I am trying to display my data from firebase real time database on a listview in the main menu screen once the users log in. The app is running but its not displaying the data.
This is the data in my database
Now for the codes.
MainMenu.java This function is called on the OnCreate().
public void makeItem ()
{
lv = findViewById(R.id.listView);
db = FirebaseDatabase.getInstance().getReference();
helper = new FirebaseHelper(db);
adapter= new AdapterItem(this,helper.retrive());
lv.setAdapter(adapter);
}
CustomListAdapter.java
public class CustomListAdapter{
private String ItemName;
private String Quantity;
private String SerialNo;
private String SupplierName;
private String SupplierEmail;
private String SupplierPhone;
public CustomListAdapter(){
}
public CustomListAdapter (String ItemName,String Quantity,String SerialNo,String SupplierName,String SupplierEmail,String SupplierPhone)
{
this.ItemName = ItemName;
this.Quantity = Quantity;
this.SerialNo = SerialNo;
this.SupplierName = SupplierName;
this.SupplierEmail = SupplierEmail;
this.SupplierPhone = SupplierPhone;
}
public void setItemName (String ItemName)
{
this.ItemName = ItemName;
}
public String getItemName ()
{
return ItemName;
}
public void setQuantity (String Quantity)
{
this.Quantity = Quantity;
}
public String getQuantity ()
{
return Quantity;
}
public void setSerialNo (String SerialNo)
{
this.SerialNo = SerialNo;
}
public String getSerialNo ()
{
return SerialNo;
}
public void setSupplierName (String SupplierName)
{
this.SupplierName = SupplierName;
}
public String getSupplierName()
{
return SupplierName;
}
public void setSupplierEmail (String SupplierEmail)
{
this.SupplierEmail = SupplierEmail;
}
public String getSupplierEmail() {
return SupplierEmail;
}
public void setSupplierPhone (String SupplierPhone)
{
this.SupplierPhone = SupplierPhone;
}
public String getSupplierPhone() {
return SupplierPhone;
}
}
AdapterItem.java
public class AdapterItem extends BaseAdapter {
Context c;
ArrayList<CustomListAdapter> customListAdapters;
public AdapterItem(Context c, ArrayList<CustomListAdapter> customListAdapters) {
this.c = c;
this.customListAdapters = customListAdapters;
}
#Override
public int getCount() {
return customListAdapters.size();
}
#Override
public Object getItem(int position) {
return customListAdapters.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
if(convertView==null)
{
convertView=LayoutInflater.from(c).inflate(R.layout.content_main_menu_list,parent,false);
}
TextView ItemName = convertView.findViewById(R.id.name);
TextView SerialNo = convertView.findViewById(R.id.serialNo);
TextView SupplierName = convertView.findViewById(R.id.supplierName);
TextView amount = convertView.findViewById(R.id.amount);
final CustomListAdapter CLA = (CustomListAdapter) this.getItem(position);
ItemName.setText(CLA.getItemName());
SerialNo.setText(CLA.getSerialNo());
SupplierName.setText(CLA.getSupplierName());
amount.setText(CLA.getQuantity());
convertView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(c,CLA.getItemName(),Toast.LENGTH_SHORT).show();
}
});
return convertView;
}
}
content_main_menu.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:showIn="#layout/app_bar_main_menu">
<ListView
android:id="#+id/listView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_marginStart="0dp"
android:layout_marginTop="0dp" />
content_main_menu_list.xml is a custom layout that i created for every data set to be displayed.
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
xmlns:app="http://schemas.android.com/apk/res-auto">
<android.support.constraint.ConstraintLayout
android:layout_width="0dp"
android:layout_height="100dp"
android:layout_marginStart="8dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<TextView
android:id="#+id/amount"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:text="TextView"
android:textSize="20sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" />
<TextView
android:id="#+id/serialNo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="10dp"
android:layout_marginTop="8dp"
android:layout_marginBottom="8dp"
android:text="TextView"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/supplierName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:text="TextView"
app:layout_constraintTop_toBottomOf="#+id/serialNo" />
<TextView
android:id="#+id/name"
android:layout_width="wrap_content"
android:layout_height="23dp"
android:layout_marginBottom="8dp"
android:text="Medium Text"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#0171B0"
app:layout_constraintBottom_toTopOf="#+id/serialNo" />
</android.support.constraint.ConstraintLayout>
</android.support.constraint.ConstraintLayout>
The problem in your code lies in the fact that you have in your CustomListAdapter class a field named ItemName but you are using a getter named getItemName(), which is not correct since Firebase is looking in the database for a field named itemName and not ItemName. See the lowercase i letter vs. capital letter I?
