你的模型
public class TaskDes {
private boolean done;
private String taskDescription;
private String taskTitle;
public TaskDes() {
}
public boolean isDone() {
return done;
}
public void setDone(boolean done) {
this.done = done;
}
public String getTaskDescription() {
return taskDescription;
}
public void setTaskDescription(String taskDescription) {
this.taskDescription = taskDescription;
}
public String getTaskTitle() {
return taskTitle;
}
public void setTaskTitle(String taskTitle) {
this.taskTitle = taskTitle;
}
}
您需要创建一个GenericTypeIndicatorDataSnapshot.getValue()
对象作为参数传递。
活动中
private static final String TAG=MainActivity.class.getSimpleName();
private FirebaseDatabase database;
private DatabaseReference myRef=null;
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
database=FirebaseDatabase.getInstance();
myRef=database.getReference("ADD_YOUR_REFERECE");
myRef.addValueEventListener(new ValueEventListener(){
@Override
public void onDataChange(DataSnapshot dataSnapshot){
/* This method is called once with the initial value and again whenever data at this location is updated.*/
long value=dataSnapshot.getChildrenCount();
Log.d(TAG,"no of children: "+value);
GenericTypeIndicator<List<TaskDes>> genericTypeIndicator =new GenericTypeIndicator<List<TaskDes>>(){};
List<TaskDes> taskDesList=dataSnapshot.getValue(genericTypeIndicator);
for(int i=0;i<taskDesList.size();i++){
Toast.makeText(MainActivity.this,"TaskTitle = "+taskDesList.get(i).getTaskTitle(),Toast.LENGTH_LONG).show();
}
}
@Override
public void onCancelled(DatabaseError error){
// Failed to read value
Log.w(TAG,"Failed to read value.",error.toException());
}
});
}