如何在安卓手机中使用HintRequest获取无国家代码的手机号

implementation 'com.google.android.gms:play-services-auth:19.2.0'

import com.google.android.gms.auth.api.phone.HintRequest;

// ...

HintRequest hintRequest = new HintRequest.Builder()
    .setPhoneNumberIdentifierSupported(true)
    .build();

import com.google.android.gms.auth.api.Auth;
import com.google.android.gms.auth.api.credentials.Credential;
import com.google.android.gms.auth.api.credentials.CredentialsOptions;
import com.google.android.gms.auth.api.credentials.HintRequest;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.common.api.Status;

// ...

GoogleApiClient googleApiClient = new GoogleApiClient.Builder(context)
    .addApi(Auth.CREDENTIALS_API, new CredentialsOptions.Builder().forceEnableSaveDialog().build())
    .build();

googleApiClient.connect();

HintRequest hintRequest = new HintRequest.Builder()
    .setPhoneNumberIdentifierSupported(true)
    .build();

PendingIntent intent = Auth.CredentialsApi.getHintPickerIntent(googleApiClient, hintRequest);
startIntentSenderForResult(intent.getIntentSender(), REQUEST_CODE_HINT, null, 0, 0, 0);

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

    if (requestCode == REQUEST_CODE_HINT) {
        if (resultCode == RESULT_OK) {
            Credential credential = data.getParcelableExtra(Credential.EXTRA_KEY);
            String phoneNumber = credential.getId(); // 获取到用户选择的手机号码
            // 处理手机号码
        } else if (resultCode == RESULT_CANCELED) {
            // 用户取消了选择手机号码
        }
    }
}