There are two ways in which you can solve this problem. The first one would be to change your model class by renaming the fields according to the Java Naming Conventions. So you model class should look like this:
public class CustomListAdapter {
private String itemName, quantity, serialNo, supplierName, supplierEmail, supplierPhone;
public CustomListAdapter() {}
public CustomListAdapter(String itemName, String quantity, String serialNo, String supplierName, String supplierEmail, String supplierPhone) {
this.itemName = itemName;
this.quantity = quantity;
this.serialNo = serialNo;
this.supplierName = supplierName;
this.supplierEmail = supplierEmail;
this.supplierPhone = supplierPhone;
}
public String getItemName() { return itemName; }
public String getQuantity() { return quantity; }
public String getSerialNo() { return serialNo; }
public String getSupplierName() { return supplierName; }
public String getSupplierEmail() { return supplierEmail; }
public String getSupplierPhone() { return supplierPhone; }
}
See in this example, there are private fields and public getters. There is also a simpler solution, to set the value directly on public fields like this:
public class CustomListAdapter {
public String itemName, quantity, serialNo, supplierName, supplierEmail, supplierPhone;
}
Now just remove the current data and add it again using the correct names. This solution will work only if you are in testing phase.
There is also the second approach, which is to use annotations. So if you prefer to use private fields and public getters, you should use the PropertyName annotation only in front of the getter. So your CustomListAdapter class should look like this:
public class CustomListAdapter {
private String ItemName;
private String Quantity;
private String SerialNo;
private String SupplierName;
private String SupplierEmail;
private String SupplierPhone;
public CustomListAdapter() {}
public CustomListAdapter(String itemName, String quantity, String serialNo, String supplierName, String supplierEmail, String supplierPhone) {
ItemName = itemName;
Quantity = quantity;
SerialNo = serialNo;
SupplierName = supplierName;
SupplierEmail = supplierEmail;
SupplierPhone = supplierPhone;
}
#PropertyName("ItemName")
public String getItemName() { return ItemName; }
#PropertyName("Quantity")
public String getQuantity() { return Quantity; }
#PropertyName("SerialNo")
public String getSerialNo() { return SerialNo; }
#PropertyName("SupplierName")
public String getSupplierName() { return SupplierName; }
#PropertyName("SupplierEmail")
public String getSupplierEmail() { return SupplierEmail; }
#PropertyName("SupplierPhone")
public String getSupplierPhone() { return SupplierPhone; }
}
Related
I want to list the cities and their temperatures with the recyclerview via the api, but I can't see the data. I'm new to this, can you help me?
My Code:
public class MainActivity extends AppCompatActivity {
public static String apikey = "blablabla";
public static String lan = "55.5";
public static String lon="37.5";
public static String cnt="10";
private List<CountryData> list;
SearchView searchView;
RecyclerView countries;
TextView countryName, temperature;
ImageView image;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
searchView = (SearchView) findViewById(R.id.searchView);
countries = (RecyclerView) findViewById(R.id.countries);
countryName = (TextView) findViewById(R.id.countryName);
temperature = (TextView) findViewById(R.id.temperature);
image = (ImageView) findViewById(R.id.image);
list = new ArrayList<>();
countries = findViewById(R.id.countries);
countries.setLayoutManager(new LinearLayoutManager(this));
countries.setHasFixedSize(true);
Adapter adapter = new Adapter(this, list);
countries.setAdapter(adapter);
ApiUtilities.getApiInterface().getCountryData(lan,lon,cnt,apikey).enqueue(new Callback<List<CountryData>>(){
#Override
public void onResponse(Call<List<CountryData>> call, Response<List<CountryData>> response) {
if (response.code() == 200) {
RetrofitModel retrofitModel = (RetrofitModel) response.body();
assert retrofitModel != null;
double temp = retrofitModel.main.temp - 273.15;
int tempToInt = (int) temp;
String country = retrofitModel.sys.country;
for(int i=0; i<list.size(); i++){
countryName.setText(country);
}
String temperatures = tempToInt + "°C";
temperature.setText(temperatures);
}
}
#Override
public void onFailure(Call<List<CountryData>> call, Throwable t) {
}
});
}
}
API CONTROLLER
public interface APIController {
String BASE_URL = "https://api.openweathermap.org/data/2.5/";
#GET("find?lat=55.5&lon=37.5&cnt=10&appid=3f8c9db425f5691cb59026f85546237e")
//Call<List<CountryData>> getCountryData();
Call<List<CountryData>> getCountryData(#Query("lat") String lat, #Query("lon") String lon, #Query("cnt") String cnt , #Query("APIKey") String apiKey);
}
RETROFİT MODEL
class RetrofitModel {
#SerializedName("list")
private String list;
private String country;
private String name;
private String temp;
#SerializedName("coord")
public Coord coord;
#SerializedName("sys")
public Sys sys;
#SerializedName("weather")
public ArrayList<Weather> weather = new ArrayList<Weather>();
#SerializedName("main")
public Main main;
public String getList() {
return list;
}
public void setList(String list) {
this.list = list;
}
public String getCountry() {
return country;
}
public void setCountry(String country) {
