获取手机安装的所有程序

1.获取包管理器对象
PackageManager  pm = context.getPackageManager();
2.得到所有安装的程序包名
  List<PackageInfo> infos = pm.getInstallPackages(PackageManager.GET_UNINSTALLED_PACKAGES);
3.然后遍历这个集合
  for( PackageInfo  packInfo : infos){
     Drawable  icon  =  packInfo.applicationInfo.loadIcon(pm);  //获取应用图标
    String appName =   packInfo.applicationInfo.loadLabel(pm).toString(); //获取应用名字
    ApplicationInfo info  =  packInfo.applicationInfo;
   }
判断是三方应用还是系统应用的方法
public boolean filterApp(ApplicationInfo info) {
        if ((info.flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP) != 0) {
            return true;
        } else if ((info.flags & ApplicationInfo.FLAG_SYSTEM) == 0) {
            return true;
        }
        return false;
    }