Mega Code Archive
Using Timer to do repeat task
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package app.test;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Timer;
import java.util.TimerTask;
import android.app.Activity;
import android.app.IntentService;
import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.ServiceConnection;
import android.os.AsyncTask;
import android.os.Binder;
import android.os.Bundle;
import android.os.IBinder;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
class MyIntentService extends IntentService {
public MyIntentService() {
super("MyIntentServiceName");
}
@Override
protected void onHandleIntent(Intent intent) {
try {
int result = DownloadFile(new URL("http://a.com/b.pdf"));
Log.d("IntentService", "Downloaded " + result + " bytes");
Intent broadcastIntent = new Intent();
broadcastIntent.setAction("FILE_DOWNLOADED_ACTION");
getBaseContext().sendBroadcast(broadcastIntent);
} catch (MalformedURLException e) {
e.printStackTrace();
}
}
private int DownloadFile(URL url) {
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
return 100;
}
}
class MyService extends Service {
int counter = 0;
public URL[] urls;
static final int UPDATE_INTERVAL = 1000;
private Timer timer = new Timer();
private final IBinder binder = new MyBinder();
public class MyBinder extends Binder {
MyService getService() {
return MyService.this;
}
}
@Override
public IBinder onBind(Intent arg0) {
return binder;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Toast.makeText(this, "Service Started", Toast.LENGTH_LONG).show();
try {
int result = DownloadFile(new URL("http://amazon.com"));
Toast.makeText(getBaseContext(), "Downloaded " + result + " bytes",
Toast.LENGTH_LONG).show();
} catch (MalformedURLException e) {
e.printStackTrace();
}
try {
new DoBackgroundTask().execute(new URL("http://a.com/a.pdf"),
new URL("http://b.com/b.pdf"),
new URL("http://c.com/c.pdf"),
new URL("http://d.net/d.pdf"));
} catch (MalformedURLException e) {
e.printStackTrace();
}
doSomethingRepeatedly();
Object[] objUrls = (Object[]) intent.getExtras().get("URLs");
URL[] urls = new URL[objUrls.length];
for (int i = 0; i < objUrls.length - 1; i++) {
urls[i] = (URL) objUrls[i];
}
new DoBackgroundTask().execute(urls);
return START_STICKY;
}
private void doSomethingRepeatedly() {
timer.scheduleAtFixedRate(new TimerTask() {
public void run() {
Log.d("MyService", String.valueOf(++counter));
try {
Thread.sleep(4000);
Log.d("MyService", counter + " Finished");
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}, 0, UPDATE_INTERVAL);
}
@Override
public void onDestroy() {
super.onDestroy();
if (timer != null) {
timer.cancel();
}
Toast.makeText(this, "Service Destroyed", Toast.LENGTH_LONG).show();
}
private int DownloadFile(URL url) {
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
return 100;
}
private class DoBackgroundTask extends AsyncTask<URL, Integer, Long> {
protected Long doInBackground(URL... urls) {
int count = urls.length;
long totalBytesDownloaded = 0;
for (int i = 0; i < count; i++) {
totalBytesDownloaded += DownloadFile(urls[i]);
publishProgress((int) (((i + 1) / (float) count) * 100));
}
return totalBytesDownloaded;
}
protected void onProgressUpdate(Integer... progress) {
Log.d("Downloading files", String.valueOf(progress[0])
+ "% downloaded");
Toast.makeText(getBaseContext(),
String.valueOf(progress[0]) + "% downloaded",
Toast.LENGTH_LONG).show();
}
protected void onPostExecute(Long result) {
Toast.makeText(getBaseContext(), "Downloaded " + result + " bytes",
Toast.LENGTH_LONG).show();
stopSelf();
}
}
}
public class Test extends Activity {
IntentFilter intentFilter;
private MyService serviceBinder;
Intent i;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
intentFilter = new IntentFilter();
intentFilter.addAction("FILE_DOWNLOADED_ACTION");
registerReceiver(intentReceiver, intentFilter);
Button btnStart = (Button) findViewById(R.id.btnStartService);
btnStart.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent intent = new Intent(getBaseContext(), MyService.class);
try {
URL[] urls = new URL[] { new URL("http://a.com/a.pdf"),
new URL("http://b.com/b.pdf"),
new URL("http://c.com/c.pdf"),
new URL("http://d.com/d.pdf") };
intent.putExtra("URLs", urls);
} catch (MalformedURLException e) {
e.printStackTrace();
}
startService(intent);
startService(new Intent(getBaseContext(), MyService.class));
startService(new Intent("app.test.MyService"));
startService(new Intent(getBaseContext(), MyIntentService.class));
i = new Intent(Test.this, MyService.class);
bindService(i, connection, Context.BIND_AUTO_CREATE);
}
});
Button btnStop = (Button) findViewById(R.id.btnStopService);
btnStop.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
stopService(new Intent(getBaseContext(), MyService.class));
}
});
}
private ServiceConnection connection = new ServiceConnection() {
public void onServiceConnected(ComponentName className, IBinder service) {
serviceBinder = ((MyService.MyBinder) service).getService();
try {
URL[] urls = new URL[] { new URL("http://a.com/a.pdf"),
new URL("http://b.com/b.pdf"),
new URL("http://c.com/c.pdf"),
new URL("http://d.net/d.pdf") };
serviceBinder.urls = urls;
} catch (MalformedURLException e) {
e.printStackTrace();
}
startService(i);
}
public void onServiceDisconnected(ComponentName className) {
serviceBinder = null;
}
};
private BroadcastReceiver intentReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(getBaseContext(), "File downloaded!",
Toast.LENGTH_LONG).show();
}
};
}
//main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<Button android:id="@+id/btnStartService"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Start Service" />
<Button android:id="@+id/btnStopService"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Stop Service" />
</LinearLayout>
]]>