this.country = country;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getTemp() {
return temp;
}
public void setTemp(String temp) {
this.temp = temp;
}
public Coord getCoord() {
return coord;
}
public void setCoord(Coord coord) {
this.coord = coord;
}
public Sys getSys() {
return sys;
}
public void setSys(Sys sys) {
this.sys = sys;
}
public ArrayList<Weather> getWeather() {
return weather;
}
public void setWeather(ArrayList<Weather> weather) {
this.weather = weather;
}
public Main getMain() {
return main;
}
public void setMain(Main main) {
this.main = main;
}
public RetrofitModel(String list, String country, String name, String temp, Coord coord, Sys sys, ArrayList<Weather> weather, Main main) {
this.list = list;
this.country = country;
this.name = name;
this.temp = temp;
this.coord = coord;
this.sys = sys;
this.weather = weather;
this.main = main;
}
}
class Weather {
#SerializedName("id")
public int id;
#SerializedName("main")
public String main;
}
class Main {
#SerializedName("temp")
public float temp;
}
class Sys {
#SerializedName("country")
public String country;
public Sys(String country) {
this.country = country;
}
public String getCountry() {
return country;
}
public void setCountry(String country) {
this.country = country;
}
}
class Coord {
#SerializedName("lon")
public float lon;
#SerializedName("lat")
public float lat;
}
COUNTRY DATA
public class CountryData {
#SerializedName("list")
private String list;
private String country;
private String name;
private String temp;
public CountryData(String list, String country, String name, String temp) {
this.list = list;
this.country = country;
this.name = name;
this.temp = temp;
}
public String getList() {
return list;
}
public void setList(String list) {
this.list = list;
}
public String getCountry() {
return country;
}
public void setCountry(String country) {
this.country = country;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getTemp() {
return temp;
}
public void setTemp(String temp) {
this.temp = temp;
}
}
XML CODES
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
android:orientation="vertical">
<SearchView
android:id="#+id/searchView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
<ImageView
android:id="#+id/image"
android:layout_width="match_parent"
android:layout_height="200dp"
android:src="#drawable/weather"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginVertical="12dp"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_marginStart="30dp"
android:textColor="#color/black"
android:text="Country Name"
android:textSize="15dp" ></TextView>
<TextView
android:layout_width="wrap_content"
android:layout_height="40dp"
android:layout_alignParentEnd="true"
android:layout_marginEnd="30dp"
android:text="Temperature"
androi
d:textColor="#color/black"
android:textSize="15dp" >
</RelativeLayout>
<androidx.recyclerview.widget.RecyclerView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/countries"
tools:listitem="#layout/country_item_layout"
app:layoutManager="LinearLayoutManager"
/>
<?xml version="1.0" encoding="utf-8"?>
<com.google.android.material.card.MaterialCardView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:app="http://schemas.android.com/apk/res-auto"
app:cardElevation="3dp"
android:layout_marginHorizontal="8dp"
android:layout_marginTop="8dp"
>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginVertical="7dp"
android:layout_marginHorizontal="15dp">
<TextView
android:id="#+id/countryName"
android:layout_width="wrap_content"
android:layout_height="40dp"
android:layout_alignParentStart="true"
android:layout_marginEnd="30dp"
android:textColor="#color/black"
android:text="Türkiye"
android:layout_centerVertical="true"
android:gravity="center"
android:textSize="15dp" ></TextView>
<TextView
android:id="#+id/temperature"
android:layout_width="wrap_content"
android:layout_height="40dp"
android:layout_alignParentEnd="true"
android:layout_marginEnd="30dp"
android:textColor="#color/black"
android:text="Temperature"
android:layout_centerVertical="true"
android:gravity="center"
android:textSize="15dp" ></TextView>
</RelativeLayout>
</com.google.android.material.card.MaterialCardView>
hello, I want to list the cities and their temperatures with the recyclerview via the api, but I can't see the data. I'm new to this, can you help me?
You can easy to implement in Volley
implementation 'com.android.volley:volley:1.2.0'
In Java Code:
queue = Volley.newRequestQueue(this); // RequestQueue
String url = "https://api.openweathermap.org/data/2.5/find?lat=55.5&lon=37.5&cnt=10&appid=3f8c9db425f5691cb59026f85546237e";
JsonObjectRequest request = new JsonObjectRequest(Request.Method.GET, url, null,
new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
try {
JSONArray jsonArray = response.getJSONArray("list");
for (int i = 0 ; i<jsonArray.length() ; i++){
JSONObject jsonObject = jsonArray.getJSONObject(i);
String id = jsonObject.getString("id");
String name = jsonObject.getString("name");
resultText.append("ID : " + id + "\nName : " + name + "\n\n"); // TextView
}
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
error.printStackTrace();
}}
) ;
queue.add(request);
Output:
I am trying to display my data from firebase real time database on a listview in the main menu screen once the users log in. The app is running but its not displaying the data.
This is the data in my database
Now for the codes.
