我是Android编程的新手，我的任务是将图像和文本数据发送到Web服务器（localhost），但是我已经尝试了很多代码来完成这项工作
他们都不会工作。每当我尝试执行代码时，我的应用程序就崩溃了，所以我决定调试代码，看看问题是什么。然后我发现了
每当找到 MultipartEntity 时，代码就会崩溃..我真的不知道为什么......
守则就像这样
Log.v(TAG, "(1)");
HttpClient httpClient;
HttpPost postRequest;
Log.v(TAG, "(2)" + picturePath);
MultipartEntity reqEntity;
ResponseHandler<String> responseHandler;
Log.v(TAG, "(3)");
File file;
FileBody fileBody;
Log.v(TAG, "(4)");
httpClient = new DefaultHttpClient();
postRequest = new HttpPost("http://192.168.5.132/mysite/test.php");
responseHandler = new BasicResponseHandler();
Log.v(TAG, "(5)");
// Indicate that this information comes in parts (text and file)
reqEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
Log.v(TAG, "(6)");
file = new File(picturePath);
fileBody = new FileBody(file, "images/jpeg");
reqEntity.addPart("fileupload", fileBody);
Log.v(TAG, "(7)");
try {
reqEntity.addPart("username", new StringBody("un"));
reqEntity.addPart("password", new StringBody("pw"));
postRequest.setEntity(reqEntity);
httpClient.execute(postRequest, responseHandler);
}
catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
catch (ClientProtocolException e) {
e.printStackTrace();
}
catch (IOException e) {
e.printStackTrace();
}
我已将日志包含在代码中以查看代码在执行期间停止的位置。这是log cat输出！
08-27 12:22:47.153: V/(10358): (1)
08-27 12:22:47.153: V/(10358): (2)/storage/sdcard0/Pictures/boarding_pass.bmp
08-27 12:22:47.153: V/(10358): (3)
08-27 12:22:47.153: V/(10358): (4)
08-27 12:22:47.153: V/(10358): (5)
08-27 12:22:47.153: D/AndroidRuntime(10358): Shutting down VM
08-27 12:22:47.153: W/dalvikvm(10358): threadid=1: thread exiting with uncaught exception
(group=0x417da2a0)
08-27 12:22:47.163: E/AndroidRuntime(10358): FATAL EXCEPTION: main
08-27 12:22:47.163: E/AndroidRuntime(10358): java.lang.IllegalStateException: Could not execute
method of the activity
08-27 12:22:47.163: E/AndroidRuntime(10358): at android.view.View$1.onClick(View.java:3614)
08-27 12:22:47.163: E/AndroidRuntime(10358): at android.view.View.performClick(View.java:4107)
08-27 12:22:47.163: E/AndroidRuntime(10358): at
android.view.View$PerformClick.run(View.java:17056)
08-27 12:22:47.163: E/AndroidRuntime(10358): at android.os.Handler.handleCallback(Handler.java:615)
08-27 12:22:47.163: E/AndroidRuntime(10358): at android.os.Handler.dispatchMessage(Handler.java:92)
08-27 12:22:47.163: E/AndroidRuntime(10358): at android.os.Looper.loop(Looper.java:137)
08-27 12:22:47.163: E/AndroidRuntime(10358): at
android.app.ActivityThread.main(ActivityThread.java:4830)
08-27 12:22:47.163: E/AndroidRuntime(10358): at java.lang.reflect.Method.invokeNative(Native Method)
08-27 12:22:47.163: E/AndroidRuntime(10358): at java.lang.reflect.Method.invoke(Method.java:511)
08-27 12:22:47.163: E/AndroidRuntime(10358): at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
08-27 12:22:47.163: E/AndroidRuntime(10358): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556)
08-27 12:22:47.163: E/AndroidRuntime(10358): at dalvik.system.NativeStart.main(Native Method)
08-27 12:22:47.163: E/AndroidRuntime(10358): Caused by: java.lang.reflect.InvocationTargetException
08-27 12:22:47.163: E/AndroidRuntime(10358): at java.lang.reflect.Method.invokeNative(Native
Method)
......
真的需要你的帮助..非常感谢你..
