使用与Firebase的接口

Z时代
2024-01-10
分类：问答

目前，我正在为几个不同的类实现一个名为RowType的接口，让我们假设类A，B和C.如何遍历Firebase以获取每个不同的对象？使用与Firebase的接口

.addListenerForSingleValueEvent(new ValueEventListener() { 
       @Override 
       public void onDataChange(DataSnapshot dataSnapshot) { 
        for (DataSnapshot snapshot : dataSnapshot.getChildren()) { 
         RowType rowType = snapshot.getValue(RowType.class); 
         Log.d("awdjk", "qwjel"); 
        }

我会假设，因为插在火力地堡的所有对象要么是A级，B，或C，我可以使用ROWTYPE来获取快照值。但是，我收到一条错误消息，指出“在类RowType上找不到要序列化的属性”。

UPDATE

接口

public interface RowType { 
int EXERCISE_ROW = 0; 
int REST_ROW = 1; 
int SUPERSET_ROW = 2; 
int PYRAMIDSET_ROW = 3; 
int BUTTON_ROW = 4; 
}

运动类

public class ExerciseModel implements RowType { 
public String exercise, sets, reps, view, minutes, seconds, time, weight, childCount; 
private EditText weightEditText, setsEditText, repsEditText; 
private AutoCompleteTextView exerciseEditText; 
private ImageView dragHandle; 
private ExerciseRowTextWatcher exerciseRowTextWatcher; 
public ExerciseRowTextWatcher getExerciseRowTextWatcher(){ 
    return exerciseRowTextWatcher; 
} 
public void setExerciseRowTextWatcher(ExerciseRowTextWatcher exerciseRowTextWatcher){ 
    this.exerciseRowTextWatcher = exerciseRowTextWatcher; 
} 
public ImageView getDragHandle(){ 
    return dragHandle; 
} 
public void setDragHandle(ImageView dragHandle){ 
    this.dragHandle = dragHandle; 
} 
public AutoCompleteTextView getExerciseEditText(){ 
    return exerciseEditText; 
} 
public void setExerciseEditText(AutoCompleteTextView exerciseEditText){ 
    this.exerciseEditText = exerciseEditText; 
} 
public EditText getWeightEditText(){ 
    return weightEditText; 
} 
public void setWeightEditText(EditText weightEditText){ 
    this.weightEditText = weightEditText; 
} 
public EditText getSetsEditText(){ 
    return setsEditText; 
} 
public void setSetsEditText(EditText setsEditText){ 
    this.setsEditText = setsEditText; 
} 
public EditText getRepsEditText(){ 
    return repsEditText; 
} 
public void setRepsEditText(EditText repsEditText){ 
    this.repsEditText = repsEditText; 
} 
public String getChildCount(){ 
    return childCount; 
} 
public void setChildCount(String childCount){ 
    this.childCount = childCount; 
} 
public String getExercise(){ 
    return exercise; 
} 
public String getWeight(){ 
    return weight; 
} 
public String getSets(){ 
    return sets; 
} 
public String getReps(){ 
    return reps; 
} 
public String getView(){ 
    return view; 
} 
public String getMinutes(){ 
    return minutes; 
} 
public String getSeconds(){ 
    return seconds; 
} 
public String getTime(){ return time;} 
public void setExercise(String exercise){ 
    this.exercise = exercise; 
} 
public void setTime(String time){ this.time = time; } 
public void setWeight(String weight){ 
    this.weight = weight; 
} 
public void setMinutes(String minutes){ 
    this.minutes = minutes; 
} 
public void setSeconds(String seconds){ 
    this.seconds = seconds; 
} 
public void setSets(String sets){ 
    this.sets = sets; 
} 
public void setView(String view){ 
    this.view = view; 
} 
public void setReps(String reps){ 
    this.reps = reps; 
} 
}