如果使用Firebase簡單用戶名和密碼身份驗證，如何返回用戶列表不確定我是否做錯了什么，但是使用這個apihttps：/www.Firebase.com/docs/security/簡易-登錄-電子郵件-password.html我可以根據返回消息成功地創建一個用戶，但是在Forge控制臺的任何地方都看不到該用戶。您如何知道哪些用戶已注冊？我應該使用返回的用戶ID并在Firebase中創建自己的用戶對象，還是沒有必要重復。我確實需要添加一些額外的用戶屬性，所以可能無論如何我都需要這樣做。
3 回答
拉莫斯之舞
TA貢獻1820條經驗 獲得超10個贊
idemailauth
三國紛爭
TA貢獻1804條經驗 獲得超7個贊
SignInActivity.java
public class SignInActivity extends BaseActivity implements View.OnClickListener,View.OnKeyListener{
private DatabaseReference mDatabase;
public static FirebaseAuth mAuth;
private static final String TAG = "MainActivity";
EditText usernameField;
EditText passwordField;
TextView changeSignUpModeTextView;
Button signUpButton;
ImageView logo;
RelativeLayout relativeLayout;
Boolean signUpModeActive;
static ArrayList<String> userList = new ArrayList<>();
@Override
public void onStart() {
super.onStart();
// Check auth on Activity start
if (mAuth.getCurrentUser() != null) {
onAuthSuccess(mAuth.getCurrentUser());
}
}
@Override
public boolean onKey(View view, int i, KeyEvent keyEvent) {
if(i == keyEvent.KEYCODE_ENTER && keyEvent.getAction() == keyEvent.ACTION_DOWN){
signUpOrLogIn(view);
}
return false;
}
@Override
public void onClick(View view) {
if(view.getId() == R.id.changeSignUpMode){
if (signUpModeActive == true){
signUpModeActive = false;
changeSignUpModeTextView.setText("Sign Up");
signUpButton.setText("Log In");
}else{
signUpModeActive = true;
changeSignUpModeTextView.setText("Log In");
signUpButton.setText("Sign Up");
}
}else if(view.getId() == R.id.logo || view.getId() == R.id.relativeLayout){
InputMethodManager inm = (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE);
inm.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(),0);
}
}
public void signUpOrLogIn(View view) {
showProgressDialog();
String email = usernameField.getText().toString().trim();
String password = passwordField.getText().toString().trim();
if (signUpModeActive == true) {
mAuth.createUserWithEmailAndPassword(email,password)
.addOnCompleteListener(MainActivity.this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
hideProgressDialog();
Toast.makeText(MainActivity.this, "createUserWithEmail:onComplete:" + task.isSuccessful(), Toast.LENGTH_SHORT).show();
// If sign in fails, display a message to the user. If sign in succeeds
// the auth state listener will be notified and logic to handle the
// signed in user can be handled in the listener.
if (!task.isSuccessful()) {
Toast.makeText(MainActivity.this, "Authentication failed." + task.getException().toString().substring(task.getException().toString().indexOf(" ")),
Toast.LENGTH_SHORT).show();
Log.i("Error", task.getException().toString());
} else {
onAuthSuccess(task.getResult().getUser());
showUserList();
}
}
});
} else {
mAuth.signInWithEmailAndPassword(email,password)
.addOnCompleteListener(MainActivity.this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
hideProgressDialog();
// If sign in fails, display a message to the user. If sign in succeeds
// the auth state listener will be notified and logic to handle the
// signed in user can be handled in the listener.
if (!task.isSuccessful()) {
// there was an error
Toast.makeText(MainActivity.this, task.getException().toString(),
Toast.LENGTH_LONG).show();
} else
{
onAuthSuccess(task.getResult().getUser());
showUserList();
}
}
});
}
}
public void showUserList(){
startActivity(new Intent(getApplicationContext(), UserList.class));
finish();
}
private void onAuthSuccess(FirebaseUser user) {
String username = usernameFromEmail(user.getEmail());
// Write new user
writeNewUser(user.getUid(), username, user.getEmail());
// Go to MainActivity
}
private String usernameFromEmail(String email) {
if (email.contains("@")) {
return email.split("@")[0];
} else {
return email;
}
}
private void writeNewUser(String userId, String name, String email) {
User user = new User(name, email);
mDatabase.child("users").child(userId).setValue(user);
ArrayList<String> userNames = new ArrayList<>();
userNames.add(name);
mDatabase.child("usernamelist").setValue(userNames);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mAuth = FirebaseAuth.getInstance();
mDatabase = FirebaseDatabase.getInstance().getReference();
if(mAuth.getCurrentUser()!=null){
showUserList();
}
usernameField = (EditText) findViewById(R.id.username);
passwordField = (EditText) findViewById(R.id.password);
changeSignUpModeTextView = (TextView) findViewById(R.id.changeSignUpMode);
signUpButton = (Button) findViewById(R.id.signupbutton);
logo = (ImageView)findViewById(R.id.logo);
relativeLayout= (RelativeLayout)findViewById(R.id.relativeLayout);
signUpModeActive = true;
changeSignUpModeTextView.setOnClickListener(this);
usernameField.setOnKeyListener(this);
passwordField.setOnKeyListener(this);
logo.setOnClickListener(this);
relativeLayout.setOnClickListener(this);
}
}UserList.java
public class UserList extends AppCompatActivity {
private static final String TAG = "UserList" ;
private DatabaseReference userlistReference;
private ValueEventListener mUserListListener;
ArrayList<String> usernamelist = new ArrayList<>();
ArrayAdapter arrayAdapter;;
ListView userListView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_user_list);
userlistReference = FirebaseDatabase.getInstance().getReference().child("usernamelist");
onStart();
userListView = (ListView) findViewById(R.id.userlistview);
}
@Override
protected void onStart() {
super.onStart();
final ValueEventListener userListener = new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
usernamelist = new ArrayList<>((ArrayList) dataSnapshot.getValue());
usernamelist.remove(usernameOfCurrentUser());
Log.i(TAG, "onDataChange: "+usernamelist.toString());
arrayAdapter = new ArrayAdapter(UserList.this,android.R.layout.simple_list_item_1,usernamelist);
userListView.setAdapter(arrayAdapter);
}
@Override
public void onCancelled(DatabaseError databaseError) {
Log.w(TAG, "onCancelled: ",databaseError.toException());
Toast.makeText(UserList.this, "Failed to load User list.",
Toast.LENGTH_SHORT).show();
}
};
userlistReference.addValueEventListener(userListener);
mUserListListener = userListener;
}
public String usernameOfCurrentUser()
{
String email = MainActivity.mAuth.getCurrentUser().getEmail();
if (email.contains("@")) {
return email.split("@")[0];
} else {
return email;
}
}
@Override
public void onStop() {
super.onStop();
// Remove post value event listener
if (mUserListListener != null) {
userlistReference.removeEventListener(mUserListListener);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch(item.getItemId()) {
case R.id.action_logout:
FirebaseAuth.getInstance().signOut();
startActivity(new Intent(this, MainActivity.class));
finish();
return true;
default:
return super.onOptionsItemSelected(item);
}
}}
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