我正在尝试将手机摄像头拍摄的图像上传到服务器。由于我不熟悉在android上传图像，所以我对此并不了解。我在googling之后在互联网上进行了一个教程，它可以作为一个单独的应用程序工作但是当我在我的应用程序中使用同一个类时，它不再起作用了。我在logcat中遇到错误（我将在本文末尾发布）。我不知道这个错误是什么意思，我怎么能解决这个问题。请帮助我如何才能使这项工作？
以下是我的相机活动代码
public class Camera extends Activity {
ImageView ivUserImage;
Button bUpload;
Intent i;
int CameraResult = 0;
Bitmap bmp;
FileUpload fu;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.camera);
ivUserImage = (ImageView)findViewById(R.id.ivUserImage);
bUpload = (Button)findViewById(R.id.bUpload);
openCamera();
}
private void openCamera() {
i = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(i, CameraResult);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(resultCode == RESULT_OK) {
Bundle extras = data.getExtras();
//Log.e("Image: ", data.toString());
bmp = (Bitmap) extras.get("data");
ivUserImage.setImageBitmap(bmp);
bUpload.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
//Toast.makeText(getApplicationContext(), bmp.toString(), Toast.LENGTH_SHORT).show();
fu = new FileUpload(bmp.toString());
}
});
}
}
}
这是我的FileUpload类
public class FileUpload extends Activity {
TextView tv;
Button b;
int serverResponseCode = 0;
ProgressDialog dialog = null;
public FileUpload(final String bmp) {
dialog = ProgressDialog.show(FileUpload.this, "", "Uploading file...", true);
new Thread(new Runnable() {
public void run() {
runOnUiThread(new Runnable() {
public void run() {
tv.setText("uploading started.....");
}
});
int response= uploadFile(bmp);
//Log.e("Response: ", response);
System.out.println("RES : " + response);
}
}).start();
}
public int uploadFile(String sourceFileUri) {
String upLoadServerUri = "http://www.example.info/androidfileupload/index.php";
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()) {
Log.e("uploadFile", "Source File Does not exist");
return 0;
}
try { // open a URL connection to the Servlet
FileInputStream fileInputStream = new FileInputStream(sourceFile);
URL url = new URL(upLoadServerUri);
conn = (HttpURLConnection) url.openConnection(); // Open a HTTP connection to the URL
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);
bytesAvailable = fileInputStream.available(); // create a buffer of maximum size
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() {
tv.setText("File Upload Completed.");
Toast.makeText(FileUpload.this, "File Upload Complete.", Toast.LENGTH_SHORT).show();
}
});
}
//close the streams //
fileInputStream.close();
dos.flush();
dos.close();
} catch (MalformedURLException ex) {
dialog.dismiss();
ex.printStackTrace();
Toast.makeText(FileUpload.this, "MalformedURLException", Toast.LENGTH_SHORT).show();
Log.e("Upload file to server", "error: " + ex.getMessage(), ex);
} catch (Exception e) {
dialog.dismiss();
e.printStackTrace();
Toast.makeText(FileUpload.this, "Exception : " + e.getMessage(), Toast.LENGTH_SHORT).show();
Log.e("Upload file to server Exception", "Exception : " + e.getMessage(), e);
}
dialog.dismiss();
return serverResponseCode;
} }
这是我在logcat中得到的东西
06-10 14:26:55.320: W/IInputConnectionWrapper(23770): showStatusIcon on inactive InputConnection
06-10 14:27:03.765: D/AndroidRuntime(23770): Shutting down VM
06-10 14:27:03.765: W/dalvikvm(23770): threadid=1: thread exiting with uncaught exception (group=0x4001e578)
06-10 14:27:03.775: E/AndroidRuntime(23770): FATAL EXCEPTION: main
06-10 14:27:03.775: E/AndroidRuntime(23770): java.lang.IllegalStateException: System services not available to Activities before onCreate()
