BUU-[极客大挑战 2019]Http

1、相关代码

 List<ApplicationInfo> installedApps = getPackageManager().getInstalledApplications(0);
        for (ApplicationInfo appInfo : installedApps) {
            CharSequence getAppName = getPackageManager().getApplicationLabel(appInfo);
            String appName=getAppName.toString();//获取到app名
            String packageName=appInfo.packageName;
            String versionName=getVersionName(this,packageName);//一般这个就是版本号--1.2.11
            Log.d(">>>appInfo ","appName="+appName+",,,,,,,packageName="+packageName+",,,,,,,,,versionCode="+versionCode+",,,,,,,,,,versionName="+versionName);
            if (packageName.equals("com.mywl.heiangnscxb")){
                // 应用程序已安装
                break;
            }
        }


  public  int getVersionCode(Context context,String packageName) {
        PackageManager manager = context.getPackageManager();
        int code = 0;
        try {
            PackageInfo info = manager.getPackageInfo(packageName, 0);
            code = info.versionCode;
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }
        return code;
    }


    public  String getVersionName(Context context,String packageName) {
        PackageManager manager = context.getPackageManager();
        String name = null;
        try {
            PackageInfo info = manager.getPackageInfo(packageName, 0);
            name = info.versionName;
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }

        return name;
    }

2、相关权限

加上权限才能获取到所有的应用

<uses-permission
    android:name="android.permission.QUERY_ALL_PACKAGES"
    tools:ignore="QueryAllPackagesPermission" />