我想通过POST将图像存储在服务器中，发送的图像是从本地存储单元发送的，这是我在Android中的代码异步类：
class ImageUpload extends AsyncTask<Void, Void, String>{
@Override
protected String doInBackground(Void... var) {
System.out.println(incidentId);
HttpURLConnection connection = null;
DataOutputStream outputStream = null;
InputStream inputStream = null;
String twoHyphens = "--";
String boundary = "*****" + Long.toString(System.currentTimeMillis()) + "*****";
String lineEnd = "\r\n";
String result = "";
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1 * 1024 * 1024;
String[] q = mCurrentPhotoPath.split("/");
int idx = q.length - 1;
try {
File file = new File(mCurrentPhotoPath);
FileInputStream fileInputStream = new FileInputStream(file);
URL url = new URL(url_add_attachment);
connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.setDoOutput(true);
connection.setUseCaches(false);
connection.setRequestMethod("POST");
connection.setRequestProperty("Content-Type", "multipart/form-data; charset=UTF-8");
connection.setRequestProperty("Accept", "application/json");
outputStream = new DataOutputStream(connection.getOutputStream());
outputStream.writeBytes(twoHyphens + lineEnd);
outputStream.writeBytes("Content-Disposition: form-data; name=\"" + "file" + "\"; filename=\"" + q[idx] + "\"" + lineEnd);
outputStream.writeBytes("Content-Type: " + "image" + lineEnd);
outputStream.writeBytes("Content-Transfer-Encoding: binary" + lineEnd);
outputStream.writeBytes(lineEnd);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = new byte[bufferSize];
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
outputStream.write(buffer, 0, bufferSize);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
outputStream.writeBytes(lineEnd);
try {
outputStream.writeBytes(twoHyphens + lineEnd);
//outputStream.writeBytes("Content-Disposition: form-data; name=\"" + key + "\"" + lineEnd);
outputStream.writeBytes("Content-Type: text/plain" + lineEnd);
outputStream.writeBytes(lineEnd);
outputStream.writeBytes(lineEnd);
//}
outputStream.writeBytes(twoHyphens + twoHyphens + lineEnd);
} catch (Exception e) {
e.printStackTrace();
}
int status = connection.getResponseCode();
InputStream in;
if(status >= HttpStatus.SC_BAD_REQUEST)
in = connection.getErrorStream();
else
in = connection.getInputStream();
inputStream = connection.getInputStream();
result = convertStreamToString(in);
fileInputStream.close();
inputStream.close();
outputStream.flush();
outputStream.close();
}catch(Exception e){
e.printStackTrace();
}
return result;
}
}
服务器抛出400错误响应也向我发送异常：
java.io.FileNotFoundException: http://10.0.2.2/app_dev.php/incidents/8/attachments
答案 0 :(得分：0)
MainActivity.java
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity implements OnClickListener{
private TextView messageText;
private Button uploadButton, btnselectpic;
private ImageView imageview;
private int serverResponseCode = 0;
private ProgressDialog dialog = null;
private String upLoadServerUri = null;
private String imagepath=null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
uploadButton = (Button)findViewById(R.id.uploadButton);
btnselectpic = (Button)findViewById(R.id.button_selectpic);
messageText = (TextView)findViewById(R.id.messageText);
imageview = (ImageView)findViewById(R.id.imageView_pic);
btnselectpic.setOnClickListener(this);
uploadButton.setOnClickListener(this);
upLoadServerUri = "http://10.0.2.2/uploads/UploadToServer.php";
ImageView img= new ImageView(this);
}
@Override
public void onClick(View arg0) {
if(arg0==btnselectpic)
{
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Complete action using"), 1);
}
else if (arg0==uploadButton) {
dialog = ProgressDialog.show(MainActivity.this, "", "Uploading file...", true);
messageText.setText("uploading started.....");
new Thread(new Runnable() {
public void run() {
uploadFile(imagepath);
}
}).start();
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 1 && resultCode == RESULT_OK) {
//Bitmap photo = (Bitmap) data.getData().getPath();
Uri selectedImageUri = data.getData();
imagepath = getPath(selectedImageUri);
Bitmap bitmap=BitmapFactory.decodeFile(imagepath);
imageview.setImageBitmap(bitmap);
messageText.setText("Uploading file path:" +imagepath);
}
}
public String getPath(Uri uri) {
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = managedQuery(uri, projection, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
public int uploadFile(String sourceFileUri) {
String fileName = sourceFileUri;
HttpURLConnection conn = null;
DataOutputStream dos = null;
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1 * 1024 * 1024;
File sourceFile = new File(sourceFileUri);
if (!sourceFile.isFile()) {
dialog.dismiss();
Log.e("uploadFile", "Source File not exist :"+imagepath);
