An example of how android uploads an image, including how to terminate the upload process, if the progress bar is updated during the upload (2)

An example of how android uploads an image, including how to terminate the upload process, if the progress bar is updated during the upload (2)

Upload can be implemented as follows:

Execute in activity:

private class UploadPhotoTask extends AsyncTask
 
  {    @Overrideprotected void onPreExecute() {super.onPreExecute();}protected Boolean doInBackground(String... params) {    return HttpUploadedFile.getInstance().doUploadPhoto(getApplicationContext(), mUploadFilePathName, mHandler);    }          protected void onPostExecute(Boolean result){    mIsUploading = false;    showProgressBar(false);if(result){Toast.makeText(UploadPhotoActivity.this, R.string.upload_photo_fail, Toast.LENGTH_SHORT).show();}else{Toast.makeText(UploadPhotoActivity.this, R.string.upload_photo_fail, Toast.LENGTH_SHORT).show();}    }}
 

Write a handle to update the progress bar:

/** Handler to get handle Y from upload photo engine */private Handler mHandler = new Handler () {@ Overridepublic void handleMessage (Message msg) {switch (msg. what) {case HttpUploadedFile. POST_PROGRESS_NOTIFY: int completePercent = msg. arg1; HandleUploadProgress (completePercent); break; default: break ;}};/*** handle the uploading progress notification */private void HandleUploadProgress (int completePercent) {View containerView = findViewById (R. id. photo_upload_progress_bar_container); int maxLen = containerView. getWidth ();// This is the width of the parent layout of the progress bar.Int barLen = (completePercent * maxLen)/100; View barView = findViewById (R. id. photo_upload_progress_bar); LayoutParams = new LayoutParams (); params. height = LayoutParams. FILL_PARENT; params. width = barLen; barView. setLayoutParams (params); // Update progress bar Width}/*** show or hide progress bar */private void showProgressBar (boolean show) {View view = findViewById (R. id. photo_upload_progress_layout); if (show) {view. setVisibility (View. VISIBLE); View bar = view. findViewById (R. id. photo_upload_progress_bar); LayoutParams = new LayoutParams (); params. height = LayoutParams. FILL_PARENT; params. width = 3; bar. setLayoutParams (params);} else {view. setVisibility (View. GONE );}}

The following is the upload module:

