Android判读是否安装了某一款ＡＰＰ

    /**

    * @Title: isAvilible 

    * @Description: 断手机已安装某程序

    * @param @param context

    * @param @param packageName

    * @param @return    

    * @return boolean    

    * @throws

     */

    public static boolean isAviliblePackage(Context context, String packageName){ 

        final PackageManager packageManager = context.getPackageManager();//获取packagemanager 

        List<PackageInfo> pinfo = packageManager.getInstalledPackages(0);//获取所有已安装程序的包信息 

        List<String> pName = new ArrayList<String>();//用于存储所有已安装程序的包名 

       //从pinfo中将包名字逐一取出，压入pName list中 

        if(pinfo != null){ 

            for(int i = 0; i < pinfo.size(); i++){ 

                String pn = pinfo.get(i).packageName; 

                pName.add(pn); 

            } 

        } 

        return pName.contains(packageName);//判断pName中是否有目标程序的包名，有TRUE，没有FALSE 

  }