答案 0 :(得分：6)
尝试此代码100％正常工作。通过多部分数据传递完成图像上传
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.fileupload.MainActivity"
tools:ignore="MergeRootFrame" >
<ImageView
android:id="@+id/imageView_pic"
android:layout_width="100dp"
android:layout_height="150dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:src="@drawable/abc_ab_bottom_solid_light_holo" />
<Button
android:id="@+id/button_selectpic"
android:layout_width="250dp"
android:layout_height="50dp"
android:layout_below="@+id/imageView_pic"
android:layout_centerHorizontal="true"
android:layout_marginTop="18dp"
android:text="Browse" />
<Button
android:id="@+id/uploadButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/button_selectpic"
android:layout_alignRight="@+id/button_selectpic"
android:layout_below="@+id/button_selectpic"
android:text="upload" />
<TextView
android:id="@+id/messageText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/uploadButton"
android:layout_alignRight="@+id/uploadButton"
android:layout_below="@+id/uploadButton"
android:layout_marginTop="38dp"
android:text=""
android:textAppearance="?android:attr/textAppearanceMedium" />
</RelativeLayout>
Android代码
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);
messageText = (TextView)findViewById(R.id.messageText);
btnselectpic = (Button)findViewById(R.id.button_selectpic);
imageview = (ImageView)findViewById(R.id.imageView_pic);
btnselectpic.setOnClickListener(this);
uploadButton.setOnClickListener(this);
upLoadServerUri = "http://192.168.2.4/fileupload/upljson.php";
}
@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("file", fileName);
dos = new DataOutputStream(conn.getOutputStream());
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"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"
+" C:/xamp/wamp/fileupload/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
}
}
php服务器代码
<?php
$response = array();
if (empty($_FILES) || $_FILES['file']['error']) {
$response["code"] = 2;
$response["message"] = "failed to move uploaded file";
echo json_encode($response);
}
$chunk = isset($_REQUEST["chunk"]) ? intval($_REQUEST["chunk"]) : 0;
$chunks = isset($_REQUEST["chunks"]) ? intval($_REQUEST["chunks"]) : 0;
$fileName = isset($_REQUEST["name"]) ? $_REQUEST["name"] : $_FILES["file"]["name"];
$filePath = "uploads/$fileName";
// Open temp file
$out = @fopen("{$filePath}.part", $chunk == 0 ? "wb" : "ab");
if ($out) {
// Read binary input stream and append it to temp file
$in = @fopen($_FILES['file']['tmp_name'], "rb");
if ($in) {
while ($buff = fread($in, 4096))
fwrite($out, $buff);
} else
$response["code"] = 2;
$response["message"] = "Oops! Failed to open input Stream error occurred.";
echo json_encode($response);
@fclose($in);
@fclose($out);
@unlink($_FILES['file']['tmp_name']);
} else
$response["code"] = 2;
$response["message"] = "Oops! Failed to open output error occurred.";
echo json_encode($response);
// Check if file has been uploaded
if (!$chunks || $chunk == $chunks - 1) {
// Strip the temp .part suffix off
rename("{$filePath}.part", $filePath);
}
$response["code"] = 2;
$response["message"] = "successfully uploaded";
echo json_encode($response);
?>
以上代码100％正常工作。 如果你想要多部分实体传递，请在你的程序必要的地方尝试这个代码，并在你的php服务器上添加$ _post方法，例如（$ name = $ _ POST ['username'];）
entity.addPart("user_id", new StringBody(user_id));
Log.d("userid",user_id);
entity.addPart("username", new StringBody(username));
entity.addPart("password", new StringBody(password));
entity.addPart("filetype",new StringBody("jpeg"));
// entity.addPart("photo", new
// StringBody("/storage/sdcard0/Download/1.jpg"));
httpPost.setEntity(entity);
Log.d("URL Request: ", url.toString());
HttpResponse httpResponse = httpClient.execute(httpPost);
int code = httpResponse.getStatusLine().getStatusCode();
将所需的值传递给此函数并在php上添加$ _post [“username”]，$ _ post [“password”]
public JSONObject getJSONFromUrl(String url, String username,
String password, String photo_path) {
InputStream is = null;
JSONObject jObj = null;
static String jsonResp = "";
String CONTENT_TYPE_JSON = "application/json";
static String json = "";
Context context;
try {
File file = null;
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
MultipartEntity entity = new MultipartEntity(
HttpMultipartMode.BROWSER_COMPATIBLE);
if(photo_path != null)
file = new File(photo_path);
//temp end
entity.addPart("username", new StringBody(username));
entity.addPart("password", new StringBody(password));
entity.addPart("file", new FileBody(file));
entity.addPart("filetype",new StringBody("jpeg"));
// entity.addPart("photo", new
// StringBody("/storage/sdcard0/Download/1.jpg"));
httpPost.setEntity(entity);
Log.d("URL Request: ", url.toString());
HttpResponse httpResponse = httpClient.execute(httpPost);
int code = httpResponse.getStatusLine().getStatusCode();
if (code != 200) {
Log.d("HTTP response code is:", Integer.toString(code));
return null;
} else {
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
}
} catch (ConnectTimeoutException e) {
// TODO: handle exception
Log.e("Timeout Exception", e.toString());
return null;
} catch (SocketTimeoutException e) {
// TODO: handle exception
Log.e("Socket Time out", e.toString());
return null;
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
return null;
} catch (ClientProtocolException e) {
e.printStackTrace();
return null;
} catch (IOException e) {
e.printStackTrace();
return null;
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
jsonResp = sb.toString();
Log.d("Content: ", sb.toString());
} catch (Exception e) {
Log.e("Buffer Error", "Error converting Response " + e.toString());
return null;
}
// try parse the string to a JSON object
try {
jObj = new JSONObject(jsonResp);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON Object
return jObj;
}
答案 1 :(得分：0)
设备/仿真器本身是一台拥有自己的localhost循环的机器。
如您所知，当您使用模拟器时，localhost（127.0.0.1）指的是设备自己的环回服务，而不是您所期望的机器上的服务。
因此，每当您给locahost / 127.0.0.x这意味着它试图在您的设备环境中搜索您的服务时，它就会失败。因为您的Web服务项目在设备/模拟器循环中不可用。
因此可以使用10.0.2.2访问您的实际机器，它是一个设置为帮助开发的别名。
网络地址空间 看看这个。 http://developer.android.com/tools/devices/emulator.html#networkaddresses
答案 2 :(得分：0)
试试这个，它可以帮助你，并且使用AsyncHttpClient库完成，获取jar文件并将其附加到项目中，然后使用以下代码上传任何文件 -
RequestParams params=new RequestParams();
String file = getImagePath().toString();//get path of file you want to upload
File myfile_one=new File(file);
try {
params.put("image1", myfile_one);//image 1 is the key(it uses key-value pair)
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
AsyncHttpClient client=new AsyncHttpClient();
client.post(Constant.url_two, params,new AsyncHttpResponseHandler(){
//here implement the methods of library and write rest of your code
}
您可以在this链接中找到连接服务器的其他方法。试一试，它非常简单
答案 3 :(得分：0)