ShareActionProvider 为空 [英] ShareActionProvider is null

问题描述

我已经搜索了 3 或 4 天的解决方案.我努力了:使用支持库共享操作提供程序时出现空指针异常或者为什么 MenuItemCompat.getActionProvider 返回 null? 和其他一些但我在 ShareActionProvider 上仍然为空.我对开发 Android 应用程序还很陌生，所以我真的需要一些帮助.

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.

我的 xml 菜单文件是:

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>

我的片段是:

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;
    }
}

作为导入，我有:

import android.support.v7.widget.ShareActionProvider;

推荐答案

您可以创建一个 ShareActionProvider 并分配它.

You could just create a ShareActionProvider and assign it.

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

这篇关于ShareActionProvider 为空的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！