作者:cgy梦回秦都 | 来源:互联网 | 2023-02-10 10:27
我正在使用Firebase身份验证在Android中创建一个简单的身份验证应用 直到现在我成功签署了用户,但问题是用户仍然登录,我找不到签署他的方法.
这是我的MainActivity.java代码
public class MainActivity extends AppCompatActivity {
private FirebaseAuth mAuth;
private FirebaseAuth.AuthStateListener mAuthListener;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//tracking the sign in and singn out operations
mAuth = FirebaseAuth.getInstance();
mAuthListener = new FirebaseAuth.AuthStateListener(){
@Override
public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
FirebaseUser user = firebaseAuth.getCurrentUser();
if (user!=null){
System.out.println("User logged in");
}
else{
System.out.println("User not logged in");
}
}
};
}
public void onStart(){
super.onStart();
mAuth.addAuthStateListener(mAuthListener);
}
public void onStop(){
super.onStop();
if (mAuthListener != null) {
mAuth.removeAuthStateListener(mAuthListener);
}
}
public void buttonClicked(View view){
EditText editemail = (EditText) findViewById(R.id.email);
EditText editpass = (EditText) findViewById(R.id.password);
String email = editemail.getText().toString();
String password = editpass.getText().toString();
mAuth.signInWithEmailAndPassword(email, password)
.addOnCompleteListener(this, new OnCompleteListener() {
@Override
public void onComplete(@NonNull Task task) {
// Log.d(TAG, "signInWithEmail:onComplete:" + task.isSuccessful());
Toast.makeText(MainActivity.this, "Authentication Success.",
Toast.LENGTH_SHORT).show();
startActivity(new Intent(MainActivity.this,Success.class));
// 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()) {
// Log.w(TAG, "signInWithEmail", task.getException());
Toast.makeText(MainActivity.this, "Authentication failed.",
Toast.LENGTH_SHORT).show();
}
// ...
}
});
}
}
saurabh dixi..
26
使用此代码 FirebaseAuth.getInstance().signOut();
1> saurabh dixi..:
使用此代码 FirebaseAuth.getInstance().signOut();
2> Md. Monsur H..:
你可以简单地称之为
FirebaseAuth.getInstance().signOut();
如果您想在退出后执行某些操作,请使用此操作.
public void onClick(View v) {
if (v.getId() == R.id.sign_out) {
AuthUI.getInstance()
.signOut(this)
.addOnCompleteListener(new OnCompleteListener() {
public void onComplete(@NonNull Task task) {
// user is now signed out
startActivity(new Intent(MyActivity.this, SignInActivity.class));
finish();
}
});
}
}
3> 小智..:
试试这个
FirebaseAuth fAuth = FirebaseAuth.getInstance();
fAuth.signOut();
除非你需要`fAuth`用于其他东西,`FirebaseAuth.getInstance().signOut();`工作正常
4> Yash Krishan..:
这可以通过使用AuthStateListener来解决
//Declaration and defination
private FirebaseAuth firebaseAuth;
FirebaseAuth.AuthStateListener authStateListener = new FirebaseAuth.AuthStateListener() {
@Override
public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
if (firebaseAuth.getCurrentUser() == null){
//Do anything here which needs to be done after signout is complete
signOutComplete();
}
else {
}
}
};
//Init and attach
firebaseAuth = FirebaseAuth.getInstance();
firebaseAuth.addAuthStateListener(authStateListener);
//Call signOut()
firebaseAuth.signOut();
片段:https : //codepad.co/snippet/aPeehdoD
5> captainchhal..:
如果您使用的是firebaseAuthUI,那么推荐的方法是
public void onClick(View v) {
if (v.getId() == R.id.sign_out) {
AuthUI.getInstance()
.signOut(this)
.addOnCompleteListener(new OnCompleteListener() {
public void onComplete(@NonNull Task task) {
// user is now signed out
startActivity(new Intent(MyActivity.this, SignInActivity.class));
finish();
}
});
}
}
根据firebaseAuthUI github指南.
6> Jd Prajapati..:
Firebase auth是提供注销方法。
FirebaseAuth.getInstance().signOut();