メソッドをJava 8ラムダに変換

Question

Java 8 lambda/stream（）を使用して、より直感的な方法で関数型プログラミングでこのメソッドを書く方法は？

int animation = R.style.DialogAnimationSlideHorizontal; 
String body; 
String subject = mSubjectView.getText().toString(); 
BaseDialog dialog = dialogFactory.getType(DialogTypes.DIALOG_FULL); 

if (!checkFields()) { 
    // one of the recipients is invalid. 
    body = getString(R.string.bad_address); 
    dialog.showDialog(body, animation, new DialogBuilder.Positive() { 
     @Override 
     public void handleClick(DialogInterface dialogInterface, View view) { 
      // do nothing 
     } 
    }); 
} else if (Helpers.isEmpty(subject)) { 
     // Yup, empty... send the message without a subject? 
     body = getString(R.string.empty_subject_compose); 
     dialog.showDialog(body, animation, new DialogBuilder.Positive() { 
      @Override 
      public void handleClick(DialogInterface dialogInterface, View view) { 
       // user accepted to send anyway. 
       mWebView.getComposeContent(); 
      } 
     }); 
} else { 
    // everything is correct! send the message. 
    mWebView.getComposeContent(); 
} 

Answer 1

new DialogBuilder.Positive() { 
    @Override 
    public void handleClick(DialogInterface dialogInterface, View view) { 
     ... 
    } 
} 

       | 
       V 

(dialogInterface, view) -> { /*do nothing*/ } 
(dialogInterface, view) -> { mWebView.getComposeContent(); } 

のようなラムダを持つすべての匿名クラスを交換し、私はここでどのように適用できるか、ストリームAPIは表示されません。