MainMenu.java This function is called on the OnCreate().
public void makeItem ()
{
lv = findViewById(R.id.listView);
db = FirebaseDatabase.getInstance().getReference();
helper = new FirebaseHelper(db);
adapter= new AdapterItem(this,helper.retrive());
lv.setAdapter(adapter);
}
CustomListAdapter.java
public class CustomListAdapter{
private String ItemName;
private String Quantity;
private String SerialNo;
private String SupplierName;
private String SupplierEmail;
private String SupplierPhone;
public CustomListAdapter(){
}
public CustomListAdapter (String ItemName,String Quantity,String SerialNo,String SupplierName,String SupplierEmail,String SupplierPhone)
{
this.ItemName = ItemName;
this.Quantity = Quantity;
this.SerialNo = SerialNo;
this.SupplierName = SupplierName;
this.SupplierEmail = SupplierEmail;
this.SupplierPhone = SupplierPhone;
}
public void setItemName (String ItemName)
{
this.ItemName = ItemName;
}
public String getItemName ()
{
return ItemName;
}
public void setQuantity (String Quantity)
{
this.Quantity = Quantity;
}
public String getQuantity ()
{
return Quantity;
}
public void setSerialNo (String SerialNo)
{
this.SerialNo = SerialNo;
}
public String getSerialNo ()
{
return SerialNo;
}
public void setSupplierName (String SupplierName)
{
this.SupplierName = SupplierName;
}
public String getSupplierName()
{
return SupplierName;
}
public void setSupplierEmail (String SupplierEmail)
{
this.SupplierEmail = SupplierEmail;
}
public String getSupplierEmail() {
return SupplierEmail;
}
public void setSupplierPhone (String SupplierPhone)
{
this.SupplierPhone = SupplierPhone;
}
public String getSupplierPhone() {
return SupplierPhone;
}
}
AdapterItem.java
public class AdapterItem extends BaseAdapter {
Context c;
ArrayList<CustomListAdapter> customListAdapters;
public AdapterItem(Context c, ArrayList<CustomListAdapter> customListAdapters) {
this.c = c;
this.customListAdapters = customListAdapters;
}
#Override
public int getCount() {
return customListAdapters.size();
}
#Override
public Object getItem(int position) {
return customListAdapters.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
if(convertView==null)
{
convertView=LayoutInflater.from(c).inflate(R.layout.content_main_menu_list,parent,false);
}
TextView ItemName = convertView.findViewById(R.id.name);
TextView SerialNo = convertView.findViewById(R.id.serialNo);
TextView SupplierName = convertView.findViewById(R.id.supplierName);
TextView amount = convertView.findViewById(R.id.amount);
final CustomListAdapter CLA = (CustomListAdapter) this.getItem(position);
ItemName.setText(CLA.getItemName());
SerialNo.setText(CLA.getSerialNo());
SupplierName.setText(CLA.getSupplierName());
amount.setText(CLA.getQuantity());
convertView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(c,CLA.getItemName(),Toast.LENGTH_SHORT).show();
}
});
return convertView;
}
}
content_main_menu.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:showIn="#layout/app_bar_main_menu">
<ListView
android:id="#+id/listView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_marginStart="0dp"
android:layout_marginTop="0dp" />
content_main_menu_list.xml is a custom layout that i created for every data set to be displayed.
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
xmlns:app="http://schemas.android.com/apk/res-auto">
<android.support.constraint.ConstraintLayout
android:layout_width="0dp"
android:layout_height="100dp"
android:layout_marginStart="8dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<TextView
android:id="#+id/amount"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:text="TextView"
android:textSize="20sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" />
<TextView
android:id="#+id/serialNo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="10dp"
android:layout_marginTop="8dp"
android:layout_marginBottom="8dp"
android:text="TextView"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/supplierName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:text="TextView"
app:layout_constraintTop_toBottomOf="#+id/serialNo" />
<TextView
android:id="#+id/name"
android:layout_width="wrap_content"
android:layout_height="23dp"
android:layout_marginBottom="8dp"
android:text="Medium Text"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#0171B0"
app:layout_constraintBottom_toTopOf="#+id/serialNo" />
</android.support.constraint.ConstraintLayout>
</android.support.constraint.ConstraintLayout>
The problem in your code lies in the fact that you have in your CustomListAdapter class a field named ItemName but you are using a getter named getItemName(), which is not correct since Firebase is looking in the database for a field named itemName and not ItemName. See the lowercase i letter vs. capital letter I?
There are two ways in which you can solve this problem. The first one would be to change your model class by renaming the fields according to the Java Naming Conventions. So you model class should look like this:
public class CustomListAdapter {
private String itemName, quantity, serialNo, supplierName, supplierEmail, supplierPhone;
public CustomListAdapter() {}
public CustomListAdapter(String itemName, String quantity, String serialNo, String supplierName, String supplierEmail, String supplierPhone) {
this.itemName = itemName;
this.quantity = quantity;
this.serialNo = serialNo;
this.supplierName = supplierName;
this.supplierEmail = supplierEmail;
this.supplierPhone = supplierPhone;
}
public String getItemName() { return itemName; }
public String getQuantity() { return quantity; }
public String getSerialNo() { return serialNo; }
public String getSupplierName() { return supplierName; }
public String getSupplierEmail() { return supplierEmail; }
public String getSupplierPhone() { return supplierPhone; }
}
See in this example, there are private fields and public getters. There is also a simpler solution, to set the value directly on public fields like this:
public class CustomListAdapter {
public String itemName, quantity, serialNo, supplierName, supplierEmail, supplierPhone;
}
Now just remove the current data and add it again using the correct names. This solution will work only if you are in testing phase.
