/*** 判断手机是否安装某个应用** @param appPackageName 应用包名* @return true：安装，false：未安装*/public static boolean installed(String appPackageName) {PackageManager packageManager = KeyWord.context.getPackageManager();// 获取packagemanagerList<PackageInfo> pinfo = packageManager.getInstalledPackages(0);// 获取所有已安装程序的包信息for (PackageInfo pkif : pinfo) {String pn = pkif.packageName;if (appPackageName.equals(pn)) {return true;}}return false;}