Извлеченные данные Firebase не отображаются в Listview - PullRequest
Новая
       12

Извлеченные данные Firebase не отображаются в Listview

0 голосов
/ 22 марта 2020

Я создал список, в который я хочу поместить все извлеченные данные в соответствии с результатом предыдущих значений активности. Например, у меня есть Spinner и Edittext, а затем кнопка поиска.

Результат будет соответствовать значению счетчика и редактировать текстовое значение. Но это не придет. Пожалуйста помоги. Ниже моего класса Test с его файлом макета (здесь представлен спиннер и текст редактирования) и действием SearchResults и Useradapter (класс модели)

Test. java

public class Test extends AppCompatActivity {
Spinner sp;
EditText e1;
Button logout, searchuser;
FirebaseAuth firebaseAuth;
FirebaseUser firebaseUser;

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.fragment_home);

    logout = (Button)findViewById(R.id.logout);
    searchuser = (Button)findViewById(R.id.searchbutt1);
    sp = (Spinner)findViewById(R.id.selectblood) ;
    e1 = (EditText)findViewById(R.id.searchpin);

    firebaseAuth = FirebaseAuth.getInstance();
    firebaseUser = firebaseAuth.getCurrentUser();

    final String[] bloodgroups = new String[]{"A+","A-", "B+", "B-","O+", "O-", "AB+", "AB-"};
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, bloodgroups);
    sp.setAdapter(adapter);

    searchuser.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            String bloods = sp.getSelectedItem().toString();
            String pin1 = e1.getText().toString();

            Intent intent = new Intent(Test.this, Searchresults.class);
            intent.putExtra("bloods", bloods);
            intent.putExtra("pin1", pin1);
            startActivity(intent);
        }
    });

    logout.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {


            AlertDialog.Builder alert = new AlertDialog.Builder(Test.this);
            alert.setMessage("Are you Sure?")
                    .setCancelable(false)
                    .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            FirebaseAuth.getInstance().signOut();
                            Intent i = new Intent(getApplicationContext(), SignupPage.class);
                            i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                            i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
                            startActivity(i);
                        }
                    })
                    .setNegativeButton("No", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            dialog.cancel();
                        }
                    });
            AlertDialog dialogg = alert.create();
            dialogg.show();


        }
    });
}
}

Файл макета (Fragmenthome. xml) 

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/button">

<ImageView
    android:id="@+id/imageView3"
    android:layout_width="match_parent"
    android:layout_height="400dp"
    android:src="@drawable/bloodimage"
    app:layout_constraintBottom_toTopOf="@+id/cardView2"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.32999998" />

<androidx.cardview.widget.CardView
    android:id="@+id/cardView2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginStart="20dp"
    android:layout_marginEnd="20dp"
    app:cardCornerRadius="15dp"
    app:cardElevation="4dp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.7">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:padding="20dp">

        <Spinner
            android:id="@+id/selectblood"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />

        <com.google.android.material.textfield.TextInputLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <com.google.android.material.textfield.TextInputEditText
                android:id="@+id/searchpin"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:hint="Enter Pincode"
                android:inputType="number"/>
        </com.google.android.material.textfield.TextInputLayout>


    </LinearLayout>


</androidx.cardview.widget.CardView>

<Button
    android:id="@+id/searchbutt1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginStart="40dp"
    android:layout_marginEnd="40dp"
    android:background="@drawable/buttonpressed"
    android:text="Search"
    android:textColor="#ffffff"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/cardView2"
    app:layout_constraintVertical_bias="0.32" />

<Button
    android:id="@+id/logout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginStart="40dp"
    android:layout_marginEnd="40dp"
    android:background="@drawable/buttonpressed"
    android:text="Logout"
    android:textColor="#ffffff"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/searchbutt1" />

Результаты поиска Действия 

public class Searchresults extends AppCompatActivity {
String pinfin;
String bloodfin;
ArrayList<String> donorList;
ListView listView;
ArrayAdapter<String> arrayAdapter;
public static ArrayList<UserAdapter> donorInfo;
DatabaseReference myRef;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_searchresults);

