我正在使用以下程序下载并安装 apk。安装成功后如何从sdcard中删除apk？我尝试的是：
File file = new File("/sdcard/filename.apk");
boolean deleted = file.delete();
但它会在安装前删除该文件。
protected Boolean doInBackground(String... arg0) {
try {
URL url = new URL( weburl +"username="+usename+"&password="+usepass +"&apk="+apk);
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.setDoOutput(true);
urlConnection.connect();
File sdcard = Environment.getExternalStorageDirectory();
File file = new File(sdcard, "filename.apk");
FileOutputStream fileOutput = new FileOutputStream(file);
InputStream inputStream = urlConnection.getInputStream();
byte[] buffer = new byte[1024];
int bufferLength = 0;
while ( (bufferLength = inputStream.read(buffer)) > 0 ) {
fileOutput.write(buffer, 0, bufferLength);
}
fileOutput.close();
// this.checkUnknownSourceEnability();
// this.initiateInstallation();
Intent intent = new Intent(Intent.ACTION_VIEW);
Uri uri = Uri.fromFile(new File("/sdcard/filename.apk"));
intent.setDataAndType(uri, "application/vnd.android.package-archive");
startActivity(intent);
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
private void installApk(){
Intent intent = new Intent(Intent.ACTION_VIEW);
Uri uri = Uri.fromFile(new File("/sdcard/filename.apk"));
intent.setDataAndType(uri, "application/vnd.android.package-archive");
startActivity(intent);
}