IntentSensor.java

package interdroid.swan.sensors.impl;

import interdroid.swan.ExpressionManager;
import interdroid.swan.R;
import interdroid.swan.SwanException;
import interdroid.swan.ValueExpressionListener;
import interdroid.swan.sensors.AbstractConfigurationActivity;
import interdroid.swan.sensors.AbstractSwanSensor;
import interdroid.swan.swansong.Expression;
import interdroid.swan.swansong.HistoryReductionMode;
import interdroid.swan.swansong.SensorValueExpression;
import interdroid.swan.swansong.TimestampedValue;
import android.os.Bundle;

public class IntentSensor extends AbstractSwanSensor {

	public static final String TAG = "Intent";
	
	/**
	 * The configuration activity for this sensor.
	 * 
	 * @author nick <palmer@cs.vu.nl>
	 * 
	 */
	public static class ConfigurationActivity extends
			AbstractConfigurationActivity {

		@Override
		protected void onCreate(Bundle savedInstanceState) {
			super.onCreate(savedInstanceState);
			setResult(
					RESULT_OK,
					getIntent().putExtra("configuration",
							IntentSensor.STARTED_FIELD));
			finish();
		}

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

	}

	public static final String STARTED_FIELD = "started";

	protected static final int HISTORY_SIZE = 300;

	private static final String MAGIC_RELAY = "INTENTS_FROM_LOGCAT";

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

	@Override
	public void initDefaultConfiguration(Bundle DEFAULT_CONFIGURATION) {
	}

	@Override
	public void onConnected() {
		SENSOR_NAME = "Intent Sensor";
	}

	@Override
	public void register(final String id, final String valuePath,
			final Bundle configuration) {
		configuration.putString("logcat_parameters", "'ActivityManager:I'");
		try {
			ExpressionManager.registerValueExpression(this, id + "."
					+ MAGIC_RELAY, new SensorValueExpression(
					Expression.LOCATION_SELF, "logcat", "log", configuration,
					HistoryReductionMode.ANY, 0),
					new ValueExpressionListener() {

						@Override
						public void onNewValues(String id,
								TimestampedValue[] newValues) {
							for (TimestampedValue value : newValues) {
								// if (value.getValue().toString()
								// .contains("Starting: Intent {")) {
								if (value.getValue().toString()
										.startsWith("START")) {
									putValueTrimSize(valuePath, id,
											value.getTimestamp(),
											getIntentFrom(value.getValue()));
								}
							}
						}
					});
		} catch (SwanException e) {
			e.printStackTrace();
		}
	}

	private String getIntentFrom(final Object value) {
		String string = value.toString();
		string = string.substring(string.indexOf("cmp=") + 4);
		string = string.substring(0, string.indexOf(" "));
		System.out.println("got intent: " + string);
		return string;
	}

	@Override
	public void unregister(final String id) {
		ExpressionManager.unregisterExpression(this, id + "." + MAGIC_RELAY);
	}

	@Override
	public void onDestroySensor() {
		super.onDestroySensor();
	}
}