要实现Android应用默认显示登录界面,并且应用内嵌有Google自动登录功能,可以按照以下步骤进行操作:
其中,.LoginActivity
为登录界面的Activity。
implementation 'com.google.android.gms:play-services-auth:17.0.0'
import com.google.android.gms.auth.api.Auth;
import com.google.android.gms.auth.api.signin.GoogleSignIn;
import com.google.android.gms.auth.api.signin.GoogleSignInAccount;
import com.google.android.gms.auth.api.signin.GoogleSignInOptions;
import com.google.android.gms.common.SignInButton;
import com.google.android.gms.common.api.GoogleApiClient;
public class LoginActivity extends AppCompatActivity {
private static final int RC_SIGN_IN = 9001;
private GoogleApiClient mGoogleApiClient;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
// 配置Google登录选项
GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
.requestEmail()
.build();
// 初始化GoogleApiClient
mGoogleApiClient = new GoogleApiClient.Builder(this)
.enableAutoManage(this, new GoogleApiClient.OnConnectionFailedListener() {
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
// 处理连接失败的情况
}
})
.addApi(Auth.GOOGLE_SIGN_IN_API, gso)
.build();
// 设置Google登录按钮点击事件
SignInButton googleSignInButton = findViewById(R.id.google_sign_in_button);
googleSignInButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// 启动Google登录流程
Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(mGoogleApiClient);
startActivityForResult(signInIntent, RC_SIGN_IN);
}
});
}
// 处理Google登录结果
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == RC_SIGN_IN) {
GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data);
handleSignInResult(result);
}
}
private void handleSignInResult(GoogleSignInResult result) {
if (result.isSuccess()) {
// Google登录成功,可以获取用户信息
GoogleSignInAccount account = result.getSignInAccount();
String email = account.getEmail();
// TODO: 处理登录成功的逻辑
} else {
// Google登录失败
// TODO: 处理登录失败的逻辑
}
}
}
以上就是实现Android应用默认显示登录界面,并应用内嵌Google自动登录功能的解决方法。在登录界面的Activity中,根据实际情况处理登录成功或失败的逻辑。