Android Studio 1.1.0 Facebook SDK登录 [英] Android Studio 1.1.0 Facebook SDK Login
问题描述
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
但是当我添加
< 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:
com.facebook.login.widget.LoginButton(打开类,显示异常)
提示:使用视图.isInEditMode()在您的自定义视图中跳过代码或显示示例数据显示在IDE
异常详细信息java.lang.NoClassDefFoundError:无法初始化类com.facebook.login.widget.LoginButton
在java.lang.reflect.Constructor.newInstance(Constructor.java: 422)
在android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:806)
在android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:64)
在android.view.LayoutInflater .rInflate(LayoutInflater.java:782)
在android.view.LayoutInflater.inflate(LayoutInflater.java:504)
在android.view.LayoutInflater.inflate(LayoutInflater.java:385)将堆栈复制到剪贴板
您没有发布您的活动代码。但我认为你的代码就像:
setContentView(R.layout.my_login_layout);
FacebookSdk.sdkInitialize(getApplicationContext());
mCallbackManager = CallbackManager.Factory.create();
问题是代码的顺序。忽略布局中的渲染问题,将代码的顺序更改为:
FacebookSdk.sdkInitialize(getApplicationContext() );
mCallbackManager = CallbackManager.Factory.create(); //这行不重要
setContentView(R.layout.my_login_layout);
在OnCreate(...)中使用此代码{...}
避免布局渲染问题
如果要解决渲染问题(布局预览) a href =https://stackoverflow.com/questions/29268738/android-studio-1-1-0-facebook-sdk-login/29354870#29354870> @ Nathan30 answer (见下文)。
- 下载Facebook SDK
- 将其作为模块导入到您的项目
- 然后在您的布局中添加
< com.facebook.widget.LoginButton ... />
。
I try to test the login with facebook SDK.
So I add with compile 'com.facebook.android:facebook-android-sdk:4.0.0'
.
Then add FacebookSdk.sdkInitialize(getApplicationContext());
to MainActivity.java
But when I add
<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" />`
I have this following error :
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
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();
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);
Use this code in OnCreate(...) { ... }
Avoid layout render problems
if you want to solve the render problems (layout preview) check the @Nathan30 answer (see below).
- Download Facebook SDK
- Import it as a Module to your project
- Then add
<com.facebook.widget.LoginButton .../>
to your layout.
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