Android multi-thread download tool core code sharing, android download Tool

Android multi-thread download tool core code sharing, android download Tool

First, we will share with you the core multi-thread download class:

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The following is the logic code of the interface:

1 package com. example. urltest; 2 3 import android. app. activity; 4 import android. app. alertDialog; 5 import android. app. progressDialog; 6 import android. content. dialogInterface; 7 import android. OS. bundle; 8 import android. OS. message; 9 import android. view. view; 10 import android. view. view. onClickListener; 11 import android. widget. button; 12 import android. widget. editText; 13 import android. widget. P RogressBar; 14 import android. widget. textView; 15 import android. widget. toast; 16 17 import java. io. IOException; 18 import java. util. timer; 19 import java. util. timerTask; 20 21 public class MultiThreadDown extends Activity {22 EditText url, target; 23 Button downButton; 24 ProgressBar bar; 25 ProgressDialog progre; 26 View downView; 27 DownUtil downUtil; 28 private int mDownStatus; 29 pri Vate int threadNum = 6; // default thread count 30 android. OS. handler handler = new android. OS. handler () {31 32 @ Override 33 public void handleMessage (Message msg) {34 if (msg. what = 0x123) {35 bar. setProgress (mDownStatus); 36 if (mDownStatus> = 100) {37 Toast. makeText (MultiThreadDown. this, "download completed", Toast. LENGTH_SHORT ). show (); 38} 39 // Log. I ("csx", "" + mDownStatus); 40 41} 42} 43 44}; 45 46 @ Override 47 protected void onCreate (Bundle savedInstanceState) {48 49 super. onCreate (savedInstanceState); 50 setContentView (R. layout. layout_down); 51 url = (EditText) findViewById (R. id. url); 52 53 downButton = (Button) findViewById (R. id. down); 54 bar = (ProgressBar) findViewById (R. id. bar); 55 progressDialog = new ProgressDialog (this); 56 progressDialog. setTitle ("try to connect"); 57 progressDialog. setMessage ("connected. .. "); 58 downButton. setOnClickListener (new DownButtonOnClickListener (); 59 60} 61 62 private class DownButtonOnClickListener implements OnClickListener {63 64 EditText targetFilePath, fileName; 65 TextView fileSize; 66 Thread connectionThread; 67 68 public Thread instanceOfConnectionThread () {69 return new Thread () {70 71 @ Override 72 public void run () {73 try {74 downUtil. getFileInformatio N (); 75 76} catch (IOException e1) {77 e1.printStackTrace (); 78} 79 80} 81 82 }; 83} 84 85 @ Override 86 public void onClick (View v) {87 88 String urlPath = url. getText (). toString (); 89 if (urlPath = null | urlPath. equals ("") {90 return; 91} 92 progressDialog. show (); 93 downUtil = new DownUtil (urlPath, threadNum); 94 connectionThread = instanceOfConnectionThread (); 95 connectionThread. st Art (); 96 97 int connectionNum = 3; 98 while (! DownUtil. isGetFileInformation () & connectionNum> 0) {// loop request connection. if the connection fails after three times, exit 99 if (! ConnectionThread. isAlive () {100 connectionThread = null; 101 connectionThread = instanceOfConnectionThread (); 102 connectionThread. start (); 103 connectionNum --; 104} 105 106} 107 progressDialog. cancel (); 109 if (! DownUtil. isGetFileInformation () {110 Toast. makeText (MultiThreadDown. this, "request failed! ", Toast. LENGTH_SHORT ). show (); 111 return; 112} 113 downView = getLayoutInflater (). inflate (R. layout. layout_download_view, null); 114 targetFilePath = (EditText) downView. findViewById (R. id. editText_target_path); 115 fileName = (EditText) downView. findViewById (R. id. editText_file_name); 116 fileSize = (TextView) downView. findViewById (R. id. textView_file_size); 117 targetFilePath. setText (downUtil. getDefaultTa RgetPath (); 118 fileName. setText (downUtil. getFileName (); 119 fileSize. append ("" + (double) downUtil. getFileSize ()/1024 + "k"); 120 121 new AlertDialog. builder (MultiThreadDown. this ). setView (downView) 122. setPositiveButton ("OK", new DialogInterface. onClickListener () {123 124 @ Override125 public void onClick (DialogInterface dialog, int which) {126 if (! DownUtil. isGetFileInformation () {127 dialog. dismiss (); 128 return; 129} 130 final String path = targetFilePath. getText (). toString (); 131 final String name = fileName. getText (). toString (); 132 133 new Thread () {134 135 @ Override136 public void run () {137 try {138 downUtil. download (path, name); 139} catch (IOException e) {140 // TODO Auto-generated catch block141 e. printStackTrace (); 142} 143 144 final T Extends timer = new Timer (); 145 TimerTask task = new TimerTask () {146 147 @ Override148 public void run () {149 150 mDownStatus = (int) (downUtil. getCompleteRate () * 100); 151 handler. sendEmptyMessage (0x123); 152 if (mDownStatus> = 100) {153 timer. cancel (); 154} 155 156} 157}; 158 timer. schedule (task, 0,100); 159 160} 161 162 }. start (); 163 164} 165 }). setNegativeButton ("cancel", null) 166. setTitle (downUtil. is GetFileInformation ()? "Link available": "link unavailable"). show (); 167 168} 169} 170 171}

