Android应用内版本检查

Question

当我的应用程序打开时，我想在google play上查看应用程序版本。如果应用程序的版本高于安装的应用程序，我想通知用户更新应用程序。我在这里发现了“android query”jar，在这里我无法动态检查版本，我想设置主要版本、次要版本或修订版本。谁能帮帮我怎么办？

提前谢谢

Answer 1

在@Mohammad answer中为当前播放页面添加了一个小小的修改，这对我很有用。

 @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;
    }

***这不是一个通用的答案，因为它可能会随着播放页面的改变而改变*

Answer 2

如果你不想使用像Jsoup这样的库，你可以使用这样的东西从Google Play获取当前的版本号：

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();
    }
}

如果你保持“

Answer 3

基本上，你应该检查市场上应用程序的最新版本和设备上应用程序的版本，并确定是否有可用的更新。为此，请尝试以下方法：

您应该使用此选项获取当前版本（设备上应用的版本）：

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;
    }

并使用此功能在Google play中获取最新版本（摘自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，当你的应用程序启动时，像这样相互检查：

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();
        }

并显示用户更新对话框。但请确保您已经导入了j汤库。

额外：对于导入j汤库，请按照以下步骤操作：

1-进入文件菜单
2-项目结构
3-左侧点击应用程序
4-选择依赖项选项卡
5-点击
6-点击库依赖项
7-搜索“jsoup”
8-选择组织。jsoup:jsoup并单击ok