Не удается получить выделенный текст из webview

Question

Я пытаюсь получить выделенный текст из webview с помощью кода ниже, но это возвращает null.please, позвольте мне теперь, где проблема в нижеприведенном коде.

в этом коде index.html является html-файлом внутри моей папки sdcard/dheeraj/index.html.

 import android.app.Activity; 
     import android.content.res.AssetManager; 
     import android.os.Bundle; 
     import android.os.Environment; 
     import android.content.ClipboardManager; 
     import android.util.Log; 
     import android.view.ActionMode; 

     import android.view.KeyEvent; 
     import android.view.Menu; 
     import android.view.MenuItem; 
     import android.webkit.WebSettings; 
     import android.webkit.WebView; 
     import android.widget.Toast; 


    public class AddToNotesWithWebViewActivity extends Activity 
    { 

     AssetManager assetManager; 
     WebView webview; 
     String line, line1 = "", finalstr = ""; 
     int i = 0; 
     private ActionMode mActionMode = null; 
     private ClipboardManager clipboard; 
     boolean mark_text=false; 

     @Override 
     public void onActionModeStarted(ActionMode mode) { 
      if (mActionMode == null) { 
       mActionMode = mode; 
       Menu menu = mode.getMenu(); 
       // Remove the default menu items (select all, copy, paste, search) 
       menu.clear(); 

       mode.getMenuInflater().inflate(R.menu.add_to_notes_menu, menu); 
      } 

      super.onActionModeStarted(mode); 
     } 


     public void onContextualMenuItemClicked(MenuItem item) 
     { 
      switch (item.getItemId()) 
      { 
       case R.id.add_to_notes_menu_item: 

        clipboard = 
          (ClipboardManager) getSystemService(CLIPBOARD_SERVICE); 
        emulateShiftHeld(webview); 
        selectedText(); 




        break; 

       default: 

        break; 
      } 

      // This will likely always be true, but check it anyway, just in case 
      if (mActionMode != null) { 
       mActionMode.finish(); 
      } 
     } 

     private void selectedText() 
     { 
      Toast.makeText(this, clipboard.getText(), 
        Toast.LENGTH_SHORT).show(); 
     } 


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


     @Override 
     protected void onCreate(Bundle savedInstanceState) 
     { 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.ac_add_to_notes_web_view); 
      webview=(WebView)findViewById(R.id.web_view_browser); 



      WebSettings webSettings = webview.getSettings(); 
      webSettings.setJavaScriptEnabled(true); 

      webview.loadUrl("file://" + Environment.getExternalStorageDirectory() + "/dheeraj/index.html"); 

     } 

     private void emulateShiftHeld(WebView view) 
     { 

     try 
      { 
       KeyEvent shiftPressEvent = new KeyEvent(0, 0, KeyEvent.ACTION_DOWN, 
         KeyEvent.KEYCODE_SHIFT_LEFT, 0, 0); 
       shiftPressEvent.dispatch(view); 

       registerForContextMenu(view); 

      } 
      catch (Exception e) 
      { 
       Log.e("dd", "Exception in emulateShiftHeld()", e); 
      } 
     } 

    } 

Пожалуйста, помогите .... ?????????

Answer 1

Вы можете обратиться следующий код:

package com.Demo.SelectText; 

    import android.app.Activity; 
    import android.os.Bundle; 
    import android.view.KeyEvent; 
    import android.view.Menu; 
    import android.view.MenuItem; 
    import android.webkit.WebView; 

    public class MainActivity extends Activity { 
    WebView mWebView; 

     /** Called when the activity is first created. */ 
     @Override 
     public void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.main); 
      mWebView = (WebView)findViewById(R.id.webview); 
      mWebView.loadUrl("http://devemat-androidprogramming.blogspot.com/"); 

     } 

     private static final int SELECTTEXT_MENU_ID = Menu.FIRST; 

     @Override 
     public boolean onCreateOptionsMenu(Menu menu){ 
     super.onCreateOptionsMenu(menu); 

     menu.add(0, SELECTTEXT_MENU_ID, 0, "Select Text"); 

     return true; 
     } 

     public boolean onPrepareOptionsMenu(Menu menu){ 
     super.onPrepareOptionsMenu(menu); 
     return true; 
     } 

     public boolean onOptionsItemSelected(MenuItem item){ 
     switch(item.getItemId()){ 
     case SELECTTEXT_MENU_ID: 
       SelectText(); 
       return true; 
     } 
     return true; 
     } 

     public void SelectText(){ 
     try{ 
      KeyEvent shiftPressEvent = 
        new KeyEvent(0, 0, KeyEvent.ACTION_DOWN,  
        KeyEvent.KEYCODE_SHIFT_LEFT, 0, 0); 
      shiftPressEvent.dispatch(mWebView); 
     }catch(Exception e){ 
      throw new AssertionError(e); 
     } 
    } 
    } 

Answer 2

 public void getMyText(String myText) { 
      // this is called from JS 
      System.out.println(myText); 
     } 

    } 

    private class myWebViewClient extends WebViewClient { 
      <at> Override 
      public boolean shouldOverrideUrlLoading(WebView view, String url) { 
      view.loadUrl(url); 
      return true; 
      } 


     Override 
     public void onPageFinished(WebView view, String url) { 
      view.loadUrl("javascript:window.cpjs.getMyText(document.getElementById('myText').innerHTML);void(0);"); 

     } 
    }