Android程序研发源码Android 文件断点续传源码.rar

package cn.itcast.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.FileService; 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.util.Log; 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 static final String TAG = "UploadActivity"; private EditText filenameText; private TextView resultVew; private ProgressBar progressBar; private FileService fileService; private Handler handler = new Handler(){ @Override public void handleMessage(Message msg) { int size = msg.getData().getInt("size"); progressBar.setProgress(size); float result = (float)progressBar.getProgress()/ (float)progressBar.getMax(); int p = (int)(result*100); resultVew.setText(p+"%"); if(progressBar.getProgress()==progressBar.getMax()){ Toast.makeText(UploadActivity.this, R.string.success, 1).show(); } } }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); fileService = new FileService(this); filenameText = (EditText) this.findViewById(R.id.filename); resultVew = (TextView) this.findViewById(R.id.result); progressBar = (ProgressBar) this.findViewById(R.id.uploadbar); 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); uploadfile(uploadFile); }else{ Toast.makeText(UploadActivity.this, R.string.sdcarderror, 1).show(); } } }); } private void uploadfile(final File file){ new Thread(new Runnable() { @Override public void run() { try { progressBar.setMax((int)file.length()); String sourceid = fileService.find(file); Socket socket = new Socket("192.168.1.157", 7878); OutputStream outStream = socket.getOutputStream(); String head = "Content-Length="+ file.length() + ";filename="+ file.getName() + ";sourceid="+ (sourceid==null? "" : sourceid)+"\r\n"; outStream.write(head.getBytes()); PushbackInputStream inStream = new PushbackInputStream(socket.getInputStream()); String response = StreamTool.readLine(inStream); System.out.println(response); String[] items = response.split(";"); String id = items[0].substring(items[0].indexOf("=")+1);//服务返回绑定该文件的资源id String position = items[1].substring(items[1].indexOf("=")+1); if(sourceid==null) fileService.save(file, id); RandomAccessFile fileOutStream = new RandomAccessFile(file, "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==file.length()) fileService.delete(file); } catch (Exception e) { Log.e(TAG, e.toString()); } } }).start(); } }