如何允许用户从应用程序内部检查最新的应用程序版本？ [英] How to allow users to check for the latest app version from inside the app?

问题描述

我想在应用中添加检查更新按钮，以便当有人点击它时，它会显示一个Toast消息/进度对话框，用于检查应用的版本。

I want to add a "Check for update" button in apps so that when someone clicks it, it will display a toast message / progress dialog for checking the app's version.

如果找到新版本，应用程序会自动将其下载到手机上，让用户手动安装更新的应用程序。

If new version is found the apps will auto download it to the phone and let user to manually install the updated apps.

或其他任何方法都可以，只要它可以检查最新版本并通知用户更新。

Or any others method will do as long as it can check for latest version and notify the user to update.

推荐答案

Google在两个月前更新了Play商店。
这是我现在正在使用的解决方案..

Google updated play store two months before. This is the solution working right now for me..

class GetVersionCode extends AsyncTask<Void, String, String> {

    @Override

    protected String doInBackground(Void... voids) {

        String newVersion = null;

        try {
            Document document = Jsoup.connect("https://play.google.com/store/apps/details?id=" + MainActivity.this.getPackageName()  + "&hl=en")
                    .timeout(30000)
                    .userAgent("Mozilla/5.0 (Windows; U; WindowsNT 5.1; en-US; rv1.8.1.6) Gecko/20070725 Firefox/2.0.0.6")
                    .referrer("http://www.google.com")
                    .get();
            if (document != null) {
                Elements element = document.getElementsContainingOwnText("Current Version");
                for (Element ele : element) {
                    if (ele.siblingElements() != null) {
                        Elements sibElemets = ele.siblingElements();
                        for (Element sibElemet : sibElemets) {
                            newVersion = sibElemet.text();
                        }
                    }
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return newVersion;

    }


    @Override

    protected void onPostExecute(String onlineVersion) {

        super.onPostExecute(onlineVersion);

        if (onlineVersion != null && !onlineVersion.isEmpty()) {

            if (Float.valueOf(currentVersion) < Float.valueOf(onlineVersion)) {
                //show anything
            }

        }

        Log.d("update", "Current version " + currentVersion + "playstore version " + onlineVersion);

    }
}

并且不要忘记添加JSoup库

and don't forget to add JSoup library

dependencies {
compile 'org.jsoup:jsoup:1.8.3'}

和Oncreate（）

and on Oncreate()

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);


    String currentVersion;
    try {
        currentVersion = getPackageManager().getPackageInfo(getPackageName(), 0).versionName;
    } catch (PackageManager.NameNotFoundException e) {
        e.printStackTrace();
    }

    new GetVersionCode().execute();

}

就是这样..
感谢此链接

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