我有 ListView ，其中包含带有播放按钮和搜索栏的音频文件列表。
当我单击 ListView 的播放按钮时，我想播放音频文件。我成功地实现了这一点，但是当我单击列表中的另一个播放按钮时，两个音频文件正在连续播放，它将继续播放按钮的所有单击。如何限制媒体播放器在一个位置播放，如果我单击另一个图标，它必须停止旧媒体播放器并开始播放新媒体播放器。谁能告诉我如何实现这个？
我有相同的播放和暂停按钮。
@SuppressLint("NewApi") public class ChatMessageAdapter1 extends BaseAdapter implements UpdatableAdapter, AnimationListener{
public ChatMessageAdapter1(Activity activity)
{
// MediaPlayer mp = new MediaPlayer();
@Override
public int getCount() {
return messages.size() + 1;
}
@Override
public Object getItem(int position) {
if (position < messages.size())
return messages.get(position);
else
return null;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public int getViewTypeCount() {
return 3;
}
@Override
public int getItemViewType(int position){
if (position < messages.size())
return TYPE_MESSAGE;
else
return hint == null ? TYPE_EMPTY : TYPE_HINT;
}
//@SuppressLint("RtlHardcoded")
@SuppressLint({ "RtlHardcoded", "NewApi" }) @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1) @Override
public View getView(int position, View convertView, ViewGroup parent)
{
final int type = getItemViewType(position);
final ViewHolder view;
// final View view;
if (convertView == null)
{
final int resource;
if (type == TYPE_MESSAGE)
{
resource = R.layout.chat_viewer_message;
}
else if (type == TYPE_HINT)
resource = R.layout.chat_viewer_info;
else if (type == TYPE_EMPTY)
resource = R.layout.chat_viewer_empty;
else
throw new IllegalStateException();
convertView = activity.getLayoutInflater().inflate(resource, parent, false);
if (type == TYPE_MESSAGE)
{
((TextView) convertView.findViewById(R.id.text)).setTextAppearance(activity, appearanceStyle);
}
view= new ViewHolder();
convertView.setTag(view);
}
else
view = (ViewHolder)convertView.getTag();
//view = convertView;
if (type == TYPE_EMPTY)
return convertView;
if (type == TYPE_HINT) {
TextView textView = ((TextView) convertView.findViewById(R.id.info));
textView.setText(hint);
textView.setTextAppearance(activity, R.style.ChatInfo_Warning);
return convertView;
}
final MessageItem messageItem = (MessageItem) getItem(position);
final String name;
final String account = messageItem.getChat().getAccount();
final String user = messageItem.getChat().getUser();
final String resource = messageItem.getResource();
final boolean incoming = messageItem.isIncoming();
final String messageText = messageItem.getText();
if (isMUC)
{
name = resource;
}
else
name = "";
convertView.setBackgroundColor(Color.TRANSPARENT);
view.textView = (TextView) convertView.findViewById(R.id.text);
final RelativeLayout layoutImage = (RelativeLayout) convertView.findViewById(R.id.layoutImage);
RelativeLayout layoutAudio = (RelativeLayout) convertView.findViewById(R.id.layoutAudio);
view.imgView1 = (ImageView) convertView.findViewById(R.id.attachedImageNvideoShowAyushi);
view.iconImageNvideo = (ImageView) convertView.findViewById(id.iconOnTopOfImageNVideo);
view.imgAudioPlay = (ImageButton) convertView.findViewById(R.id.attachedAUDIOtattlePLAY);
view.avatarView = (ImageView) convertView.findViewById(R.id.avatar);
view.audioSeekBar = (SeekBar) convertView.findViewById(R.id.SeekBarAudioTattle);
view.audioDuration =(TextView) convertView.findViewById(R.id.audioLengthTattle);
view.dateTimeTattle = (TextView) convertView.findViewById(R.id.tattleDateTimeOnChatPage);
view.statusTattle = (ImageView) convertView.findViewById(R.id.tattleStatusOnChatPage);
view.datePast = (TextView) convertView.findViewById(R.id.pastDate);
// view.tabhost = (TabHost) convertView.findViewById(R.id.tabhostAttach);
if(builder.toString().contains("ABCDEF_AUDIO"))
{
layoutAudio.setVisibility(View.VISIBLE);
final MediaPlayer mp;
final Handler durationHandler = new Handler();
view.audioSeekBar.setClickable(true);
view.audioSeekBar.setVisibility(View.VISIBLE);
view.imgView1.setVisibility(View.GONE);
view.iconImageNvideo.setVisibility(View.GONE);
view.textView.setVisibility(View.GONE);