There is also the second approach, which is to use annotations. So if you prefer to use private fields and public getters, you should use the PropertyName annotation only in front of the getter. So your CustomListAdapter class should look like this:
public class CustomListAdapter {
private String ItemName;
private String Quantity;
private String SerialNo;
private String SupplierName;
private String SupplierEmail;
private String SupplierPhone;
public CustomListAdapter() {}
public CustomListAdapter(String itemName, String quantity, String serialNo, String supplierName, String supplierEmail, String supplierPhone) {
ItemName = itemName;
Quantity = quantity;
SerialNo = serialNo;
SupplierName = supplierName;
SupplierEmail = supplierEmail;
SupplierPhone = supplierPhone;
}
#PropertyName("ItemName")
public String getItemName() { return ItemName; }
#PropertyName("Quantity")
public String getQuantity() { return Quantity; }
#PropertyName("SerialNo")
public String getSerialNo() { return SerialNo; }
#PropertyName("SupplierName")
public String getSupplierName() { return SupplierName; }
#PropertyName("SupplierEmail")
public String getSupplierEmail() { return SupplierEmail; }
#PropertyName("SupplierPhone")
public String getSupplierPhone() { return SupplierPhone; }
}
I want to retrieve user details from an API, but when i place the text in a textview, it becomes blank.
My Object class
public class Obj {
/**
* settings : {"success":"1","message":"You have successfully logged in.","fields":["user_id","email","status","profile_image","access_token","phone","user_name","plate_number","state_id","state","is_social","is_notification_enabled","search_report_count","remove_add"]}
* data : [{"user_id":"108","email":"jk#grr.la","status":"Active","profile_image":"http://locateaplate.projectspreview.net/public/upload/profile_images/978307200_0-20190515152207782279.png","access_token":"144d44efa92327ed0c1b6d98bb866563a7cc95680c136603bbf0eca4832da635","phone":"","user_name":"Jack Kalsan","plate_number":"ABC1234","state_id":"2722","state":"Abakan","is_social":"","is_notification_enabled":"Yes","search_report_count":"69","remove_add":"0"}]
*/
private SettingsBean settings;
private List<DataBean> data;
public SettingsBean getSettings() {
return settings;
}
public void setSettings(SettingsBean settings) {
this.settings = settings;
}
public List<DataBean> getData() {
return data;
}
public void setData(List<DataBean> data) {
this.data = data;
}
public static class SettingsBean {
/**
* success : 1
* message : You have successfully logged in.
* fields : ["user_id","email","status","profile_image","access_token","phone","user_name","plate_number","state_id","state","is_social","is_notification_enabled","search_report_count","remove_add"]
*/
private String success;
private String message;
private List<String> fields;
public String getSuccess() {
return success;
}
public void setSuccess(String success) {
this.success = success;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public List<String> getFields() {
return fields;
}
public void setFields(List<String> fields) {
this.fields = fields;
}
}
public static class DataBean {
/**
* user_id : 108
* email : jk#grr.la
* status : Active
* profile_image : http://locateaplate.projectspreview.net/public/upload/profile_images/978307200_0-20190515152207782279.png
* access_token : 144d44efa92327ed0c1b6d98bb866563a7cc95680c136603bbf0eca4832da635
* phone :
* user_name : Jack Kalsan
* plate_number : ABC1234
* state_id : 2722
* state : Abakan
* is_social :
* is_notification_enabled : Yes
* search_report_count : 69
* remove_add : 0
*/
private String user_id;
private String email;
private String status;
private String profile_image;
private String access_token;
private String phone;
private String user_name;
private String plate_number;
private String state_id;
private String state;
private String is_social;
private String is_notification_enabled;
private String search_report_count;
private String remove_add;
public String getUser_id() {
return user_id;
}
public void setUser_id(String user_id) {
this.user_id = user_id;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public String getProfile_image() {
return profile_image;
}
public void setProfile_image(String profile_image) {
this.profile_image = profile_image;
}
public String getAccess_token() {
return access_token;
}
public void setAccess_token(String access_token) {
this.access_token = access_token;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public String getUser_name() {
return user_name;
}
public void setUser_name(String user_name) {
this.user_name = user_name;
}
public String getPlate_number() {
return plate_number;
}
public void setPlate_number(String plate_number) {
this.plate_number = plate_number;
}
public String getState_id() {
return state_id;
}
public void setState_id(String state_id) {
this.state_id = state_id;
}
public String getState() {
return state;
