Question

我想在我的应用程序打开时检查Google Play上的应用程序版本。如果App的版本高于已安装的应用程序，我想通知用户更新应用程序。我发现来自here的“android-query”jar，在此我无法动态检查版本，我想设置Major，Minor或Revision。有人请帮帮我，我该怎么办？

提前致谢

Answer 1

基本上，您应该检查市场中应用的最新版本以及设备上的应用版本，并确定是否有可用的更新。为此，请尝试：

您应该使用它来获取当前版本（设备上的应用程序版本）：

private String getCurrentVersion(){
PackageManager pm = this.getPackageManager();
PackageInfo pInfo = null;

        try {
            pInfo =  pm.getPackageInfo(this.getPackageName(),0);

        } catch (PackageManager.NameNotFoundException e1) {
            e1.printStackTrace();
        }
        String currentVersion = pInfo.versionName;

        return currentVersion;
    }

并使用此功能获取Google Play中的最新版本（取自https://stackoverflow.com/a/32942785/444991）：

private class GetLatestVersion extends AsyncTask<String, String, String> {
String latestVersion;

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
    }

    @Override
    protected String doInBackground(String... params) {
        try {
            //It retrieves the latest version by scraping the content of current version from play store at runtime
            String urlOfAppFromPlayStore = "https://play.google.com/store/apps/details?id= your app package address";
            Document  doc = Jsoup.connect(urlOfAppFromPlayStore).get();
            latestVersion = doc.getElementsByAttributeValue("itemprop","softwareVersion").first().text();

        }catch (Exception e){
            e.printStackTrace();

        }

        return latestVersion;
    }
}

然后，当您的应用启动时，请按照以下方式对彼此进行检查：

String latestVersion = "";
        String currentVersion = getCurrentVersion();
        Log.d(LOG_TAG, "Current version = " + currentVersion);
        try {
            latestVersion = new GetLatestVersion().execute().get();
            Log.d(LOG_TAG, "Latest version = " + latestVersion);
        } catch (InterruptedException e) {
            e.printStackTrace();
        } catch (ExecutionException e) {
            e.printStackTrace();
        }

        //If the versions are not the same
        if(!currentVersion.equals(latestVersion)){
            final AlertDialog.Builder builder = new AlertDialog.Builder(this);
            builder.setTitle("An Update is Available");
            builder.setPositiveButton("Update", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    //Click button action
                    startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=your app package address")));
                    dialog.dismiss();
                }
            });

            builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    //Cancel button action
                }
            });

            builder.setCancelable(false);
            builder.show();
        }

显示用户更新对话框。但请确保您已导入jsoup库。

额外：要导入jsoup库，请按照下列步骤操作：

1-转到文件菜单
2-项目结构
3-左侧点击应用程序
4-选择依赖项选项卡
5-单击+
6-点击图书馆依赖关系
7-搜索＆＃34; jsoup＆＃34;
8-选择org.jsoup：jsoup并点击确定

Answer 2

如果您不想使用像Jsoup这样的库，可以使用类似的方法从Google Play获取当前版本号：

import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.MalformedURLException;
import java.net.URL;

public class StackAppVersion {

    public static void main(String[] args) {
        try {
            System.out.println(currentVersion());
        } catch (IOException ex) {
            System.out.println("Failed to read Google Play page!");
        }
    }

    private static String currentVersion() throws IOException {
        StringBuilder sb = new StringBuilder();

        try (Reader reader = new InputStreamReader(
                new URL("https://play.google.com/store/apps/details?id=com.stackexchange.marvin&hl=en")
                        .openConnection()
                        .getInputStream()
                , "UTF-8"
        )) {
            while (true) {
                int ch = reader.read();
                if (ch < 0) {
                    break;
                }
                sb.append((char) ch);
            }
        } catch (MalformedURLException ex) {
            // Can swallow this exception if your static URL tests OK.
        }

        String parts[] = sb.toString().split("softwareVersion");

        return parts[1].substring(
                parts[1].indexOf('>') + 1, parts[1].indexOf('<')
        ).trim();
    }
}

如果你保留＆＃34;＆amp; hl = en＆＃34;在URL中，UTF-8的字符编码应该没问题。

Answer 3

接受的答案不再有效。最近我不得不改变代码。

尝试以下方法：

Jsoup.connect("https://play.google.com/store/apps/details?id=APPPACKAGE&hl=en")
                .timeout(10000)
                .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()
                .select("div:contains(Current Version)").last().parent()
                .select("span").last()
                .ownText();

Answer 4

在@Mohammad回答中添加一点修改，对于当前的游戏页面，下面对我有效。

 @Override
    protected String doInBackground(String... params) {

        try {
            Document doc = Jsoup.connect("https://play.google.com/store/apps/details?id=YOUR_PACKAGE_NAME").get();
            Element element = doc.getElementsByClass("BgcNfc").get(3);
            latestVersion = element.parent().children().get(1).children().text();
        } catch (Exception e) {
            latestVersion = currentVersion;
        }

        return latestVersion;
    }

***这不是一般答案，因为它可能会随播放页面的变化而改变*

Answer 5

经过大量的在线搜索后，我设法找到了解决方案！所以对于那里寻找正确答案的其他人来说

protected String doInBackground（Void ... void）{

        StringBuilder sb = new StringBuilder();

        try (Reader reader = new InputStreamReader(
                new URL("https://play.google.com/store/apps/details?id="+BuildConfig.APPLICATION_ID+"&hl=en")
                        .openConnection()
                        .getInputStream()
                , "UTF-8"
        )) {
            while (true) {
                int ch = reader.read();
                if (ch < 0) {
                    break;
                }
                sb.append((char) ch);
            }
        } catch (MalformedURLException ex) {
            Log.d("ERROR", ex.getMessage());
            return null;
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
            Log.d("ERROR", e.getMessage());
            return null;
        } catch (IOException e) {
            e.printStackTrace();
            Log.d("ERROR", e.getMessage());
            return null;
        }

        String parts[] = sb.toString().split("Current Version");
        String res = parts[1].substring(
                parts[1].indexOf("htlgb") + 7, parts[1].indexOf("htlgb") + 11
        ).trim().toString();
        return res;

    }

Android应用内版本检查

5 个答案: