系统对话框创建

创建对话框代码：

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();
    }

所遇到的问题就是点击屏幕空白部分dialog不消失，解决办法如下：
在dialog.show()之前调dialog.setCanceledOnTouchOutside(true);