未安装Facebook应用程序时,facebook登录按钮单击失败

安装Facebook应用程序时,我的Facebook登录按钮正常工作.

当设备上没有安装Facebook应用程序时,它会崩溃我的应用程序:

E/AndroidRuntime: FATAL EXCEPTION: main                                                                 
java.lang.NoClassDefFoundError: Failed resolution of: 
Landroid/support/customtabs/CustomTabsIntent$Builder;
at com.facebook.internal.CustomTab.openCustomTab(CustomTab.java:47)
at com.facebook.CustomTabMainActivity.onCreate(CustomTabMainActivity.java:67)
at android.app.Activity.performCreate(Activity.java:6251)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.customtabs.CustomTabsIntent$Builder" on path: DexPathList[[zip file "/data/app/com.testapp-2/base.apk"],nativeLibraryDirectories=[/data/app/com.testapp-2/lib/arm, /data/app/com.testapp-2/base.apk!/lib/armeabi-v7a, /vendor/lib, /system/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
at com.facebook.internal.CustomTab.openCustomTab(CustomTab.java:47) 
at com.facebook.CustomTabMainActivity.onCreate(CustomTabMainActivity.java:67) 
at android.app.Activity.performCreate(Activity.java:6251) 
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107) 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369) 
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) 
at android.app.ActivityThread.-wrap11(ActivityThread.java) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:148) 
at android.app.ActivityThread.main(ActivityThread.java:5417) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
Suppressed: java.lang.ClassNotFoundException: android.support.customtabs.CustomTabsIntent$Builder
at java.lang.Class.classForName(Native Method)
at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
... 15 more
Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack trace available

表现:

而fb_login_protocol_scheme值根据需要以"fb"开头.

Gradle依赖项:

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    compile 'com.android.support:appcompat-v7:25.3.0'
    compile 'com.android.support:design:25.3.0'
    compile 'com.google.firebase:firebase-core:10.2.1'
    compile 'com.google.firebase:firebase-database:10.2.1'
    compile 'com.google.firebase:firebase-ads:10.2.1'
    compile ('com.facebook.android:facebook-android-sdk:4.20.0') // app invites
    {
        exclude group: 'com.android.support'
    }
    compile 'com.facebook.android:audience-network-sdk:4.20.0'
    compile "com.android.support:cardview-v7:25.3.0"
    testCompile 'junit:junit:4.12'
}

我该如何解决？

您将从facebook依赖项中排除"com.android.support".我认为这是因为它不包括与你相同版本的支持库(facebook sdk 4.20.0使用android:support:25.0.0但你包括支持库25.3.0,所以排除它是正确的做).

但是,如果您希望CustomTab功能正常工作,则必须在应用依赖项中包含相应的依赖项,因此请添加以下行:

compile 'com.android.support:customtabs:25.3.0'

它应该工作.