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POasyncantask with asyntask with background process
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  1. POasyncantask with asyntask with background process
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    copied!<p>The following code gives a Force Close Error</p> <pre><code> public class MainActivity extends Activity { Button b1; TextView tv; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); b1 = (Button) findViewById(R.id.button1); tv = (TextView) findViewById(R.id.textView1); b1.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub new loadSomeStuff().execute(); } }); } public class loadSomeStuff extends AsyncTask&lt;String, Integer, String&gt; { ProgressDialog dlg; protected void onPreExecute() { dlg = new ProgressDialog(MainActivity.this); dlg.setProgressStyle(ProgressDialog.STYLE_SPINNER); dlg.setMessage("Loding Please Wait"); dlg.setMax(100); dlg.show(); } @Override protected String doInBackground(String... params) { // TODO Auto-generated method stub for (int i = 0; i &lt; 20; i++) { try { Document document = new Document(); PdfWriter.getInstance(document, new FileOutputStream( Environment.getExternalStorageDirectory() + "/" + "/bg.pdf")); document.open(); document.add(new Paragraph("hie")); Toast.makeText(getApplicationContext(), "Generated", Toast.LENGTH_LONG).show(); document.close(); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (DocumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } publishProgress(5); try { Thread.sleep(88); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } dlg.dismiss(); return null; } protected void onProgressUpdated(Integer... progress) { dlg.incrementProgressBy(progress[0]); } protected void onPostExecute(String result) { tv.setText("DONE"); } } </code></pre>
 

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