String path = messageItem.getText();
//System.out.println("AUDIO path : " + path);
File PathDirectoryCHECK= new File(Environment.getExternalStorageDirectory().toString() + "/ABCDEF/ABCDEF_AUDIO");
final File PathofAudioCHECK = new File(PathDirectoryCHECK.getPath() + File.separator + path);
//System.out.println("PathofAudioCHECK : " + PathofAudioCHECK);
mp = new MediaPlayer();
mp.setLooping(false);
final Runnable runnableAudio = new Runnable()
{
public void run()
{
timeElapsed = mp.getCurrentPosition();
view.audioSeekBar.setProgress((int) timeElapsed);
finalTime = mp.getDuration();
double timeRemaining = finalTime - timeElapsed;
view.audioDuration.setText(String.format("%d min, %d sec", TimeUnit.MILLISECONDS.toMinutes((long) timeRemaining), TimeUnit.MILLISECONDS.toSeconds((long) timeRemaining) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes((long) timeRemaining))));
durationHandler.postDelayed(this, 100);
}
};
try {
if(PathofAudioCHECK.isFile())
{
final Uri audioUri=Uri.fromFile(PathofAudioCHECK);
mp.setDataSource(activity,audioUri);
mp.setAudioStreamType(AudioManager.STREAM_MUSIC);
mp.prepare();
finalTime = mp.getDuration();
view.audioSeekBar.setMax((int) finalTime);
int duration = mp.getDuration();
if(duration==-1)
view.audioDuration.setText("");
else
view.audioDuration.setText(String.format("%d min, %d sec", TimeUnit.MILLISECONDS.toMinutes((int) duration), TimeUnit.MILLISECONDS.toSeconds((int) duration)));
view.audioSeekBar.setOnTouchListener(new OnTouchListener()
{
@SuppressLint("ClickableViewAccessibility") @Override
public boolean onTouch(View v, MotionEvent event)
{
if(mp.isPlaying())
{
SeekBar sb = (SeekBar)v;
mp.seekTo(sb.getProgress());
}
return false;
}
});
view.imgAudioPlay.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
try
{
//System.out.println("test");s
//System.out.println(""+mp.toString()+"---"+mp.isPlaying());
if(mp.isPlaying() && mp!=null)
{
// mp.pause();
mp.stop();
mp.reset();
mp.release();
if(incoming) {
view.imgAudioPlay.setImageResource(R.drawable.audio_play_incoming_tattle);
}
else {
view.imgAudioPlay.setImageResource(R.drawable.audio_play_outgoing_tattle);
}
}
else if(!mp.isPlaying())
{
if(mp!=null)
{
/*try {
mp.setDataSource(activity,audioUri);
mp.setAudioStreamType(AudioManager.STREAM_MUSIC);
mp.prepare();
}
catch (IllegalStateException e) {
e.printStackTrace();
}
catch (IOException e) {
e.printStackTrace();
}*/
mp.start();
if(incoming)
{
view.imgAudioPlay.setImageResource(R.drawable.audio_pause_incoming_tattle);
}
else
{
view.imgAudioPlay.setImageResource(R.drawable.audio_pause__outgoing_tattle);
}
timeElapsed = mp.getCurrentPosition();
view.audioSeekBar.setProgress((int) timeElapsed);
durationHandler.postDelayed(runnableAudio, 100);
mp.setOnCompletionListener(new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
view.audioSeekBar.setProgress(0);
mp.seekTo(0);
mp.reset();
mp.stop();
mp.release();
durationHandler.removeCallbacks(runnableAudio);
}
});
mp.setOnSeekCompleteListener(new OnSeekCompleteListener()
{
public void onSeekComplete(MediaPlayer mp) {
view.audioSeekBar.setProgress(0);
mp.reset();
mp.stop();
//mp.release();
durationHandler.removeCallbacks(runnableAudio);
}
});
}}
}
catch (IllegalStateException e) {
e.printStackTrace();
}
}});
}
else if(!PathofAudioCHECK.isFile() || PathofAudioCHECK==null)
{
if(incoming)
{
if(counterDOWNLOADfromSERVER!=1)
{
counterDOWNLOADfromSERVER=1;
String[] parts = path.split("\\."); // String array, each element is text between dots
String beforeFirstDot = parts[0];
String pathSubStr=beforeFirstDot.substring(13);
// System.out.println("BUILDER name ID : " + pathSubStr);
String url = configurationsFileTransfer.FILE_URL_TRANSFER + pathSubStr;
new HttpAsyncTaskforAudio().execute(url);
//System.out.println("AUDIo received : " + get_newPathofAUDIOreceived());
try
{
if(get_newPathofAUDIOreceived().exists() || get_newPathofAUDIOreceived().isFile() || get_newPathofAUDIOreceived()!=null)
