MainActivity.java

/*
 * Copyright (C) 2012 Jacquet Wong
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 * musicg api in Google Code: http://code.google.com/p/musicg/
 * Android Application in Google Play: https://play.google.com/store/apps/details?id=com.whistleapp
 * 
 */

package com.musicg.demo.android;

import android.os.Bundle;
import android.app.Activity;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends Activity implements OnSignalsDetectedListener{

	static MainActivity mainApp;
	
	public static final int DETECT_NONE = 0;
	public static final int DETECT_WHISTLE = 1;
	public static int selectedDetection = DETECT_NONE;

	// detection parameters
	private DetectorThread detectorThread;
	private RecorderThread recorderThread;
	private int numWhistleDetected = 0;

	// views
	private View mainView, listeningView;
	private Button whistleButton;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setTitle("musicg WhistleAPI Demo");

		mainApp = this;
		
		// set views
		LayoutInflater inflater = LayoutInflater.from(this);
		mainView = inflater.inflate(R.layout.main, null);
		listeningView = inflater.inflate(R.layout.listening, null);
		setContentView(mainView);

		whistleButton = (Button) this.findViewById(R.id.whistleButton);
		whistleButton.setOnClickListener(new ClickEvent());
	}

	private void goHomeView() {
		setContentView(mainView);
		if (recorderThread != null) {
			recorderThread.stopRecording();
			recorderThread = null;
		}
		if (detectorThread != null) {
			detectorThread.stopDetection();
			detectorThread = null;
		}
		selectedDetection = DETECT_NONE;
	}
	
	private void goListeningView(){
		setContentView(listeningView);
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		menu.add(0, 0, 0, "Quit demo");
		return super.onCreateOptionsMenu(menu);
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		switch (item.getItemId()) {
		case 0:
			finish();
			break;
		default:
		}
		return super.onOptionsItemSelected(item);
	}

	@Override
	public boolean onKeyDown(int keyCode, KeyEvent event) {
		if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
			goHomeView();
			return true;
		}
		return super.onKeyDown(keyCode, event);
	}

	class ClickEvent implements OnClickListener {
		public void onClick(View view) {
			if (view == whistleButton) {
				selectedDetection = DETECT_WHISTLE;
				recorderThread = new RecorderThread();
				recorderThread.start();
				detectorThread = new DetectorThread(recorderThread);
				detectorThread.setOnSignalsDetectedListener(MainActivity.mainApp);
				detectorThread.start();
				goListeningView();
			}
		}
	}

	protected void onDestroy() {
		super.onDestroy();
		android.os.Process.killProcess(android.os.Process.myPid());
	}

	@Override
	public void onWhistleDetected() {
		runOnUiThread(new Runnable() {
			public void run() {
				TextView textView = (TextView) MainActivity.mainApp.findViewById(R.id.detectedNumberText);
				textView.setText(String.valueOf(numWhistleDetected++));
			}
		});
	}
}