Android supports multiple file download classes and android file types.

Android supports multiple file download classes and android file types.

String directoryName = Environment. getExternalStorageDirectory (). toString () + "/filename"; // file storage path // input parameter: Context object, file storage path; DownloadTask downloadTask = new DownloadTask (this, mDownloadUrl, directoryName); new Thread (downloadTask ). start (); // start the thread to download

/// Download class public class DownloadTask implements Runnable {private long mDownloadedSize = 0; private long mTotalSize; private int mDownloadPercent; private String mLocalPath; private String mURL; private Context mContext; public DownloadTask (Context context, String url, String localPath) {this. mLocalPath = localPath; this. mURL = url; this. mContext = context ;}@ Override public void run () {download (); }; // Download method: protected boolean download () {File file = new File (mLocalPath); if (file. exists () {mDownloadedSize = file. length ();} else {mDownloadedSize = 0;} Log. d (TAG, "mURL," + mURL + "downloadedSize," + mDownloadedSize); HttpURLConnection httpConnection = null; URL url = null; try {url = new URL (mUpgradeURL ); httpConnection = (HttpURLConnection) url. openConnection (); mTotalSize = httpC Onnection. getContentLength (); Log. d (TAG, "totalSize," + mTotalSize); if (mDownloadedSize = mTotalSize) {/////// return true if it has been downloaded to the local device ;} else if (mDownloadedSize> mTotalSize) {if (! File. delete () {return false ;}} httpConnection. disconnect ();} catch (Exception e) {e. printStackTrace (); return false;} finally {try {if (httpConnection! = Null) {httpConnection. disconnect () ;}} catch (Exception e) {}} InputStream inStream = null; RandomAccessFile randomAccessFile = null; try {httpConnection = (HttpURLConnection) url. openConnection (); httpConnection. setRequestProperty ("Accept", "image/gif," + "image/jpeg," + "image/pjpeg," + "image/pjpeg, "+" application/x-shockwave-flash, "+" application/xaml + xml, "+" application/vnd. ms- Xpsdocument, "+" application/x-ms-xbap, "+" application/x-ms-application, "+" application/vnd. ms-excel, "+" application/vnd. ms-powerpoint, "+" application/msword, "+" */* "); httpConnection. setRequestProperty ("Accept-Language", "zh-CN"); httpConnection. setRequestProperty ("Referer", mUpgradeURL); httpConnection. setRequestProperty ("Charset", "UTF-8"); httpConnection. setRequestProperty ("Range ", "Bytes =" + mDownloadedSize + "-"); httpConnection. setRequestProperty ("Connection", "Keep-Alive"); inStream = httpConnection. getInputStream (); File saveFile = new File (mLocalPath); randomAccessFile = new RandomAccessFile (saveFile, "rwd"); randomAccessFile. seek (mDownloadedSize); int offset = 0; int count = 0; int perUnit = (int) mTotalSize/1024/100; byte [] buffer = new byte [1024]; while (offset = InStream. read (buffer, 0, 1024 ))! =-1) {randomAccessFile. write (buffer, 0, offset); count ++; if (count = perUnit & mDownloadedSize <mTotalSize) {mDownloadPercent = (int) (mDownloadedSize * 100/mTotalSize ); //// // download mDownloadPercent count = 0;} mDownloadedSize + = offset;} if (mDownloadedSize = mTotalSize) {// download completed} Log. d (TAG, "download finished. "); return true;} catch (Exception e) {e. printStackTrace (); retu Rn false;} finally {try {if (inStream! = Null) {inStream. close ();} if (httpConnection! = Null) {httpConnection. disconnect ();} if (randomAccessFile! = Null) {randomAccessFile. close () ;}} catch (Exception e ){}}}}

Android file type

APK
Put ("apk", "application/vnd. android. package-archive ");

Put ("atom", "application/atom + xml ");
Put ("xml", "application/atom + xml ");
Put ("json", "application/json ");
Put ("js", "application/javascript ");
Put ("ogg", "application/ogg ");

What file formats does Android support?

Download the simulator .. JAR. Many supported by NEC ..