使用Nexus 4将图片上传到服务器

时间:2014-08-19 16:33:30

标签: java android upload

我是android编程的新手。我正在尝试为Nexus 4准备好此代码: 希望有人可以提前帮助我,谢谢。

package com.sunil.upload;

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://192.168.0.15/UploadToServer.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("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
         }


}

不幸的是,我试图让它运行没有成功。 在Nexus 4上运行它需要更改什么?

这就是Eclipse告诉我的:

08-07 22:26:35.751:E / BitmapFactory(10752):无法解码流:java.lang.NullPointerException

08-08 18:46:54.408: E/BitmapFactory(16388): Unable to decode stream: java.lang.NullPointerException
08-08 18:46:58.682: W/dalvikvm(16388): threadid=12: thread exiting with uncaught exception (group=0x41cc8ba8)
08-08 18:46:58.682: E/AndroidRuntime(16388): FATAL EXCEPTION: Thread-32596
08-08 18:46:58.682: E/AndroidRuntime(16388): Process: com.sunil.upload, PID: 16388
08-08 18:46:58.682: E/AndroidRuntime(16388): java.lang.NullPointerException
08-08 18:46:58.682: E/AndroidRuntime(16388):    at java.io.File.fixSlashes(File.java:185)
08-08 18:46:58.682: E/AndroidRuntime(16388):    at java.io.File.<init>(File.java:134)
08-08 18:46:58.682: E/AndroidRuntime(16388):    at com.sunil.upload.MainActivity.uploadFile(MainActivity.java:112)
08-08 18:46:58.682: E/AndroidRuntime(16388):    at com.sunil.upload.MainActivity$1.run(MainActivity.java:69)
08-08 18:46:58.682: E/AndroidRuntime(16388):    at java.lang.Thread.run(Thread.java:841)
08-08 18:46:59.403: E/WindowManager(16388): android.view.WindowLeaked: Activity com.sunil.upload.MainActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{425df3e0 V.E..... R......D 0,0-729,192} that was originally added here
08-08 18:46:59.403: E/WindowManager(16388):     at android.view.ViewRootImpl.<init>(ViewRootImpl.java:346)
08-08 18:46:59.403: E/WindowManager(16388):     at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:248)
08-08 18:46:59.403: E/WindowManager(16388):     at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
08-08 18:46:59.403: E/WindowManager(16388):     at android.app.Dialog.show(Dialog.java:286)
08-08 18:46:59.403: E/WindowManager(16388):     at android.app.ProgressDialog.show(ProgressDialog.java:116)
08-08 18:46:59.403: E/WindowManager(16388):     at android.app.ProgressDialog.show(ProgressDialog.java:99)
08-08 18:46:59.403: E/WindowManager(16388):     at com.sunil.upload.MainActivity.onClick(MainActivity.java:64)
08-08 18:46:59.403: E/WindowManager(16388):     at android.view.View.performClick(View.java:4438)
08-08 18:46:59.403: E/WindowManager(16388):     at android.view.View$PerformClick.run(View.java:18422)
08-08 18:46:59.403: E/WindowManager(16388):     at android.os.Handler.handleCallback(Handler.java:733)
08-08 18:46:59.403: E/WindowManager(16388):     at android.os.Handler.dispatchMessage(Handler.java:95)
08-08 18:46:59.403: E/WindowManager(16388):     at android.os.Looper.loop(Looper.java:136)
08-08 18:46:59.403: E/WindowManager(16388):     at android.app.ActivityThread.main(ActivityThread.java:5001)
08-08 18:46:59.403: E/WindowManager(16388):     at java.lang.reflect.Method.invokeNative(Native Method)
08-08 18:46:59.403: E/WindowManager(16388):     at java.lang.reflect.Method.invoke(Method.java:515)
08-08 18:46:59.403: E/WindowManager(16388):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
08-08 18:46:59.403: E/WindowManager(16388):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
08-08 18:46:59.403: E/WindowManager(16388):     at dalvik.system.NativeStart.main(Native Method)

0 个答案:

没有答案