获取Android应用版本信息

public VersionInfo getVersion() {PackageManager pm = context.getPackageManager();VersionInfo vInfo = new VersionInfo();try {PackageInfo info = pm.getPackageInfo(context.getPackageName(), 0);vInfo.setVersionCode(info.versionCode);vInfo.setVersionName(info.versionName);pm.getApplicationLabel(context.getApplicationInfo());} catch (NameNotFoundException e) {e.printStackTrace();}return vInfo;}

 

 

使用一下方法，可以获取系统已安装了的应用包：

List < PackageInfo > packs = getPackageManager().getInstalledPackages(0);