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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