}
public void setState(String state) {
this.state = state;
}
public String getIs_social() {
return is_social;
}
public void setIs_social(String is_social) {
this.is_social = is_social;
}
public String getIs_notification_enabled() {
return is_notification_enabled;
}
public void setIs_notification_enabled(String is_notification_enabled) {
this.is_notification_enabled = is_notification_enabled;
}
public String getSearch_report_count() {
return search_report_count;
}
public void setSearch_report_count(String search_report_count) {
this.search_report_count = search_report_count;
}
public String getRemove_add() {
return remove_add;
}
public void setRemove_add(String remove_add) {
this.remove_add = remove_add;
}
}}
My MainActivity.java
public class MainActivity extends AppCompatActivity {
List emList=new ArrayList();
List dataList=new ArrayList();
List userDets=new ArrayList();
ImageView proImg;
TextView userName;
TextView userID;
TextView userEmail;
TextView userStatus;
TextView userPlateNum;
TextView userStateName;
TextView userStateID;
TextView userSearchReportCount;
String img;
String name;
String idUser;
String emailID;
String status;
String plateNum;
String stateName;
String stateID;
String searchReportCount;
String email;
Login login;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
emList.add(email);
proImg=(ImageView)findViewById(R.id.userProfilePic);
userName=findViewById(R.id.userName);
email=getIntent().getStringExtra("email");
login=ApiUtils.getLoginClass();
getUserData();
}
private void getUserData(){
Call<Obj.DataBean> call=login.getUserDetails();
call.enqueue(new Callback<Obj.DataBean>() {
#Override
public void onResponse(Call<Obj.DataBean> call, Response<Obj.DataBean> response) {
if(response.isSuccessful()) {
Obj.DataBean obj=response.body();
name=obj.getUser_name();
userName.setText(name);
}
}
#Override
public void onFailure(Call<Obj.DataBean> call, Throwable t) {
Toast.makeText(getApplicationContext(),t.getMessage(),Toast.LENGTH_LONG).show();
}
});
}}
My interface
interface Login {
#GET("user_login_v1")
Call<Obj.DataBean> getUserDetails();}
My layout
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity"
android:background="#e9edf6"
android:scrollbars="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<com.mikhaellopez.circularimageview.CircularImageView
android:id="#+id/userProfilePic"
android:layout_gravity="center"
android:layout_marginTop="30dp"
android:layout_width="150dp"
android:layout_height="150dp"
/>
<TextView
android:id="#+id/userName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#color/fnavyblue"
android:textSize="20sp"
android:text="DummyNameText"
android:layout_marginTop="50dp"
/>
<TextView
android:id="#+id/userID"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#color/fnavyblue"
android:textSize="20sp"
android:text="DummyUserIDText"
android:layout_marginTop="20dp"
/>
<TextView
android:id="#+id/emailID"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#color/fnavyblue"
android:textSize="20sp"
android:text="DummyEmailText"
android:layout_marginTop="20dp"
/>
<TextView
android:id="#+id/userStatus"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#color/fnavyblue"
android:textSize="20sp"
android:text="DummyStatusText"
android:layout_marginTop="20dp"
/>
<TextView
android:id="#+id/userPlateNum"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#color/fnavyblue"
android:textSize="20sp"
android:text="DummyPlateNumText"
android:layout_marginTop="20dp"
/>
<TextView
android:id="#+id/userStateName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#color/fnavyblue"
android:textSize="20sp"
android:text="DummyStateNameText"
android:layout_marginTop="20dp"
/>
<TextView
android:id="#+id/userStateID"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#color/fnavyblue"
android:textSize="20sp"
android:text="DummyStateIDText"
android:layout_marginTop="20dp"
/>
<TextView
android:id="#+id/userSearchReportCount"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#color/fnavyblue"
android:textSize="20sp"
android:text="DummySearchReportCountText"
android:layout_marginTop="20dp"
/>
</LinearLayout>
</ScrollView>
I want to display the details(like name,id,plate number etc) in different textviews. But it returns a blank string,ie null.
Here's my API in JSON format
Can someone help me?
Try this interface method.
#GET("user_login_v1")
Call<Obj> getUserDetails(#Query("email") String email,
#Query("password") String password);
and Call method in your MainActivity like this.
Call<Obj> call=login.getUserDetails(email,password);//email and password which user enter when he login in your device.
Feel free to ask more questions.
I am trying to display my data from firebase real time database on a listview in the main menu screen once the users log in. The app is running but its not displaying the data.
This is the data in my database
Now for the codes.
MainMenu.java This function is called on the OnCreate().
