在我的应用程序中,我有两个活动。第一项活动将数据保存到Firebase,第二项活动将检索数据。我可以存储的数据没有问题,但是当试图检索数据不会出现在TextView
从firebase检索到textview的数据
这是我的代码,当我运行的应用程序的TextView
显示为空检索数据
public class DataOne extends NavigationApp {
public TextView nameOne, ageOne, addressOne, shcoolOne;
private DatabaseReference mDatabase;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Firebase.setAndroidContext(this);
mDatabase = FirebaseDatabase.getInstance().getReference().child("/DetailOne/");
TextView NameStudent = (TextView) findViewById(R.id.Name);
TextView agestudent = (TextView) findViewById(R.id.age);
TextView addressstudent = (TextView) findViewById(R.id.address);
TextView schoolstudent = (TextView) findViewById(R.id.school);
nameOne = (TextView) findViewById(R.id.WriteName);
ageOne = (TextView) findViewById(R.id.WriteAge);
addressOne = (TextView) findViewById(R.id.WriteAddress);
shcoolOne = (TextView) findViewById(R.id.WriteSchool);
Button map = (Button) findViewById(R.id.mapOne);
map.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent MapOne= new Intent(DataOne.this, DataOneMap.class);
startActivity(MapOne);
}
});
mDatabase.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
for (DataSnapshot postSnapshot : dataSnapshot.getChildren()) {
Detail detail = dataSnapshot.getValue(Detail.class);
String name = detail.getName();
String age = detail.getAge();
String address = detail.getAddress();
String school = detail.getSchool();
nameOne.setText(name);
ageOne.setText(age);
addressOne.setText(address);
shcoolOne.setText(school);
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
// [START_EXCLUDE]
System.out.println("The read failed: " + databaseError.getMessage());
}
});
}
}
。
火力地堡结构:
您可以从Firebase根共享您的数据库结构吗? –
从'child(“/ DetailOne /”)中删除'/''这里不是sql或php,它会像: 'child(“DetailOne”)' – Ibrahim