I am currently writing a small application that shows the current song being played in my local pub, loading the XML file generated by last.fm.
The problem is this: when synchronizing with xml, it does not get the new version, but instead uses the first loaded xml again and again. In the meantime, opening this link in a random browser gives the correct results. Maybe caching or lazy downloading, I don't know. I also don't know if this is related to ION or not.
I have currently fixed this with some code that clears the entire cache from this application before downloading, and it works very well, but since I probably want to expand the application, I will have to find another way to solve this problem.
My code is:
public class MainActivity extends Activity implements OnClickListener {
private final static String nonXML = {the url to my xml-file}
private String resultXml;
private TextView artistTextView, songTextView, albumTextView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
artistTextView = (TextView) findViewById(R.id.artistTextView);
songTextView = (TextView) findViewById(R.id.songTextView);
albumTextView = (TextView) findViewById(R.id.albumTextView);
Button mainButton = (Button) findViewById(R.id.mainButton);
mainButton.setOnClickListener(this);
}
@Override
protected void onResume() {
super.onResume();
update();
}
@Override
public void onClick(View v) {
update();
}
private void update() {
deleteCache(this);
getXML();
XMLToClass convertor = new XMLToClass();
NonPlaylist non = convertor.convert(resultXml);
artistTextView.setText(non.getArtist());
songTextView.setText(non.getSong());
albumTextView.setText(non.getAlbum());
}
private void getXML() {
try {
Ion.with(getBaseContext(), nonXML)
.asString()
.setCallback(new FutureCallback<String>() {
@Override
public void onCompleted(Exception e, String result) {
resultXml = result;
}
}).get();
} catch (InterruptedException e) {
e.printStackTrace();
} catch (ExecutionException e) {
e.printStackTrace();
}
}
public static void deleteCache(Context context) {
try {
File dir = context.getCacheDir();
if (dir != null && dir.isDirectory()) {
deleteDir(dir);
}
} catch (Exception e) {}
}
public static boolean deleteDir(File dir) {
if (dir != null && dir.isDirectory()) {
String[] children = dir.list();
for (int i = 0; i < children.length; i++) {
boolean success = deleteDir(new File(dir, children[i]));
if (!success) {
return false;
}
}
}
return dir.delete();
}
}