I'm trying to retrieve the coordinates of the user from Firebase and display them in a RecyclerView as a log of all locations sent by users. However, the app is crashing. I already have a similar RecyclerView but all of the data being displayed is String.
My database structure:
{
"Blocked Users" : {
"RCX2HZXIwlSmMHFgDytf1DgZBgi2" : 0,
"rbHcHgUYb3R0WwwBa10OpXeba1T2" : 1
},
"User Location" : {
"RCX2HZXIwlSmMHFgDytf1DgZBgi2" : {
"latitude" : 35.2732867,
"longitude" : -118.9991467,
"timestamp" : 1639198720555
}
},
"Users" : {
"RCX2HZXIwlSmMHFgDytf1DgZBgi2" : {
"Alert Level" : "High",
"Emergency Type" : "Natural Disaster",
"address" : "Lapaz, Tarlac",
"emergencyNum" : "09123342345",
"lName" : "QWErty",
"name" : "Rrlac",
"phoneNum" : "09123234534",
"userTimestamp" : 1637648670269
}
}
}This is my Data class:
public class MainData {
String address, name, phoneNum, UID, lName;
Double latitude, longitude;
MainData () {};
public MainData(String address, String name, String phoneNum, String UID) {
this.address = address;
this.name = name;
this.phoneNum = phoneNum;
this.UID = UID;
this.lName = lName;
this.latitude = latitude;
this.longitude = longitude;
}
public String getlName() {
return lName;
}
public void setlName(String lName) {
this.lName = lName;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPhoneNum() {
return phoneNum;
}
public void setPhoneNum(String phoneNum) {
this.phoneNum = phoneNum;
}
public String getUID() {
return UID;
}
public void setUID(String UID) {
this.UID = UID;
}
public Double getLatitude() {
return latitude;
}
public void setLatitude(Double latitude) {
this.latitude = latitude;
}
public Double getLongitude() {
return longitude;
}
public void setLongitude(Double longitude) {
this.longitude = longitude;
}
}
This is my Adapter for the Location Log
public class MainAdapter2 extends FirebaseRecyclerAdapter<MainData, MainAdapter2.myViewHolder> {
@Override
protected void onBindViewHolder(@NonNull myViewHolder holder, @SuppressLint("RecyclerView") int position, @NonNull MainData model) {
holder.lName.setText(model.getlName());
holder.latitude.setText(model.getLatitude());
holder.longitude.setText(model.getLongitude());
Glide.with(holder.image.getContext())
.load(model.getlName())
.placeholder(R.drawable.common_google_signin_btn_icon_dark)
.circleCrop()
.error(R.drawable.btn_google_signin_dark_normal)
.into(holder.image);
}
@NonNull
@Override
public myViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item,parent,false);
return new myViewHolder(view);
}
public MainAdapter2(@NonNull FirebaseRecyclerOptions<MainData> mainDataFirebaseRecyclerOptions) {
super(mainDataFirebaseRecyclerOptions);
}
class myViewHolder extends RecyclerView.ViewHolder {
CircleImageView image;
TextView latitude, longitude, lName;
public myViewHolder(@NonNull View itemView) {
super(itemView);
image = (CircleImageView) itemView.findViewById(R.id.img1);
lName = (TextView) itemView.findViewById(R.id.nameText);
latitude = (TextView) itemView.findViewById(R.id.LatitudeText);
longitude = (TextView) itemView.findViewById(R.id.LongitudeText);
}
}
}
This is the code that gets the data from Firebase:
public class LocationLog extends AppCompatActivity {
RecyclerView recyclerView;
MainAdapter2 mainAdapter;
String uid = FirebaseAuth.getInstance().getUid();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_locationlog);
recyclerView = (RecyclerView) findViewById(R.id.locationList);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
FirebaseRecyclerOptions<MainData> mainDataFirebaseRecyclerOptions = new FirebaseRecyclerOptions.Builder<MainData>()
.setQuery(FirebaseDatabase.getInstance().getReference().child("User Location"), MainData.class)
.setQuery(FirebaseDatabase.getInstance().getReference().child("Users"), MainData.class)
.build();
mainAdapter = new MainAdapter2(mainDataFirebaseRecyclerOptions);
recyclerView.setAdapter(mainAdapter);
}
@Override
protected void onStart() {
super.onStart();
mainAdapter.startListening();
}
@Override
protected void onStop() {
super.onStop();
mainAdapter.stopListening();
}
}
The stacktrace:
2021-12-11 15:30:40.269 10220-10220/com.example.rescuealertadmin E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.rescuealertadmin, PID: 10220
com.google.firebase.database.DatabaseException: Failed to convert value of type java.lang.Double to String
at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.convertString(CustomClassMapper.java:426)
at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.deserializeToClass(CustomClassMapper.java:217)
at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.deserializeToType(CustomClassMapper.java:179)
at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.access$100(CustomClassMapper.java:48)
at com.google.firebase.database.core.utilities.encoding.CustomClassMapper$BeanMapper.deserialize(CustomClassMapper.java:593)
