import com.firebase.client.Firebase; //导入方法依赖的package包/类

/**

* Attempts to sign in or register the account specified by the login form.

* If there are form errors (invalid email, missing fields, etc.), the

* errors are presented and no actual login attempt is made.

*/

private void attemptLogin() {

// Reset errors.

mEmailView.setError(null);

mPasswordView.setError(null);

// Store values at the time of the login attempt.

String email = mEmailView.getText().toString();

String password = mPasswordView.getText().toString();

boolean cancel = false;

View focusView = null;

// Check for a valid password, if the user entered one.

if (!TextUtils.isEmpty(password) && !isPasswordValid(password)) {

mPasswordView.setError(getString(R.string.error_invalid_password));

focusView = mPasswordView;

cancel = true;

}

// Check for a valid email address.

if (TextUtils.isEmpty(email)) {

mEmailView.setError(getString(R.string.error_field_required));

focusView = mEmailView;

cancel = true;

} else if (!isEmailValid(email)) {

mEmailView.setError(getString(R.string.error_invalid_email));

focusView = mEmailView;

cancel = true;

}

if (cancel) {

// There was an error; don't attempt login and focus the first

// form field with an error.

focusView.requestFocus();

} else {

showProgress(true);

Firebase ref = new Firebase(Constant_ApplicationConstant.FirebaseURL);

Firebase.AuthResultHandler authResultHandler = new Firebase.AuthResultHandler() {

@Override

public void onAuthenticated(AuthData authData) {

Log.e("AuthData", authData.toString());

SharedPreferences.Editor ed = sp.edit();

ed.remove("UID");

ed.putString("UID", authData.getUid());

ed.commit();

showProgress(false);

goToUserList(authData.getUid());

}

@Override

public void onAuthenticationError(FirebaseError firebaseError) {

Log.e("AuthErr", firebaseError.toString());

Toast.makeText(getBaseContext(),firebaseError.toString(),Toast.LENGTH_SHORT).show();

showProgress(false);

}

};

ref.authWithPassword(email,password,authResultHandler);

}

}