android - Facebook 与 android studio 共享

Question

亲爱的 stackoverflow 用户，

恐怕我急需帮助。我的应用程序一直遇到一个问题。我正在制作一个具有三个按钮的应用程序:一个用于查看链接，一个用于 Intent ，一个用于在 Facebook 上共享内容(原因是您不能再发送有 Intent 的内容，或者有人告诉我)然而，根据 Facebook 开发者网站，我应该得到一个分享按钮。使用我的代码，一切都崩溃了，我唯一能看到的就是共享对话框。我的问题是，我犯的主要错误是什么？

我的主要 Activity 代码:

package things;
import android.app.Fragment;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.support.v4.app.FragmentActivity;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.webkit.JavascriptInterface;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.view.View.OnClickListener;

import com.facebook.CallbackManager;
import com.facebook.FacebookCallback;
import com.facebook.FacebookException;
import com.facebook.FacebookSdk;
import com.facebook.share.ShareApi;
import com.facebook.share.Sharer;
import com.facebook.share.model.ShareLinkContent;
import com.facebook.share.widget.ShareButton;
import com.facebook.share.widget.ShareDialog;

import java.util.Random;


public class MainActivity extends ActionBarActivity {

private Button btnScore;
private Button btnShare;

private static String APP_ID = "things";

CallbackManager callbackManager;
ShareDialog shareDialog;

//ms = mobile Scores
WebView msWebView;
WebView mfWebView;


ShareLinkContent content = new ShareLinkContent.Builder()
        .setContentTitle("Test")
        .setContentUrl(Uri.parse("http://developers.facebook.com/android"))
        .setContentDescription("Play Something with your facebook friends and many more people!")
        .build();


@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    FacebookSdk.sdkInitialize(getApplicationContext());

    //Facebook for  sharing
    callbackManager = CallbackManager.Factory.create();
    shareDialog = new ShareDialog(this);
    final ShareButton shareButton = (ShareButton) findViewById(R.id.fb_share_button);


    int score = 64;

    //Searches the phone for apps that can share simple data
    final Intent sendIntent = new Intent();
    sendIntent.setAction(Intent.ACTION_SEND);
    sendIntent.setType("text/plain");
    sendIntent.putExtra(Intent.EXTRA_TEXT, "My score of the last game  was: " + score + " \n Can you beat my score?");

    //This is for the share dialog to show





    //an iff statement if it shows
    if (ShareDialog.canShow(ShareLinkContent.class)) {
        ShareLinkContent linkContent = new ShareLinkContent.Builder()
                .setContentTitle("Hello Facebook")
                .setContentDescription(
                        "The 'Hello Facebook' sample  showcases simple Facebook integration")
                .setContentUrl(Uri.parse("http://developers.facebook.com/android"))
                .build();

        shareDialog.show(linkContent);
    }
    shareButton.setShareContent(content);

    //The buttons
    btnScore=(Button)findViewById(R.id.btnScores);
    btnShare =(Button)findViewById(R.id.btnShare);



    //the score Webview link
    msWebView = new WebView(this);
    msWebView.loadUrl("Thing");
    msWebView.setWebViewClient(new WebViewClient(){
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String     url){
            view.loadUrl(url);
            return true;
        }
    });

   ShareDialog.show(this, content);
   btnScore.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View vw) {
            setContentView(msWebView);
        }
    });

    //the share button
    btnShare.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View vw)     {startActivity(Intent.createChooser(sendIntent, "share..."));

        }
    });
    shareButton.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            shareButton.setShareContent(content);
        }
    }     );
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu.
    // Adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_main, menu);

    // Access the Share Item defined in menu XML


    return true;
}

//special method to handle the callbackmanager
@Override
protected void onActivityResult(final int requestCode, final int  resultCode, final Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    callbackManager.onActivityResult(requestCode, resultCode, data);
    ShareDialog.show(this, content);
}

@Override
  public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.menu_item_share) {
       return true;
    }

    return super.onOptionsItemSelected(item);
}


}

我的 Activity_Main.XML:

<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"     tools:context=".MainActivity"
android:background="#ffd2e489">

<TextView android:text="Results"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/text"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true" />

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="View"
    android:id="@+id/btnScores"
    android:background="#ffff7878"
    android:layout_marginTop="40dp"
    android:layout_below="@+id/text"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"
    android:layout_toLeftOf="@+id/text"
    android:layout_toStartOf="@+id/text" />

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Share"
    android:id="@+id/btnShare"
    android:background="#ff20f6ff"
    android:layout_alignTop="@+id/btnScores"
    android:layout_toRightOf="@+id/text"
    android:layout_alignParentRight="true"
    android:layout_alignParentEnd="true" />

