Android Studio 1.1.0 Facebook SDK 登录 [英] Android Studio 1.1.0 Facebook SDK Login

问题描述

我尝试使用 facebook SDK 测试登录.

I try to test the login with facebook SDK.

所以我添加了 compile 'com.facebook.android:facebook-android-sdk:4.0.0'.

然后添加 FacebookSdk.sdkInitialize(getApplicationContext());到 MainActivity.java

Then add FacebookSdk.sdkInitialize(getApplicationContext()); to MainActivity.java

但是当我添加时

 <com.facebook.login.widget.LoginButton
    android:id="@+id/login_button"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center_horizontal"
    android:layout_marginTop="30dp"
    android:layout_marginBottom="30dp" />`

我有以下错误:

Rendering Problems The following classes could not be instantiated:
com.facebook.login.widget.LoginButton (Open Class, Show Exception)
Tip: Use View.isInEditMode() in your custom views to skip code or show sample data when shown in the IDE  
Exception Details java.lang.NoClassDefFoundError: Could not initialize class com.facebook.login.widget.LoginButton
at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:806)
at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:64)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:782)
at android.view.LayoutInflater.inflate(LayoutInflater.java:504)
at android.view.LayoutInflater.inflate(LayoutInflater.java:385) Copy stack to clipboard

推荐答案

你没有发布你的活动代码.但我认为你的代码是这样的:

You didn't posted your Activity code. But i think your code is like:

setContentView(R.layout.my_login_layout);
FacebookSdk.sdkInitialize(getApplicationContext());
mCallbackManager = CallbackManager.Factory.create();

问题在于代码的顺序.忽略布局中的渲染问题"，将代码顺序改为:

The problem is the order of the code. Ignore the "Render problems" in the layout, change the order of the code to this:

FacebookSdk.sdkInitialize(getApplicationContext());
mCallbackManager = CallbackManager.Factory.create(); // this line doesn't matter 
setContentView(R.layout.my_login_layout);

在 OnCreate(...) { ... } 中使用此代码

Use this code in OnCreate(...) { ... }

避免布局渲染问题

如果您想解决渲染问题(布局预览)，请查看 @Nathan30 回答(见下文).

if you want to solve the render problems (layout preview) check the @Nathan30 answer (see below).

1. 下载 Facebook SDK
2. 将其作为模块导入您的项目
3. 然后将 <com.facebook.widget.LoginButton .../> 添加到您的布局中.

1. Download Facebook SDK
2. Import it as a Module to your project
3. Then add <com.facebook.widget.LoginButton .../> to your layout.

这篇关于Android Studio 1.1.0 Facebook SDK 登录的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！