判断安装某个应用



/** 是否安装某个应用* */public static boolean isAvilible(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}