android - 使用 Facebook SDK 4.0.1 膨胀类 com.facebook.widget.LoginButton 时出错

Question

我知道这是一个非常常见的问题，但是我已经阅读了所有堆栈溢出问题但没有找到答案。

我正在尝试使用通过 Gradle 添加的 Facebook SDK 4.0.1 集成 Facebook 登录按钮，但出现以下错误。

  java.lang.RuntimeException: Unable to start activity ComponentInfo{se.speedle.android/com.bryderi.speedle.android.activity.MainActivity}: android.view.InflateException: Binary XML file line #26: Error inflating class com.facebook.widget.LoginButton
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
        at android.app.ActivityThread.access$600(ActivityThread.java:141)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:137)
        at android.app.ActivityThread.main(ActivityThread.java:5103)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:525)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
        at dalvik.system.NativeStart.main(Native Method)
 Caused by: android.view.InflateException: Binary XML file line #26: Error inflating class com.facebook.widget.LoginButton
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:707)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:758)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
        at android.support.v7.app.ActionBarActivityDelegateBase.setContentView(ActionBarActivityDelegateBase.java:228)
        at android.support.v7.app.ActionBarActivity.setContentView(ActionBarActivity.java:102)
        at com.bryderi.speedle.android.activity.MainActivity.onCreate(MainActivity.java:36)
        at android.app.Activity.performCreate(Activity.java:5133)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
            at android.app.ActivityThread.access$600(ActivityThread.java:141)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:5103)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:525)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
            at dalvik.system.NativeStart.main(Native Method)
 Caused by: java.lang.ClassNotFoundException: Didn't find class "com.facebook.widget.LoginButton" on path: DexPathList[[zip file "/data/app/se.speedle.android-1.apk"],nativeLibraryDirectories=[/data/app-lib/se.speedle.android-1, /system/lib]]
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:53)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
        at android.view.LayoutInflater.createView(LayoutInflater.java:559)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696)
            at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
            at android.view.LayoutInflater.rInflate(LayoutInflater.java:758)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
            at android.support.v7.app.ActionBarActivityDelegateBase.setContentView(ActionBarActivityDelegateBase.java:228)
            at android.support.v7.app.ActionBarActivity.setContentView(ActionBarActivity.java:102)
            at com.bryderi.speedle.android.activity.MainActivity.onCreate(MainActivity.java:36)
            at android.app.Activity.performCreate(Activity.java:5133)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
            at android.app.ActivityThread.access$600(ActivityThread.java:141)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:5103)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:525)

我可以在 Android Studio 中看到 LoginButton 类，所以它有点工作

这是我的 build.gradle 依赖项

dependencies {

aspects 'org.robobinding:robobinding:0.8.9'
compile 'org.springframework.android:spring-android-rest-template:2.0.0.M1'
compile 'com.android.support:appcompat-v7:21.0.3'
compile 'com.android.support:support-v4:21.0.3'
compile 'com.android.support:support-v13:21.0.3'

compile 'com.android.support:recyclerview-v7:21.0.3'
compile 'com.fasterxml.jackson.core:jackson-databind:2.3.2'
compile 'com.jakewharton:butterknife:6.1.0'
compile 'com.facebook.android:facebook-android-sdk:4.0.1'
compile 'me.alexrs:recyclerview-renderers:1.0.3'
compile 'com.google.android.gms:play-services:6.5.87'
}

这是我的布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:facebook="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center_horizontal"
    android:orientation="vertical"
    android:padding="20dp" >

    <com.facebook.widget.LoginButton
        android:id="@+id/connectWithFbButton"
        style="@style/com_facebook_loginview_default_style"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:layout_gravity="center_horizontal"
        android:text="  connect_with_facebook"/>
</LinearLayout>

以及我 Activity 的相关部分

@Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        FacebookSdk.sdkInitialize(getApplicationContext());


        callbackManager = CallbackManager.Factory.create();


        setContentView(R.layout.activity_main);

        // Set a Toolbar to replace the ActionBar.
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        // Find our drawer view
        dlDrawer = (FragmentNavigationDrawer) findViewById(R.id.drawer_layout);
        // Setup drawer view
        dlDrawer.setupDrawerConfiguration((ListView) findViewById(R.id.lvDrawer), toolbar,
                R.layout.drawer_nav_item, R.id.flContent);
        // Add nav items
        dlDrawer.addNavItem("Home", "First Fragment", ClassifiedsFragment.class);
        dlDrawer.addNavItem("Favourites", "Favourites", ClassifiedsFragment.class);
        dlDrawer.addNavItem("My Items", "Items", ClassifiedsFragment.class);
        dlDrawer.addNavItem("Settings", "Settings", ClassifiedsFragment.class);


        //dlDrawer.addNavItem("Second", "Second Fragment", SecondFragment.class);
        //dlDrawer.addNavItem("Third", "Third Fragment", ThirdFragment.class);
        // Select default
        if (savedInstanceState == null) {
            dlDrawer.selectDrawerItem(0);
        }
    }

Answer 1

Caused by: The SDK has not been initialized, make sure to call FacebookSdk.sdkInitialize() first.

确保在 setContentView 之前初始化了 facebook SDK。

FacebookSdk.sdkInitialize(getApplicationContext());
setContentView(R.layout.activity_main);