下载 文件

public class MyAutoUpdate {public Activity activity = null;private static final String TAG = "AutoUpdate";private String currentFilePath = "";private String currentTempFilePath = "";private String strURL = "";private ProgressDialog dialog;// 构造方法public MyAutoUpdate(Activity activity) {this.activity = activity;}// 判断网络是不是连接public void check() {if (isNetworkAvailable(this.activity) == false) {return;}if (true) {// Check version.showUpdateDialog();}}public void setUrl(String strURL) {this.strURL = strURL;}// 判断网络连接方法public static boolean isNetworkAvailable(Context ctx) {try {ConnectivityManager cm = (ConnectivityManager) ctx.getSystemService(Context.CONNECTIVITY_SERVICE);NetworkInfo info = cm.getActiveNetworkInfo();return (info != null && info.isConnected());} catch (Exception e) {e.printStackTrace();return false;}}// 询问是否更新public void showUpdateDialog() {@SuppressWarnings("unused")AlertDialog alert = new AlertDialog.Builder(this.activity).setTitle("版本升级").setMessage("是否更新新版本?").setPositiveButton("更新", new DialogInterface.OnClickListener() {public void onClick(DialogInterface dialog, int which) {downloadTheFile(strURL);showWaitDialog();}}).setNegativeButton("取消", new DialogInterface.OnClickListener() {public void onClick(DialogInterface dialog, int which) {dialog.cancel();}}).show();alert.setCanceledOnTouchOutside(false);}// 弹出等待更新框public void showWaitDialog() {dialog = new ProgressDialog(activity);dialog.setMessage("正在更新...");dialog.setIndeterminate(true);dialog.setCancelable(true);dialog.show();}// 获取当前版本号码和名称public PackageInfo getCurrentVersion() {PackageInfo info = null;try {info = activity.getPackageManager().getPackageInfo(activity.getPackageName(), 0);} catch (NameNotFoundException e) {e.printStackTrace();}return info;}// 下载apk包private void downloadTheFile(final String strPath) {try {if (strPath.equals(currentFilePath)) {doDownloadTheFile(strPath);}currentFilePath = strPath;Runnable r = new Runnable() {public void run() {try {doDownloadTheFile(strPath);} catch (Exception e) {Log.e(TAG, e.getMessage(), e);}}};new Thread(r).start();} catch (Exception e) {e.printStackTrace();}}// 下载private void doDownloadTheFile(String strPath) throws Exception {Log.i(TAG, "getDataSource()");if (!URLUtil.isNetworkUrl(strPath)) {Log.i(TAG, "getDataSource() It's a wrong URL!");} else {URL myURL = new URL(strPath);URLConnection conn = myURL.openConnection();conn.connect();InputStream is = conn.getInputStream();if (is == null) {throw new RuntimeException("stream is null");}currentTempFilePath = Utils.getAppDir(this.activity) + "/xsbyb.apk";File myTempFile = new File(currentTempFilePath);currentTempFilePath = myTempFile.getAbsolutePath();FileOutputStream fos = new FileOutputStream(myTempFile);int count = 0;// byte buf[] = new byte[128];do {byte buf[] = new byte[128];int numread = is.read(buf);count += numread;if (numread == -1) {break;}fos.write(buf, 0, numread);fos.flush();buf = null;} while (true);Log.i(TAG, "getDataSource() Download  ok..." + count);dialog.cancel();dialog.dismiss();openFile(myTempFile);try {is.close();fos.close();} catch (Exception ex) {Log.e(TAG, "getDataSource() error: " + ex.getMessage(), ex);}}}// 打开文件private void openFile(File f) {Intent intent = new Intent();intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);intent.setAction(android.content.Intent.ACTION_VIEW);String type = getMIMEType(f);intent.setDataAndType(Uri.fromFile(f), type);activity.startActivity(intent);}// 删除文件public void delFile() {Log.i(TAG, "The TempFile(" + currentTempFilePath + ") was deleted.");File myFile = new File(currentTempFilePath);if (myFile.exists()) {myFile.delete();}}// 判断文件类型private String getMIMEType(File f) {String type = "";String fName = f.getName();String end = fName.substring(fName.lastIndexOf(".") + 1, fName.length()).toLowerCase();if (end.equals("m4a") || end.equals("mp3") || end.equals("mid")|| end.equals("xmf") || end.equals("ogg") || end.equals("wav")) {type = "audio";} else if (end.equals("3gp") || end.equals("mp4")) {type = "video";} else if (end.equals("jpg") || end.equals("gif") || end.equals("png")|| end.equals("jpeg") || end.equals("bmp")) {type = "image";} else if (end.equals("apk")) {type = "application/vnd.android.package-archive";} else {type = "*";}if (end.equals("apk")) {} else {type += "/*";}return type;}}

