SoundPoolDemoActivity.java

package com.google.mcommerce.sample.android.chapter10.mediaplay;

import java.io.IOException;

import android.app.Activity;
import android.content.Context;
import android.content.res.AssetFileDescriptor;
import android.media.AudioManager;
import android.media.SoundPool;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.View;
import android.widget.ToggleButton;

import com.google.mcommerce.sample.android.R;

public class SoundPoolDemoActivity extends Activity implements
		SoundPool.OnLoadCompleteListener {
	private static final int SRC_QUALITY = 0;
	private static final int PRIORITY = 1;
	private SoundPool soundPool = null;
	private AudioManager aMgr;

	private int sid_background;
	private int sid_roar;
	private int sid_bark;
	private int sid_chimp;
	private int sid_rooster;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.c10_media_sound_pool_layout);
	}

	@Override
	protected void onResume() {
		soundPool = new SoundPool(4, AudioManager.STREAM_MUSIC, SRC_QUALITY);
		soundPool.setOnLoadCompleteListener(this);

		aMgr = (AudioManager) this.getSystemService(Context.AUDIO_SERVICE);

		sid_background = soundPool.load(this, R.raw.crickets, PRIORITY);

		sid_chimp = soundPool.load(this, R.raw.chimp, PRIORITY);
		sid_rooster = soundPool.load(this, R.raw.rooster, PRIORITY);
		sid_roar = soundPool.load(this, R.raw.roar, PRIORITY);

		try {
			AssetFileDescriptor afd = this.getAssets().openFd("dogbark.mp3");
			sid_bark = soundPool.load(afd.getFileDescriptor(), 0,
					afd.getLength(), PRIORITY);
			afd.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
		// sid_bark = soundPool.load("/mnt/sdcard/dogbark.mp3", PRIORITY);

		super.onResume();
	}

	public void doClick(View view) {
		switch (view.getId()) {
		case R.id.button:
			if (((ToggleButton) view).isChecked()) {
				soundPool.autoResume();
			} else {
				soundPool.autoPause();
			}
			break;
		}
	}

	@Override
	protected void onPause() {
		soundPool.release();
		soundPool = null;
		super.onPause();
	}

	@Override
	public void onLoadComplete(SoundPool sPool, int sid, int status) {
		Log.v("soundPool", "sid " + sid + " loaded with status " + status);

		final float currentVolume = ((float) aMgr
				.getStreamVolume(AudioManager.STREAM_MUSIC))
				/ ((float) aMgr.getStreamMaxVolume(AudioManager.STREAM_MUSIC));

		if (status != 0)
			return;
		if (sid == sid_background) {
			if (sPool.play(sid, currentVolume, currentVolume, PRIORITY, -1,
					1.0f) == 0)
				Log.v("soundPool", "Failed to start sound");
		} else if (sid == sid_chimp) {
			queueSound(sid, 5000, currentVolume);
		} else if (sid == sid_rooster) {
			queueSound(sid, 6000, currentVolume);
		} else if (sid == sid_roar) {
			queueSound(sid, 12000, currentVolume);
		} else if (sid == sid_bark) {
			queueSound(sid, 7000, currentVolume);
		}
	}

	private void queueSound(final int sid, final long delay, final float volume) {
		new Handler().postDelayed(new Runnable() {
			@Override
			public void run() {
				if (soundPool == null)
					return;
				if (soundPool.play(sid, volume, volume, PRIORITY, 0, 1.0f) == 0)
					Log.v("soundPool", "Failed to start sound (" + sid + ")");
				queueSound(sid, delay, volume);
			}
		}, delay);
	}
}