runOnUiThread(new Runnable() {
public void run() {
messageText.setText("Source File not exist :"+ imagepath);
}
});
return 0;
}
else
{
try {
// open a URL connection to the Servlet
FileInputStream fileInputStream = new FileInputStream(sourceFile);
URL url = new URL(upLoadServerUri);
// Open a HTTP connection to the URL
conn = (HttpURLConnection) url.openConnection();
conn.setDoInput(true); // Allow Inputs
conn.setDoOutput(true); // Allow Outputs
conn.setUseCaches(false); // Don't use a Cached Copy
conn.setRequestMethod("POST");
conn.setRequestProperty("Connection", "Keep-Alive");
conn.setRequestProperty("ENCTYPE", "multipart/form-data");
conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
conn.setRequestProperty("uploaded_file", fileName);
dos = new DataOutputStream(conn.getOutputStream());
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"uploaded_file\";filename=\""
+ fileName + "\"" + 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);
// Responses from the server (code and message)
serverResponseCode = conn.getResponseCode();
String serverResponseMessage = conn.getResponseMessage();
Log.i("uploadFile", "HTTP Response is : "
+ serverResponseMessage + ": " + serverResponseCode);
if(serverResponseCode == 200){
runOnUiThread(new Runnable() {
public void run() {
String msg = "File Upload Completed.\n\n See uploaded file here : \n\n"
+" F:/wamp/wamp/www/uploads";
messageText.setText(msg);
Toast.makeText(MainActivity.this, "File Upload Complete.", Toast.LENGTH_SHORT).show();
}
});
}
//close the streams //
fileInputStream.close();
dos.flush();
dos.close();
} catch (MalformedURLException ex) {
dialog.dismiss();
ex.printStackTrace();
runOnUiThread(new Runnable() {
public void run() {
messageText.setText("MalformedURLException Exception : check script url.");
Toast.makeText(MainActivity.this, "MalformedURLException", Toast.LENGTH_SHORT).show();
}
});
Log.e("Upload file to server", "error: " + ex.getMessage(), ex);
} catch (Exception e) {
dialog.dismiss();
e.printStackTrace();
runOnUiThread(new Runnable() {
public void run() {
messageText.setText("Got Exception : see logcat ");
Toast.makeText(MainActivity.this, "Got Exception : see logcat ", Toast.LENGTH_SHORT).show();
}
});
Log.e("Upload file to server Exception", "Exception : " + e.getMessage(), e);
}
dialog.dismiss();
return serverResponseCode;
} // End else block
}
}
activity_main.xml中
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<ImageView
android:id="@+id/imageView_pic"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_gravity="center"
android:src="@drawable/ic_launcher" />
<Button
android:id="@+id/button_selectpic"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Select Picture" />
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Click To Upload File"
android:id="@+id/uploadButton"
/>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text=""
android:id="@+id/messageText"
android:textColor="#000000"
android:textStyle="bold"
/>
</LinearLayout>
Mainfest file ::
<uses-permission android:name="android.permission.INTERNET"/>
UploadToServer.php
<?php
$file_path = "../image upload folder name here/";
$file_path = $file_path . basename( $_FILES['uploaded_file']['name']);
if(move_uploaded_file($_FILES['uploaded_file']['tmp_name'], $file_path)) {
// echo "success";
} else{
// echo "fail";
}
?>
答案 1 :(得分：0)
您可以使用以下方法传递服务器网址以上传任何文件。使用您的实际文件更改给定代码中的文件参数。
public static HttpResponse uploadFile(String url) throws ClientProtocolException, IOException {
try {
// the file to be posted
String textFile = Environment.getExternalStorageDirectory() + "/file.txt";
// /.v(TAG, "textFile: " + textFile);
// Log.v(TAG, "postURL: " + url);
HttpParams httpParameters = new BasicHttpParams();
// Set the timeout in milliseconds until a connection is
// established.
// The default value is zero, that means the timeout is not used.
int timeoutConnection = 10000;
// HttpConnectionParams.setConnectionTimeout(httpParameters,
// timeoutConnection);
// Set the default socket timeout (SO_TIMEOUT)
// in milliseconds which is the timeout for waiting for data.
int timeoutSocket = 5000;
// HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);
HttpClient httpClient = new DefaultHttpClient(httpParameters);
// post header
HttpPost httpPost = new HttpPost(url);
File file = new File(textFile);
FileBody fileBody = new FileBody(file);
MultipartEntityBuilder mBuilder = MultipartEntityBuilder.create();
mBuilder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
mBuilder.addPart("fileUpload", fileBody);
httpPost.setEntity(mBuilder.build());
return httpClient.execute(httpPost);
} catch (NullPointerException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}