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POCreating multiple threads to achieve ftp download and display in imageview
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  1. POCreating multiple threads to achieve ftp download and display in imageview
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    copied!<p>The following code executes a function that retrieves a file via ftp and then displays it in an imageview. Since I'm using the main thread the UI locks up, somebody tells me I can use asynctask to make this work but I can't figure it out :&lt;</p> <p>Is anybody familiar with this that could offer me some guidance?</p> <pre><code>package hhh.ggg; import android.app.Activity; import android.app.AlertDialog; import android.os.Bundle; import android.os.Handler; import java.io.File; import android.app.Activity; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.os.Bundle; import android.widget.ImageView; import android.widget.TextView; //import it.sauronsoftware.ftp4j.FTPClient; import it.sauronsoftware.ftp4j.*; public class hhh extends Activity { /** Called when the activity is first created. */ FTPClient ftp; String host = "ipofFTPserver"; final Handler mHandler = new Handler(); final Runnable mUpdateResults = new Runnable() { public void run() { updateResultsInUi(); } }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); startLongRunningOperation(); } protected void startLongRunningOperation() { // Fire off a thread to do some work that we shouldn't do directly in the UI thread Thread t = new Thread() { public void run() { try { ftp = new FTPClient(); ftp.connect(host); ftp.login("username", "password"); ftp.changeDirectory("public_ftp"); ftp.download("test.jpg", new java.io.File("/sdcard/test.jpg")); } catch(Exception e) { } mHandler.post(mUpdateResults); } }; t.start(); } private void updateResultsInUi() { // Back in the UI thread -- update our UI elements based on the data in mResults TextView jpgName = (TextView)findViewById(R.id.jpgname); ImageView jpgView = (ImageView)findViewById(R.id.jpgview); String myJpgPath = "/sdcard/test.jpg"; jpgName.setText(myJpgPath); BitmapFactory.Options options = new BitmapFactory.Options(); options.inSampleSize = 2; Bitmap bm = BitmapFactory.decodeFile(myJpgPath, options); jpgView.setImageBitmap(bm); } } </code></pre>
 

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