GestureRevealerActivity.java

package com.pinecone.technology.mcommerce.learning.android.chapter11.gestures;

import java.util.ArrayList;

import android.app.Activity;
import android.gesture.Gesture;
import android.gesture.GestureLibraries;
import android.gesture.GestureLibrary;
import android.gesture.GestureOverlayView;
import android.gesture.GestureOverlayView.OnGesturePerformedListener;
import android.gesture.Prediction;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;

import com.pinecone.technology.mcommerce.learning.android.chapter11.R;

public class GestureRevealerActivity extends Activity implements
		OnGesturePerformedListener {
	private static final String TAG = "Gesture Revealer";
	GestureLibrary gestureLib = null;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.gesture_revealer_layout);

		gestureLib = GestureLibraries.fromRawResource(this,
				R.raw.gestures_letters);
		// String filename =
		// Environment.getExternalStorageDirectory().toString() +
		// "/gestures";
		// gestureLib = GestureLibraries.fromFile(filename);

		// Here's where we can change the default values, prior to load
		// gestureLib.setOrientationStyle(GestureStore.ORIENTATION_INVARIANT);
		// gestureLib.setSequenceType(GestureStore.SEQUENCE_INVARIANT);

		// if (!gestureLib.load()) {
		// Toast.makeText(this, "Could not load " + filename,
		// Toast.LENGTH_SHORT).show();
		// finish();
		// }

		// Let's take a look at the gesture library we have work with
		Log.v(TAG, "Library features:");
		Log.v(TAG, "  Orientation style: " + gestureLib.getOrientationStyle());
		Log.v(TAG, "  Sequence type: " + gestureLib.getSequenceType());
		for (String gestureName : gestureLib.getGestureEntries()) {
			Log.v(TAG, "For gesture " + gestureName);
			int i = 1;
			for (Gesture gesture : gestureLib.getGestures(gestureName)) {
				Log.v(TAG, "    " + i + ": ID: " + gesture.getID());
				Log.v(TAG,
						"    " + i + ": Strokes count: "
								+ gesture.getStrokesCount());
				Log.v(TAG,
						"    " + i + ": Stroke length: " + gesture.getLength());
				i++;
			}
		}

		GestureOverlayView gestureView = (GestureOverlayView) findViewById(R.id.gestureOverlay);
		gestureView.addOnGesturePerformedListener(this);

		// gestureView.setGestureStrokeType(GestureOverlayView.GESTURE_STROKE_TYPE_MULTIPLE);
	}

	public void onGesturePerformed(GestureOverlayView view, Gesture gesture) {
		ArrayList<Prediction> predictions = gestureLib.recognize(gesture);
		Log.v(TAG, "in onGesturePerformed");

		if (predictions.size() > 0) {
			Prediction prediction = (Prediction) predictions.get(0);
			if (prediction.score > 1.0) {
				Toast.makeText(this, prediction.name, Toast.LENGTH_SHORT)
						.show();
				for (int i = 0; i < predictions.size(); i++)
					Log.v(TAG, "prediction " + predictions.get(i).name
							+ " - score = " + predictions.get(i).score);
			}
		}
	}
}