APP 调起 qq聊天界面的代码

/**
     * @param qq qq号码
     */
    public void openQQ(String qq) {
        try {
            String url = "mqqwpa://im/chat?chat_type=wpa&uin=" + qq;
            startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
        } catch (Exception e) {
            Toast.makeText(this, "尚未安装QQ", Toast.LENGTH_SHORT).show();
        }
    }