1. 确认已正确添加Google SignIn和AWS-Amplify Cognito依赖项到Android项目中。
2. 确保在AWS Console中正确配置了Cognito和Google身份验证。
3. 在Android项目的build.gradle文件中添加以下依赖项：

dependencies { implementation 'com.amazonaws:aws-android-sdk-auth-userpools:2.28.+' implementation 'com.amazonaws:aws-android-sdk-auth-ui:2.28.+' implementation 'com.amazonaws:aws-android-sdk-cognito:2.28.+' implementation 'com.google.android.gms:play-services-auth:19.2.0' }

4. 在MainActivity.java文件中添加以下代码：

public class MainActivity extends AppCompatActivity implements GoogleApiClient.OnConnectionFailedListener, View.OnClickListener {

private GoogleApiClient googleApiClient;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    // Build Google Sign In client
    GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
            .requestIdToken(getString(R.string.default_web_client_id))
            .requestEmail()
            .build();

    googleApiClient = new GoogleApiClient.Builder(this)
            .enableAutoManage(this, this)
            .addApi(Auth.GOOGLE_SIGN_IN_API, gso)
            .build();

    // Set click listeners
    findViewById(R.id.sign_in_button).setOnClickListener(this);
}

@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
    Log.e(TAG, "onConnectionFailed:" + connectionResult);
}

@Override
public void onClick(View v) {
    switch (v.getId()) {
        case R.id.sign_in_button:
            signIn();
            break;
    }
}

private void signIn() {
    Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(googleApiClient);
    startActivityForResult(signInIntent, RC_SIGN_IN);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    if (requestCode == RC_SIGN_IN) {
        GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data);