關於dialog對話框中按鍵的點擊事件選擇

如果在dialog對話框中添加一個按鈕，那么它對應的點擊事件應該回調View.OnClickListener()方法呢還是DialogInterface.OnClickListener()方法呢？

/* 創建對話框 */
public void showdialog(String title, String message){
    AlertDialog.Builder builder = new Builder(this);
    builder.setIcon(R.drawable.ic_launcher);
    builder.setTitle(title);
    builder.setMessage(message);
    builder.setPositiveButton("確定", new DialogInterface.OnClickListener() {
            
            @Override
            public void onClick(DialogInterface dialog, int which) {
                
                
            }
        });
        builder.create().show();        
                
}

其實答案很簡單，看下setPositiveButton的關聯代碼：

        /**
         * Set a listener to be invoked when the positive button of the dialog is pressed.
         * @param text The text to display in the positive button
         * @param listener The {@link DialogInterface.OnClickListener} to use.
         *
         * @return This Builder object to allow for chaining of calls to set methods
         */
        public Builder setPositiveButton(CharSequence text, final OnClickListener listener) {
            P.mPositiveButtonText = text;
            P.mPositiveButtonListener = listener;
            return this;
        }

O(∩_∩)O代碼中已經標注的很清楚了，這里的第二個param應該使用DialogInterface.OnClickListener，而針對View.OnClickListener和DialogInterface.OnClickListener的區別，來看看關聯代碼：

DialogInterface.OnClickListener

    /**
     * Interface used to allow the creator of a dialog to run some code when an
     * item on the dialog is clicked..
     */
    interface OnClickListener {
        /**
         * This method will be invoked when a button in the dialog is clicked.
         * 
         * @param dialog The dialog that received the click.
         * @param which The button that was clicked (e.g.
         *            {@link DialogInterface#BUTTON1}) or the position
         *            of the item clicked.
         */
        /* TODO: Change to use BUTTON_POSITIVE after API council */
        public void onClick(DialogInterface dialog, int which);
    }

 

View.OnClickListener

    /**
     * Interface definition for a callback to be invoked when a view is clicked.
     */
    public interface OnClickListener {
        /**
         * Called when a view has been clicked.
         *
         * @param v The view that was clicked.
         */
        void onClick(View v);
    }

喏，寫的很清楚了，一個是dialog中的button被clicked了調用，一個是View被clicked了回調。

理解這么多，后期再補充............