Public class HttpUploadedFile {/** single instance of this class */private static HttpUploadedFile instance = null;/*** Constructor */private HttpUploadedFile () {}/*** Factory method */public static synchronized HttpUploadedFile getInstance () {if (instance = null) {instance = new HttpUploadedFile ();} return instance ;} string url = "http://2.novelread.sinaapp.com/framework-sae/index.php? C = main & a = getPostBody "; private int lastErrCode = 0; // The latest error code byte [] tmpBuf = new byte [BUF_LEN]; byte [] tmpBuf2 = new byte [BUF_LEN * 2]; public static final int post_progress_y y = 101; HttpURLConnection connection = null; public static final int HTTP_ARGUMENT_ERR =-1001; // HTTP parameter error public static final int HTTP_RESPONSE_EMPTY =-1002; // Http Response is // Emptypublic static final int HTTP_URL_ERR =-1003; // public static final int HTTP_GZIP_ERR =-1004; // public static final int HTTP_CANCELED =-1005; // public static final int HTTP_EXCEPTION =-1006 has been canceled for the current download; // private boolean bIsStop = false; protected Object objAbort = new Object (); private Handler mHandler = null; public static final int TIMEOUT = 30000; // TIMEOUT 30 seconds private static final int BUF_LEN = 512; // data buffer length public boo Lean doUploadPhoto (Context context, String filePathName, Handler handler) {boolean ret = false; File file = new File (filePathName); if (! File. exists () {return false;} FileInputStream fs = null; if (file! = Null) {try {fs = new FileInputStream (file);} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke. printStackTrace () ;}} if (file = null | fs = null) {return false;} mHandler = handler; ret = postWithoutResponse (context, url, fs, (int) file. length (); if (fs! = Null) {try {fs. close (); fs = null;} catch (Exception e) {}} return ret;} public Boolean postWithoutResponse (Context context, final String strUrl, InputStream dataStream, int iStreamLen ){// IStreamLen is an uppercase object in bytes.If (TextUtils. isEmpty (strUrl) | dataStream = null | iStreamLen <= 0) {lastErrCode = HTTP_ARGUMENT_ERR; return false;} URL postUrl = null; try {postUrl = new URL (strUrl);} catch (MalformedURLException ex) {Log. e ("HttpUtil", "get MalformedURL", ex); lastErrCode = HTTP_URL_ERR; return false;} bIsStop = false; InputStream input = null; DataOutputStream ds = null; byteArrayOutputStream byteOutStream = null; Ht TpURLConnection conn = null; byte [] outData = null; try {if (bIsStop) {lastErrCode = HTTP_CANCELED; return false;} conn = getConnection (context, postUrl); connection = conn; conn. setRequestMethod ("POST"); conn. setDoInput (true); conn. setDoOutput (true); conn. setConnectTimeout (TIMEOUT * 3); conn. setReadTimeout (TIMEOUT * 3); conn. setRequestProperty ("Connection", "Keep-Alive"); conn. setRequestProperty ("Content-Typ E "," application/octet-stream "); conn. setRequestProperty ("Content-Length", String. valueOf (iStreamLen); if (bIsStop) {lastErrCode = HTTP_CANCELED; return false;} // get the wifi statusWifiManager wifiManager = (WifiManager) context. getSystemService (Context. WIFI_SERVICE); boolean bWifiEnable = (wifiManager. getWifiState () = WifiManager. WIFI_STATE_ENABLED); // byte [] data = new byte [BUF_LEN]; ds = new DataO UtputStream (conn. getOutputStream (); int len = 0; int postLen = 0; int nMaxProgress = bWifiEnable? 80: 40; while (! BIsStop & (len = dataStream. read (tmpBuf2 ))! =-1 )){// If the value of bIsStop is true, the process of writing a file to the server will be terminated.Ds. write (tmpBuf2, 0, len); ds. flush (); // waiting for uploading the image file to optimize the progress // bar when using uplsif (! BWifiEnable) {Thread. sleep (30);} // configure y post progresspostLen + = len; if (mHandler! = Null) {Message msg = new Message (); msg. what = POST_PROGRESS_NOTIFY;Msg. arg1 = (postLen * nMaxProgress)/iStreamLen; // postLen indicates the size of the uploaded file,
NMaxProgress increases the progress bar
MHandler. sendMessage (msg) ;}}if (bIsStop) {lastErrCode = HTTP_CANCELED; return false;} ds. flush (); // waiting for uploading the image file to optimize the progress bar // when using uplsif (! BWifiEnable) {postLen = 0; while (postLen <iStreamLen) {Thread. sleep (30); // configure y post progresspostLen + = tmpBuf2.length; if (mHandler! = Null) {Message msg = new Message (); msg. what = POST_PROGRESS_NOTIFY; msg. arg1 = (postLen * 35)/iStreamLen + 50; mHandler. sendMessage (msg) ;}}// waiting for the server's responseInputStream is = conn. getInputStream (); int ch; StringBuffer res = new StringBuffer (); while (ch = is. read ())! =-1) {res. append (char) ch);} if (mHandler! = Null) {Message msg = new Message (); msg. what = POST_PROGRESS_NOTIFY; msg. arg1 = 90; mHandler. sendMessage (msg);} return true;} catch (Exception ex) {Log. e ("HttpUtil", "post", ex); if (bIsStop) {lastErrCode = HTTP_CANCELED;} else {lastErrCode = HTTP_EXCEPTION;} return false ;} finally {try {outData = null; if (input! = Null) {input. close (); input = null;} // if (ds! = Null) {// ds. close (); // ds = null; //} try {ds. close (); ds = null;} catch (Exception e) {// TODO: handle exception} if (conn! = Null) {conn. disconnect (); conn = null;} if (byteOutStream! = Null) {byteOutStream. close (); byteOutStream = null;} if (bIsStop ){// If the termination is complete, the cancel method will be notified.Synchronized (objAbort) {objAbort. Y () ;}} if (mHandler! = Null) {Message msg = new Message (); msg. what = POST_PROGRESS_NOTIFY; msg. arg1 = 100; mHandler. sendMessage (msg) ;}} catch (Exception ex) {Log. e ("HttpUtil", "post finally", ex) ;}} public synchronized void cancel () {try {BIsStop = true; // the user clicks the cancel button, and the value of bIsStop is true.If (connection! = Null) {connection. disconnect (); connection = null ;}Synchronized (objAbort) {// only
PostWithoutResponse is executed to finally to notify you that this function can be executed.
ObjAbort. wait (50) ;}} catch (Exception ex) {Log. v ("HttpUtil", "canel", ex) ;}} private HttpURLConnection getConnection (Context context, URL url) throws Exception {String [] apnInfo = null; wifiManager wifiManager = (WifiManager) context. getSystemService (Context. WIFI_SERVICE); int wifiState = wifiManager. getWifiState (); HttpURLConnection conn = null;Conn = (HttpURLConnection) url. openConnection (); // obtain the http ConnectionReturn conn ;}}

Code in http://download.csdn.net/detail/baidu_nod/7735511