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Android通过TCPIP协议实现断点续传下传实现

热度:31   发布时间:2016-05-01 11:38:45.0
Android通过TCPIP协议实现断点续传上传实现
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);			}}

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;	}}

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("192.168.1.100", 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();	}}

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();	}}

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