at com.google.firebase.database.core.utilities.encoding.CustomClassMapper$BeanMapper.deserialize(CustomClassMapper.java:563)
at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.convertBean(CustomClassMapper.java:433)
at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.deserializeToClass(CustomClassMapper.java:232)
at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.convertToCustomClass(CustomClassMapper.java:80)
at com.google.firebase.database.DataSnapshot.getValue(DataSnapshot.java:203)
at com.firebase.ui.database.ClassSnapshotParser.parseSnapshot(ClassSnapshotParser.java:29)
at com.firebase.ui.database.ClassSnapshotParser.parseSnapshot(ClassSnapshotParser.java:15)
at com.firebase.ui.common.BaseCachingSnapshotParser.parseSnapshot(BaseCachingSnapshotParser.java:36)
at com.firebase.ui.common.BaseObservableSnapshotArray.get(BaseObservableSnapshotArray.java:52)
at com.firebase.ui.database.FirebaseRecyclerAdapter.getItem(FirebaseRecyclerAdapter.java:109)
at com.firebase.ui.database.FirebaseRecyclerAdapter.onBindViewHolder(FirebaseRecyclerAdapter.java:149)
at androidx.recyclerview.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:7254)
at androidx.recyclerview.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:7337)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryBindViewHolderByDeadline(RecyclerView.java:6194)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:6460)
at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:6300)
at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:6296)
at androidx.recyclerview.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2330)
at androidx.recyclerview.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1631)
at androidx.recyclerview.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1591)
at androidx.recyclerview.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:668)
at androidx.recyclerview.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:4309)
at androidx.recyclerview.widget.RecyclerView.dispatchLayout(RecyclerView.java:4012)
at androidx.recyclerview.widget.RecyclerView.onLayout(RecyclerView.java:4578)
at android.view.View.layout(View.java:22844)
at android.view.ViewGroup.layout(ViewGroup.java:6389)
at androidx.constraintlayout.widget.ConstraintLayout.onLayout(ConstraintLayout.java:1873)
at android.view.View.layout(View.java:22844)
at android.view.ViewGroup.layout(ViewGroup.java:6389)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332)
at android.widget.FrameLayout.onLayout(FrameLayout.java:270)
at android.view.View.layout(View.java:22844)
at android.view.ViewGroup.layout(ViewGroup.java:6389)
at androidx.appcompat.widget.ActionBarOverlayLayout.onLayout(ActionBarOverlayLayout.java:536)
at android.view.View.layout(View.java:22844)
at android.view.ViewGroup.layout(ViewGroup.java:6389)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332)
2021-12-11 15:30:40.270 10220-10220/com.example.rescuealertadmin E/AndroidRuntime: at android.widget.FrameLayout.onLayout(FrameLayout.java:270)
at android.view.View.layout(View.java:22844)
at android.view.ViewGroup.layout(ViewGroup.java:6389)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1829)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1673)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1582)
at android.view.View.layout(View.java:22844)
at android.view.ViewGroup.layout(ViewGroup.java:6389)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332)
at android.widget.FrameLayout.onLayout(FrameLayout.java:270)
at com.android.internal.policy.DecorView.onLayout(DecorView.java:784)
at android.view.View.layout(View.java:22844)
at android.view.ViewGroup.layout(ViewGroup.java:6389)
at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:3470)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2938)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1952)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:8171)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:972)
at android.view.Choreographer.doCallbacks(Choreographer.java:796)
at android.view.Choreographer.doFrame(Choreographer.java:731)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:957)
at android.os.Handler.handleCallback(Handler.java:938)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
How should I convert the double values to string or is there any way to display the double values? Thank you.
CodePudding user response：
You just convert Double to String in onBindViewHolder
Like:
holder.latitude.setText(Double.toString(model.getLatitude()));
holder.longitude.setText(Double.toString(model.getLongitude()));
CodePudding user response：
You can use:
holder.latitude.setText( String.valueOf( model.getLatitude() ));
Or:
holder.latitude.setText( model.getLatitude() "" );