检测手机用户安装的应用程序是否有使用某权限

    public void getInstalledApps(){
        try {
            /*列出当前设备的所有安装程序*/
            List<ApplicationInfo> appInfos = getPackageManager().getInstalledApplications(0);
            for(ApplicationInfo appInfo : appInfos){
                boolean flag = false;
                //检测是否为用户安装的应用程序
                if ((appInfo.flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP) != 0) {
                    flag = true;
                } else if ((appInfo.flags & ApplicationInfo.FLAG_SYSTEM) == 0) {
                    flag = true;
                }
//如果为用户安装的应用程序则检测是否有android.permission.SEND_SMS
                if(flag && appInfo.enabled){
                    //检测是否有发送短信权限
                    String permName = "android.permission.SEND_SMS";
                    String pkgName = appInfo.packageName;
                    //结果为0则表示使用了该权限，-1则表求没有使用该权限
                    int reslut = getPackageManager().checkPermission(permName, pkgName);
                    if(reslut == PackageManager.PERMISSION_GRANTED){
                        Log.d("debug", "ApplicationInfo: "+pkgName+"  有使用权限： "+permName);
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }