Question

我在最新的Android应用程序中使用Retrofit实现了Facebook登录。在SplashActivity和LoginActivity中，我想发出我的POST请求：

FacebookLoginInfo facebookLoginInfo = new FacebookLoginInfo(token);
Call<User> call = ApiManager.getService().authenticateFacebookUser(facebookLoginInfo);
call.enqueue(userCallback);

FacebookLoginInfo是一个带有Facebook访问令牌的简单POJO。 ApiManager是我服务的单例类。

我的问题是在SplashActivity和LoginActivity中userCallback是重复的。是否有最佳实践只定义一次此回调？

用户回调的定义：

private Callback<User> mUserCallback = new Callback<User>() {
    @Override
    public void onResponse(Call<User> call, Response<User> response) {
        dismissProgressDialog();

        int statusCode = response.code();
        if (statusCode == 200) {
            User user = response.body();
            Log.e(LOG_TAG, "user: " + user.toString());

            Intent intent = new Intent(LoginActivity.this, MainActivity.class);
            intent.putExtra(Global.EXTRA_USER, user);
            startActivity(intent);
        } else if (statusCode == 400) {
            Toast.makeText(LoginActivity.this, getString(R.string.error_token_required), Toast.LENGTH_SHORT).show();
        } else if (statusCode == 403) {
            Toast.makeText(LoginActivity.this, getString(R.string.error_invalid_token), Toast.LENGTH_SHORT).show();
        }
    }

    @Override
    public void onFailure(Call<User> call, Throwable t) {
        dismissProgressDialog();
        t.printStackTrace();
        Toast.makeText(LoginActivity.this, getString(R.string.error_call_failed), Toast.LENGTH_SHORT).show();
    }
};

Answer 1

您可以创建一个名为UserCallback的类来实现Callback，并在您想要的地方使用它。

在你的情况下：

public class UserCallback implements Callback<EventResponseList> {
@Override
    public void onResponse(Call<User> call, Response<User> response) {
        dismissProgressDialog();

        int statusCode = response.code();
        if (statusCode == 200) {
            User user = response.body();
            Log.e(LOG_TAG, "user: " + user.toString());

            Intent intent = new Intent(LoginActivity.this, MainActivity.class);
            intent.putExtra(Global.EXTRA_USER, user);
            startActivity(intent);
        } else if (statusCode == 400) {
            Toast.makeText(LoginActivity.this, getString(R.string.error_token_required), Toast.LENGTH_SHORT).show();
        } else if (statusCode == 403) {
            Toast.makeText(LoginActivity.this, getString(R.string.error_invalid_token), Toast.LENGTH_SHORT).show();
        }
    }

    @Override
    public void onFailure(Call<User> call, Throwable t) {
        dismissProgressDialog();
        t.printStackTrace();
        Toast.makeText(LoginActivity.this, getString(R.string.error_call_failed), Toast.LENGTH_SHORT).show();
    }
}

当你想要使用它时：

FacebookLoginInfo facebookLoginInfo = new FacebookLoginInfo(token);
Call<User> call = ApiManager.getService().authenticateFacebookUser(facebookLoginInfo);
call.enqueue(new UserCallback());

避免重复的改装回调

1 个答案: