我的soundpool没有从sdcard正确加载其文件。我从logcat了解到这一点。在这里我也在写我的logcat。 它正确录制我的声音，文件也保存在SD卡中。但是soundpool没有启动/加载它。 它在logcat中不断显示此错误消息。
LOGCAT :
08-13 00:20:30.076: V/AudioTrack(1726): Underrun user: 0, server: 0, flags 0013
08-13 00:20:31.488: V/AudioTrack(1726): Underrun user: 0, server: 0, flags 0013
08-13 00:20:32.309: V/AudioTrack(1726): Underrun user: 0, server: 0, flags 0013
08-13 00:20:32.809: V/AudioTrack(1726): Underrun user: 0, server: 0, flags 0013
package com.javacodegeeks.android.audiocapturetest;
import java.io.File;
import java.io.IOException;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.media.SoundPool;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.app.Activity;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Intent;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
private MediaRecorder myRecorder;
private MediaPlayer myPlayer;
private File outputFile = null;
private String outFile = null;
private Button startBtn;
private Button stopBtn;
private Button playBtn;
private Button stopPlayBtn;
private Spinner sp;
private TextView text;
public SoundPool spl;
public int explosion = 0;
private Button playMod;
private Uri newUri;
private static final String TAG = "SoundRecordingActivity";
String [] singers = {"Atif Aslam" , "Arijit Singh" , "Shreya Goshal"};
public MainActivity() {
outFile = Environment.getExternalStorageDirectory().getAbsolutePath();
outFile += "/audiorecordtest.m4a";
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
text = (TextView) findViewById(R.id.text1);
sp = (Spinner)findViewById(R.id.spinner1);
ArrayAdapter<String> adp=new ArrayAdapter<String>(this,
android.R.layout.simple_dropdown_item_1line,singers);
adp.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
sp.setAdapter(adp);
// store it to sd card
//outFile = Environment.getExternalStorageDirectory().
// getAbsolutePath() + "/AudioRecord.3gpp";
File sampleDir = Environment.getExternalStorageDirectory();
try {
outputFile = File.createTempFile("sound", ".m4a", sampleDir);
} catch (IOException e) {
Toast.makeText(this, "No Memory Card Inserted", Toast.LENGTH_LONG).show();
Log.e(TAG, "sdcard access error");
return;
}
myRecorder = new MediaRecorder();
myRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
myRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
myRecorder.setAudioEncoder(MediaRecorder.OutputFormat.AMR_NB);
myRecorder.setOutputFile(outputFile.getAbsolutePath());
startBtn = (Button)findViewById(R.id.start);
startBtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
start(v);
}
});
stopBtn = (Button)findViewById(R.id.stop);
stopBtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
stop(v);
}
});
playBtn = (Button)findViewById(R.id.play);
playBtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
play(v);
}
});
stopPlayBtn = (Button)findViewById(R.id.stopPlay);
stopPlayBtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
stopPlay(v);
}
});
playMod = (Button)findViewById(R.id.button1);
playMod.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
playModified(v);
}
});
}
public void start(View view){
try {
myRecorder.prepare();
myRecorder.start();
} catch (IllegalStateException e) {
// start:it is called before prepare()
// prepare: it is called after start() or before setOutputFormat()
e.printStackTrace();
} catch (IOException e) {
// prepare() fails
e.printStackTrace();
}
text.setText("Recording Point: Recording");
startBtn.setEnabled(false);
stopBtn.setEnabled(true);
Toast.makeText(getApplicationContext(), "Start recording...",
Toast.LENGTH_SHORT).show();
}
public void playModified(View v)
{
int minBufferSize = AudioTrack.getMinBufferSize(sampleRate, AudioFormat.CHANNEL_OUT_STEREO, AudioFormat.ENCODING_PCM_16BIT);
