public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private static final int RC_SIGN_IN = 9001;
private static final String TAG = "SignInActivity";
private GoogleSignInClient mGoogleSignInClient;
private TextView mStatusTextView;
GoogleSignInAccount userAccount;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
}
//초기화 함수
protected void init(){
// Views
mStatusTextView = findViewById(R.id.status);
// Button listeners
findViewById(R.id.sign_in_button).setOnClickListener(this);
findViewById(R.id.sign_out_button).setOnClickListener(this);
findViewById(R.id.disconnect_button).setOnClickListener(this);
findViewById(R.id.profile).setOnClickListener(this);
// Configure sign-in to request the user's ID, email address, and basic
// profile. ID and basic profile are included in DEFAULT_SIGN_IN.
GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
.requestEmail()
.build();
// gso로 지정된 옵션을 사용하여 GoogleSignInClient를 빌드합니다.
mGoogleSignInClient = GoogleSignIn. getClient ( this , gso );
}
@Override
public void onStart() {
super.onStart();
// [START on_start_sign_in]
//account가 null이 아닐 경우, 이 사용자는 이미 구글 로그인 상태이다.
GoogleSignInAccount account = GoogleSignIn.getLastSignedInAccount(this);
// [END on_start_sign_in]
updateUI(account);
//이미 구글 로그인이 된(이 앱에 로그인 된) 상태
if(account != null){
}
else{//로그인이 되지 않았으니, 로그인을 받아야 한다.
}
}
// [START onActivityResult]
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// Result returned from launching the Intent from GoogleSignInClient.getSignInIntent(...);
if (requestCode == RC_SIGN_IN) {//이 시점에서 이미 로그인이 되어 있다.
// The Task returned from this call is always completed, no need to attach
// a listener.
Task<GoogleSignInAccount> task = GoogleSignIn.getSignedInAccountFromIntent(data);
handleSignInResult(task);
//signOut(); //로그인 끊기.
}
}
// [END onActivityResult]
// [START handleSignInResult]
private void handleSignInResult(Task<GoogleSignInAccount> completedTask) {
try {
GoogleSignInAccount account = completedTask.getResult(ApiException.class);
userAccount = account;//로그인된 계정 정보
// Signed in successfully, show authenticated UI.
updateUI(account);
} catch (ApiException e) {
// The ApiException status code indicates the detailed failure reason.
// Please refer to the GoogleSignInStatusCodes class reference for more information.
Log.w(TAG, "signInResult:failed code=" + e.getStatusCode());
updateUI(null);
}
}
// [END handleSignInResult]
// [START signIn]
private void signIn() {
Intent signInIntent = mGoogleSignInClient.getSignInIntent();
startActivityForResult(signInIntent, RC_SIGN_IN);//구글 로그인 창(구글아이디 고르기 를 연다)
}
// [END signIn]
// [START signOut]
private void signOut() {
mGoogleSignInClient.signOut()
.addOnCompleteListener(this, new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
// [START_EXCLUDE]
updateUI(null);
// [END_EXCLUDE]
}
});
}
// [END signOut]
// [START revokeAccess]
private void revokeAccess() {
mGoogleSignInClient.revokeAccess()
.addOnCompleteListener(this, new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
// [START_EXCLUDE]
updateUI(null);
// [END_EXCLUDE]
}
});
}
// [END revokeAccess]
//로그인 된 사용자의 개인정보 확인.
//메일, 이름, 나이, 성별 확인 필요.
private void profile(){
String email = userAccount.getEmail();
String id = userAccount.getId();
String familyname = userAccount.getFamilyName();
String givenname = userAccount.getGivenName();
Toast.makeText(getApplicationContext(),"email : " + email + "\nid = " + id + "\nfamilyname = " + familyname + "\ngivenname = " + givenname,Toast.LENGTH_SHORT).show();
}
private void updateUI(@Nullable GoogleSignInAccount account) {
if (account != null) {
mStatusTextView.setText(getString(R.string.signed_in_fmt, account.getDisplayName()));
findViewById(R.id.sign_in_button).setVisibility(View.GONE);
findViewById(R.id.sign_out_and_disconnect).setVisibility(View.VISIBLE);
} else {
mStatusTextView.setText(R.string.signed_out);
findViewById(R.id.sign_in_button).setVisibility(View.VISIBLE);
findViewById(R.id.sign_out_and_disconnect).setVisibility(View.GONE);
}
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.sign_in_button:
signIn();
break;
case R.id.sign_out_button:
signOut();
break;
case R.id.disconnect_button:
revokeAccess();
break;
case R.id.profile:
profile();
break;
}
}
}
