Android 上传图片文件等

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Android中经常需要上传文件图片等,因为使用volley请求数据很简便，但遇到上传文件就麻烦那可不好，同时使用多个网络请求类库也是不太建议的，所以这里自己总结了一点关于文件长传的资料

一、首先通过url地址获得文件输出流(设置请求参数)        URL url =new URL(actionUrl)        HttpURLConnection con=(HttpURLConnection)url.openConnection();        DataOutputStream ds = new DataOutputStream(con.getOutputStream());    二、获取本地要上传文件输入流        FileInputStream fStream =new FileInputStream(uploadFile);    三、将文件的输入流输出到上传输出流中        int bufferSize =1024;        byte[] buffer =newbyte[bufferSize];        int length =-1;        while((length = fStream.read(buffer)) !=-1){/* 将资料写入DataOutputStream中 */            ds.write(buffer, 0, length);        }  ds.writeBytes(end);

详细步骤如下

publicclass PhotoUpload extends Activity {    private String newName ="image.jpg";    private String uploadFile ="/sdcard/image.JPG";    private String actionUrl ="http://192.168.0.71:8086/HelloWord/myForm";    private TextView mText1;    private TextView mText2;    private Button mButton;    @Override      publicvoid onCreate(Bundle savedInstanceState)      {        super.onCreate(savedInstanceState);        setContentView(R.layout.photo_upload);        mText1 = (TextView) findViewById(R.id.myText2);        //"文件路径：\n"+        mText1.setText(uploadFile);        mText2 = (TextView) findViewById(R.id.myText3);        //"上传网址：\n"+        mText2.setText(actionUrl);        /* 设置mButton的onClick事件处理 */            mButton = (Button) findViewById(R.id.myButton);        mButton.setOnClickListener(new View.OnClickListener()        {          publicvoid onClick(View v)          {            uploadFile();          }        });      }      /* 上传文件至Server的方法 */      privatevoid uploadFile()      {        String end ="\r\n";        String twoHyphens ="--";        String boundary ="*****";        try        {          URL url =new URL(actionUrl);          HttpURLConnection con=(HttpURLConnection)url.openConnection();          /* 允许Input、Output，不使用Cache */          con.setDoInput(true);          con.setDoOutput(true);          con.setUseCaches(false);          /* 设置传送的method=POST */          con.setRequestMethod("POST");          /* setRequestProperty */          con.setRequestProperty("Connection", "Keep-Alive");          con.setRequestProperty("Charset", "UTF-8");          con.setRequestProperty("Content-Type",                             "multipart/form-data;boundary="+boundary);          /* 设置DataOutputStream */          DataOutputStream ds =            new DataOutputStream(con.getOutputStream());          ds.writeBytes(twoHyphens + boundary + end);          ds.writeBytes("Content-Disposition: form-data; "+                        "name=\"file1\";filename=\""+                        newName +"\""+ end);          ds.writeBytes(end);            /* 取得文件的FileInputStream */          FileInputStream fStream =new FileInputStream(uploadFile);          /* 设置每次写入1024bytes */          int bufferSize =1024;          byte[] buffer =newbyte[bufferSize];          int length =-1;          /* 从文件读取数据至缓冲区 */          while((length = fStream.read(buffer)) !=-1)          {            /* 将资料写入DataOutputStream中 */            ds.write(buffer, 0, length);          }          ds.writeBytes(end);          ds.writeBytes(twoHyphens + boundary + twoHyphens + end);          /* close streams */          fStream.close();          ds.flush();          /* 取得Response内容 */          InputStream is = con.getInputStream();          int ch;          StringBuffer b =new StringBuffer();          while( ( ch = is.read() ) !=-1 )          {            b.append( (char)ch );          }          /* 将Response显示于Dialog */          showDialog("上传成功"+b.toString().trim());          /* 关闭DataOutputStream */          ds.close();        }        catch(Exception e)        {          showDialog("上传失败"+e);        }      }      /* 显示Dialog的method */      privatevoid showDialog(String mess)      {        new AlertDialog.Builder(PhotoUpload.this).setTitle("Message")         .setMessage(mess)         .setNegativeButton("确定",new DialogInterface.OnClickListener()         {           publicvoid onClick(DialogInterface dialog, int which)           {                     }         })         .show();      }    }

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