I am fairly new to Android development so I thought I would start off with a basic app. When a button is pressed, it copies a file to the location written in the code (see my code below). When I press the install button and the file is copied to its location, I want a toast message to display "Successfully Installed or Error while copying file". How would I implement this?

```
public class TrialActivity extends Activity {

private ProgressDialog progressDialog;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    runDialog(5);
}

private void runDialog(final int seconds)
{
    progressDialog = ProgressDialog.show(this, "Please Wait...", "unpacking patch in progress");

    new Thread(new Runnable(){
        public void run(){
            try {
                Thread.sleep(seconds * 1000);
                progressDialog.dismiss();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }).start();

    ((Button)findViewById(R.id.button1)).setOnClickListener(new View.OnClickListener()
    {
      public void onClick(View paramView)
      {

      }

   {

              InputStream in = null;
              OutputStream out = null;
  String filename="savegame.bin";           
  try {    

                in = getResources().openRawResource(R.raw.savegame);
                out = new FileOutputStream("/sdcard/Android/data/files/" + filename);
                copyFile(in, out);
                in.close();
                in = null;
                out.flush();
                out.close();
                out = null;
              } catch(Exception e) {
                  Log.e("tag", e.getMessage());
              }       

      }
      private void copyFile(InputStream in, OutputStream out) throws IOException {
          byte[] buffer = new byte[1024];
          int read;
          while((read = in.read(buffer)) != -1){
            out.write(buffer, 0, read);

          }
      }
      }
    );
  }

}

```