问题
I'm trying to write a small code that allows me to send picture directly after taking it from the camera, I mean when I take picture from the camera, this picture will be sent directly to the server without to store in my phone or in the sdcard, So I made this Code but I dont know if it is correct, because Actually it shows me much message error but I don't know where is the problem or if someone can tell me where can I find similar code,
// Upload Direct From Camera
camButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent_gallery = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
intent_gallery.putExtra( MediaStore.EXTRA_OUTPUT, SERVER_URL + "uploadFromCamera.php" );
startActivityForResult(intent_gallery, SELECT_IMAGE);
}
});
...
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
if (requestCode == SELECT_IMAGE) {
Uri selectedImageUri = data.getData();
String selectedImagePath = getPath( selectedImageUri );
String url = SERVER_URL + "uploadFromCamera.php";
if ( selectedImagePath != null ) {
//Send to server
}
}
}
}
public String getPath(Uri uri) {
String result = null;
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(uri, projection, null, null, null);
if(cursor.moveToFirst()){;
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
result = cursor.getString(column_index);
}
cursor.close();
return result;
}
回答1:
This code helps to upload a image to TomCat server.
Android app
import java.io.ByteArrayOutputStream;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import android.support.v7.app.ActionBarActivity;
import android.annotation.SuppressLint;
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.AsyncTask;
import android.os.Bundle;
import android.provider.MediaStore;
import android.util.Base64;
import android.view.View;
import android.widget.ImageView;
import android.widget.Toast;
import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.AsyncHttpResponseHandler;
import com.loopj.android.http.RequestParams;
@SuppressLint("NewApi")
public class MainActivity extends Activity {
ProgressDialog prgDialog;
String encodedString;
RequestParams params = new RequestParams();
String imgPath, fileName;
Bitmap bitmap, lesimg;
private static int RESULT_LOAD_IMG = 1;
private static int REQUEST_IMAGE_CAPTURE = 1;
private static String TIME_STAMP="null";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
prgDialog = new ProgressDialog(this);
prgDialog.setCancelable(false);
}
public void loadImagefromGallery(View view) {
Intent galleryIntent = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(galleryIntent, RESULT_LOAD_IMG);
}
public void dispatchTakePictureIntent(View view) {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
Bundle extras = data.getExtras();
Bitmap imageBitmap = (Bitmap) extras.get("data");
ImageView imgView = (ImageView) findViewById(R.id.imgView);
imgView.setImageBitmap(imageBitmap);
lesimg=imageBitmap;
String currentDateTimeString = DateFormat.getDateTimeInstance().format(new Date());
String hjkl=currentDateTimeString.replaceAll(" ", "_");
String hiop=hjkl.replaceAll(":", "-");
TIME_STAMP=hiop;
fileName=TIME_STAMP+".jpeg";
params.put("filename", fileName);
}
}
public void uploadImage(View v) {
encodeImagetoString();
}
public void encodeImagetoString() {
new AsyncTask<Void, Void, String>() {
protected void onPreExecute() {
};
@Override
protected String doInBackground(Void... params) {
BitmapFactory.Options options = null;
options = new BitmapFactory.Options();
options.inSampleSize = 3;
bitmap=lesimg;
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 50, stream);
byte[] byte_arr = stream.toByteArray();
encodedString = Base64.encodeToString(byte_arr, 0);
return "";
}
@Override
protected void onPostExecute(String msg) {
prgDialog.setMessage("Calling Upload");
prgDialog.show();
params.put("image", encodedString);
triggerImageUpload();
}
}.execute(null, null, null);
}
public void triggerImageUpload() {
makeHTTPCall();
}
public void makeHTTPCall() {
prgDialog.setMessage("Invoking JSP");
prgDialog.show();
AsyncHttpClient client = new AsyncHttpClient();
client.post("http://Your Ip Address or Localhost:8080/ImageUploadWebApp/uploadimg.jsp",
params, new AsyncHttpResponseHandler() {
@Override
public void onSuccess(String response) {
prgDialog.hide();
Toast.makeText(getApplicationContext(), response,
Toast.LENGTH_LONG).show();
}
@Override
public void onFailure(int statusCode, Throwable error,
String content) {
prgDialog.hide();
if (statusCode == 404) {
Toast.makeText(getApplicationContext(),
"Requested resource not found",
Toast.LENGTH_LONG).show();
}
else if (statusCode == 500) {
Toast.makeText(getApplicationContext(),
"Something went wrong at server end",
Toast.LENGTH_LONG).show();
}
else {
Toast.makeText(
getApplicationContext(),
"Error Occured \n Most Common Error: \n1. Device not connected to Internet\n2. Web App is not deployed in App server\n3. App server is not running\n HTTP Status code : "
+ statusCode, Toast.LENGTH_LONG)
.show();
}
}
});
}
@Override
protected void onDestroy() {
super.onDestroy();
if (prgDialog != null) {
prgDialog.dismiss();
}
}
}
Android xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ImageView
android:id="@+id/imgView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1" >
</ImageView>
<Button
android:id="@+id/buttonLoadPicture"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_weight="0"