{
final Uri audioUri=Uri.fromFile(get_newPathofAUDIOreceived());
mp.setDataSource(activity,audioUri);
mp.setAudioStreamType(AudioManager.STREAM_MUSIC);
mp.prepare();
finalTime = mp.getDuration();
view.audioSeekBar.setMax((int) finalTime);
view.audioSeekBar.setMax(mp.getDuration());
int duration = mp.getDuration();
if(duration==-1)
view.audioDuration.setText("");
else
view.audioDuration.setText(String.format("%d min, %d sec", TimeUnit.MILLISECONDS.toMinutes((int) duration), TimeUnit.MILLISECONDS.toSeconds((int) duration)));
view.audioSeekBar.setOnTouchListener(new OnTouchListener()
{
@SuppressLint("ClickableViewAccessibility") @Override
public boolean onTouch(View v, MotionEvent event)
{
if(mp.isPlaying())
{
SeekBar audioSeekBar = (SeekBar)v;
mp.seekTo(audioSeekBar.getProgress());
}
return false;
}
});
view.imgAudioPlay.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
if(mp.isPlaying() && mp!=null)
{
mp.pause();
if(incoming)
{
view.imgAudioPlay.setImageResource(R.drawable.audio_pause_incoming_tattle);
}
else
{
view.imgAudioPlay.setImageResource(R.drawable.audio_pause__outgoing_tattle);
}
}
else if(!mp.isPlaying())
{
if(mp!=null)
{
try {
mp.setDataSource(activity,audioUri);
mp.setAudioStreamType(AudioManager.STREAM_MUSIC);
mp.prepare();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
mp.start();
if(incoming)
{
view.imgAudioPlay.setImageResource(R.drawable.audio_play_incoming_tattle);
}
else
{
view.imgAudioPlay.setImageResource(R.drawable.audio_play_outgoing_tattle);
}
timeElapsed = mp.getCurrentPosition();
view.audioSeekBar.setProgress((int) timeElapsed);
durationHandler.postDelayed(runnableAudio, 100);
mp.setOnCompletionListener(new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
mp.seekTo(0);
mp.reset();
mp.stop();
//mp.release();
durationHandler.removeCallbacks(runnableAudio);
}
});
}
}
}
});
}
else
{
System.out.println("Audio Deleted! 1 ");
}
}
catch(NullPointerException e)
{
System.out.println("null error : " + e.getMessage());
}
}
else
{ }
}
else
{ System.out.println("Audio Deleted! 2");
}
}
}
catch(NullPointerException e)
{
//String pathA = messageItem.getText();
//System.out.println("AUDIO path A : " + pathA);
} catch (IllegalArgumentException e1) {
e1.printStackTrace();
} catch (SecurityException e1) {
e1.printStackTrace();
} catch (IllegalStateException e1) {
e1.printStackTrace();
} catch (IOException e1) {
e1.printStackTrace();
}
// mp.setOnSeekCompleteListener(new OnSeekCompleteListener()
// {
// public void onSeekComplete(MediaPlayer mp) {
// audioSeekBar.setProgress(0);
// mp.reset();
// mp.stop();
// mp.release();
// mp=null;
// durationHandler.removeCallbacks(runnableAudio);
// }
// });
if(activity.isChangingConfigurations())
{
mp.stop();
mp.reset();
//mp.release();
}
if (activity.isFinishing()){
mp.stop();
mp.reset();
//mp.release();
}
}
return convertView;
}
public String getAccount() {
return account;
}
public String getUser() {
return user;
}
public static String GET(String url){
InputStream inputStream = null;
String result = "";
try {
HttpClient httpclient = new DefaultHttpClient();
HttpResponse httpResponse = httpclient.execute(new HttpGet(url));
inputStream = httpResponse.getEntity().getContent();
if(inputStream != null)
result = convertInputStreamToString(inputStream);
else
result = "Did not work!";
} catch (Exception e) {
Log.d("InputStream", e.getLocalizedMessage());
}
return result;
}
private File newPathDirectoryforAudio;
private static File newPathofAUDIOreceived;
private String fid_response_audio;
private class HttpAsyncTaskforAudio extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... urls)
{
return GET(urls[0]);
}
@Override
protected void onPostExecute(String result)
{
// System.out.println("RESULT AUDIO : " + result);
JSONObject json;
try {
json = new JSONObject(result);
fid_response=json.getString("fid");
String fileNAME_response=json.getString("name");
