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Android:以编程方式安装.apk

我需要更新我的Android应用程序.在程序内部,我下载了新版本.如何通过下载(以编程方式)下载新版本来替换当前版本？

URL url = new URL("http://www.mySite.com/myFolder/myApp.apk");
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
try 
{
    FileOutputStream fos = this.getApplicationContext().openFileOutput("myApp.apk", Context.MODE_WORLD_READABLE|Context.MODE_WORLD_WRITEABLE);

    InputStream in = new BufferedInputStream(urlConnection.getInputStream());
    BufferedReader br = new BufferedReader(new InputStreamReader(in, "UTF-8"));

    StringBuilder  sb = new StringBuilder();

    byte[] buffer = new byte[8192];
    int len;
    while ((len = in.read(buffer)) != -1) 
    {
       // EDIT - only write the bytes that have been written to
       // the buffer, not the whole buffer
       fos.write(buffer, 0, len);  //  file to save app
    }
    fos.close(); …

我正在开发一个作为设备所有者运行的应用程序,我想在其中构建一个自动更新程序.

为此,我使用PackageInstaller,因为我拥有使用它的权限,因为我的设备所有者位置.

private void installPackage(InputStream inputStream)
        throws IOException {
    notifyLog("Inizio aggiornamento...");
    PackageInstaller packageInstaller = context.getPackageManager().getPackageInstaller();
    int sessionId = packageInstaller.createSession(new PackageInstaller
            .SessionParams(PackageInstaller.SessionParams.MODE_FULL_INSTALL));
    PackageInstaller.Session session = packageInstaller.openSession(sessionId);

    long sizeBytes = 0;

    OutputStream out = null;
    out = session.openWrite("my_app_session", 0, sizeBytes);

    int total = 0;
    byte[] buffer = new byte[65536];
    int c;
    while ((c = inputStream.read(buffer)) != -1) {
        total += c;
        out.write(buffer, 0, c);
    }
    session.fsync(out);
    inputStream.close();
    out.close();

    session.commit(createIntentSender(sessionId));
}

private IntentSender createIntentSender(int sessionId) {
    PendingIntent pendingIntent = PendingIntent.getBroadcast(
            context,
            sessionId,
            new …