android:onClick="dispatchTakePictureIntent"
android:text="Click Picture" >
</Button>
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="25dp"
android:onClick="uploadImage"
android:text="Upload" />
</LinearLayout>
Server Part Create a Dynamic Web Project in Eclipse and run it using TomCat Server
WebApp
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.apache.commons.codec.binary.Base64;
public class ManipulateImage {
public static byte[] convertStringtoImage(String encodedImageStr, String fileName) {
byte[] imageByteArray = Base64.decodeBase64(encodedImageStr);
try {
// URL url = new URL("http://www.amrood.com/index.htm?language=en#j2se");
imageByteArray = Base64.decodeBase64(encodedImageStr);
// Write Image into File system - Make sure you update the path
FileOutputStream imageOutFile = new FileOutputStream("C:/Some file Path" + fileName);
imageOutFile.write(imageByteArray);
imageOutFile.close();
System.out.println("Image Successfully Stored");
} catch (FileNotFoundException fnfe) {
System.out.println("Image Path not found" + fnfe);
} catch (IOException ioe) {
System.out.println("Exception while converting the Image " + ioe);
}
return imageByteArray;
}
public static String[] display(){
File folder = new File("C:/Some file Path");
File[] listOfFiles = folder.listFiles();
String [] k = new String[listOfFiles.length];
Arrays.fill(k,"none");
for (int i = 0; i < listOfFiles.length; i++) {
if (listOfFiles[i].isFile()) {
System.out.println("File " + listOfFiles[i].getName());
k[i]="File " + listOfFiles[i].getName();
} else if (listOfFiles[i].isDirectory()) {
System.out.println("Directory " + listOfFiles[i].getName());
}
}
return k;
}
}
Servlet
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.ResourceBundle;
import java.util.StringTokenizer;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class DisplayImageServlet extends javax.servlet.http.HttpServlet implements javax.servlet.Servlet {
static final long serialVersionUID = 1L;
String image_name = "";
ResourceBundle props = null;
String filePath = "";
private static final int BUFSIZE = 100;
private ServletContext servletContext;
public DisplayImageServlet() {
super();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("FROM SERVLET");
sendImage(getServletContext(), request, response);
}
public void sendImage(ServletContext servletContext,
HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
this.servletContext = servletContext;
String reqUrl = request.getRequestURL().toString();
StringTokenizer tokens = new StringTokenizer(reqUrl, "/");
int noOfTokens = tokens.countTokens();
String tokensString[] = new String[noOfTokens];
int count = 0;
while (tokens.hasMoreElements()) {
tokensString[count++] = (String) tokens.nextToken();
}
String folderName = tokensString[noOfTokens - 2];
image_name = tokensString[noOfTokens - 1];
filePath = "/" + folderName + "/" + image_name;
String fullFilePath = "D:/AndroidStudioProjects" + filePath;
System.out.println("FULL PATH :: "+fullFilePath);
doDownload(fullFilePath, request, response);
}
private void doShowImageOnPage(String fullFilePath,
HttpServletRequest request, HttpServletResponse response)
throws IOException {
response.reset();
response.setHeader("Content-Disposition", "inline");
response.setHeader("Cache-Control", "no-cache");
response.setHeader("Expires", "0");
response.setContentType("image/tiff");
byte[] image = getImage(fullFilePath);
OutputStream outputStream = response.getOutputStream();
outputStream.write(image);
outputStream.close();
}
private void doDownload(String filePath, HttpServletRequest request,
HttpServletResponse response) throws IOException {
File fileName = new File(filePath);
int length = 0;
ServletOutputStream outputStream = response.getOutputStream();
ServletContext context = servletContext;
String mimetype = context.getMimeType(filePath);
response.setContentType((mimetype != null) ? mimetype
: "application/octet-stream");
response.setContentLength((int) fileName.length());
response.setHeader("Content-Disposition", "attachment; filename=\""
+ image_name + "\"");
byte[] bbuf = new byte[BUFSIZE];
DataInputStream in = new DataInputStream(new FileInputStream(fileName));
while ((in != null) && ((length = in.read(bbuf)) != -1)) {
outputStream.write(bbuf, 0, length);
}
in.close();
outputStream.flush();
outputStream.close();
}
private byte[] getImage(String filename) {
byte[] result = null;
String fileLocation = filename;
File f = new File(fileLocation);
result = new byte[(int)f.length()];
try {
FileInputStream in = new FileInputStream(fileLocation);
in.read(result);
}
catch(Exception ex) {
System.out.println("GET IMAGE PROBLEM :: "+ex);
ex.printStackTrace();
}
return result;
}
}
Put this Jsp inside Web Content
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%
String imgEncodedStr = request.getParameter("image");
String fileName = request.getParameter("filename");
System.out.println("Filename: "+ fileName);
if(imgEncodedStr != null){
response.setIntHeader("Refresh", 1);
byte[] imageByteArray=( ManipulateImage.convertStringtoImage(imgEncodedStr, fileName));//edited
System.out.println("Inside if");
out.print("Image upload complete, Please check your directory");
} else{
System.out.println("Inside else");
out.print("Image is empty");
}
%>
You can see the uploaded image in the folder given.
