我正在尝试检索存储在实时数据库中的值,但是当我打开活动时,找不到这些值,我只能看到我输入的提示。
这是我的活动。java
private DatabaseReference settingUsersRef;
private FirebaseAuth mAuth;
Button SaveInformation;
private EditText FullName, UserName, DOB, Bio, Interest, Gender;
// private ImageView ProfileImage;
private String currentUserID;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_testingactivity);
mAuth = FirebaseAuth.getInstance();
currentUserID = mAuth.getCurrentUser().getUid();
settingUsersRef = FirebaseDatabase.getInstance().getReference().child("users").child(currentUserID);
SaveInformation = findViewById(R.id.saveUserBtn);
FullName = findViewById(R.id.fullNameText);
UserName = findViewById(R.id.userNameText);
DOB = findViewById(R.id.dobText);
Bio = findViewById(R.id.bioText);
Interest = findViewById(R.id.interestText);
Gender = findViewById(R.id.genderText);
settingUsersRef.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
if (dataSnapshot.exists()) {
dataSnapshot.getChildren();
String myUsername = dataSnapshot.child("username").getValue().toString();
String myFullname = dataSnapshot.child("fullname").getValue().toString();
String myDOB = dataSnapshot.child("dob").getValue().toString();
String myBio = dataSnapshot.child("bio").getValue().toString();
String myInterest = dataSnapshot.child("interests").getValue().toString();
String myGender = dataSnapshot.child("gender").getValue().toString();
// String myEmail = dataSnapshot.child("email").getValue().toString();
UserName.setText(myUsername);
FullName.setText(myFullname);
DOB.setText(myDOB);
Bio.setText(myBio);
Interest.setText(myInterest);
Gender.setText(myGender);
}
// showData(dataSnapshot);
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
}
下面是我的xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".testingactivity">
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_alignParentEnd="true"
android:layout_alignParentBottom="true"
android:layout_marginStart="0dp"
android:layout_marginTop="0dp"
android:layout_marginEnd="0dp"
android:layout_marginBottom="25dp"
android:fillViewport="true">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/usersImage"
android:layout_width="218dp"
android:layout_height="178dp"
android:layout_alignParentTop="true"
android:layout_alignParentEnd="true"
android:layout_marginTop="58dp"
android:layout_marginEnd="100dp"
android:scaleType="fitXY"
app:srcCompat="@drawable/com_facebook_profile_picture_blank_portrait" />
<EditText
android:id="@+id/userNameText"
android:layout_width="218dp"
android:layout_height="wrap_content"
android:layout_below="@id/usersImage"
android:layout_alignParentEnd="true"
android:layout_marginTop="14dp"
android:layout_marginEnd="100dp"
android:background="@drawable/text_background"
android:backgroundTint="@color/colorblack"
android:ems="10"
android:hint="Username"
android:inputType="textPersonName"
android:textColor="@color/colorAccent"
android:textColorHint="@color/colorAccent"
android:textSize="20sp" />
<EditText
android:id="@+id/fullNameText"
android:layout_width="218dp"
android:layout_height="wrap_content"
android:layout_below="@id/userNameText"
android:layout_alignParentEnd="true"
android:layout_marginTop="14dp"
android:layout_marginEnd="100dp"
android:background="@drawable/text_background"
android:backgroundTint="@color/colorblack"
android:ems="10"
android:hint="Full Name"
android:inputType="textPersonName"
android:textColor="@color/colorAccent"
android:textColorHint="@color/colorAccent" />
<EditText
android:id="@+id/dobText"
android:layout_width="218dp"
android:layout_height="wrap_content"
android:layout_below="@id/fullNameText"
android:layout_alignParentEnd="true"
android:layout_marginTop="14dp"
android:layout_marginEnd="100dp"
android:background="@drawable/text_background"
android:backgroundTint="@color/colorblack"
android:ems="10"
android:hint="DOB mm/dd/yy"
android:inputType="date"
android:textColorHint="@color/colorAccent" />
<EditText
android:id="@+id/bioText"
android:layout_width="218dp"
android:layout_height="wrap_content"
android:layout_below="@id/dobText"
android:layout_alignParentEnd="true"
android:layout_marginTop="14dp"
android:layout_marginEnd="100dp"
android:background="@drawable/text_background"
android:backgroundTint="@color/colorblack"
android:ems="10"
android:hint="Bio"
android:text=""
android:textColor="@color/colorAccent"
android:textColorHint="@color/colorAccent" />
<EditText
android:id="@+id/interestText"
android:layout_width="218dp"
android:layout_height="wrap_content"
android:layout_below="@id/bioText"
android:layout_alignParentEnd="true"
android:layout_marginTop="14dp"
android:layout_marginEnd="100dp"
android:background="@drawable/text_background"
android:backgroundTint="@color/colorblack"
android:ems="10"
android:hint="Interests"
android:textColorHint="@color/colorAccent" />
<EditText
android:id="@+id/genderText"
android:layout_width="218dp"
android:layout_height="wrap_content"
android:layout_below="@id/interestText"
android:layout_alignParentEnd="true"
android:layout_marginTop="14dp"
android:layout_marginEnd="100dp"
android:background="@drawable/text_background"
android:backgroundTint="@color/colorblack"
android:hint="Gender"
android:textColor="@color/colorAccent"
android:textColorHint="@color/colorAccent" />
<Button
android:id="@+id/saveUserBtn"
android:layout_width="150dp"
android:layout_height="wrap_content"
android:layout_below="@id/genderText"
android:layout_alignParentEnd="true"
android:layout_marginTop="14dp"
android:layout_marginEnd="135dp"
android:background="@android:color/transparent"
android:text="Update Profile"
android:textColor="@color/colorWhite"
android:textSize="20dp" />
</RelativeLayout>
</ScrollView>
</RelativeLayout>
我从另一个Java活动向我的数据中初始化了虚拟变量,并且能够查看数据库中的值。 我将附上数据库的照片,其中显示uid和与该uid一起使用的子项。