Android Open Source - interdroid-swan Log Cat Sensor

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License

The source code is released under:

Copyright (c) 2008-2011 Vrije Universiteit, The Netherlands All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the follo...

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Java Source Code

package interdroid.swan.sensors.impl;
//from   w  w w . ja v a2 s  .com
import interdroid.swan.R;
import interdroid.swan.sensors.AbstractConfigurationActivity;
import interdroid.swan.sensors.AbstractMemorySensor;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Map;

import android.os.Bundle;
import android.util.Log;

public class LogCatSensor extends AbstractMemorySensor {

  private static final String TAG = "LogCat Sensor";

  /**
   * The configuration activity for this sensor.
   * 
   * @author nick &lt;palmer@cs.vu.nl&gt;
   * 
   */
  public static class ConfigurationActivity extends
      AbstractConfigurationActivity {

    @Override
    public int getPreferencesXML() {
      return R.xml.logcat_preferences;
    }

  }

  public static final String LOG_FIELD = "log";

  public static final String LOGCAT_PARAMETERS = "logcat_parameters";

  public static final String DEFAULT_LOGCAT_PARAMETERS = "*:I";

  protected static final int HISTORY_SIZE = 20;

  private Map<String, LogcatPoller> activeThreads = new HashMap<String, LogcatPoller>();

  @Override
  public String[] getValuePaths() {
    return new String[] { LOG_FIELD };
  }

  @Override
  public void initDefaultConfiguration(Bundle DEFAULT_CONFIGURATION) {
    DEFAULT_CONFIGURATION.putString(LOGCAT_PARAMETERS,
        DEFAULT_LOGCAT_PARAMETERS);
  }

  @Override
  public void onConnected() {
  }

  @Override
  public final void register(String id, String valuePath, Bundle configuration) {
    Log.d(TAG, "Logcat got registration for: " + id + ", conf: "
        + configuration.getString(LOGCAT_PARAMETERS));
    LogcatPoller logcatPoller = new LogcatPoller(id, valuePath,
        configuration);
    activeThreads.put(id, logcatPoller);
    logcatPoller.start();
  }

  @Override
  public final void unregister(String id) {
    activeThreads.remove(id).terminate();
  }

  class LogcatPoller extends Thread {

    private String id;
    private Bundle configuration;
    private String valuePath;
    private Process process;

    LogcatPoller(String id, String valuePath, Bundle configuration) {
      this.id = id;
      this.configuration = configuration;
      this.valuePath = valuePath;
    }

    public void terminate() {
      process.destroy();
    }

    public void run() {
      new Thread() {
        public void run() {
          String parameters = configuration
              .getString(LOGCAT_PARAMETERS);
          if (parameters == null) {
            parameters = mDefaultConfiguration
                .getString(LOGCAT_PARAMETERS);
          }
          try {
            process = Runtime
                .getRuntime()
                .exec(new String[] { "/system/bin/sh", "-c",
                    "/system/bin/logcat -s " + parameters });
            BufferedReader reader = new BufferedReader(
                new InputStreamReader(process.getInputStream()));
            String line = null;
            while ((line = reader.readLine()) != null) {
              System.out.println("line: " + line);
              long now = System.currentTimeMillis();
              putValueTrimSize(valuePath, id, now, line,
                  HISTORY_SIZE);
            }
            reader.close();
          } catch (IOException e) {
            e.printStackTrace();
          }
        }
      }.start();

    }

  }

  @Override
  public void onDestroySensor() {
    for (LogcatPoller logcatPoller : activeThreads.values()) {
      logcatPoller.terminate();
    }
  };

}

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