android - 使用 Facebook SDK 4.1.2 创建登录按钮时出现问题

Question

我正在尝试创建一个应用程序，允许用户通过他们的 Facebook 帐户登录。我想通过 Eclipse 使用新的 Facebook SDK 4.1.2。要在 Eclipse 中使用新的 SDK，我遵循了 this tutorial .我现在可以在不使用 eclipse 的情况下从 facebook SDK 中删除所有错误。然后，我开始关注 these steps以便使用新的 SDK 将 FB 集成到示例应用程序中。

我是这样进行的:

MainActivity:

import android.os.Bundle;
import android.support.v4.app.FragmentActivity;

import com.facebook.CallbackManager;
import com.facebook.FacebookSdk;

public class MainActivity extends FragmentActivity {


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        FacebookSdk.sdkInitialize(getApplicationContext());
        if (savedInstanceState == null) {
            getFragmentManager()
                    .beginTransaction()
                    .add(R.id.fragmentParentViewGroup, new FacebookFragment())
                    .commit();
        }
    }




}

activity_main.xml:

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
             xmlns:tools="http://schemas.android.com/tools"
             android:id="@+id/fragmentParentViewGroup"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             tools:context=".MyActivity"
             tools:ignore="MergeRootFrame" />

Facebook fragment :

import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.facebook.CallbackManager;
import com.facebook.FacebookCallback;
import com.facebook.FacebookException;
import com.facebook.FacebookSdk;
import com.facebook.login.LoginResult;
import com.facebook.login.widget.LoginButton;

public class FacebookFragment extends Fragment{
    CallbackManager callbackManager;
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup parentViewGroup,
                             Bundle savedInstanceState) {

        View rootView = inflater.inflate(R.layout.facebook_fragment, parentViewGroup, false);
        FacebookSdk.sdkInitialize(getActivity());
        callbackManager = CallbackManager.Factory.create();
        LoginButton loginButton = (LoginButton) rootView.findViewById(R.id.login_button);
        loginButton.setReadPermissions("user_friends");
        // If using in a fragment
       // loginButton.setFragment(this);    
     // Callback registration
        loginButton.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
            @Override
            public void onSuccess(LoginResult loginResult) {
                // App code
            }

            @Override
            public void onCancel() {
                // App code
            }

            @Override
            public void onError(FacebookException exception) {
                // App code
            }
        });    
        return rootView;
    }
}

facebook_fragment.xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" 
    >

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent" 
        android:background="#FFFFFF">

       <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" />   

    </RelativeLayout>

list :

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.facbooksdk4test"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="19" />

    <uses-permission android:name="android.permission.INTERNET" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.facbooksdk4test.MainActivity"
            android:label="@string/app_name"
            android:theme="@android:style/Theme.Translucent.NoTitleBar" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <meta-data
            android:name="com.facebook.sdk.ApplicationId"
            android:value="@string/facebook_app_id" />

        <activity
            android:name="com.facebook.FacebookActivity"
            android:configChanges="keyboard|keyboardHidden|screenLayout|screenSize|orientation"
            android:label="@string/app_name"
            android:theme="@android:style/Theme.Translucent.NoTitleBar" />
    </application>

</manifest>

完成上述所有操作后，我仍然遇到初始化错误。 logcat 报告:

