Firebaseのデータが正しい形式で取得されていません

Question

私はここで本当に愚かなものがないかもしれません。しかし、私は正しい形式で火災基地データを取得していません。

Person.java

public class Person { 

    private String name; 
    private String email; 
    private String hobby; 

    public Person(){ 

    } 


    public Person(String name , String email , String hobby){ 
     this.name= name; 
     this.email = email; 
     this.hobby = hobby; 

    } 

    public void setName(String name) { 
     this.name = name; 
    } 

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

    public void setHobby(String hobby) { 
     this.hobby = hobby; 
    } 

    public String getName() { 
     return name; 
    } 

    public String getEmail() { 
     return email; 
    } 

    public String getHobby() { 
     return hobby; 
    } 
} 

MainActivity.java

public class MainActivity extends AppCompatActivity { 

    private ViewPager viewPager; 
// private FirebaseAuth mAuth; 
    List<Person> person; 
    private Context context; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     person = new ArrayList<>(); 
//  mAuth = FirebaseAuth.getInstance(); 
     context = this; 



     viewPager = (ViewPager) findViewById(R.id.pagerView); 
     viewPager.setAdapter(new MyPagerAdapter(getSupportFragmentManager(), person, context)); 


    } 


    class MyPagerAdapter extends FragmentPagerAdapter { 
     String[] tabsArray; 
     private List<Person> personInAdapter = new ArrayList<>(); 
     private Context context; 

//  int icons[] = {R.drawable.white_home, R.drawable.white_heart, 
//    R.drawable.white_star, R.drawable.white_heart, R.drawable.white_star}; 

     public MyPagerAdapter(FragmentManager fm, List<Person> person, Context context) { 
      super(fm); 
      personInAdapter = person; 
      this.context = context; 
      tabsArray = getResources().getStringArray(R.array.TABS); 
     } 


//  @Override 
//  public CharSequence getPageTitle(int position) { 
//   return tabsArray[position]; 
//  } 

     @Override 
     public Fragment getItem(int position) { 

      return MyFragment.getInstance(position); 
     } 

     @Override 
     public int getCount() { 
      return personInAdapter.size(); 
     } 
    } 
} 

MyFragment.java

public class MyFragment extends Fragment { 
    private TextView upperText; 
    private TextView lowerText; 
    List<Person> personInAdapter = new ArrayList<>(); 
    private Context context; 
    private DatabaseReference databaseReference; 
    public static MyFragment getInstance(int position) { 
     MyFragment myFragment = new MyFragment(); 
     Bundle args = new Bundle(); 
     args.putInt("position", position); 
     myFragment.setArguments(args); 

     return myFragment; 
    } 


    @Nullable 
    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
     View view = inflater.inflate(R.layout.fragment_my, container, false); 
     upperText = (TextView) view.findViewById(R.id.myFragmentUpperText); 
     lowerText = (TextView) view.findViewById(R.id.myFragmentLowerText); 
     databaseReference = FirebaseUtil.getBaseRef().child("Person"); 
     int i = getArguments().getInt("position"); 
     ValueEventListener postListener = new ValueEventListener() { 
      @Override 
      public void onDataChange(DataSnapshot dataSnapshot) { 
       // Get Post object and use the values to update the UI 
       Person person = dataSnapshot.getValue(Person.class); 

       Log.e("Data In Person ", person.toString()); 
       upperText.setText(person.getName()); 
       lowerText.setText(person.getEmail()); 
       // [END_EXCLUDE] 
      } 

      @Override 
      public void onCancelled(DatabaseError databaseError) { 
       // Getting Post failed, log a message 
       // [START_EXCLUDE] 

      } 
     }; 
     databaseReference.addValueEventListener(postListener); 
//  Bundle bundle = getArguments(); 
//  if (bundle != null) { 
//   textView.setText("The value is" +i); 
//  } 

     return view; 
    } 


    @Override 
    public void onActivityCreated(@Nullable Bundle savedInstanceState) { 
     super.onActivityCreated(savedInstanceState); 

