检测手机是否安装某个应用

/**
     * 检测手机是否安装某个应用
     *
     * @param context
     * @param appPackageName 应用包名
     * @return true-安装，false-未安装
     */
    public static boolean isAppInstall(Context context, String appPackageName) {
        PackageManager packageManager = context.getPackageManager();
        List<PackageInfo> pinfo = packageManager.getInstalledPackages(0);
        if (pinfo != null) {
            for (int i = 0; i < pinfo.size(); i++) {
                String pn = pinfo.get(i).packageName;
                if (appPackageName.equals(pn)) {
                    return true;
                }
            }
        }
        return false;
    }