<com.facebook.share.widget.ShareButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/fb_share_button"
android:text="SHARE"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="175dp" />


</RelativeLayout>

以防万一我的 Android: list :

<uses-permission android:name="android.permission.INTERNET" />
<application
    android:name=".MyApplication"
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <meta-data android:name="com.facebook.sdk.ApplicationId"    android:value="@string/app_id"/>
    <activity

        android:name=".MainActivity"
        android:label="@string/app_name" >

        <intent-filter>
            <provider   android:authorities="com.facebook.app.FacebookContentProviderthings"
                android:name="com.facebook.FacebookContentProvider"
                android:exported="true"/>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.DEFAULT"/>
            <data android:mimeType="text/plain"/>
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity android:name="com.facebook.FacebookActivity"
        android:configChanges=
            "keyboard|keyboardHidden|screenLayout|screenSize|orientation"
        android:theme="@android:style/Theme.Translucent.NoTitleBar"
        android:label="@string/app_name" />
    android:debuggable="true"
</application>

</manifest>

抱歉发了这么长的帖子，我知道答案就在那里，但找不到那个令人毛骨悚然的错误，这已经困扰我一周了。

感谢阅读!

弗雷德里克

编辑:我正在使用 facebookSDK 4.0。

编辑 2.0:错误:

 Caused by: java.lang.NullPointerException
        at things.MainActivity.onCreate(MainActivity.java:93)
        at android.app.Activity.performCreate(Activity.java:5231)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2201)

编辑 3.0 的 Logcat:

 Process: nl.test.test, PID: 12287
java.lang.ExceptionInInitializerError
        at java.lang.reflect.Constructor.constructNative(Native Method)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at android.view.LayoutInflater.createView(LayoutInflater.java:594)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
        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:240)
        at android.support.v7.app.ActionBarActivity.setContentView(ActionBarActivity.java:102)
        at nl.test.test.MainActivity.onCreate(MainActivity.java:60)
        at android.app.Activity.performCreate(Activity.java:5231)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2201)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2286)
        at android.app.ActivityThread.access$800(ActivityThread.java:144)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1246)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:212)
        at android.app.ActivityThread.main(ActivityThread.java:5135)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:515)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:878)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
        at dalvik.system.NativeStart.main(Native Method)
 Caused by: null
        at com.facebook.internal.Validate.sdkInitialized(Validate.java:99)
        at com.facebook.FacebookSdk.getCallbackRequestCodeOffset(FacebookSdk.java:735)
        at com.facebook.internal.CallbackManagerImpl$RequestCodeOffset.toRequestCode(CallbackManagerImpl.java:109)
        at com.facebook.share.widget.ShareButton.<clinit>   (ShareButton.java:36)
    at java.lang.reflect.Constructor.constructNative(Native Method)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at android.view.LayoutInflater.createView(LayoutInflater.java:594)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696)

android.view.LayoutInflater.rInflate(LayoutInflater.java:755)

android.view.LayoutInflater.inflate(LayoutInflater.java:492)



android.view.LayoutInflater.inflate(LayoutInflater.java:397)

   android.view.LayoutInflater.inflate(LayoutInflater.java:353)
android.support.v7.app.ActionBarActivityDelegateBase.setContentView(ActionBarActivityDelegateBase.java:240)
                android.support.v7.app.ActionBarActivity.setContentView(ActionBarActivity.java:102)
            test.MainActivity.onCreate(MainActivity.java:60)
            at android.app.Activity.performCreate(Activity.java:5231)
             android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
            android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2201)
            android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2286)
            android.app.ActivityThread.access$800(ActivityThread.java:144)                   android.app.ActivityThread$H.handleMessage(ActivityThread.java:1246)
            android.os.Handler.dispatchMessage(Handler.java:102)
            android.os.Looper.loop(Looper.java:212)
        android.app.ActivityThread.main(ActivityThread.java:5135)
        java.lang.reflect.Method.invokeNative(Native Method)
        java.lang.reflect.Method.invoke(Method.java:515)
        com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:878)
        com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
dalvik.system.NativeStart.main(Native Method)

Answer 1

好的，经过一些工作，我找到了答案。答案很简单:而不是这个:

super.onCreate(savedInstanceState);
FacebookSdk.sdkInitialize(getApplicationContext());

但是你需要做的是:

FacebookSdk.sdkInitialize(getApplicationContext()); 
super.onCreate(savedInstanceState);

之所以这样做，是因为您想在创建应用程序实例之前初始化 Facebook SDK，否则应用程序永远无法使用 Facebook SDK。

我希望如果有人遇到和我一样的问题，可以使用这个!