安卓 WebView : Override Contextual Action Bar

Question

我正在尝试覆盖 Android Webview 中的上下文操作栏。当我长按选定的单词时，会显示自定义操作栏。但是，当我单击操作栏按钮时，没有任何反应。

似乎没有调用 onContextItemSelected() 函数。这是我的代码:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.dictionary);
   mWebView = (WebView) findViewById(R.id.wv);
}

@Override
public boolean onContextItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case R.id.save_word:
            Toast.makeText(CheckDictionary.this,"Save Word Meaning Successfully",Toast.LENGTH_LONG).show();
            break;
        default:
            break;
    }
    if (mActionMode != null) {
        mActionMode.finish();
    }
    return super.onContextItemSelected(item);
}

@Override
public void onActionModeStarted(ActionMode mode) {
    if (mActionMode == null) {
        mActionMode = mode;
        mode.setTitle("Save Word Meaning");
        Menu menu = mode.getMenu();
        menu.clear();
        mode.getMenuInflater().inflate(R.menu.dictionary_menu, menu);
    }
    super.onActionModeStarted(mode);
}

@Override
public void onActionModeFinished(ActionMode mode) {
    mActionMode = null;
    super.onActionModeFinished(mode);
}
}

Answer 1

我在我的旧项目中做这项工作是这样的:

 private String[] data = {"1", "2", "3", "4", "5", "6", "7", "8", "9","10"};

 private SelectionAdapter mAdapter;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     setContentView(R.layout.activity_main);

     mAdapter = new SelectionAdapter(this,
                 R.layout.row_list_item, R.id.textView1, data);
     setListAdapter(mAdapter);
     getListView().setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);

     getListView().setMultiChoiceModeListener(new MultiChoiceModeListener() {

         private int nr = 0;

         @Override
         public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
             // TODO Auto-generated method stub
             return false;
         }

         @Override
         public void onDestroyActionMode(ActionMode mode) {
             // TODO Auto-generated method stub
              mAdapter.clearSelection();
         }

         @Override
         public boolean onCreateActionMode(ActionMode mode, Menu menu) {
             // TODO Auto-generated method stub

             nr = 0;
             MenuInflater inflater = getMenuInflater();
             inflater.inflate(R.menu.contextual_menu, menu);
             return true;
         }

         @Override
         public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
             // TODO Auto-generated method stub
             switch (item.getItemId()) {

                 case R.id.item_delete:
                     nr = 0;
                     mAdapter.clearSelection();
                     mode.finish();
             }
            return false;
         }

         @Override
         public void onItemCheckedStateChanged(ActionMode mode, int position,
                 long id, boolean checked) {
             // TODO Auto-generated method stub
              if (checked) {
                     nr++;
                     mAdapter.setNewSelection(position, checked);                    
                 } else {
                     nr--;
                     mAdapter.removeSelection(position);                 
                 }
                 mode.setTitle(nr + " selected");

         }
     });

     getListView().setOnItemLongClickListener(new OnItemLongClickListener() {

         @Override
         public boolean onItemLongClick(AdapterView<? arg0, View arg1,
                 int position, long arg3) {
             // TODO Auto-generated method stub

             getListView().setItemChecked(position, !mAdapter.isPositionChecked(position));
             return false;
         }
     });
 }

 private class SelectionAdapter extends ArrayAdapter<String {

     private HashMap<Integer, Boolean mSelection = new HashMap<Integer, Boolean();

     public SelectionAdapter(Context context, int resource,
             int textViewResourceId, String[] objects) {
         super(context, resource, textViewResourceId, objects);
     }

     public void setNewSelection(int position, boolean value) {
         mSelection.put(position, value);
         notifyDataSetChanged();
     }

     public boolean isPositionChecked(int position) {
         Boolean result = mSelection.get(position);
         return result == null ? false : result;
     }

     public Set<Integer getCurrentCheckedPosition() {
         return mSelection.keySet();
     }

     public void removeSelection(int position) {
         mSelection.remove(position);
         notifyDataSetChanged();
     }

     public void clearSelection() {
         mSelection = new HashMap<Integer, Boolean();
         notifyDataSetChanged();
     }

     @Override
     public View getView(int position, View convertView, ViewGroup parent) {
         View v = super.getView(position, convertView, parent);//let the adapter handle setting up the row views
         v.setBackgroundColor(getResources().getColor(android.R.color.background_light));


         if (mSelection.get(position) != null) {
             v.setBackgroundColor(getResources().getColor(android.R.color.holo_blue_light);

         }
         return v;
     }
 } 

您可以根据需要更改此代码...