无法实例化类：android.support.v7.widget.ShareActionProvidor

Question

我使用 android.support.v7.widget.ShareActionProvider 来支持旧设备，但每当我运行应用程序时，我得到类未找到异常是 Log cat

07-27 16:32:19.954：W/SupportMenuInflater(16559)：无法实例化类：anroid.support.v7.widget.ShareActionProvidor 07-27 16:32:19.954：W/SupportMenuInflater(16559)：java.lang.ClassNotFoundException：在路径上找不到类“anroid.support.v7.widget.ShareActionProvidor”：DexPathList [[zip 文件“/data/ app/com.example.sunshine-2.apk"],nativeLibraryDirectories=[/data/app-lib/com.example.sunshine-2, /system/lib]] 07-27 16:32:19.954: W/SupportMenuInflater(16559): 在 dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56) 07-27 16:32:19.954: W/SupportMenuInflater(16559): 在 java.lang.ClassLoader.loadClass(ClassLoader.java:497) 07-27 16:32:19.954: W/SupportMenuInflater(16559): 在 java.lang.ClassLoader.loadClass(ClassLoader.java:457) 07-27 16:32:19.954: W/SupportMenuInflater(16559): 在 android.support.v7.internal.view.SupportMenuInflater$MenuState.newInstance(SupportMenuInflater.java:480) 07-27 16:32:19.954: W/SupportMenuInflater(16559): 在 android.support.v7.internal.view.SupportMenuInflater$MenuState.readItem(SupportMenuInflater.java:383) 07-27 16:32:19.954: W/SupportMenuInflater(16559): 在 android.support.v7.internal.view.SupportMenuInflater.parseMenu(SupportMenuInflater.java:168) 07-27 16:32:19.954: W/SupportMenuInflater(16559): 在 android.support.v7.internal.view.SupportMenuInflater.inflate(SupportMenuInflater.java:118) 07-27 16:32:19.954: W/SupportMenuInflater(16559): 在 com.example.sunshine.DetailActivity$DetailFragment.onCreateOptionsMenu(DetailActivity.java:68) 07-27 16:32:19.954: W/SupportMenuInflater(16559): 在 android.support.v4.app.Fragment.performCreateOptionsMenu(Fragment.java:1586) 07-27 16:32:19.954: W/SupportMenuInflater(16559): 在 android.support.v4.app.FragmentManagerImpl.dispatchCreateOptionsMenu(FragmentManager.java:1973) 07-27 16:32:19.954: W/SupportMenuInflater(16559): 在 android.support.v4.app.FragmentActivity.onCreatePanelMenu(FragmentActivity.java:226) 07-27 16:32:19.954: W/SupportMenuInflater(16559): 在 android.support.v7.app.ActionBarActivity.superOnCreatePanelMenu(ActionBarActivity.java:233) 07-27 16:32:19.954: W/SupportMenuInflater(16559): 在 android.support.v7.app.ActionBarActivityDelegateICS.onCreatePanelMenu(ActionBarActivityDelegateICS.java:146) 07-27 16:32:19.954: W/SupportMenuInflater(16559): 在 android.support.v7.app.ActionBarActivity.onCreatePanelMenu(ActionBarActivity.java:200) 07-27 16:32:19.954: W/SupportMenuInflater(16559): 在 android.support.v7.app.ActionBarActivityDelegateICS$WindowCallbackWrapper.onCreatePanelMenu(ActionBarActivityDelegateICS.java:293) 07-27 16:32:19.954: W/SupportMenuInflater(16559): 在 com.android.internal.policy.impl.PhoneWindow.preparePanel(PhoneWindow.java:436) 07-27 16:32:19.954: W/SupportMenuInflater(16559): 在 com.android.internal.policy.impl.PhoneWindow.doInvalidatePanelMenu(PhoneWindow.java:800) 07-27 16:32:19.954: W/SupportMenuInflater(16559): 在 com.android.internal.policy.impl.PhoneWindow$1.run(PhoneWindow.java:221) 07-27 16:32:19.954: W/SupportMenuInflater(16559): 在 android.os.Handler.handleCallback(Handler.java:733) 07-27 16:32:19.954: W/SupportMenuInflater(16559): 在 android.os.Handler.dispatchMessage(Handler.java:95) 07-27 16:32:19.954: W/SupportMenuInflater(16559): 在 android.os.Looper.loop(Looper.java:136) 07-27 16:32:19.954: W/SupportMenuInflater(16559): 在 android.app.ActivityThread.main(ActivityThread.java:5017) 07-27 16:32:19.954: W/SupportMenuInflater(16559): 在 java.lang.reflect.Method.invokeNative(Native Method) 07-27 16:32:19.954: W/SupportMenuInflater(16559): 在 java.lang.reflect.Method.invoke(Method.java:515) 07-27 16:32:19.954: W/SupportMenuInflater(16559): 在 com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 07-27 16:32:19.954: W/SupportMenuInflater(16559): 在 com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 07-27 16:32:19.954: W/SupportMenuInflater(16559): 在 dalvik.system.NativeStart.main(Native Method)

这是一个代码

private String data;

        public DetailFragment() {
            setHasOptionsMenu(true);
        }

        @Override
        public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
            // Inflate the menu; this adds items to the action bar if it is present.
            inflater.inflate(R.menu.detailfragment, menu);

            // Retrieve the share menu item
            MenuItem menuItem = menu.findItem(R.id.action_share);

            // Get the provider and hold onto it to set/change the share intent.
            ShareActionProvider mShareActionProvider =
                    (ShareActionProvider) MenuItemCompat.getActionProvider(menuItem);

            // Attach an intent to this ShareActionProvider.  You can update this at any time,
            // like when the user selects a new piece of data they might like to share.
            if (mShareActionProvider != null ) {
                mShareActionProvider.setShareIntent(createShareForecastIntent());
            } else {
                Log.d("SAP", "Share Action Provider is null?");
            }
        }

        private Intent createShareForecastIntent() {
            Intent shareIntent = new Intent(Intent.ACTION_SEND);
            shareIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
            shareIntent.setType("text/plain");
            shareIntent.putExtra(Intent.EXTRA_TEXT,
                    data + "#Sunshine");
            return shareIntent;
        }

Answer 1

如果存在，则必须是android.support.v7.widget.ShareActionProvider

您似乎拼错了 xml 中的名称或其所在位置。