有没有人知道Smart Lock？
它是如何工作的？

我想在Android应用程序中开发一个为密码实现Smart Lock的应用程序.

我跟随https://developers.google.com/identity/smartlock-passwords/android/.

我已经初始化了GoogleApiClient

 mCredentialsApiClient = new GoogleApiClient.Builder(this)
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this)
            .addApi(Auth.CREDENTIALS_API)
            .build();

并生成Credential的实例

 final Credential credential = new Credential.Builder(email)
            .setPassword(password)
            .build();

我使用Credentials API保存凭据

Auth.CredentialsApi.save(mCredentialsClient, credential).setResultCallback(
 new ResultCallback() {
  @Override
  public void onResult(Status status) {
      if (status.isSuccess()) {
          // Credentials were saved
      } else {
          if (status.hasResolution()) {
              // Try to resolve the save request. This will prompt the user if
              // the credential is new.
              try {
                  status.startResolutionForResult(this, RC_SAVE);
              } catch (IntentSender.SendIntentException e) {
                  // Could not resolve the request
              }
          }
      }
  }
});

我的清单获得了许可

   <uses-permission android:name="android.permission.USE_CREDENTIALS" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />

并在应用程序标记中添加了元数据

    <meta-data
        android:name="com.google.android.gms.version"
        android:value="@integer/google_play_services_version" />

在Android应用程序中完成所有操作后,我在Google Developer Console上生成了项目,并完成了this link here中提到的所有操作.

但是当我运行项目时,我收到的错误是：

Could not resolve error.

有没有人在Android应用程序上使用Google的Smart Lock for Password？

解决方法:

对我来说,Smart Lock for Passwords on Android样本项目运作良好.您可能想尝试从那里开始,看看是否有帮助.在示例代码中,save凭证实现为：

在onCreate：

    mCredentialsApiClient = new GoogleApiClient.Builder(this)
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this)
            .addApi(Auth.CREDENTIALS_API)
            .build();

…
在saveCredetial方法中：

    final Credential credential = new Credential.Builder(email)
            .setPassword(password)
            .build();

    Auth.CredentialsApi.save(mCredentialsApiClient, credential).setResultCallback(
            new ResultCallback<Status>() {
                @Override
                public void onResult(Status status) {
                    if (status.isSuccess()) {
                        Log.d(TAG, "SAVE: OK");
                        showToast("Credential Saved");
                        hideProgress();
                    } else {
                        resolveResult(status, RC_SAVE);
                    }
                }
            });

…
关于主要活动的resolveResult方法：

private void resolveResult(Status status, int requestCode) {
    Log.d(TAG, "Resolving: " + status);
    if (status.hasResolution()) {
        Log.d(TAG, "STATUS: RESOLVING");
        try {
            status.startResolutionForResult(MainActivity.this, requestCode);
        } catch (IntentSender.SendIntentException e) {
            Log.e(TAG, "STATUS: Failed to send resolution.", e);
            hideProgress();
        }
    } else {
        Log.e(TAG, "STATUS: FAIL");
        showToast("Could Not Resolve Error");
        hideProgress();
    }
}