Layout_down.xml

1 <? Xml version = "1.0" encoding = "UTF-8"?> 2 <LinearLayout xmlns: android = "http://schemas.android.com/apk/res/android" 3 android: layout_width = "match_parent" 4 android: layout_height = "match_parent" 5 android: orientation = "vertical"> 6 7 <ScrollView 8 android: id = "@ + id/scrollView1" 9 android: layout_width = "match_parent" 10 android: layout_height = "wrap_content"> 11 12 <LinearLayout13 android: layout_width = "match_parent" 14 android: layout_height = "matc H_parent "15 android: orientation =" vertical "> 16 17 <TextView18 android: layout_width =" match_parent "19 android: layout_height =" wrap_content "20 android: text = "URL of the resource to be downloaded:"/> 21 22 <EditText23 android: id = "@ + id/url" 24 android: layout_width = "match_parent" 25 android: layout_height = "wrap_content" 26 android: text = "Enter URL here"/> 27 28 <Button29 android: id = "@ + id/down" 30 android: layout_width = "match_parent" 31 android: Layout_height = "wrap_content" 32 android: text = "Download"/> 33 <! -- Define a horizontal progress bar to display the download progress --> 34 35 <ProgressBar36 android: id = "@ + id/bar" 37 style = "? Android: attr/progressBarStyleHorizontal "38 android: layout_width =" match_parent "39 android: layout_height =" wrap_content "40 android: max = "100"/> 41 </LinearLayout> 42 </ScrollView> 43 44 </LinearLayout>

Below is the layout of the download option dialog: layout_download_view.xml

1 <? Xml version = "1.0" encoding = "UTF-8"?> 2 <LinearLayout xmlns: android = "http://schemas.android.com/apk/res/android" 3 android: layout_width = "match_parent" 4 android: layout_height = "match_parent" 5 android: orientation = "vertical"> 6 7 <TextView 8 android: id = "@ + id/textView1" 9 android: layout_width = "wrap_content" 10 android: layout_height = "wrap_content" 11 android: text = "Download path:"/> 12 13 <EditText14 android: id = "@ + id/editText_target_path" 15 android: layout_width = "match_parent" 16 android: layout_height = "wrap_content" 17 android: EMS = "10"> 18 19 <requestFocus/> 20 </EditText> 21 22 <TextView23 android: id = "@ + id/textView2" 24 android: layout_width = "wrap_content" 25 android: layout_height = "wrap_content" 26 android: text = "File Name: "/> 27 28 <EditText29 android: id =" @ + id/editText_file_name "30 android: layout_width =" match_parent "31 android: layout_height =" wrap_content "32 android: maxLines = "1" 33 android: EMS = "10"/> 34 35 <TextView36 android: id = "@ + id/textView_file_size" 37 android: layout_width = "wrap_content" 38 android: layout_height = "wrap_content" 39 android: text = "file size:"/> 40 41 </LinearLayout>

Enter the URL and click Download. In the dialog box that appears, enter the path and file name and click OK to start download.