大文件断点续传
1.服务包
1.1 DBOpenHelper.java
package cn.itcast.service;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class DBOpenHelper extends SQLiteOpenHelper {
public DBOpenHelper(Context context) {
super(context, "upload.db", null, 1);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("CREATE TABLE uploadlog (_id integer primary key autoincrement, uploadfilepath varchar(100), sourceid varchar(10))");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS uploadlog");
onCreate(db);
}
}
2.UploadLogService.java
package cn.itcast.service;
import java.io.File;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
public class UploadLogService {
private DBOpenHelper dbOpenHelper;
public UploadLogService(Context context){
this.dbOpenHelper = new DBOpenHelper(context);
}
public void save(String sourceid, File uploadFile){
SQLiteDatabase db = dbOpenHelper.getWritableDatabase();
db.execSQL("insert into uploadlog(uploadfilepath, sourceid) values(?,?)",
new Object[]{uploadFile.getAbsolutePath(),sourceid});
}
public void delete(File uploadFile){
SQLiteDatabase db = dbOpenHelper.getWritableDatabase();
db.execSQL("delete from uploadlog where uploadfilepath=?", new Object[]{uploadFile.getAbsolutePath()});
}
public String getBindId(File uploadFile){
SQLiteDatabase db = dbOpenHelper.getReadableDatabase();
Cursor cursor = db.rawQuery("select sourceid from uploadlog where uploadfilepath=?",
new String[]{uploadFile.getAbsolutePath()});
if(cursor.moveToFirst()){
return cursor.getString(0);
}
return null;
}
}
2.工具包
StreamTool.java
package cn.itcast.utils;
import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.PushbackInputStream;
public class StreamTool { public static void save(File file, byte[] data) throws Exception { FileOutputStream outStream = new FileOutputStream(file); outStream.write(data); outStream.close(); } public static String readLine(PushbackInputStream in) throws IOException { char buf[] = new char[128]; int room = buf.length; int offset = 0; int c; loop: while (true) { switch (c = in.read()) { case -1: case '\n': break loop; case '\r': int c2 = in.read(); if ((c2 != '\n') && (c2 != -1)) in.unread(c2); break loop; default: if (--room < 0) { char[] lineBuffer = buf; buf = new char[offset + 128]; room = buf.length - offset - 1; System.arraycopy(lineBuffer, 0, buf, 0, offset); } buf[offset++] = (char) c; break; } } if ((c == -1) && (offset == 0)) return null; return String.copyValueOf(buf, 0, offset); } /** * 读取流 * @param inStream * @return 字节数组 * @throws Exception */ public static byte[] readStream(InputStream inStream) throws Exception{ ByteArrayOutputStream outSteam = new ByteArrayOutputStream(); byte[] buffer = new byte[1024]; int len = -1; while( (len=inStream.read(buffer)) != -1){ outSteam.write(buffer, 0, len); } outSteam.close(); inStream.close(); return outSteam.toByteArray(); } }
3.上传文件程序代码
3.1 monitor.java
package cn.king.monitor;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.View;
import android.widget.Button;
public class Monitor extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_monitor);
Button filemanager = (Button) findViewById(R.id.fileManager);
filemanager.setOnClickListener(new Button.OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent();
intent.setClass(Monitor.this, FileManager.class);
/* 调用一个新的Activity */
startActivity(intent);
}
});
}
/*@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.monitor, menu);
return true;
}*/
}
3.2 FileManager.java
package cn.king.monitor;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnCreateContextMenuListener;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
public class FileManager extends Activity {
ListView listView;
TextView textView;
// 记录当前的父文件夹
File currentParent;
// 记录当前路径下的所有文件的文件数组
File[] currentFiles;
public int MID;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.array_file);
listView = (ListView) findViewById(R.id.list);
textView = (TextView) findViewById(R.id.path);
// 获取系统的SD卡的目录
File root = new File("/mnt/sdcard/");
// 如果 SD卡存在
if (root.exists()) {
currentParent = root;
currentFiles = root.listFiles();
// 使用当前目录下的全部文件、文件夹来填充ListView
inflateListView(currentFiles);
}
// 为ListView的列表项的单击事件绑定监听器
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// 用户单击了文件，直接返回，不做任何处理
if (currentFiles[position].isFile())
return;
// 获取用户点击的文件夹下的所有文件
File[] tmp = currentFiles[position].listFiles();
if (tmp == null || tmp.length == 0) {
Toast.makeText(FileManager.this, "当前路径不可访问或该路径下没有文件",
Toast.LENGTH_SHORT).show();
} else {
// 获取用户单击的列表项对应的文件夹，设为当前的父文件夹
currentParent = currentFiles[position]; // ②
// 保存当前的父文件夹内的全部文件和文件夹
currentFiles = tmp;
// 再次更新ListView
inflateListView(currentFiles);
}
}
});
ItemOnLongClick1();
}
// 为ListView的列表项的長按事件绑定监听器
private void ItemOnLongClick1() {
// 注：setOnCreateContextMenuListener是与下面onContextItemSelected配套使用的
listView.setOnCreateContextMenuListener(new OnCreateContextMenuListener() {
@Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
// TODO Auto-generated method stub
menu.add(0, 0, 0, "播放");
menu.add(0, 1, 0, "删除");
