Android Open Source - clusterkraf Clustering Task

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Back to project page clusterkraf.

License

The source code is released under:

Apache License

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Java Source Code

package com.twotoasters.clusterkraf;
//from ww w  . j  a va 2  s.  c  o m
import java.util.ArrayList;

import android.os.AsyncTask;
import android.os.Process;

import com.google.android.gms.maps.Projection;
import com.twotoasters.clusterkraf.ClusteringTask.Argument;
import com.twotoasters.clusterkraf.ClusteringTask.Result;

/**
 *
 */
public class ClusteringTask extends AsyncTask<Argument, Void, Result> {

  private final Host host;

  ClusteringTask(Host host) {
    this.host = host;
  }

  /**
   * @see android.os.AsyncTask#doInBackground(Params[])
   */
  @Override
  protected Result doInBackground(Argument... args) {
    Result result = new Result();
    if (args != null && args.length == 1) {
      Process.setThreadPriority(Process.THREAD_PRIORITY_DEFAULT + Process.THREAD_PRIORITY_LESS_FAVORABLE);

      Argument arg = args[0];
      ClustersBuilder builder = new ClustersBuilder(arg.projection, arg.options, arg.previousClusters);
      builder.addAll(arg.points);
      result.currentClusters = builder.build();
      result.projection = arg.projection;

      Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND);
    }
    return result;
  }

  /**
   * @see android.os.AsyncTask#onPostExecute(java.lang.Object)
   */
  @Override
  protected void onPostExecute(Result result) {
    super.onPostExecute(result);
    if (isCancelled() == false && result != null && host != null) {
      host.onClusteringTaskPostExecute(result);
    }
  }

  static class Argument {
    Projection projection;
    Options options;
    ArrayList<InputPoint> points;
    ArrayList<ClusterPoint> previousClusters;
  }

  static class Result {
    Projection projection;
    ArrayList<ClusterPoint> currentClusters;
  }

  interface Host {
    void onClusteringTaskPostExecute(Result result);
  }

}

Java Source Code List