06-10 14:27:03.775: E/AndroidRuntime(23770): at android.app.Activity.getSystemService(Activity.java:3562)
06-10 14:27:03.775: E/AndroidRuntime(23770): at android.app.Dialog.<init>(Dialog.java:141)
06-10 14:27:03.775: E/AndroidRuntime(23770): at android.app.AlertDialog.<init>(AlertDialog.java:63)
06-10 14:27:03.775: E/AndroidRuntime(23770): at android.app.ProgressDialog.<init>(ProgressDialog.java:80)
06-10 14:27:03.775: E/AndroidRuntime(23770): at android.app.ProgressDialog.<init>(ProgressDialog.java:76)
06-10 14:27:03.775: E/AndroidRuntime(23770): at android.app.ProgressDialog.show(ProgressDialog.java:101)
06-10 14:27:03.775: E/AndroidRuntime(23770): at android.app.ProgressDialog.show(ProgressDialog.java:90)
06-10 14:27:03.775: E/AndroidRuntime(23770): at com.zafar.login.FileUpload.<init>(FileUpload.java:25)
06-10 14:27:03.775: E/AndroidRuntime(23770): at com.zafar.login.Camera$1.onClick(Camera.java:52)
06-10 14:27:03.775: E/AndroidRuntime(23770): at android.view.View.performClick(View.java:2538)
06-10 14:27:03.775: E/AndroidRuntime(23770): at android.view.View$PerformClick.run(View.java:9152)
06-10 14:27:03.775: E/AndroidRuntime(23770): at android.os.Handler.handleCallback(Handler.java:587)
06-10 14:27:03.775: E/AndroidRuntime(23770): at android.os.Handler.dispatchMessage(Handler.java:92)
06-10 14:27:03.775: E/AndroidRuntime(23770): at android.os.Looper.loop(Looper.java:130)
06-10 14:27:03.775: E/AndroidRuntime(23770): at android.app.ActivityThread.main(ActivityThread.java:3691)
06-10 14:27:03.775: E/AndroidRuntime(23770): at java.lang.reflect.Method.invokeNative(Native Method)
06-10 14:27:03.775: E/AndroidRuntime(23770): at java.lang.reflect.Method.invoke(Method.java:507)
06-10 14:27:03.775: E/AndroidRuntime(23770): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:907)
06-10 14:27:03.775: E/AndroidRuntime(23770): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665)
06-10 14:27:03.775: E/AndroidRuntime(23770): at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分：1)
您使用Object FileUpload创建new活动。在Android中，建议将活动设计为独立模块，并且活动由Android创建。如果您想与其他活动进行通信，则应使用Intent来执行此操作。
fu = new FileUpload(bmp.toString()); // here make error.
在android中，无法创建另一个活动的对象。
答案 1 :(得分：0)
我建议您创建一个FTP服务器并使用ftp上传文件。以下代码是从FTP服务器获取文件的方法。自定义上传：
public static boolean getFile(String serverName, String userName,
String password, String serverFilePath, String localFilePath)
throws Exception {
FTPClient ftp = new FTPClient();
try {
// ftp.setCopyStreamListener();
ftp.connect(serverName);
int reply = ftp.getReplyCode();
if (!FTPReply.isPositiveCompletion(reply)) {
ftp.disconnect();
return false;
}
} catch (IOException e) {
if (ftp.isConnected()) {
try {
ftp.disconnect();
} catch (IOException f) {
throw e;
}
}
throw e;
} catch (Exception e) {
throw e;
}
try {
// String filePath = "system/mswin.98/SETUP0.WAV";
if (!ftp.login(userName, password)) {
ftp.logout();
}
// if (binaryTransfer)
ftp.setFileType(FTPClient.BINARY_FILE_TYPE);
// ftp.enterLocalPassiveMode();
ftp.enterLocalActiveMode();
OutputStream output;
if (checkAndCreateDirectories(localFilePath)) {
output = new FileOutputStream(localFilePath);
ftp.retrieveFile(serverFilePath, output);
output.close();
}
ftp.noop(); // check that control connection is working OK
ftp.logout();
return true;
} catch (FTPConnectionClosedException e) {
throw e;
} catch (IOException e) {
throw e;
} catch (Exception e) {
throw e;
} finally {
if (ftp.isConnected()) {
try {
ftp.disconnect();
} catch (IOException f) {
throw f;
}
}
}
}