使用dataoutputstream的write方法实现进度条 [英] Progress bar implementation with write method of dataoutputstream

问题描述

是否可以在以下代码中加入水平进度条?我在想 os AsyncTask 但后来我意识到，我无法将整数值传递给 doInBackground() 中的 ProgressUpdate() 方法.请帮忙！

Is it possible to incorporate a horizontal progress bar in the following code? I was thinking os AsyncTask but then I realized, I can't pass an integer value to ProgressUpdate() method inside doInBackground(). Please help!

public void sendFileDOS() throws FileNotFoundException {
    runOnUiThread( new Runnable() {
          @Override
          public void run() {
              registerLog("Sending. . . Please wait. . .");
          }
        });
    final long startTime = System.currentTimeMillis();
    final File myFile= new File(filePath); //sdcard/DCIM.JPG
    byte[] mybytearray = new byte[(int) myFile.length()];
    FileInputStream fis = new FileInputStream(myFile);  
    BufferedInputStream bis = new BufferedInputStream(fis);
    DataInputStream dis = new DataInputStream(bis);
    try {
        dis.readFully(mybytearray, 0, mybytearray.length);
        OutputStream os = socket.getOutputStream();
        //Sending file name and file size to the server  
        DataOutputStream dos = new DataOutputStream(os);     
        dos.writeUTF(myFile.getName());     
        dos.writeLong(mybytearray.length);     
        dos.write(mybytearray, 0, mybytearray.length);     
        dos.flush();

    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    runOnUiThread( new Runnable() {
          @Override
          public void run() {
              long estimatedTime = (System.currentTimeMillis() - startTime)/1000;
              registerLog("File successfully sent");
              registerLog("File size: "+myFile.length()/1000+" KBytes");
              registerLog("Elapsed time: "+estimatedTime+" sec. (approx)");
              registerLog("Server stopped. Please restart for another session.");
              final Button startServerButton=(Button)findViewById(R.id.button1);
              startServerButton.setText("Restart file server");
          }
        });
}

推荐答案

您可以使用 AsyncTask 来获得这样的进度条:

You can use AsyncTask that gets a progress bar like that:

public abstract class BaseTask extends AsyncTask<String, Integer, String> 
{   
    private ProgressBar    m_progressBar;

    protected BaseTask(ProgressBar p)
    {
        m_progressBar = p;
    }

    @Override
    protected void onPreExecute()
    {   
        if (m_progressBar != null)
        {
            m_progressBar.setProgress(0);
        }
    }

    @Override
    protected void onPostExecute(String result)
    {   
        if (m_progressBar != null)
            m_progressBar.setVisibility(ProgressBar.GONE);
    }

    public void OnProgress(int prog)
    {
        if (m_progressBar != null)
        {
            m_progressBar.setProgress(prog);
        }
    }
}

要在您的 xml 中添加进度条:

To add a progress bar in your xml:

<ProgressBar
 android:id="@+id/progressBar"
 style="?android:attr/progressBarStyleHorizontal"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_margin="10dp" />

在代码中初始化进度条:

To initialize the progress bar in your code:

ProgressBar p = (ProgressBar)findViewById(R.id.progressBar);
p.setVisibility(ProgressBar.VISIBLE);
p.setMax(100);

这篇关于使用dataoutputstream的write方法实现进度条的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！