if(minBufferSize > 0)
{
mAudioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, sampleRate,
AudioFormat.CHANNEL_OUT_STEREO, AudioFormat.ENCODING_PCM_16BIT, minBufferSize, AudioTrack.MODE_STREAM);
mAudioTrack.setPlaybackRate(22050);
mAudioTrack.play();
}
else
{
Toast.makeText(this , "Invalid Sample Rate" , Toast.LENGTH_LONG).show();
}
String sing = sp.getSelectedItem().toString();
if(explosion != 0 )
{
if(sing == "Atif Aslam")
{
Toast.makeText(this, "Atif Aslam", Toast.LENGTH_LONG).show();
spl.play(explosion, 0.98F, 0.98F, 1, 0, 1.3F);
}
else if(sing == "Arijit Singh")
{
Toast.makeText(this, "Arijit singh", Toast.LENGTH_LONG).show();
spl.play(explosion, 0.3F, 0.3F, 0, 0, 2.0F);
}
else if(sing == "Shreya Goshal")
{
Toast.makeText(this, "Shreya", Toast.LENGTH_LONG).show();
spl.play(explosion, 0.8F, 0.8F, 0, 0, 0.6F);
}
else
{
Toast.makeText(this, "No File Found A", Toast.LENGTH_LONG).show();
return;
}
}
else
{
Toast.makeText(this, "No File Found B",Toast.LENGTH_LONG).show();
return;
}
}
protected void addRecordingToMediaLibrary() {
ContentValues values = new ContentValues(4);
long current = System.currentTimeMillis();
values.put(MediaStore.Audio.Media.TITLE, "audio" + outputFile);
values.put(MediaStore.Audio.Media.DATE_ADDED, (int) (current / 1000));
values.put(MediaStore.Audio.Media.MIME_TYPE, "audio/3gpp");
values.put(MediaStore.Audio.Media.DATA, outputFile.getAbsolutePath());
ContentResolver contentResolver = getContentResolver();
Uri base = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
newUri = contentResolver.insert(base, values);
sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, newUri));
Toast.makeText(this, "Added File " + newUri, Toast.LENGTH_LONG).show();
}
public void stop(View view){
try {
myRecorder.stop();
myRecorder.release();
myRecorder = null;
stopBtn.setEnabled(false);
playBtn.setEnabled(true);
text.setText("Recording Point: Stop recording");
Toast.makeText(getApplicationContext(), "Stop recording...",
Toast.LENGTH_SHORT).show();
/////////////////////////////////////
// addRecordingToMediaLibrary();
//////////////////////////////////////
} catch (IllegalStateException e) {
// it is called before start()
e.printStackTrace();
} catch (RuntimeException e) {
// no valid audio/video data has been received
e.printStackTrace();
}
}
public void play(View view) {
try{
myPlayer = new MediaPlayer();
myPlayer.setDataSource(outputFile.getAbsolutePath());
myPlayer.prepare();
myPlayer.start();
playBtn.setEnabled(false);
stopPlayBtn.setEnabled(true);
text.setText("Recording Point: Playing");
Toast.makeText(getApplicationContext(), "Start play the recording...",
Toast.LENGTH_SHORT).show();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void stopPlay(View view) {
try {
if (myPlayer != null) {
myPlayer.stop();
myPlayer.release();
myPlayer = null;
playBtn.setEnabled(true);
stopPlayBtn.setEnabled(false);
text.setText("Recording Point: Stop playing");
Toast.makeText(getApplicationContext(), "Stop playing the recording...",
Toast.LENGTH_SHORT).show();
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
答案 0 :(得分：0)
因为我告诉你不要使用soundpool，因为它不支持大文件 所以请使用soundpool之外的其他内容
mAudioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, sampleRate,
channelConfig, format, bufsize, AudioTrack.MODE_STREAM);
mAudioTrack.setPlaybackRate(sampleRate);
mAudioTrack.play();
使用上面的snippest，它将指导您使用audiotrack概念来播放录制的文件
其中setPlaybackRate（）方法设置播放速率，您可以在其中添加额外费率，或者您可以减去原始速率，然后您的音调将会改变
根据标准音高变化率总是在0.5到2.0之间，其中1.0是原始音高
所以在上面的代码中使用上面的代码，如果你想增加音高那么
mAudioTrack.setPlaybackRate(sampleRate+22050);//here am assuming recording sample rate is 44100
在这种情况下，我添加了22050意味着播放速率将为1.5，因此您的录制文件将以1.5的间距播放，希望它能帮助您快乐编码