Android应用程序自我更新[重复]

Question

可能重复：
Android: install .apk programmatically

我需要更新我的安卓应用程序。在程序内部，我下载了新版本。如何用下载的新版本（以编程方式）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();

    ....     here I have the file of new app, now I need use it

Answer 1

如果更新后的 apk 具有相同的包名称并使用相同的密钥进行签名，您可以发送一个调用默认 android 安装程序的意图。已安装的 apk 将被覆盖。

Intent intent = new Intent(Intent.ACTION_VIEW);
Uri uri = Uri.fromFile(new File(pathToApk));
intent.setDataAndType(uri, "application/vnd.android.package-archive");
startActivity(intent);