setVisibility(View.VISIBLE);
button_layout.setVisibility(View.VISIBLE);
pass_name.setText("" + PassengerDetails.passengername);
pass_num.setText("" + PassengerDetails.passengernumber);
pick_loc.setText("" + PassengerDetails.passenger_pick_loc);
drop_loc.setText("" + PassengerDetails.passenger_drop_loc);
pick_date_left.setVisibility(View.VISIBLE);
pick_time_left.setVisibility(View.VISIBLE);
details_layout.setVisibility(View.VISIBLE);
fare_value.setVisibility(View.VISIBLE);
pick_date.setVisibility(View.VISIBLE);
pick_date.setText("" + PassengerDetails.passemger_pick_date);
pick_time.setText("" + PassengerDetails.passenger_pick_time);
fare_value.setText(context.getResources().getString(R.string.currency_sign)+" "+ PassengerDetails.fare);
pick_time.setVisibility(View.VISIBLE);
driverStatusimageview.setImageResource(R.drawable.pending);
driverStatustextview.setText(R.string.pending_status);
DriverDetails.setDriverStatus("" + getResources().getString(R.string.pending));
new DriverStatusUpdate((Activity) context).execute();
} catch (Exception e) {
e.printStackTrace();
}
}
if (flag.contains("5")) {
try {
Toast.makeText(context, "" + newMessage, Toast.LENGTH_SHORT)
.show();
pass_detail_layout.setVisibility(View.INVISIBLE);
button_layout.setVisibility(View.INVISIBLE);
details_layout.setVisibility(View.INVISIBLE);
PassengerDetails.passengername = "";
PassengerDetails.passengernumber = "";
PassengerDetails.passemger_pick_date = "";
PassengerDetails.passenger_pick_time = "";
PassengerDetails.passenger_pick_loc = "";
PassengerDetails.passenger_drop_loc = "";
driverStatusimageview.setImageResource(R.drawable.available);
DriverDetails.setDriverStatus("" +getResources().getString(R.string.available_status));
driverStatustextview.setText(DriverDetails.getDriverStatus());
new DriverStatusUpdate((Activity) context).execute();
} catch (Exception e) {
e.printStackTrace();
}
}
if (flag.contains("7")) {
try {
Toast.makeText(context,""+newMessage,Toast.LENGTH_LONG).show();
/* driverStatusimageview.setImageResource(R.drawable.booked);
DriverDetails.setDriverStatus("" + R.string.booked_status);
driverStatustextview.setText(DriverDetails.getDriverStatus());
new DriverStatusUpdate((Activity) context).execute();
replaceFragment(context, new RideDetailsFragment());*/
} catch (Exception e) {
e.printStackTrace();
}
}
if (flag.contains("8")) {
try {
driverStatusimageview.setImageResource(R.drawable.booked);
DriverDetails.setDriverStatus("" + R.string.booked_status);
driverStatustextview.setText(DriverDetails.getDriverStatus());
new DriverStatusUpdate((Activity) context).execute();
replaceFragment(context, new RideDetailsFragment());
} catch (Exception e) {
e.printStackTrace();
}
}
if (flag.contains("a")) {
showDialogBox();
} else {
}
}
/* private void update_driverlocation(Context context, String newMessage) {
Driver_loc_update_task task = new Driver_loc_update_task(context,
newMessage);
if (newMessage.contains("@")) {
task.execute();
}
}*/
};
public void makeCall() {
try {
phoneNumber = "tel:" + PassengerDetails.passengernumber;
Intent callIntent = new Intent(Intent.ACTION_CALL, Uri.parse(phoneNumber));
context.startActivity(callIntent);
} catch (SecurityException e) {
e.printStackTrace();
}
}
public void showDialogBox() {
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(context);
alertDialogBuilder.setMessage(context.getResources().getString(R.string.cash_payment));
alertDialogBuilder.setPositiveButton("Ok",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface arg0, int arg1) {
}
});
alertDialogBuilder.setNegativeButton("Cancel",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface arg0, int arg1) {
}
});
AlertDialog alertDialog = alertDialogBuilder.create();
alertDialog.show();
}
@Override
