Android应用程序自我更新 [英] Android application self-update

问题描述

可能重复:
Android:以编程方式安装.apk

Possible Duplicate:
Android: install .apk programmatically

我需要更新我的android应用程序.在程序内部，我下载了新版本.如何用已下载的新版本(以编程方式)替换当前版本?

I need to update my android application. Internally the program, I download the new version. How can I replace the current version by that new was downloaded (programmatically)?

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

推荐答案

如果更新的apk具有相同的程序包名称，并且使用相同的密钥签名，则您可以发送一个意图，该意图将调用默认的android安装程序.安装的apk将被覆盖.

If the updated apk has the same package name and is signed with the same key you can just send a intent which will call a default android installer. The installed apk will be overriden.

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

这篇关于Android应用程序自我更新的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！