动作栏上的共享按钮？

Question

我目前正在构建一个需要共享图像的应用程序。 我已经完成XML并显示了共享按钮，但是您不能单击它。

这是我的XML按钮代码：

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
    <item android:id="@+id/menu_item_scan"
          android:icon="@drawable/scanlogo"
          android:showAsAction="ifRoom"
          android:title="Scan" />
    <item android:id="@+id/menu_item_share"
          android:showAsAction="ifRoom"
          android:title="Share"
          android:actionProviderClass="android.widget.ShareActionProvider" />
</menu>

这是我在菜单上膨胀的地方：

public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.action_bar_share_menu, menu);
    return true;
}

所有这些都有效，并且显示出来，但是它不可单击。 这是我尝试使其可点击的位置：

public boolean onOptionsItemSelected(MenuItem item) {
        // Handle presses on the action bar items
        switch (item.getItemId()) {
            case R.id.menu_item_share:
                Intent ShareIntent = new Intent();
                String pathofBmp = MediaStore.Images.Media.insertImage(getContentResolver(), QRMap,"QRCode", null);
                Uri bmpUri = Uri.parse(pathofBmp);
                ShareIntent.setAction(Intent.ACTION_SEND);
                ShareIntent.putExtra(Intent.EXTRA_STREAM, bmpUri);


  ShareIntent.setType("image/png");
            mShareActionProvider.setShareIntent(ShareIntent);
            return true;

        default:
            return super.onOptionsItemSelected(item);
    }
}

任何帮助将非常感激！

Answer 1

删除onOptionsItemSelected()方法的R.id.menu_item_share案例。 将该代码移动到应用程序中的其他位置，例如onCreateOptionsMenu() ，以在显示ShareActionProvider之前对其进行配置。

例如，这是一个配置我的示例项目中的ShareActionProvider的活动：

/***
  Copyright (c) 2012 CommonsWare, LLC
  Licensed under the Apache License, Version 2.0 (the "License"); you may not
  use this file except in compliance with the License. You may obtain   a copy
  of the License at http://www.apache.org/licenses/LICENSE-2.0. Unless required
  by applicable law or agreed to in writing, software distributed under the
  License is distributed on an "AS IS" BASIS,   WITHOUT WARRANTIES OR CONDITIONS
  OF ANY KIND, either express or implied. See the License for the specific
  language governing permissions and limitations under the License.

  From _The Busy Coder's Guide to Android Development_
    http://commonsware.com/Android
 */

package com.commonsware.android.sap;

import android.content.Intent;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.widget.EditText;
import android.widget.Toast;
import com.actionbarsherlock.app.SherlockActivity;
import com.actionbarsherlock.view.Menu;
import com.actionbarsherlock.view.MenuInflater;
import com.actionbarsherlock.widget.ShareActionProvider;

public class MainActivity extends SherlockActivity implements
    ShareActionProvider.OnShareTargetSelectedListener, TextWatcher {
  private ShareActionProvider share=null;
  private Intent shareIntent=new Intent(Intent.ACTION_SEND);
  private EditText editor=null;

  @Override
  public void onCreate(Bundle icicle) {
    super.onCreate(icicle);
    setContentView(R.layout.activity_main);

    shareIntent.setType("text/plain");
    editor=(EditText)findViewById(R.id.editor);
    editor.addTextChangedListener(this);
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    new MenuInflater(this).inflate(R.menu.actions, menu);

    share=
        (ShareActionProvider)menu.findItem(R.id.share)
                                 .getActionProvider();
    share.setOnShareTargetSelectedListener(this);

    return(super.onCreateOptionsMenu(menu));
  }

  @Override
  public boolean onShareTargetSelected(ShareActionProvider source,
                                       Intent intent) {
    Toast.makeText(this, intent.getComponent().toString(),
                   Toast.LENGTH_LONG).show();

    return(false);
  }

  @Override
  public void afterTextChanged(Editable s) {
    shareIntent.putExtra(Intent.EXTRA_TEXT, editor.getText());
    share.setShareIntent(shareIntent);
  }

  @Override
  public void beforeTextChanged(CharSequence s, int start, int count,
                                int after) {
    // ignored
  }

  @Override
  public void onTextChanged(CharSequence s, int start, int before,
                            int count) {
    // ignored
  }
}

就我而言，这是使用ActionBarSherlock，但本机操作栏也使用相同的过程。