通过TCPIP协议(socket)实现断点续传上传-----android客户端

转载自：传智播客教程

以下为android端代码，服务端请查看：http://www.cnblogs.com/yangj55/articles/5408243.html

UploadActivity.java

package cn.itcast.video.upload;

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.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.EditText;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;

public class UploadActivity extends Activity {
    private EditText filenameText;
    private TextView 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.main);
        
        logService = new UploadLogService(this);
        filenameText = (EditText)this.findViewById(R.id.filename);
        uploadbar = (ProgressBar) this.findViewById(R.id.uploadbar);
        resulView = (TextView)this.findViewById(R.id.result);
        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, 1).show();
                    }
                }else{
                    Toast.makeText(UploadActivity.this, R.string.sdcarderror, 1).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("10.10.97.51", 7878);
                    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();
    }
}

 

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;
    }
}

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);        
    }

}

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/filename"
    />
    
    <EditText  
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:text="QQWubiSetup.exe"
        android:id="@+id/filename"
        />
        
    <Button  
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:text="@string/button"
        android:id="@+id/button"
        />
    <ProgressBar 
            android:layout_width="fill_parent" 
            android:layout_height="20px"
            style="?android:attr/progressBarStyleHorizontal"
            android:id="@+id/uploadbar"
            /> 
    <TextView  
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:gravity="center"
        android:id="@+id/result"
        />    
</LinearLayout>