com.facebook.widget.ProfilePictureView - 错误：解析XML时出错：未绑定的前缀 [英] com.facebook.widget.ProfilePictureView - error: Error parsing XML: unbound prefix

问题描述

是的，我有这个错误在

 < com.facebook.widget.ProfilePictureView 
  

行和这是一个在stackoverflow上被多次提出的问题，每次似乎已经被在顶部添加xmlns：fb =http://schemas.android.com/apk/res-auto。那么没有为我解决，不知道为什么:(所以我该怎么办？

 <？ xml version =1.0encoding =utf-8？> 
< LinearLayout xmlns：android =http://schemas.android.com/apk/res/android
 xmlns： fb =http://schemas.android.com/apk/res-auto
 android：layout_width =wrap_content
 android：layout_height =wrap_content
 android：layout_marginTop = 20dp
 android：gravity =center_horizo​​ntal
 android：orientation =horizo​​ntal> 
 
< com.facebook.widget.ProfilePictureView 
 android：id =@ + id / selection_profile_pic
 android：layout_width =wrap_content
 android：layout_height =wrap_content
 android：layout_gravity =center
 android：gravity = 
 app：is_cropped =true
 facebook：preset_size =small/> 
< / LinearLayout> 
  

我也尝试过

  xmlns：facebook =http://schemas.android.com/apk/res/com.facebook.samples.profilepicture
  

但没有工作

这是我的project.properties文件：

  target = android-18 
 android.library = false 
 android.library.reference.1 = .. \\actionbarsherlock 
 android.library .reference.2 = .. \\library 
 android.library.reference.3 = .. / facebook-android-sdk-3.6.0 / facebook 
  / pre> 
 
 
尝试将其更改为
  target = android-18 
 android.library = false 
 android.library.reference.1 = .. \\actionbarsherlock 
 android.library.reference.2 = .. \\library 
 android.library.reference.3 = .. \\facebook-android-sdk-3.6.0\facebook 
  
但没有结果
 
 
 
  
解决方案
您的XML中有两个错误。 
 
 
 
 1）您没有声明命名空间app
 
 
 
 2）您已经声明了命名空间 xmlns：fb =http://schemas.android.com/apk/res-auto，但您将其称为Facebook，即facebook：preset_size 
 
 
 
您可以通过
 
 
 
来修复此问题1）为app添加命名空间声明，即 xmlns：app =http://schemas.android .com / apk / res-auto 
 
 
 
 2）将fb命名空间声明重命名为facebook，即 xmlns： http://schemas.android.com/apk/res-auto 
 
Yes I have this error at the 
<com.facebook.widget.ProfilePictureView 
line and this is a question that has been asked numerous times on stackoverflow, and every time it seems it has been fixed by adding xmlns:fb="http://schemas.android.com/apk/res-auto" at the top. Well that didnt solve it for me, dont know why :( So what do I do?
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:fb="http://schemas.android.com/apk/res-auto"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginTop="20dp"
    android:gravity="center_horizontal"
    android:orientation="horizontal" >

    <com.facebook.widget.ProfilePictureView
        android:id="@+id/selection_profile_pic"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:gravity="center_horizontal"
        app:is_cropped="true"
        facebook:preset_size="small" />
</LinearLayout>
I also tried 
xmlns:facebook="http://schemas.android.com/apk/res/com.facebook.samples.profilepicture"
but didnt work as well

This is my project.properties file:
target=android-18
android.library=false
android.library.reference.1=..\\actionbarsherlock
android.library.reference.2=..\\library
android.library.reference.3=../facebook-android-sdk-3.6.0/facebook
tried changing it to 
target=android-18
android.library=false
android.library.reference.1=..\\actionbarsherlock
android.library.reference.2=..\\library
android.library.reference.3=..\\facebook-android-sdk-3.6.0\facebook
but no results either

解决方案
You have two errors in your XML. 

1) you have not declared the namespace "app"

2) you have declared the namespace xmlns:fb="http://schemas.android.com/apk/res-auto" but you are refering it as "facebook" i.e. facebook:preset_size

you can fix this by 

1) Adding a namespace declaration for "app" i.e. xmlns:app="http://schemas.android.com/apk/res-auto"

2) renaming your "fb" namespace declaration to "facebook" i.e. xmlns:facebook="http://schemas.android.com/apk/res-auto" 

                        
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