    } 
} 

LogCatから

：私のfirebaseコンソールから

W/ClassMapper: No setter/field for -Ka45AN7nk3rAqTGfcp3 found on class testfirebase.com.testprojectforall.Person 
W/ClassMapper: No setter/field for -Ka45AN20cVBNFqbCwUj found on class testfirebase.com.testprojectforall.Person 
W/ClassMapper: No setter/field for -Ka45ANAi__pHJhzwjIa found on class testfirebase.com.testprojectforall.Person 
W/ClassMapper: No setter/field for -Ka45AN9pBd21aiHbS6i found on class testfirebase.com.testprojectforall.Person 
W/ClassMapper: No setter/field for -Ka45AN8Q1Y5GHOWRnpP found on class testfirebase.com.testprojectforall.Person 
E/Data In Person: testfirebase.com.testprojectforall.Person@b56a0f3 
W/ClassMapper: No setter/field for -Ka45AN7nk3rAqTGfcp3 found on class testfirebase.com.testprojectforall.Person 
W/ClassMapper: No setter/field for -Ka45AN20cVBNFqbCwUj found on class testfirebase.com.testprojectforall.Person 
W/ClassMapper: No setter/field for -Ka45ANAi__pHJhzwjIa found on class testfirebase.com.testprojectforall.Person 
W/ClassMapper: No setter/field for -Ka45AN9pBd21aiHbS6i found on class testfirebase.com.testprojectforall.Person 
W/ClassMapper: No setter/field for -Ka45AN8Q1Y5GHOWRnpP found on class testfirebase.com.testprojectforall.Person 
E/Data In Person: testfirebase.com.testprojectforall.Person@7dec1b0 
W/ClassMapper: No setter/field for -Ka45AN7nk3rAqTGfcp3 found on class testfirebase.com.testprojectforall.Person 
W/ClassMapper: No setter/field for -Ka45AN20cVBNFqbCwUj found on class testfirebase.com.testprojectforall.Person 
W/ClassMapper: No setter/field for -Ka45ANAi__pHJhzwjIa found on class testfirebase.com.testprojectforall.Person 
W/ClassMapper: No setter/field for -Ka45AN9pBd21aiHbS6i found on class testfirebase.com.testprojectforall.Person 
W/ClassMapper: No setter/field for -Ka45AN8Q1Y5GHOWRnpP found on class testfirebase.com.testprojectforall.Person 
E/Data In Person: testfirebase.com.testprojectforall.Person@6fc4829 
W/ClassMapper: No setter/field for -Ka45AN7nk3rAqTGfcp3 found on class testfirebase.com.testprojectforall.Person 
W/ClassMapper: No setter/field for -Ka45AN20cVBNFqbCwUj found on class testfirebase.com.testprojectforall.Person 
W/ClassMapper: No setter/field for -Ka45ANAi__pHJhzwjIa found on class testfirebase.com.testprojectforall.Person 
W/ClassMapper: No setter/field for -Ka45AN9pBd21aiHbS6i found on class testfirebase.com.testprojectforall.Person 
W/ClassMapper: No setter/field for -Ka45AN8Q1Y5GHOWRnpP found on class testfirebase.com.testprojectforall.Person 
E/Data In Person: testfirebase.com.testprojectforall.Person@3e83de5 

サンプル：

私は、テキストが、設定することはできませんを取得しています。火災基地の要求を処理する際に私は何をしていますか？

Answer 1

あなたは、データベース内PersonノードにValueEventListenerを装着している：

ValueEventListener postListener = new ValueEventListener() { 
     @Override 
     public void onDataChange(DataSnapshot dataSnapshot) { 
      // Get Post object and use the values to update the UI 
      Person person = dataSnapshot.getValue(Person.class); 

      Log.e("Data In Person ", person.toString()); 
      upperText.setText(person.getName()); 
      lowerText.setText(person.getEmail()); 
      // [END_EXCLUDE] 
     } 

     @Override 
     public void onCancelled(DatabaseError databaseError) { 
      // Getting Post failed, log a message 
      // [START_EXCLUDE] 

     } 
    }; 
    databaseReference.addValueEventListener(postListener); 

これはあなたのonDataChangeがPersonノードの下にあるすべてのデータで呼び出されることを意味します。あなたのケースでは、それは複数の人になるでしょう。

スナップショットに子ノードをループすることによって、これを処理する必要が onDataChangeあなたに

：

public void onDataChange(DataSnapshot dataSnapshot) { 
    for (DataSnapshot personSnapshot: dataSnapshot.getChildren()) { 
     Person person = personSnapshot.getValue(Person.class); 
     Log.i("Data In Person ", person.toString()); 
    } 
}