求android播放声音的代码！！！

[肖恩]

如题，
在用户点击按钮的时候，发出 '滴' 的声音，这个怎么实现呢？？

[phper2008]

完整实现
布局：main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:layout_width="fill_parent" android:layout_height="fill_parent"
	android:minHeight="40dip" android:gravity="center_vertical" 
	android:descendantFocusability= "blocksDescendants">

	<Button android:textSize="17sp" android:textStyle="bold"
		android:textColor="#ff000000" android:layout_width="wrap_content"
		android:layout_height="wrap_content" android:text="点击按钮" android:id="@+id/btnCktp"
		android:layout_alignParentRight="true" 
		android:focusable="false" android:clickable="true"/>

	<TextView android:id="@+id/tvMsg" android:layout_width="fill_parent"
		android:layout_height="40dip" android:textSize="16dip"
		android:gravity="center_vertical|left" android:textColor="#ff000000"
		android:layout_alignParentLeft="true" android:layout_toLeftOf="@id/btnCktp">
	</TextView>

</RelativeLayout>

beepSound.java

package bee.android.control.csdn;

import android.app.Activity;
import android.media.AudioFormat;
import android.media.AudioManager;
import android.media.AudioTrack;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import bee.android.control.R;

public class beepSound extends Activity implements OnClickListener {

	private final int duration = 3; // seconds
	private final int sampleRate = 8000;
	private final int numSamples = duration * sampleRate;
	private final double sample[] = new double[numSamples];
	private final double freqOfTone = 100; // hz

	private final byte generatedSnd[] = new byte[2 * numSamples];

	Handler handler = new Handler();

	TextView tvMsg;
	Button btnCktp;

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

		tvMsg = (TextView) this.findViewById(R.id.tvMsg);
		btnCktp = (Button) this.findViewById(R.id.btnCktp);
		btnCktp.setTag("点击按钮发音");
		btnCktp.setText("点击发音");
		btnCktp.setOnClickListener(this);
	}

	@Override
	protected void onResume() {
		super.onResume();

	}

	void genTone() {
		// fill out the array
		for (int i = 0; i < numSamples; ++i) {
			sample[i] = Math.sin(2 * Math.PI * i / (sampleRate / freqOfTone));
		}

		// convert to 16 bit pcm sound array
		// assumes the sample buffer is normalised.
		int idx = 0;
		for (double dVal : sample) {
			short val = (short) (dVal * 32767);
			generatedSnd[idx++] = (byte) (val & 0x00ff);
			generatedSnd[idx++] = (byte) ((val & 0xff00) >>> 8);
		}
	}

	void playSound() {
		AudioTrack audioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, 8000,
				AudioFormat.CHANNEL_CONFIGURATION_MONO,
				AudioFormat.ENCODING_PCM_16BIT, numSamples,
				AudioTrack.MODE_STATIC);
		audioTrack.write(generatedSnd, 0, numSamples);
		audioTrack.play();
	}

	@Override
	public void onClick(View v) {
		// TODO Auto-generated method stub
		switch (v.getId()) {
		case R.id.btnCktp:
			// Use a new tread as this can take a while
			Thread thread = new Thread(new Runnable() {
				public void run() {
					genTone();
					handler.post(new Runnable() {

						public void run() {
							playSound();
						}
					});
				}
			});
			thread.start();

			break;
		}
	}

}