[Android程式範例] 判斷某個套件package是否已安裝

  final PackageManager packageManager = getPackageManager();
  List mPackageInfo = packageManager.getInstalledPackages(0);
  for (int i = 0; i < mPackageInfo.size(); i++)
  {
   //獲取到AP包名  
   if (mPackageInfo.get(i).packageName.equals("com.google.android.apps.plus"))
   {
    isInstalling = true;
    break;
   }
  }