protected void backPressed() {
try {
if (doubleBackToExitPressedOnce) {
try {
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
System.exit(0);
((MainActivity) getActivity()).finish();
android.os.Process.killProcess(android.os.Process.myPid());
super.onDestroy();
} catch (Exception e) {
e.printStackTrace();
}
return;
}
this.doubleBackToExitPressedOnce = true;
Toast.makeText(context, R.string.tap_again, Toast.LENGTH_SHORT).show();
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
public void onDestroy() {
/* if (mRegisterTask != null) {
mRegisterTask.cancel(true);
}*/
try {
context.unregisterReceiver(mHandleMessageReceiver);
} catch (Exception e) {
Log.e("UnRegister Receiver Error", "> " + e.getMessage());
}
super.onDestroy();
}
@Override
public void onPause() {
super.onPause();
}
@Override
public void onResume() {
try {
context.registerReceiver(mHandleMessageReceiver, new IntentFilter(
CommonUtilities.DISPLAY_MESSAGE_ACTION));
} catch (Exception e) {
e.printStackTrace();
}
super.onResume();
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.confirm_img_dri:
driverStatustextview.setText(R.string.booked_status);
driverStatusimageview.setImageResource(R.drawable.booked);
button_layout.setVisibility(View.INVISIBLE);
DriverDetails.setDriverStatus("" +getResources().getString(R.string.booked_status));
new DriverStatusUpdate(context).execute();
new ConfirmRejectCabService(getActivity(), 1, context)
.execute(IWebConstant.CONFIRM);
break;
case R.id.reject_img_dri:
Toast.makeText(context, R.string.please_wait,
Toast.LENGTH_SHORT).show();
details_layout.setVisibility(View.INVISIBLE);
pass_detail_layout.setVisibility(View.INVISIBLE);
button_layout.setVisibility(View.INVISIBLE);
driverStatustextview.setText(R.string.available_status);
driverStatusimageview.setImageResource(R.drawable.available);
DriverDetails.setDriverStatus("" + getResources().getString(R.string.available_status));
new DriverStatusUpdate(context).execute();
new ConfirmRejectCabService(getActivity(), 1, context).execute(IWebConstant.REJECT);
break;
case R.id.imageViewPhone:
makeCall();
default:
break;
}
}
private void setLinearLayoutOnClickListener(final Context context,
LinearLayout statuslinearlayout,
final ImageView driverStatusimageview,
final TextView driverStatustextview) {
statuslinearlayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
dialog = new Dialog(context);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setContentView(R.layout.iamlistspinner);
dialog.setTitle("I am .....");
iAm_CustomList listAdapter = new iAm_CustomList(
(Activity) context, AppConstants.catgories,
AppConstants.imageids);
list = (ListView) dialog.findViewById(R.id.iam_listview);
list.setAdapter(listAdapter);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
switch (position) {
case 0:
driverStatustextview.setText(R.string.available_status);
driverStatusimageview.setImageResource(R.drawable.available);
DriverDetails.setDriverStatus("" +getResources().getString(R.string.available_status));
break;
case 1:
driverStatustextview.setText(R.string.booked_status);
driverStatusimageview.setImageResource(R.drawable.booked);
DriverDetails.setDriverStatus("" + getResources().getString(R.string.booked_status));
break;
case 2:
driverStatustextview.setText(R.string.dnd_status);
driverStatusimageview.setImageResource(R.drawable.dnd);
DriverDetails.setDriverStatus("" + getResources().getString(R.string.dnd_status));
break;
}
new DriverStatusUpdate((Activity) context).execute("");
Log.e("Item clicked at ", "" + position);
dialog.dismiss();
}
});
dialog.show();
}
});
}
}
答案 0 :(得分：0)
问题是您正在创建UserData =＆gt;类型的全局变量userData。 ＆＃34;私人UserData userData;＆＃34; 要做到这一点，你必须做到以下几点：
1.确保您的包中有一个名为userData的类 2.在driverFragment类中导入它 3.检查您使用该UserData类并在其中导入的任何类。