建立對話方塊程式碼：

protected void dialogOut() {
        AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
        builder.setMessage(mContext.getString(R.string.out));
        builder.setTitle(mContext.getString(R.string.notice));
        builder.setPositiveButton(mContext.getString(R.string
 
.yes), new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                ContactsManager.memberQuit(new MemberQuitRequest(Long.parseLong(mUserId),
                        Long.parseLong(mGroupId)));
                dialog.dismiss
 
();
            }
        });
        builder.setNegativeButton(mContext.getString(R.string.no), new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
            }
        });
        builder.create
 
().show();
    }

所遇到的問題就是點選螢幕空白部分dialog不消失，解決辦法如下：
在dialog.show()之前調dialog.setCanceledOnTouchOutside(true);