两种获取程序信息的方法

一。通过程序包名获取PackageInfo 信息

 Drawable icon = null;//图片
  String appName=null;//程序名称
  PackageManager manager = this.getPackageManager();
  try {
  PackageInfo info = manager.getPackageInfo(this.getPackageName(), 0);//this.getPackageName()这个是程序包名
  String packageName = info.packageName;
  int versionCode = info.versionCode;
  String versionName = info.versionName;
   appName=info.applicationInfo.loadLabel(getPackageManager()).toString();

  System.out.println("packageName="+packageName+"versionCode="+versionCode+"versionName="+versionName);
  icon=info.applicationInfo.loadIcon(getPackageManager());
  
  } catch (NameNotFoundException e) {
  // TODO Auto-generated catch block
  }
 

二。通过for循环，获取所有程序信息

List < PackageInfo > packs = getPackageManager().getInstalledPackages(0);
for(int i=0;i < packs.size();i++) {
PackageInfo p = packs.get(i);
PInfo newInfo = new PInfo();//new一个对象
newInfo.appname = p.applicationInfo.loadLabel(getPackageManager()).toString();
newInfo.pname = p.packageName;
newInfo.versionName = p.versionName;
newInfo.versionCode = p.versionCode;
newInfo.icon = p.applicationInfo.loadIcon(getPackageManager());
res.add(newInfo);
}
return res;
}