Android實現QQ跳轉到臨時聊天界面

直接跳轉到某個QQ聊天界面，可是不是發送消息

if (checkApkExist(this, "com.tencent.mobileqq")){  
      startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("mqqwpa://im/chat?chat_type=wpa&uin="+qqNum+"&version=1")));  
}else{  
      Toast.makeText(this,"本機未安裝QQ應用",Toast.LENGTH_SHORT).show();  
}

　　

檢測手機是否安裝QQ：

    public boolean checkApkExist(Context context, String packageName) {  
        if (packageName == null || "".equals(packageName))  
        return false;  
        try {  
            ApplicationInfo info = context.getPackageManager().getApplicationInfo(packageName,  
                    PackageManager.GET_UNINSTALLED_PACKAGES);  
            return true;  
        } catch (PackageManager.NameNotFoundException e) {  
            return false;  
        }  
    }