我有一个像这样的音频文件列表，
int music_numbers[] = { R.raw.one, R.raw.two, R.raw.three, R.raw.four,
R.raw.five, R.raw.six, R.raw.seven, R.raw.eight, R.raw.nine };
我需要逐个播放 - 当我向这个play_numbers方法发送100时 - 我打算用数字方式播放..
我已经这样做了 - 但我无法一个接一个地做这个......
private void _play_numbers(final String i) {
// TODO Auto-generated method stub
mPlayer = MediaPlayer.create(PlayFileActivity.this, R.raw.payment);
mPlayer.start();
mPlayer.setOnCompletionListener(new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
// TODO Auto-generated method stub
mPlayer.stop();
myDigit = i.charAt(1) + "";
_function_play_file(Integer.parseInt(myDigit));
}
});
}
- 我有这个
void _function_play_file(int files) {
switch (files) {
case 0:
mPlayer = MediaPlayer.create(this, music_numbers[0]);
mPlayer.start();
case 1:
mPlayer = MediaPlayer.create(this, music_numbers[1]);
mPlayer.start();
case 2:
mPlayer = MediaPlayer.create(this, music_numbers[2]);
mPlayer.start();
case 3:
mPlayer = MediaPlayer.create(this, music_numbers[3]);
mPlayer.start();
case 4:
mPlayer = MediaPlayer.create(this, music_numbers[4]);
mPlayer.start();
case 5:
mPlayer = MediaPlayer.create(this, music_numbers[5]);
mPlayer.start();
case 6:
mPlayer = MediaPlayer.create(this, music_numbers[6]);
mPlayer.start();
case 7:
mPlayer = MediaPlayer.create(this, music_numbers[7]);
mPlayer.start();
case 8:
mPlayer = MediaPlayer.create(this, music_numbers[8]);
mPlayer.start();
case 9:
mPlayer = MediaPlayer.create(this, music_numbers[9]);
mPlayer.start();
case 10:
mPlayer = MediaPlayer.create(this, music_numbers[10]);
mPlayer.start();
}
}
答案 0 :(得分：6)
您需要为每个设置一个onCompletionListener，并在完成时启动下一个。
mPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener()
{
@Override
public void onCompletion(MediaPlayer mp)
{
// Code to start the next audio in the sequence
}
});
实现此目的的最佳方法是创建一个实现OnCompletionListener的类，该类处理onCompletion并接收要播放的下一个文件。这样您就可以在代码中很好地实例化它。 当然，不要忘记你的休息;在上面的情况。
答案 1 :(得分：5)
使用队列来保存要播放的号码。
private void _play_numbers(final String i) {
// e.g '100': put '1', '0', '0' in a Queue after converting to digits
Queue queue = new LinkedList();
//Use the add method to add items.
myDigit = // remove next digit from queue..
_function_play_file(myDigit);
}
void _function_play_file(int files) {
switch(files) {
case 0:
mPlayer = MediaPlayer.create(PlayFileActivity.this, R.raw.payment);
mPlayer.setOnCompletionListener(completeListener );
mPlayer.start();
break;
.....
}
OnCompletionListener completeListener = new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
mp.release();
myDigit = // remove next digit from queue..
if (myDigit != -1) // if queue is not empty..
_function_play_file(myDigit);
}
});
}
答案 2 :(得分：1)
此代码适用于我，但我将音频文件放在资源文件夹中：
//define a variable to be used as index.
int audioindex = 0;
//Extract the files into an array
String[] files = null;
files = assetManager.list("audiofiles");
mp.setOnCompletionListener(new OnCompletionListener(){
// @Override
public void onCompletion(MediaPlayer arg0) {
// File has ended, play the next one.
FunctionPlayFile(files[audioindex]);
audioindex+=1; //increment the index to get the next audiofile
}
});
答案 3 :(得分：1)
这是用于在继续循环中播放歌曲的工作代码
public class MainActivity extends Activity
{
private int[] tracks = {R.raw.explosion,R.raw.pianothingy_one,R.raw.car_horn_x};
int mCompleted = 0;
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
MediaPlayer mp = MediaPlayer.create(this, tracks[0]);
mp.setOnCompletionListener(new OnCompletionListener()
{
@Override
public void onCompletion(MediaPlayer mp)
{
mCompleted++;
mp.reset();
if (mCompleted < tracks.length)
{
try
{
AssetFileDescriptor afd = getResources().openRawResourceFd(tracks[mCompleted]);
if (afd != null)
{
mp.setDataSource(afd.getFileDescriptor(), afd.getStartOffset(), afd.getLength());
afd.close();
mp.prepare();
mp.start();
}
}
catch (Exception ex)
{
ex.printStackTrace();
}
}
else if (mCompleted>=tracks.length)
{
mCompleted =0;
try
{
AssetFileDescriptor afd = getResources().openRawResourceFd(tracks[mCompleted]);
if (afd != null)
{
mp.setDataSource(afd.getFileDescriptor(), afd.getStartOffset(), afd.getLength());
afd.close();
mp.prepare();
mp.start();
}
}
catch (Exception ex)
{
ex.printStackTrace();
}
}
else
{
mCompleted=0;
mp.release();
mp = null;
}
}
});
mp.start();
答案 4 :(得分：0)
MediaPlayer mediaplayer = new MediaPlayer();
setSound(file );
try {
if(mediaplayer != null)
{
mediaplayer.stop();
mediaplayer.release();
}
mediaplayer.setDataSource(getResources().openRawResourceFd(file)
.getFileDescriptor());
mediaplayer.prepare();
mediaplayer = MediaPlayer.create(getBaseContext(), now);
mediaplayer.start();
mediaplayer.setLooping(false);
mediaplayer.setLooping(true); //sequence playing
} catch (NullPointerException e) {
e.printStackTrace();
}
答案 5 :(得分：0)
使用PlayMedia像这样
int[] soundIDs = {R.raw.yes, R.raw.eat};
PlayMedia playAudio = new PlayMedia(context,soundIDs);
playAudio.execute();
并定义PlayMedia类这样
import android.content.Context;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.AsyncTask;
import android.util.Log;
public class PlayMedia extends AsyncTask<Void, Void, Void> {
private static final String LOG_TAG = PlayMedia.class.getSimpleName();
Context context;
private MediaPlayer mediaPlayer;
int[] soundIDs;
int idx =1;
public PlayMedia(MediaPlayer mediaPlayer) {
this.mediaPlayer = mediaPlayer;
}
public PlayMedia(final Context context, final int[] soundIDs) {
this.context = context;
this.soundIDs=soundIDs;
mediaPlayer = MediaPlayer.create(context,soundIDs[0]);
setNextMediaForMediaPlayer(mediaPlayer);
}
public void setNextMediaForMediaPlayer(MediaPlayer player){
player.setOnCompletionListener(new OnCompletionListener() {
public void onCompletion(MediaPlayer mp) {
if(soundIDs.length>idx){
mp.release();
mp = MediaPlayer.create(context,soundIDs[idx]);
setNextMediaForMediaPlayer(mp);
mp.start();
idx+=1;
}
}
});
}
@Override
protected Void doInBackground(Void... params) {
try {
mediaPlayer.start();
} catch (IllegalArgumentException e) {
Log.e(LOG_TAG, "", e);
} catch (SecurityException e) {
Log.e(LOG_TAG, "", e);
} catch (IllegalStateException e) {
Log.e(LOG_TAG, "", e);
}
return null;
}
}
答案 6 :(得分：0)
对我来说，问题在于我在打电话给mediaPlayer.prepare()之前没有先打电话给mediaPlayer.reset()。
现在一切都好。