Question

我正在尝试开发Android应用;我需要检查是否比现有的更高版本 - 从Play商店 - ？

我试着写这段代码：

try {
    URL updateURL = new URL("https://play.google.com/store/apps/details?id=com.XXXX.YYYY");                
    URLConnection conn = updateURL.openConnection();
    InputStream is = conn.getInputStream();
    BufferedInputStream bis = new BufferedInputStream(is);
    ByteArrayBuffer baf = new ByteArrayBuffer(50);

    int current = 0;
    while((current = bis.read()) != -1){
        baf.append((byte)current);
    }

    /* Convert the Bytes read to a String. */
    final String s = new String(baf.toByteArray());         

    /* Get current Version Number */
    int curVersion = getPackageManager().getPackageInfo("com.XXXX.YYYY", 0).versionCode;
    int newVersion = Integer.valueOf(s);

    /* Is a higher version than the current already out? */
    if (newVersion > curVersion) {
        /* Post a Handler for the UI to pick up and open the Dialog */
        Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("market://search?q=pname:com.XXXX.YYYY"));
        startActivity(intent);
    }                
} catch (Exception e) {
    Toast.makeText(getApplicationContext(), e.getStackTrace().toString(), Toast.LENGTH_LONG).show();    
}

但此代码中的错误是：

java.net.UnknownHostException: Unable to resolve host "play.google.com": No address associated with hostname
Unable to resolve host "play.google.com": No address associated with hostname

Answer 1

您的网络连接似乎存在问题。另外，请确保已在AndroidManifest.xml

中声明了互联网访问权限

<uses-permission android:name="android.permission.INTERNET" />

上面显示的代码令人困惑。你怎么能以这种方式获得版本号？这个请求

URL updateURL = new URL("https://play.google.com/store/apps/details?id=com.XXXX.YYYY");

将在Google Play中返回您应用的HTML内容。如果没有进一步处理，您将无法获得该版本。

Answer 2

doc.getElementsByAttributeValue
                        ("itemprop", "softwareVersion").first().text();

softwareVersion不可用，请尝试以下代码

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

            @Override
            protected String doInBackground(Void... voids) {
                String newVersion = null;
                try {
                    Connection connection = Jsoup.connect(Config.APP_UPDATE_URL + "&hl=en");
                    Document document = connection.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();

                    Elements versions = document.getElementsByClass("htlgb");

                    for (int i = 0; i < versions.size(); i++) {
                        newVersion = versions.get(i).text();
                        if (Pattern.matches("^[0-9]{1}.[0-9]{1}.[0-9]{1}$", newVersion)) {
                            break;
                        }
                    }

                } catch (Exception e) {
                    return newVersion;
                }
                return newVersion;
            }

            @Override
            protected void onPostExecute(String onlineVersion) {
                super.onPostExecute(onlineVersion);
                if (onlineVersion != null && !onlineVersion.isEmpty()) {
                    if (!onlineVersion.equalsIgnoreCase(currentVersionName)) {
                        startActivity(new Intent(SplashActivity.this, UpdateVersionActivity.class));
                        finish();
                    } else {
                        callPermission();
                    }
                } else {
                    callPermission();
                }
            }
        }

从Play商店获取当前应用版本

2 个答案: