extends IntentService to create your own Intent : Intent « Core Class « Android

1. Android
2. Core Class
3. Intent

extends IntentService to create your own Intent

    
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>

   
    
    
    
  

Related examples in the same category