相关疑难解决方法(0)

我正在我的项目中使用android AAC库和Android数据绑定库.我有AuthActivity和AuthViewModel扩展了android的ViewModel类.在某些情况下,我需要让Activity为ViewModel调用一些方法.例如,当用户点击Google Auth或Facebook Auth按钮时,它在Activity类中初始化(因为初始化GoogleApiClient我需要Activity上下文,我无法传递给ViewModel,视图模型无法存储Activity字段).在Activity类中实现了Google Api和Facebook API的所有逻辑:

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

//facebook login button
loginButton.setReadPermissions(Arrays.asList("email", "public_profile"));
loginButton.registerCallback(callbackManager,

此外,我需要调用登录意图,这也需要活动上下文:

Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(googleApiClient);
startActivityForResult(signInIntent, GOOGLE_AUTH);

我不能请求facebook登录和google登录,或者从视图模型类请求startActivity intent,所以我创建了类接口AuthActivityListener:

public interface AuthActivityListener {
    void requestSignedIn();

    void requestGoogleAuth();

    void requestFacebookAuth();

    void requestShowDialogFragment(int type);
}

在活动类中实现监听器:

AuthActivityRequester authRequestListener = new AuthActivityRequester() {
        @Override
        public void requestSignedIn() {
            Intent intent = new Intent(AuthActivity.this, ScanActivity.class);
            startActivity(intent);
            AuthActivity.this.finish();
        }

        @Override
        public void requestGoogleAuth() {
            Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(googleApiClient);
            startActivityForResult(signInIntent, GOOGLE_AUTH);
        } …