在android中自定义选择文本操作？

Question

请帮助我，我怎么可以这样做： 我的TextView在我的项目，我想这样做：

• 选择文本
• 不喜欢拷贝一些行动，保存...在文本

我发现此代码为选择部分：

text= (TextView) findViewById(R.id.speech); 
    registerForContextMenu(text); 
    text.setTextIsSelectable(true); 

和d默认Sellection texs与复制和全部选择动作显示。

现在我的问题是，我如何定制它并添加其他操作？

这是我的课：

public class SellectedTexts extends AppCompatActivity implements ActionMode.Callback { 
    @Override 
    public boolean onCreateActionMode(ActionMode mode, Menu menu) { 
     // Log.d(Log, "onCreateActionMode"); 
     MenuInflater inflater = mode.getMenuInflater(); 
     inflater.inflate(R.menu.text_select, menu); 
      return true; 
     } 

    @Override 
     public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 
      return false; 
     } 

    @Override 
    public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 
     // Log.d(Log, String.format("onActionItemClicked item=%s/%d", item.toString(), item.getItemId())); 

     switch(item.getItemId()) { 

      case R.id.save: 
       File outputTXT =new File(Environment.getExternalStorageDirectory(), "App Folder"); 
       outputTXT.mkdir(); 


       if (!outputTXT.exists() && !outputTXT.mkdirs()) { //Can't make path to save pic. 


        //Log.d(DEBUG_TAG, "Can't create directory to save image"); 
        Toast.makeText(this, "File can't save.",Toast.LENGTH_LONG).show(); 
       } 


       Calendar calender =Calendar.getInstance(); 
       SimpleDateFormat simpleDateFormat =new SimpleDateFormat("yyyymmdd_hhmmss"); 
       String fileName =outputTXT.getPath() + File.separator + simpleDateFormat.format(calender.getTime())+" .txt"; 
       File pictureFile =new File(fileName); 

       try { 
        FileOutputStream fos = new FileOutputStream(pictureFile); 
        fos.write(MainActivity.speech_text.getText().toString().getBytes()); 
        fos.close(); 
        Toast.makeText(this, "File save in ExternalCard/Type-Yar folder.",Toast.LENGTH_LONG).show(); 
       } catch (Exception error) { //Can't save image. 

        // Log.d(DEBUG_TAG, "File not saved: " + error.getMessage()); 
        Toast.makeText(this, "File can't save.", Toast.LENGTH_LONG).show(); 
       } 
       mode.finish();// Finish and close the ActionMode 
       return true; 
     } 
     return true; 
    } 

    @Override 
    public void onDestroyActionMode(ActionMode mode) { 

    } 


} 

logcats：

E/AndroidRuntime: FATAL EXCEPTION: main 
                       Process: , PID: 5224 
                       java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.Resources android.content.Context.getResources()' on a null object reference 
                        at android.content.ContextWrapper.getResources(ContextWrapper.java:91) 
                        at android.view.ContextThemeWrapper.getResources(ContextThemeWrapper.java:74) 
                        at android.widget.Toast.<init>(Toast.java:132) 
                        at android.widget.Toast.makeText(Toast.java:434) 
                        at .SellectedTexts.onActionItemClicked(SellectedTexts.java:57) 
                        at android.widget.Editor$SelectionActionModeCallback.onActionItemClicked(Editor.java:3373) 
                        at com.android.internal.policy.impl.PhoneWindow$DecorView$ActionModeCallbackWrapper.onActionItemClicked(PhoneWindow.java:3946) 
                        at android.support.v7.view.SupportActionModeWrapper$CallbackWrapper.onActionItemClicked(SupportActionModeWrapper.java:168) 
                        at android.support.v7.app.AppCompatDelegateImplV7$ActionModeCallbackWrapperV7.onActionItemClicked(AppCompatDelegateImplV7.java:1703) 
                        at android.support.v7.app.AppCompatDelegateImplV7$ActionModeCallbackWrapperV7.onActionItemClicked(AppCompatDelegateImplV7.java:1703) 
                        at android.support.v7.view.StandaloneActionMode.onMenuItemSelected(StandaloneActionMode.java:136) 
                        at android.support.v7.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:811) 
                        at android.support.v7.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:152) 
                        at android.support.v7.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:958) 
                        at android.support.v7.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:948) 
                        at android.support.v7.widget.ActionMenuView.invokeItem(ActionMenuView.java:618) 
                        at android.support.v7.view.menu.ActionMenuItemView.onClick(ActionMenuItemView.java:139) 
                        at android.view.View.performClick(View.java:5254) 
                        at android.view.View$PerformClick.run(View.java:21179) 
                        at android.os.Handler.handleCallback(Handler.java:739) 
                        at android.os.Handler.dispatchMessage(Handler.java:95) 
                        at android.os.Looper.loop(Looper.java:145) 
                        at android.app.ActivityThread.main(ActivityThread.java:6837) 
                        at java.lang.reflect.Method.invoke(Native Method) 
                        at java.lang.reflect.Method.invoke(Method.java:372) 
                        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1404) 
                        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199) 

Answer 1

希望这有助于

检查这个答案https://stackoverflow.com/a/13004720/2826147，它与例子很好的解释以及读取评论太。

TextView有一个方法setCustomSelectionActionModeCallback()它应该用来代替startActionMode()。使用此功能可以自定义TextView用于文本选择的菜单。

示例代码：

bodyView.setCustomSelectionActionModeCallback(new StyleCallback()); 

如果你没有足够的空间比你可以删除任何预填充的菜单项，然后添加自己的。

public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 
     Log.e("", String.format("onActionItemClicked item=%s/%d", item.toString(), item.getItemId())); 
     CharacterStyle cs; 
     TextView bodyView = null; 
     int start = bodyView.getSelectionStart(); 
     int end = bodyView.getSelectionEnd(); 
     SpannableStringBuilder ssb = new SpannableStringBuilder(bodyView.getText()); 

     /*Toast.makeText(getActivity(), (String)data.result, 
       Toast.LENGTH_LONG).show();*/ 

     Toast.makeText(this, " toast shown ", Toast.LENGTH_LONG).show(); 


     switch (item.getItemId()) { 

      case R.id.bold: 
       cs = new StyleSpan(Typeface.BOLD); 
       ssb.setSpan(cs, start, end, 1); 
       bodyView.setText(ssb); 
       return true; 

      case R.id.italic: 
       cs = new StyleSpan(Typeface.ITALIC); 
       ssb.setSpan(cs, start, end, 1); 
       bodyView.setText(ssb); 
       return true; 

      case R.id.underline: 
       cs = new UnderlineSpan(); 
       ssb.setSpan(cs, start, end, 1); 
       bodyView.setText(ssb); 
       return true; 
     } 
     return false; 
    }