[英]Facebook Sharing with android studio
亲爱的stackoverflow人,
我担心我急需帮助。 我的应用程序遇到了一个问题。 我正在创建一个有三个按钮的应用程序:一个用于查看链接,一个用于意图,一个用于在Facebook上分享内容(原因是由于您无法再发送具有意图的内容,或者因此我被告知)但是,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,一切崩溃,我唯一能看到的是共享对话框。 我的问题是,我犯的主要错误是什么?
我的主要活动代码:
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>
以防我的Android:Manifest:
<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>
对不起,很长的帖子,我知道答案在那里,但找不到绿色错误,这一直困扰我一个星期。
谢谢阅读!
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 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)
好吧,经过一番工作,我找到了答案。 答案很简单:不是这样的:
super.onCreate(savedInstanceState);
FacebookSdk.sdkInitialize(getApplicationContext());
但你需要做的是:
FacebookSdk.sdkInitialize(getApplicationContext());
super.onCreate(savedInstanceState);
这样做的原因是因为您想在创建应用程序实例之前初始化Facebook SDK,否则Facebook SDK永远不会被应用程序使用。
我希望如果有人遇到和我一样的问题,可以使用这个!
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