android - 更新 Android 应用(无需访问 Google Play 商店)

Question

我编写了该应用程序的 Beta 版。它将可以通过网络下载(我不会将其发布到 Play 市场)。当新版本发布时，是否可以在不访问 Play Market 的情况下更新此应用程序？

Answer 1

当然。但是，您需要构建一种机制，让您的应用程序调用服务器，找出是否有更新版本的应用程序，如果有，将其拉下并安装。一旦您确定确实需要拉下更新，您可以使用类似于此 AsyncTask 的内容来执行此操作:

protected String doInBackground(String... sUrl) {
    String path = "/sdcard/YourApp.apk";
    try {
        URL url = new URL(sUrl[0]);
        URLConnection connection = url.openConnection();
        connection.connect();

        int fileLength = connection.getContentLength();

        // download the file
        InputStream input = new BufferedInputStream(url.openStream());
        OutputStream output = new FileOutputStream(path);

        byte data[] = new byte[1024];
        long total = 0;
        int count;
        while ((count = input.read(data)) != -1) {
            total += count;
            publishProgress((int) (total * 100 / fileLength));
            output.write(data, 0, count);
        }

        output.flush();
        output.close();
        input.close();
    } catch (Exception e) {
        Log.e("YourApp", "Well that didn't work out so well...");
        Log.e("YourApp", e.getMessage());
    }
    return path;
}

// begin the installation by opening the resulting file
@Override
protected void onPostExecute(String path) {
    Intent i = new Intent();
    i.setAction(Intent.ACTION_VIEW);
    i.setDataAndType(Uri.fromFile(new File(path)), "application/vnd.android.package-archive" );
    Log.d("Lofting", "About to install new .apk");
    this.context.startActivity(i);
}