在Android中,可以通过使用Google Sign-In API来实现Google登录功能。要监控用户取消登录的状态,可以使用GoogleApiClient.Builder中的setAccountName方法来设置账号名称,并在onConnectionFailed回调方法中检查错误码是否为SIGN_IN_CANCELLED。以下是一个示例代码:
import com.google.android.gms.auth.api.Auth;
import com.google.android.gms.auth.api.signin.GoogleSignInOptions;
import com.google.android.gms.auth.api.signin.GoogleSignInResult;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
public class MainActivity extends AppCompatActivity implements GoogleApiClient.OnConnectionFailedListener {
private GoogleApiClient mGoogleApiClient;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 配置Google登录选项
GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
.requestEmail()
.build();
// 创建GoogleApiClient实例
mGoogleApiClient = new GoogleApiClient.Builder(this)
.enableAutoManage(this, this)
.addApi(Auth.GOOGLE_SIGN_IN_API, gso)
.build();
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
// 监听连接失败回调
if (connectionResult.getErrorCode() == ConnectionResult.SIGN_IN_CANCELLED) {
// 用户取消登录
Toast.makeText(this, "用户取消登录", Toast.LENGTH_SHORT).show();
}
}
private void signIn() {
Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(mGoogleApiClient);
startActivityForResult(signInIntent, RC_SIGN_IN);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// 处理Google登录结果
if (requestCode == RC_SIGN_IN) {
GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data);
if (result.isSuccess()) {
// 登录成功
GoogleSignInAccount account = result.getSignInAccount();
// 处理用户信息
} else {
// 登录失败
Toast.makeText(this, "登录失败", Toast.LENGTH_SHORT).show();
}
}
}
}
在上述代码中,onConnectionFailed方法会在连接失败时被调用,我们可以在该方法中检查错误码是否为SIGN_IN_CANCELLED来判断用户是否取消了登录。如果是,则可以进行相应的处理。
此外,还需要在AndroidManifest.xml文件中添加以下权限:
<uses-permission android:name="android.permission.INTERNET" />
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