小编spu*_*cne的帖子

下面是我的build.gradle文件中的代码.

apply plugin: 'com.android.application'

android {
    compileSdkVersion 22
    buildToolsVersion "23.0.0 rc3"

    defaultConfig {
        applicationId "com.example.test"
        minSdkVersion 14
        targetSdkVersion 22
        versionCode 1
        versionName "1.0"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

repositories {
   mavenCentral()
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:22.2.1'
    compile 'com.facebook.android:facebook-android-sdk:4.4.0'
}

当我使用gradle文件同步项目时,它给了我错误.

  Error:(28, 13) Failed to resolve: com.facebook.android:facebook-android-sdk:4.4.0

谁能告诉我为什么我会收到这个错误？

这里也提出了类似的问题,但没有人回答.( 无法解决:com.facebook.android:facebook-android-sdk:4.0.0)

当我在节点服务器上打印请求的内容时,我无法在任何地方看到用户数据.

这是我的节点服务器:

var http = require('http');
http.createServer( function (request, response) {  
    console.log(request);
}).listen(8080);
console.log('Server running at http://127.0.0.1:8080/');

这是Angular2代码:

import { Component, OnInit } from '@angular/core';
import { HttpClient } from "@angular/common/http";
import { Http, Response, Headers , RequestOptions } from "@angular/http";
import 'rxjs/add/operator/retry'; // to be able to retry when error occurs
import { Observable } from "rxjs/Rx";

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})

export class AppComponent implements OnInit{
  title = 'Angular Test';
  user = { id : …