public void makeItem ()
{
lv = findViewById(R.id.listView);
db = FirebaseDatabase.getInstance().getReference();
helper = new FirebaseHelper(db);
adapter= new AdapterItem(this,helper.retrive());
lv.setAdapter(adapter);
}
CustomListAdapter.java
public class CustomListAdapter{
private String ItemName;
private String Quantity;
private String SerialNo;
private String SupplierName;
private String SupplierEmail;
private String SupplierPhone;
public CustomListAdapter(){
}
public CustomListAdapter (String ItemName,String Quantity,String SerialNo,String SupplierName,String SupplierEmail,String SupplierPhone)
{
this.ItemName = ItemName;
this.Quantity = Quantity;
this.SerialNo = SerialNo;
this.SupplierName = SupplierName;
this.SupplierEmail = SupplierEmail;
this.SupplierPhone = SupplierPhone;
}
public void setItemName (String ItemName)
{
this.ItemName = ItemName;
}
public String getItemName ()
{
return ItemName;
}
public void setQuantity (String Quantity)
{
this.Quantity = Quantity;
}
public String getQuantity ()
{
return Quantity;
}
public void setSerialNo (String SerialNo)
{
this.SerialNo = SerialNo;
}
public String getSerialNo ()
{
return SerialNo;
}
public void setSupplierName (String SupplierName)
{
this.SupplierName = SupplierName;
}
public String getSupplierName()
{
return SupplierName;
}
public void setSupplierEmail (String SupplierEmail)
{
this.SupplierEmail = SupplierEmail;
}
public String getSupplierEmail() {
return SupplierEmail;
}
public void setSupplierPhone (String SupplierPhone)
{
this.SupplierPhone = SupplierPhone;
}
public String getSupplierPhone() {
return SupplierPhone;
}
}
AdapterItem.java
public class AdapterItem extends BaseAdapter {
Context c;
ArrayList<CustomListAdapter> customListAdapters;
public AdapterItem(Context c, ArrayList<CustomListAdapter> customListAdapters) {
this.c = c;
this.customListAdapters = customListAdapters;
}
#Override
public int getCount() {
return customListAdapters.size();
}
#Override
public Object getItem(int position) {
return customListAdapters.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
if(convertView==null)
{
convertView=LayoutInflater.from(c).inflate(R.layout.content_main_menu_list,parent,false);
}
TextView ItemName = convertView.findViewById(R.id.name);
TextView SerialNo = convertView.findViewById(R.id.serialNo);
TextView SupplierName = convertView.findViewById(R.id.supplierName);
TextView amount = convertView.findViewById(R.id.amount);
final CustomListAdapter CLA = (CustomListAdapter) this.getItem(position);
ItemName.setText(CLA.getItemName());
SerialNo.setText(CLA.getSerialNo());
SupplierName.setText(CLA.getSupplierName());
amount.setText(CLA.getQuantity());
convertView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(c,CLA.getItemName(),Toast.LENGTH_SHORT).show();
}
});
return convertView;
}
}
content_main_menu.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:showIn="#layout/app_bar_main_menu">
<ListView
android:id="#+id/listView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_marginStart="0dp"
android:layout_marginTop="0dp" />
content_main_menu_list.xml is a custom layout that i created for every data set to be displayed.
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
xmlns:app="http://schemas.android.com/apk/res-auto">
<android.support.constraint.ConstraintLayout
android:layout_width="0dp"
android:layout_height="100dp"
android:layout_marginStart="8dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<TextView
android:id="#+id/amount"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:text="TextView"
android:textSize="20sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" />
<TextView
android:id="#+id/serialNo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="10dp"
android:layout_marginTop="8dp"
android:layout_marginBottom="8dp"
android:text="TextView"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/supplierName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:text="TextView"
app:layout_constraintTop_toBottomOf="#+id/serialNo" />
<TextView
android:id="#+id/name"
android:layout_width="wrap_content"
android:layout_height="23dp"
android:layout_marginBottom="8dp"
android:text="Medium Text"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#0171B0"
app:layout_constraintBottom_toTopOf="#+id/serialNo" />
</android.support.constraint.ConstraintLayout>
</android.support.constraint.ConstraintLayout>
The problem in your code lies in the fact that you have in your CustomListAdapter class a field named ItemName but you are using a getter named getItemName(), which is not correct since Firebase is looking in the database for a field named itemName and not ItemName. See the lowercase i letter vs. capital letter I?
There are two ways in which you can solve this problem. The first one would be to change your model class by renaming the fields according to the Java Naming Conventions. So you model class should look like this:
public class CustomListAdapter {
private String itemName, quantity, serialNo, supplierName, supplierEmail, supplierPhone;
public CustomListAdapter() {}
public CustomListAdapter(String itemName, String quantity, String serialNo, String supplierName, String supplierEmail, String supplierPhone) {
this.itemName = itemName;
this.quantity = quantity;
this.serialNo = serialNo;
this.supplierName = supplierName;
this.supplierEmail = supplierEmail;
this.supplierPhone = supplierPhone;
}
public String getItemName() { return itemName; }
public String getQuantity() { return quantity; }
public String getSerialNo() { return serialNo; }
public String getSupplierName() { return supplierName; }
public String getSupplierEmail() { return supplierEmail; }
public String getSupplierPhone() { return supplierPhone; }
}
See in this example, there are private fields and public getters. There is also a simpler solution, to set the value directly on public fields like this:
public class CustomListAdapter {
public String itemName, quantity, serialNo, supplierName, supplierEmail, supplierPhone;
}
Now just remove the current data and add it again using the correct names. This solution will work only if you are in testing phase.
There is also the second approach, which is to use annotations. So if you prefer to use private fields and public getters, you should use the PropertyName annotation only in front of the getter. So your CustomListAdapter class should look like this:
public class CustomListAdapter {
private String ItemName;
private String Quantity;
private String SerialNo;
private String SupplierName;
private String SupplierEmail;
private String SupplierPhone;
public CustomListAdapter() {}
public CustomListAdapter(String itemName, String quantity, String serialNo, String supplierName, String supplierEmail, String supplierPhone) {
ItemName = itemName;
Quantity = quantity;
SerialNo = serialNo;
SupplierName = supplierName;
SupplierEmail = supplierEmail;
SupplierPhone = supplierPhone;
}
#PropertyName("ItemName")
public String getItemName() { return ItemName; }
#PropertyName("Quantity")
public String getQuantity() { return Quantity; }
#PropertyName("SerialNo")
public String getSerialNo() { return SerialNo; }
#PropertyName("SupplierName")
public String getSupplierName() { return SupplierName; }
#PropertyName("SupplierEmail")
public String getSupplierEmail() { return SupplierEmail; }
#PropertyName("SupplierPhone")
public String getSupplierPhone() { return SupplierPhone; }
}
I'm having trouble setting the text of multiple textviews in a custom list layout with a custom adapter. Here is my list item layout:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="?android:attr/listPreferredItemHeight"
android:padding="6dip" >
<ImageView
android:id="#+id/icon"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_alignParentBottom="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="5dip"
android:layout_marginRight="5dp"
android:contentDescription="TODO"
android:src="#drawable/blue_circle" />
<TextView
android:id="#+id/short_content"
android:layout_width="wrap_content"
android:layout_height="26dip"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_toRightOf="#id/icon"
android:ellipsize="marquee"
android:text="content"
android:singleLine="true"
android:textSize="12sp" />
<TextView
android:id="#+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#id/short_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_alignWithParentIfMissing="true"
android:layout_toRightOf="#id/icon"
android:gravity="center_vertical"
android:text="Title"
android:textSize="16sp" />
<TextView
android:id="#+id/date"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_above="#id/short_content"
android:layout_alignParentTop="true"
android:layout_toRightOf="#id/icon"
android:gravity="right"
android:text="date"
android:textSize="13sp" />
Here is my adapter:
public class MessageAdapter extends ArrayAdapter<TextContent> {
public MessageAdapter(Context context, int textViewResourceId){
super(context, textViewResourceId);
}
public MessageAdapter(Context context, int textViewResourceId, List<TextContent> items){
super(context, textViewResourceId, items);
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = convertView;
if (view == null) {
LayoutInflater inflater;
inflater = LayoutInflater.from(getContext());
view = inflater.inflate(R.layout.messages_layout, null);
}
TextContent p = getItem(position);
if(p != null) {
TextView textViewShortContent = (TextView) view.findViewById(R.id.short_content);
TextView textViewTitle = (TextView) view.findViewById(R.id.title);
TextView textViewDate = (TextView) view.findViewById(R.id.date);
if (textViewShortContent != null) {
textViewShortContent.setText("Short Content");
}
if (textViewTitle != null) {
textViewTitle.setText("TITLE");
}
if (textViewDate != null) {
textViewDate.setText("DATE");
}
}
return view;
}
}
here is my textContent class:
public class TextContent implements Serializable{
private String GUID, created, modified, deleted, name, message, title, shortContent, fullContent, author, language, person;
public TextContent(){
}
public TextContent(String GUID, String created, String modified, String deleted, String name, String message, String title,
String shortContent, String fullContent, String author, String language, String person) {
this.GUID = GUID;
this.created = created;
this.modified = modified;
this.deleted = deleted;
this.name = name;
this.message = message;
this.title = title;
this.shortContent = shortContent;
this.fullContent = fullContent;
this.author = author;
this.language = language;
this.person = person;
}
public String getGUID() {
return GUID;
}
public String getCreated() {
return created;
}
public String getModified() {
return modified;
}
public String getDeleted() {
return deleted;
}
public String getName() {
return name;
}
public String getMessage() {
return message;
}
public String getTitle() {
return title;
}
public String getShortContent() {
return shortContent;
}
public String getFullContent() {
return fullContent;
}
public String getAuthor() {
return author;
}
public String getLanguage() {
return language;
}
public String getPerson() {
return person;
}
public void setGUID(String GUID) {
this.GUID = GUID;
}
public void setCreated(String created) {
this.created = created;
}
public void setModified(String modified) {
this.modified = modified;
}
public void setDeleted(String deleted) {
this.deleted = deleted;
}
public void setName(String name) {
this.name = name;
}
public void setMessage(String message) {
this.message = message;
}
public void setTitle(String title) {
this.title = title;
}
public void setShortContent(String shortContent) {
this.shortContent = shortContent;
}
public void setFullContent(String fullContent) {
this.fullContent = fullContent;
}
public void setAuthor(String author) {
this.author = author;
}
public void setLanguage(String language) {
this.language = language;
}
public void setPerson(String person) {
this.person = person;
}
}
and here is where I instantiate my adapter
listView = (ListView) getView().findViewById(R.id.list_view_messages);
MessageAdapter adapter = new MessageAdapter(context, R.layout.messages_layout, textContentList);
listView.setAdapter(adapter);
The only thing that gets displayed is the getShortContent but not getTitle or getCreated for some reason. I am 100% certain that text has been set for all fields of the textContent.
I figured it out. The textViews in my layout was overlapping so the content from the other textviews got hidden behind.