06-01 15:23:41.670: E/AndroidRuntime(23571): FATAL EXCEPTION: main
06-01 15:23:41.670: E/AndroidRuntime(23571): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.facbooksdk4test/com.facbooksdk4test.MainActivity}: android.view.InflateException: Binary XML file line #13: Error inflating class com.facebook.login.widget.LoginButton
06-01 15:23:41.670: E/AndroidRuntime(23571):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2252)
06-01 15:23:41.670: E/AndroidRuntime(23571):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2306)
06-01 15:23:41.670: E/AndroidRuntime(23571):    at android.app.ActivityThread.access$700(ActivityThread.java:153)
06-01 15:23:41.670: E/AndroidRuntime(23571):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1286)
06-01 15:23:41.670: E/AndroidRuntime(23571):    at android.os.Handler.dispatchMessage(Handler.java:99)
06-01 15:23:41.670: E/AndroidRuntime(23571):    at android.os.Looper.loop(Looper.java:176)
06-01 15:23:41.670: E/AndroidRuntime(23571):    at android.app.ActivityThread.main(ActivityThread.java:5302)
06-01 15:23:41.670: E/AndroidRuntime(23571):    at java.lang.reflect.Method.invokeNative(Native Method)
06-01 15:23:41.670: E/AndroidRuntime(23571):    at java.lang.reflect.Method.invoke(Method.java:511)
06-01 15:23:41.670: E/AndroidRuntime(23571):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102)
06-01 15:23:41.670: E/AndroidRuntime(23571):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869)
06-01 15:23:41.670: E/AndroidRuntime(23571):    at dalvik.system.NativeStart.main(Native Method)
06-01 15:23:41.670: E/AndroidRuntime(23571): Caused by: android.view.InflateException: Binary XML file line #13: Error inflating class com.facebook.login.widget.LoginButton
06-01 15:23:41.670: E/AndroidRuntime(23571):    at android.view.LayoutInflater.createView(LayoutInflater.java:619)
06-01 15:23:41.670: E/AndroidRuntime(23571):    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:693)
06-01 15:23:41.670: E/AndroidRuntime(23571):    at android.view.LayoutInflater.rInflate(LayoutInflater.java:752)
06-01 15:23:41.670: E/AndroidRuntime(23571):    at android.view.LayoutInflater.rInflate(LayoutInflater.java:760)
06-01 15:23:41.670: E/AndroidRuntime(23571):    at android.view.LayoutInflater.inflate(LayoutInflater.java:495)
06-01 15:23:41.670: E/AndroidRuntime(23571):    at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
06-01 15:23:41.670: E/AndroidRuntime(23571):    at com.facbooksdk4test.FacebookFragment.onCreateView(FacebookFragment.java:22)
06-01 15:23:41.670: E/AndroidRuntime(23571):    at android.app.Fragment.performCreateView(Fragment.java:1699)
06-01 15:23:41.670: E/AndroidRuntime(23571):    at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:903)
06-01 15:23:41.670: E/AndroidRuntime(23571):    at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1075)
06-01 15:23:41.670: E/AndroidRuntime(23571):    at android.app.BackStackRecord.run(BackStackRecord.java:682)
06-01 15:23:41.670: E/AndroidRuntime(23571):    at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1455)
06-01 15:23:41.670: E/AndroidRuntime(23571):    at android.app.Activity.performStart(Activity.java:5335)
06-01 15:23:41.670: E/AndroidRuntime(23571):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2224)
06-01 15:23:41.670: E/AndroidRuntime(23571):    ... 11 more
06-01 15:23:41.670: E/AndroidRuntime(23571): Caused by: java.lang.reflect.InvocationTargetException
06-01 15:23:41.670: E/AndroidRuntime(23571):    at java.lang.reflect.Constructor.constructNative(Native Method)
06-01 15:23:41.670: E/AndroidRuntime(23571):    at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
06-01 15:23:41.670: E/AndroidRuntime(23571):    at android.view.LayoutInflater.createView(LayoutInflater.java:593)
06-01 15:23:41.670: E/AndroidRuntime(23571):    ... 24 more
06-01 15:23:41.670: E/AndroidRuntime(23571): Caused by: java.lang.NoClassDefFoundError: com.facebook.R$styleable
06-01 15:23:41.670: E/AndroidRuntime(23571):    at com.facebook.login.widget.LoginButton.parseLoginButtonAttributes(LoginButton.java:607)
06-01 15:23:41.670: E/AndroidRuntime(23571):    at com.facebook.login.widget.LoginButton.configureButton(LoginButton.java:571)
06-01 15:23:41.670: E/AndroidRuntime(23571):    at com.facebook.FacebookButtonBase.<init>(FacebookButtonBase.java:66)
06-01 15:23:41.670: E/AndroidRuntime(23571):    at com.facebook.login.widget.LoginButton.<init>(LoginButton.java:209)
06-01 15:23:41.670: E/AndroidRuntime(23571):    ... 27 more

我不确定哪里出了问题，或者应该如何解决这些问题。请建议我如何解决这个问题。

Answer 1

我在您的代码中没有看到 onActivityResult 方法。它是正确的 SDK 工作流程所必需的。

您需要将其添加到 MainActivity:

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    callbackManager.onActivityResult(requestCode, resultCode, data);
}

原因:

Every activity and fragment that you integrate with the FacebookSDK Login or Share should forward onActivityResult to the callbackManager.

您可以在文档中找到它 here .