我已经使用uid从firebase检索所有数据，但这不起作用
这是我的MyAccountFragment代码：-
public class MyAccountFragment extends Fragment {
DatabaseReference ref;
FirebaseAuth auth;
FirebaseUser user= FirebaseAuth.getInstance().getCurrentUser();
Toolbar toolbar;
Button update;
int b;
EditText acc_name,acc_mobile,acc_email,acc_dob,acc_gender,acc_city,acc_state,acc_sml,acc_syp,acc_lic_no,acc_car_number,acc_car_color,acc_car_model;
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view =inflater.inflate(R.layout.fragment_myaccount,container,false);
toolbar = view.findViewById(R.id.toolbar);
super.onCreate(savedInstanceState);
acc_name=view.findViewById(R.id.acc_name);
acc_mobile=view.findViewById(R.id.acc_mobile);
acc_email=view.findViewById(R.id.acc_email);
acc_dob=view.findViewById(R.id.acc_dob);
acc_gender=view.findViewById(R.id.acc_gender);
acc_city=view.findViewById(R.id.acc_city);
acc_state=view.findViewById(R.id.acc_state);
acc_sml=view.findViewById(R.id.acc_sml);
acc_syp=view.findViewById(R.id.acc_syp);
acc_lic_no=view.findViewById(R.id.acc_lic_no);
acc_car_color=view.findViewById(R.id.acc_car_color);
acc_car_number=view.findViewById(R.id.acc_car_number);
acc_car_model=view.findViewById(R.id.acc_car_model);
// update=view.findViewById(R.id.update);
ref= FirebaseDatabase.getInstance().getReference(uid);
Log.i(TAG, "teena : "+ref);
ref.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
Map<String, String> map = (Map<String, String>) dataSnapshot.getValue();
String name=map.get("name1");//error goes here
String email=map.get("emailid1");
String phone=map.get("phone1");
String dob=map.get("dob1");
String gender=map.get("gender2");
String city=map.get("address1");
String state=map.get("state1");
String sml=map.get("sharelocmobile1");
String preference=map.get("preference1");
String license=map.get("lic_no1");
String car_number=map.get("car_number1");
String car_colour=map.get("car_colour1");
String car_model=map.get("car_model1");
acc_name.setText(Html.fromHtml("<font><b>" + "NAME : " + "</b></font>" +name));
acc_email.setText(Html.fromHtml("<font><b>" + "EMAIL : "+ "</b></font>"+email));
acc_mobile.setText(Html.fromHtml("<font><b>" + "MOBILE No. : "+ "</b></font>"+phone));
acc_dob.setText(Html.fromHtml("<font><b>" + "DOB : "+ "</b></font>"+dob));
acc_gender.setText(Html.fromHtml("<font><b>" + "GENDER : "+ "</b></font>"+gender));
acc_city.setText(Html.fromHtml("<font><b>" + "CITY : "+ "</b></font>"+city));
acc_state.setText(Html.fromHtml("<font><b>" + "STATE : "+ "</b></font>"+state));
acc_sml.setText(Html.fromHtml("<font><b>" + "SHARING MOBILE No. : "+ "</b></font>"+sml));
acc_syp.setText(Html.fromHtml("<font><b>" + "YOUR PREFERENCE : "+ "</b></font>"+preference));
acc_lic_no.setText(Html.fromHtml("<font><b>" + "LICENSE No. : "+ "</b></font>"+license));
acc_car_color.setText(Html.fromHtml("<font><b>" + "CAR COLOUR : "+ "</b></font>"+car_colour));
acc_car_model.setText(Html.fromHtml("<font><b>" + "CAR MODEL : "+ "</b></font>"+car_model));
acc_car_number.setText(Html.fromHtml("<font><b>" + "CAR NUMBER : "+ "</b></font>"+car_number));
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
Log.i(TAG,"Error occured in connecting with database");
}
});
return view;
}
这是我的Logcat：-
java.lang.NullPointerException: Attempt to invoke interface method 'java.lang.Object java.util.Map.get(java.lang.Object)' on a null object reference
at com.sahayatra.samyatra.MyAccountFragment$1.onDataChange(MyAccountFragment.java:68)
at com.google.firebase.database.core.ValueEventRegistration.fireEvent(com.google.firebase:firebase-database@@16.0.5:75)
at com.google.firebase.database.core.view.DataEvent.fire(com.google.firebase:firebase-database@@16.0.5:63)
at com.google.firebase.database.core.view.EventRaiser$1.run(com.google.firebase:firebase-database@@16.0.5:55)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6816)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1563)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1451)
2天前通过这种方法检索数据，但现在不是
这是我的User Class代码：
public class User2 {
public String phone1;
public String name1;
public String emailid1;
public String dob1;
public String address1;
public String state1;
public String occupation1;
public String car_number1;
public String car_model1;
public String car_colour1;
public String lic_no1;
public String sharelocmobile1;
public String gender2;
public String preference1;
public String profile_picture_url1,fromo,too,time1,name2,phone2,sign_up_number1;
// Default constructor required for calls to
// DataSnapshot.getValue(User.class)
public User2(){
}
public User2(EditText editTextPhone, EditText name, EditText emailid, EditText dob, EditText address, EditText state, EditText occupation, EditText car_number, EditText car_model, EditText car_colour, EditText lic_no, EditText sharelocmobile, String gender1, String preference, Uri downloadUri) {
phone1 = editTextPhone.getText().toString();
name1 = name.getText().toString();
emailid1 = emailid.getText().toString();
dob1 = dob.getText().toString();
address1 = address.getText().toString();
state1 = state.getText().toString();
occupation1 = occupation.getText().toString();
car_number1 = car_number.getText().toString();
car_model1 = car_model.getText().toString();
car_colour1 = car_colour.getText().toString();
lic_no1 = lic_no.getText().toString();
sharelocmobile1 = sharelocmobile.getText().toString();
this.gender2 = gender1;
this.preference1 = preference;
profile_picture_url1 = downloadUri.toString();
}
public User2(EditText from2,EditText to2,EditText editTextPhone, EditText name,EditText time2){
fromo = from2.getText().toString();
too=to2.getText().toString();
phone1 = editTextPhone.getText().toString();
name1 = name.getText().toString();
time1=time2.getText().toString();
}
public User2(String name,String phone,String sign_up_number0)
{
this.name2=name;
this.phone2=phone;
this.sign_up_number1=sign_up_number0;
}
}
我已经追溯了我的每一步，但是无法提出解决方案
任何帮助将不胜感激 谢谢！