package com.llkj.utils;import java.io.File;import java.io.FileOutputStream;import java.io.InputStream;import java.net.URL;import java.net.URLConnection;import java.util.concurrent.ExecutorService;import java.util.concurrent.Executors;import android.app.Activity;import android.app.ProgressDialog;import android.content.Context;import android.os.Environment;import android.util.Log;import android.webkit.URLUtil;public class DownloadFile {private static final String TAG = "AutoUpdate";public static String currentTempFilePath = "";private String strUrl = "", name = "";private ExecutorService fixedThreadPool;private ProgressDialog dialog;private Context context;private DownLoadFileListener df;private String fileEx, fileNa;private boolean isChongFuDown = true;// 路径public DownloadFile(Context context, String strUrL, DownLoadFileListener df) {// TODO Auto-generated constructor stubthis.context = context;this.strUrl = strUrL;this.df = df;fileEx = strUrL.substring(strUrL.lastIndexOf(".") + 1, strUrL.length()).toLowerCase();fileNa = strUrL.substring(strUrL.lastIndexOf("/") + 1,strUrL.lastIndexOf("."));this.name = fileNa + "." + fileEx;if (fixedThreadPool == null) {fixedThreadPool = Executors.newFixedThreadPool(3);}}// 路径public DownloadFile(Context context, String strUrL,DownLoadFileListener df, String fileEx) {// TODO Auto-generated constructor stubthis.context = context;this.strUrl = strUrL;this.df = df;this.fileEx = fileEx;fileNa = strUrL.substring(strUrL.lastIndexOf("/") + 1,strUrL.lastIndexOf("."));this.name = fileNa + "." + fileEx;if (fixedThreadPool == null) {fixedThreadPool = Executors.newFixedThreadPool(3);}}// 寮瑰嚭绛夊緟鏇存柊妗?public void showWaitDialog() {dialog = new ProgressDialog(context);dialog.setMessage("正在下载...");dialog.setIndeterminate(true);dialog.setCancelable(true);dialog.show();}public void downloadTheFile() {showWaitDialog();fixedThreadPool.execute(new Runnable() {@Overridepublic void run() {try {doDownloadTheFile();} catch (Exception e) {Log.e(TAG, e.getMessage(), e);}}});}// 涓嬭浇private void doDownloadTheFile() throws Exception {Log.i(TAG, "getDataSource()");if (!URLUtil.isNetworkUrl(strUrl)) {Log.i(TAG, "getDataSource() It's a wrong URL!");} else {if (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())&& Environment.getExternalStorageDirectory().exists()) {currentTempFilePath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/" + name;} else {currentTempFilePath = ((Activity) context).getApplication().getFilesDir().getAbsolutePath()+ "/" + name;}File myTempFile = new File(currentTempFilePath);// 判断文件是否存在if (!myTempFile.exists() || isChongFuDown) {URL myURL = new URL(strUrl);URLConnection conn = myURL.openConnection();conn.connect();InputStream is = conn.getInputStream();if (is == null) {throw new RuntimeException("stream is null");}FileOutputStream fos = new FileOutputStream(myTempFile);int count = 0;// byte buf[] = new byte[128];do {byte buf[] = new byte[128];int numread = is.read(buf);count += numread;if (numread == -1) {break;}fos.write(buf, 0, numread);fos.flush();buf = null;} while (true);Log.i(TAG, "getDataSource() Download  ok..." + count);try {is.close();fos.close();} catch (Exception ex) {Log.e(TAG, "getDataSource() error: " + ex.getMessage(), ex);}}df.doDwonloadComeplete(currentTempFilePath);dialog.cancel();dialog.dismiss();}}public interface DownLoadFileListener {void doDwonloadComeplete(String path);}}