我需要从 Android 应用程序（200 - 500 kb）发送一个文件。我已经尝试了选定的脚本，但这些都返回了错误。
private void doFileUpload(String filename) {
HttpURLConnection conn = null;
DataOutputStream dos = null;
DataInputStream inStream = null;
String existingFileName = filename;
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1*1024*1024;
String responseFromServer = "";
String urlString = "http://scary-story.ru/";
try {
//------------------ CLIENT REQUEST
FileInputStream fileInputStream = new FileInputStream(new File(existingFileName) );
// open a URL connection to the Servlet
URL url = new URL(urlString);
// Open a HTTP connection to the URL
conn = (HttpURLConnection) url.openConnection();
// Allow Inputs
conn.setDoInput(true);
// Allow Outputs
conn.setDoOutput(true);
// Don't use a cached copy.
conn.setUseCaches(false);
// Use a post method.
conn.setRequestMethod("POST");
conn.setRequestProperty("Connection", "Keep-Alive");
conn.setRequestProperty("Content-Type", "multipart/form-data;boundary="+boundary);
dos = new DataOutputStream( conn.getOutputStream() );
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"uploadedfile\";filename=\"" + existingFileName + "\"" + lineEnd);
dos.writeBytes(lineEnd);
// create a buffer of maximum size
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = new byte[bufferSize];
// read file and write it into form...
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
while (bytesRead > 0) {
dos.write(buffer, 0, bufferSize);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
}
// send multipart form data necesssary after file data...
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
// close streams
Log.e("Debug","File is written");
fileInputStream.close();
dos.flush();
dos.close();
}
catch (MalformedURLException ex) {
Log.e("Debug", "error: " + ex.getMessage(), ex);
}
catch (IOException ioe) {
Log.e("Debug", "error: " + ioe.getMessage(), ioe);
}
//------------------ read the SERVER RESPONSE
try {
inStream = new DataInputStream(conn.getInputStream());
String str;
while ((str = inStream.readLine()) != null) {
Log.e("Debug","Server Response "+str);
}
inStream.close();
}
catch (IOException ioex) {
Log.e("Debug", "error: " + ioex.getMessage(), ioex);
}
}
此脚本返回下一个错误并强制关闭应用程序。
01-28 16:54:20.729: E/AndroidRuntime(5647): FATAL EXCEPTION: main
01-28 16:54:20.729: E/AndroidRuntime(5647): android.os.NetworkOnMainThreadException
01-28 16:54:20.729: E/AndroidRuntime(5647): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1100)
01-28 16:54:20.729: E/AndroidRuntime(5647): at java.net.InetAddress.lookupHostByName(InetAddress.java:426)
01-28 16:54:20.729: E/AndroidRuntime(5647): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:277)
01-28 16:54:20.729: E/AndroidRuntime(5647): at java.net.InetAddress.getAllByName(InetAddress.java:251)
01-28 16:54:20.729: E/AndroidRuntime(5647): at libcore.net.http.HttpConnection.<init>(HttpConnection.java:71)
01-28 16:54:20.729: E/AndroidRuntime(5647): at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
01-28 16:54:20.729: E/AndroidRuntime(5647): at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:351)
01-28 16:54:20.729: E/AndroidRuntime(5647): at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:86)
01-28 16:54:20.729: E/AndroidRuntime(5647): at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
01-28 16:54:20.729: E/AndroidRuntime(5647): at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:308)
01-28 16:54:20.729: E/AndroidRuntime(5647): at libcore.net.http.HttpEngine.connect(HttpEngine.java:303)
01-28 16:54:20.729: E/AndroidRuntime(5647): at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:282)
01-28 16:54:20.729: E/AndroidRuntime(5647): at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:232)
01-28 16:54:20.729: E/AndroidRuntime(5647): at libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:80)
01-28 16:54:20.729: E/AndroidRuntime(5647): at libcore.net.http.HttpURLConnectionImpl.getOutputStream(HttpURLConnectionImpl.java:188)
01-28 16:54:20.729: E/AndroidRuntime(5647): at com.example.testapp1.MainActivity.doFileUpload(MainActivity.java:342)
01-28 16:54:20.729: E/AndroidRuntime(5647): at com.example.testapp1.MainActivity.stopRecording(MainActivity.java:186)
01-28 16:54:20.729: E/AndroidRuntime(5647): at com.example.testapp1.MainActivity.access$2(MainActivity.java:170)
01-28 16:54:20.729: E/AndroidRuntime(5647): at com.example.testapp1.MainActivity$1.onClick(MainActivity.java:302)
01-28 16:54:20.729: E/AndroidRuntime(5647): at android.view.View.performClick(View.java:3524)
01-28 16:54:20.729: E/AndroidRuntime(5647): at android.view.View$PerformClick.run(View.java:14226)
01-28 16:54:20.729: E/AndroidRuntime(5647): at android.os.Handler.handleCallback(Handler.java:605)
01-28 16:54:20.729: E/AndroidRuntime(5647): at android.os.Handler.dispatchMessage(Handler.java:92)
01-28 16:54:20.729: E/AndroidRuntime(5647): at android.os.Looper.loop(Looper.java:137)
01-28 16:54:20.729: E/AndroidRuntime(5647): at android.app.ActivityThread.main(ActivityThread.java:4516)
01-28 16:54:20.729: E/AndroidRuntime(5647): at java.lang.reflect.Method.invokeNative(Native Method)
01-28 16:54:20.729: E/AndroidRuntime(5647): at java.lang.reflect.Method.invoke(Method.java:511)
01-28 16:54:20.729: E/AndroidRuntime(5647): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
01-28 16:54:20.729: E/AndroidRuntime(5647): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
01-28 16:54:20.729: E/AndroidRuntime(5647): at dalvik.system.NativeStart.main(Native Method)
对不起，我的英语，我是乌克兰学生。
PS：使用 Http Post 发送图像- 此方法不起作用