menu.add(0, 2, 0, "上传");
}
});
}
// 长按菜单响应函数
public boolean onContextItemSelected(MenuItem item) {
AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) item
.getMenuInfo();
MID = (int) info.id;// 这里的info.id对应的就是数据库中_id的值
switch (item.getItemId()) {
case 0:
// 添加操作
Toast.makeText(FileManager.this, "添加", Toast.LENGTH_SHORT).show();
break;
case 1:
// 删除操作
break;
case 2:// 上传
int position = 0;
//创建一个Bundle
//String title = currentFiles[BIND_AUTO_CREATE].getName().toString();
String title = currentFiles[position].getName().toString();
Bundle bundle = new Bundle();
bundle.putString("title", title);
//创建一个Intent
Intent intent = new Intent();
intent.setClass(FileManager.this, UploadActivity.class);
intent.putExtras(bundle);
//调用一个新的Activity
startActivity(intent);
default:
break;
}
return super.onContextItemSelected(item);
}
private void inflateListView(File[] files) // ①
{
// 创建一个List集合，List集合的元素是Map
List<Map<String, Object>> listItems = new ArrayList<Map<String, Object>>();
for (int i = 0; i < files.length; i++) {
Map<String, Object> listItem = new HashMap<String, Object>();
// 如果当前File是文件夹，使用folder图标；否则使用file图标
if (files[i].isDirectory()) {
listItem.put("icon", R.drawable.folder);
} else {
listItem.put("icon", R.drawable.file);
}
listItem.put("fileName", files[i].getName());
// 添加List项
listItems.add(listItem);
}
// 创建一个SimpleAdapter
SimpleAdapter simpleAdapter = new SimpleAdapter(this, listItems,
R.layout.array_line, new String[] { "icon", "fileName" },
new int[] { R.id.icon, R.id.file_name });
// 为ListView设置Adapter
listView.setAdapter(simpleAdapter);
try {
textView.setText("当前路径为：" + currentParent.getCanonicalPath());
} catch (IOException e) {
e.printStackTrace();
}
}
}
3.3 UploadActivity.java
package cn.king.monitor;
import java.io.File;
import java.io.OutputStream;
import java.io.PushbackInputStream;
import java.io.RandomAccessFile;
import java.net.Socket;
import cn.itcast.service.UploadLogService;
import cn.itcast.utils.StreamTool;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;
public class UploadActivity extends Activity {
private TextView filenameText , resulView;
private ProgressBar uploadbar;
private UploadLogService logService;
private Handler handler = new Handler(){
@Override
public void handleMessage(Message msg) {
int length = msg.getData().getInt("size");
uploadbar.setProgress(length);
float num = (float)uploadbar.getProgress()/(float)uploadbar.getMax();
int result = (int)(num * 100);
resulView.setText(result+ "%");
if(uploadbar.getProgress()==uploadbar.getMax()){
Toast.makeText(UploadActivity.this, R.string.success, 1).show();
}
}
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.array_upload);
Intent intent = getIntent();
String title = (String)intent.getStringExtra("title");
logService = new UploadLogService(this);
filenameText = (TextView)this.findViewById(R.id.filename);
uploadbar = (ProgressBar) this.findViewById(R.id.uploadbar);
resulView = (TextView)this.findViewById(R.id.result);
filenameText.setText(title);
Button button =(Button)this.findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String filename = filenameText.getText().toString();
if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
File uploadFile = new File(Environment.getExternalStorageDirectory(), filename);
if(uploadFile.exists()){
uploadFile(uploadFile);
}else{
Toast.makeText(UploadActivity.this, R.string.filenotexsit, Toast.LENGTH_LONG).show();
}
}else{
Toast.makeText(UploadActivity.this, R.string.sdcarderror, Toast.LENGTH_LONG).show();
}
}
});
}
/**
* 上传文件
* @param uploadFile
*/
private void uploadFile(final File uploadFile) {
new Thread(new Runnable() {
@Override
public void run() {
try {
uploadbar.setMax((int)uploadFile.length());
String souceid = logService.getBindId(uploadFile);
String head = "Content-Length="+ uploadFile.length() + ";filename="+ uploadFile.getName()
+ ";sourceid="+(souceid==null? "" : souceid)+"\r\n";
Socket socket = new Socket("172.18.168.195", 8989);
OutputStream outStream = socket.getOutputStream();
outStream.write(head.getBytes());
PushbackInputStream inStream = new PushbackInputStream(socket.getInputStream());
String response = StreamTool.readLine(inStream);
String[] items = response.split(";");
String responseid = items[0].substring(items[0].indexOf("=")+1);
String position = items[1].substring(items[1].indexOf("=")+1);
if(souceid==null){//代表原来没有上传过此文件，往数据库添加一条绑定记录
logService.save(responseid, uploadFile);
}
RandomAccessFile fileOutStream = new RandomAccessFile(uploadFile, "r");
fileOutStream.seek(Integer.valueOf(position));
byte[] buffer = new byte[1024];
int len = -1;
int length = Integer.valueOf(position);
while( (len = fileOutStream.read(buffer)) != -1){
outStream.write(buffer, 0, len);
length += len;
Message msg = new Message();
msg.getData().putInt("size", length);
handler.sendMessage(msg);
}
fileOutStream.close();
outStream.close();
inStream.close();
socket.close();
if(length==uploadFile.length()) logService.delete(uploadFile);
} catch (Exception e) {
e.printStackTrace();
}
}
}).start();
}
}