回答2:
this is the sample code to upload image to PHP server :
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case 1:
if(data != null && data.getData() != null){
Uri _uri = data.getData();
if (_uri != null) {
Cursor cursor = getContentResolver().query(_uri, new String[] { android.provider.MediaStore.Images.ImageColumns.DATA }, null, null, null);
cursor.moveToFirst();
final String imageFilePath = cursor.getString(0);
Log.w("","image url : "+imageFilePath);
new Thread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
UploadFile upload = new UploadFile(UserID.getText().toString(), SignUp.this);
upload.uploadFile(imageFilePath);
}
}).start();
innitSignUp();
}
}
break;
default:
break;
}
////------------ uploadfile code :
public class UploadFile {
private String upLoadServerUri = null;
String t_name;
Context context;
public UploadFile(String filepath, Context context) {
t_name = filepath;
this.context = context;
}
public int uploadFile(String sourceFileUri) {
String fileName = sourceFileUri;
int serverResponseCode = 200;
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()) {
return 0;
} else {
try {
// open a URL connection to the Servlet
FileInputStream fileInputStream = new FileInputStream(
sourceFile);
upLoadServerUri = context.getString(R.string.httpUploadImage);
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="+"'"
+ t_name + ".jpg'" + 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);
// close the streams
fileInputStream.close();
dos.flush();
dos.close();
} catch (MalformedURLException ex) {
Log.e("Upload file to server", "error: " + ex.getMessage(), ex);
} catch (Exception e) {
} // End else block
}
return serverResponseCode;
}
}
回答3:
Used this method with pass perimeter and filename must set username.jpg "image format like .png/.jpg"
public static String mediaFileUriString(Context context, Uri finalPicUri,
String filename) {
try {
String[] filePathColumn = {MediaStore.Images.Media.DATA};
Cursor cursor = context.getContentResolver().query(finalPicUri,
filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
return picturePath;
} catch (Exception e) {
return AppConstant.storagePath.getAbsolutePath().concat("/").concat(filename);
}
}
回答4:
I did this tutorial, hope it helps, I use Retrofit to send it to server
private void dispatchTakePictureIntent() {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
// Ensure that there's a camera activity to handle the intent
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
// Create the File where the photo should go
File photoFile = null;
try {
photoFile = createImageFile();
} catch (IOException ex) {
// Error occurred while creating the File
ex.printStackTrace();
}
// Continue only if the File was successfully created
if (photoFile != null) {
Uri photoURI = FileProvider.getUriForFile(MainActivity.this,
"com.example.cedancp.uploadimage",
photoFile);
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
startActivityForResult(takePictureIntent, MainActivity.RC_CAPTURE_IMAGE);
}
}
}
private File createImageFile() throws IOException {
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp + "_";
File storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES);
File image = File.createTempFile(
imageFileName, /* prefix */
".jpg", /* suffix */
storageDir /* directory */
);
currentImagePath = image.getPath(); //Save current image path to send later to server
return image;
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case RC_CAPTURE_IMAGE:
Log.i(TAG, "RESULT CODE " + resultCode);
if (resultCode == RESULT_OK) {
if(currentImagePath.length() > 0)
sendImageToServer(currentImagePath);
}else{
currentImagePath = "";
Toast.makeText(MainActivity.this,"Error capturing image",Toast.LENGTH_SHORT).show();
}
break;
default:
super.onActivityResult(requestCode, resultCode, data);
break;
}
}
private void sendImageToServer(String imagePath, final boolean camera){
final File image = new File(imagePath);
if(image != null) {
RequestBody requestFile = RequestBody.create(MediaType.parse("multipart/form-data"), image);
MultipartBody.Part body = MultipartBody.Part.createFormData("image", image.getName(), requestFile);
Call<JsonObject> call = api.uploadImage(body);
call.enqueue(new Callback<JsonObject>() {
@Override
public void onResponse(Call<JsonObject> call, Response<JsonObject> response) {
if(response.code() == 200){
Toast.makeText(MainActivity.this,"Image Uploaded!",Toast.LENGTH_SHORT).show();
if(camera){ //Delete image if it was taken from camera
image.delete();
}
}
}
@Override
public void onFailure(Call<JsonObject> call, Throwable t) {
}
});
}
}
Disclosure: This link is to my own blog.
Tutorial upload image to server
来源：https://stackoverflow.com/questions/20928101/capture-image-from-camera-and-send-it-directly-to-server