ShareActionProvider为null [英] ShareActionProvider is null

问题描述

我一直在寻找关于这个解决方案3或4天。我努力了：
<一href=\"http://stackoverflow.com/questions/19131873/null-pointer-exception-in-using-support-library-share-action-provider\">Null使用支持库共享行动提供商指针异常
要么
<一href=\"http://stackoverflow.com/questions/19358510/why-menuitemcompat-getactionprovider-returns-null\">why MenuItemCompat.getActionProvider返回null？以及其他一些
但我仍得空上ShareActionProvider。我是pretty新开发的Andr​​oid应用程序，所以我真的需要一些帮助。

我的XML菜单文件是：

 ＆LT;菜单的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android
的xmlns：程序=htt​​p://schemas.android.com/apk/res-auto＆GT;
＆LT;项目
    机器人：ID =@ + ID / action_share
    机器人：标题=@字符串/ action_share
    应用：showAsAction =总是
    机器人：图标=@机器人：可绘制/ ic_menu_share
    机器人：actionProviderClass =android.support.v7.widget.ShareActionProvider/＆GT;＆LT; /菜单＆gt;
 

和我的片段是：

 公共静态类DailyActivityFragment扩展片段{
    私有静态最后弦乐LOG_TAG =Dailyshare;
    私人ShareActionProvider mShareActionProvider;    公共DailyActivityFragment（）{
        setHasOptionsMenu（真）;
    }    @覆盖
    公共查看onCreateView（LayoutInflater充气器，容器的ViewGroup，
                             捆绑savedInstanceState）{
        查看rootView = inflater.inflate（R.layout.fragment_detail，集装箱，FALSE）;
        返回rootView;
    }    公共无效onCreateOptionsMenu（菜单菜单，MenuInflater气筒）{
        inflater.inflate（R.menu.detailfragment，菜单）;
        菜单项项= menu.findItem（R.id.action_share）;
        mShareActionProvider =（ShareActionProvider）MenuItemCompat.getActionProvider（项目）;
        如果（mShareActionProvider！= NULL）{
            mShareActionProvider.setShareIntent（createShareIntent（））;
        }其他{
            Log.i（LOG_TAG，为空）;
        }
    }    私人意图createShareIntent（）{
        意图shareIntent =新意图（Intent.ACTION_SEND）;
        shareIntent.setType（text / plain的）;
        shareIntent.putExtra（Intent.EXTRA_TEXT，
                这段文字将共享）;
        返回shareIntent;
    }
}
 

为导入我有：

 进口android.support.v7.widget.ShareActionProvider;
 

解决方案

您可以只创建一个ShareActionProvider，并为其分配。

  mShareActionProvider =新ShareActionProvider（）;
mShareActionProvider.setShareIntent（createShareIntent（））
MenuItemCompat.setActionProvider（项目，mShareActionProvider）;
 

I have been searching for 3 or 4 days about a solution on this. I have tried: Null Pointer exception in using support library share action provider or why MenuItemCompat.getActionProvider returns null? and some others but still I get null on ShareActionProvider. I am pretty new on developing android apps so I really need some help.

My xml menu file is:

<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
    android:id="@+id/action_share"
    android:title="@string/action_share"
    app:showAsAction="always"
    android:icon="@android:drawable/ic_menu_share"
    android:actionProviderClass="android.support.v7.widget.ShareActionProvider"/></menu>

and my fragment is:

public static class DailyActivityFragment extends Fragment {
    private static final String LOG_TAG = "Dailyshare";
    private ShareActionProvider mShareActionProvider;

    public DailyActivityFragment() {
        setHasOptionsMenu(true);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_detail, container, false);
        return rootView;
    }

    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater){
        inflater.inflate(R.menu.detailfragment, menu);
        MenuItem item = menu.findItem(R.id.action_share);
        mShareActionProvider = (ShareActionProvider) MenuItemCompat.getActionProvider(item);
        if (mShareActionProvider != null) {
            mShareActionProvider.setShareIntent(createShareIntent());
        }else{
            Log.i(LOG_TAG, "is null");
        }
    }

    private Intent createShareIntent() {
        Intent shareIntent = new Intent(Intent.ACTION_SEND);
        shareIntent.setType("text/plain");
        shareIntent.putExtra(Intent.EXTRA_TEXT,
                "this text will be shared");
        return shareIntent;
    }
}

as an import I have:

import android.support.v7.widget.ShareActionProvider;

解决方案

You could just create a ShareActionProvider and assign it.

mShareActionProvider = new ShareActionProvider();
mShareActionProvider.setShareIntent(createShareIntent())
MenuItemCompat.setActionProvider(item, mShareActionProvider);

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