    Bundle extras = getIntent().getExtras();
    bloodfin = extras.getString("bloods");
    pinfin = extras.getString("pin1");

    donorList = new ArrayList<>();
    donorInfo = new ArrayList<>();
    listView = (ListView) findViewById(R.id.list_donor);
    arrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, 
    donorList);
    listView.setAdapter(arrayAdapter);

    myRef = FirebaseDatabase.getInstance().getReference("Users");
    myRef.child(bloodfin).child(pinfin).addChildEventListener(new ChildEventListener() {
        @Override
        public void onChildAdded(DataSnapshot dataSnapshot, String s) {
            UserAdapter donor = dataSnapshot.getValue(UserAdapter.class);
            donorInfo.add(donor);
            assert donor != null;
            String donorInfo = donor.namefin  + "   \n" + donor.gender + "   \n" + donor.phonefin + "   \n" + donor.addfin + "   \n" + donor.bloodfin ;
            donorList.add(donorInfo);
            arrayAdapter.notifyDataSetChanged();
        }

        @Override
        public void onChildChanged(DataSnapshot dataSnapshot, String s) {

        }

        @Override
        public void onChildRemoved(DataSnapshot dataSnapshot) {

        }

        @Override
        public void onChildMoved(DataSnapshot dataSnapshot, String s) {

        }

        @Override
        public void onCancelled(DatabaseError databaseError) {
            Toast.makeText(Searchresults.this, databaseError.getMessage(), Toast.LENGTH_SHORT).show();


        }
    });
}

}

Класс UserAdapter 

public class UserAdapter {

public String email, namefin, addfin, statefin, phonefin, pinfin, bloodfin, gender;

public UserAdapter(String email, String namefin, String addfin, String statefin, String pinfin, String phonefin, String bloodfin, String gender) {
    this.email = email;
    this.namefin = namefin;
    this.addfin = addfin;
    this.statefin = statefin;
    this.phonefin = phonefin;
    this.pinfin = pinfin;
    this.bloodfin = bloodfin;
    this.gender = gender;
}

public String getEmail() {
    return email;
}

public String getNamefin() {
    return namefin;
}

public String getAddfin() {
    return addfin;
}

public String getStatefin() {
    return statefin;
}

public String getPhonefin() {
    return phonefin;
}

public String getPinfin() {
    return pinfin;
}

public String getBloodfin() {
    return bloodfin;
}

public String getGender() {
    return gender;
}

public void setEmail(String email) {
    this.email = email;
}

public void setNamefin(String namefin) {
    this.namefin = namefin;
}

public void setAddfin(String addfin) {
    this.addfin = addfin;
}

public void setStatefin(String statefin) {
    this.statefin = statefin;
}

public void setPhonefin(String phonefin) {
    this.phonefin = phonefin;
}

public void setPinfin(String pinfin) {
    this.pinfin = pinfin;
}

public void setBloodfin(String bloodfin) {
    this.bloodfin = bloodfin;
}

public void setGender(String gender) {
    this.gender = gender;
}

}

1 Ответ

0 голосов
/ 23 марта 2020 
myRef = FirebaseDatabase.getInstance().getReference("Users");
myRef.child(bloodfin).child(pinfin).addChildEventListener(new ChildEventListener() {
    @Override
    public void onChildAdded(DataSnapshot dataSnapshot, String s) {
        UserAdapter donor = dataSnapshot.getValue(UserAdapter.class);
        donorInfo.add(donor);
        assert donor != null;
        String donorInfo = donor.namefin  + "   \n" + donor.gender + "   \n" + donor.phonefin + "   \n" + donor.addfin + "   \n" + donor.bloodfin ;
        donorList.add(donorInfo);
        arrayAdapter = new ArrayAdapter(donorList, getContext());
            recyclerview.setAdapter(arrayAdapter);
    }
...