String audioUrl = configurationsFileTransfer.FILE_URL_MEDIA + fileNAME_response;
// System.out.println("audioURL : " + audioUrl);
set_fid_response_audio(fid_response_audio);
new DownloadFileAUDIOfromURL().execute(audioUrl);
} catch (JSONException e)
{
e.printStackTrace();
}
}
}
class DownloadFileAUDIOfromURL extends AsyncTask<String, String, String>
{
@Override
protected String doInBackground(String... f_url) {
int count;
try
{
URL url = new URL(f_url[0]);
URLConnection conection = url.openConnection();
conection.connect();
int lenghtOfFile = conection.getContentLength();
InputStream input = new BufferedInputStream(url.openStream(), 8192);
newPathDirectoryforAudio = new File(Environment
.getExternalStorageDirectory().toString() + "/TATTLE/TATTLE_AUDIO");
if(!newPathDirectoryforAudio.exists())
{
newPathDirectoryforAudio.mkdirs();
}
newPathofAUDIOreceived = new File(newPathDirectoryforAudio.getPath() + File.separator + "TATTLE_AUDIO_"+ get_fid_response() + ".mp3");
set_newPathofAUDIOreceived(newPathofAUDIOreceived);
OutputStream output = new FileOutputStream(newPathofAUDIOreceived);
byte data[] = new byte[1024];
long total = 0;
while ((count = input.read(data)) != -1)
{
total += count;
publishProgress(""+(int)((total*100)/lenghtOfFile));
output.write(data, 0, count);
}
output.flush();
output.close();
input.close();
}
catch (Exception e)
{
Log.e("Error: ", e.getMessage());
}
return null;
}
@Override
protected void onPostExecute(String file_url)
{
// System.out.println("Set incoming audios from this path : " + newPathofAUDIOreceived.toString());
set_newPathofAUDIOreceived(newPathofAUDIOreceived);
notifyDataSetChanged();
}
}
private void set_fid_response_audio(String fid_response_audio)
{
this.fid_response_audio= fid_response_audio;
}
// private String get_fid_response_audio()
// {
// return fid_response_audio;
// }
private static void set_newPathofAUDIOreceived(File newPathofAUDIOreceived)
{
ChatMessageAdapter.newPathofAUDIOreceived= newPathofAUDIOreceived;
}
private static File get_newPathofAUDIOreceived()
{
return newPathofAUDIOreceived;
}
最佳答案
if(builder.toString().contains("ABCDEF_AUDIO"))
{
layoutAudio.setVisibility(View.VISIBLE);
final MediaPlayer mp;
final Handler durationHandler = new Handler();
view.audioSeekBar.setClickable(true);
view.audioSeekBar.setVisibility(View.VISIBLE);
view.imgView1.setVisibility(View.GONE);
view.iconImageNvideo.setVisibility(View.GONE);
view.textView.setVisibility(View.GONE);
String path = messageItem.getText();
//System.out.println("AUDIO path : " + path);
File PathDirectoryCHECK= new File(Environment.getExternalStorageDirectory().toString() + "/ABCDEF/ABCDEF_AUDIO");
final File PathofAudioCHECK = new File(PathDirectoryCHECK.getPath() + File.separator + path);
//System.out.println("PathofAudioCHECK : " + PathofAudioCHECK);
mp = new MediaPlayer();
mp.setLooping(false);
final Runnable runnableAudio = new Runnable()
{
public void run()
{
timeElapsed = mp.getCurrentPosition();
view.audioSeekBar.setProgress((int) timeElapsed);
finalTime = mp.getDuration();
double timeRemaining = finalTime - timeElapsed;
view.audioDuration.setText(String.format("%d min, %d sec", TimeUnit.MILLISECONDS.toMinutes((long) timeRemaining), TimeUnit.MILLISECONDS.toSeconds((long) timeRemaining) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes((long) timeRemaining))));
durationHandler.postDelayed(this, 100);
}
};
try {
if(PathofAudioCHECK.isFile())
{
final Uri audioUri=Uri.fromFile(PathofAudioCHECK);
mp.setDataSource(activity,audioUri);
mp.setAudioStreamType(AudioManager.STREAM_MUSIC);
mp.prepare();
finalTime = mp.getDuration();
view.audioSeekBar.setMax((int) finalTime);
int duration = mp.getDuration();
if(duration==-1)
view.audioDuration.setText("");
else
view.audioDuration.setText(String.format("%d min, %d sec", TimeUnit.MILLISECONDS.toMinutes((int) duration), TimeUnit.MILLISECONDS.toSeconds((int) duration)));
view.audioSeekBar.setOnTouchListener(new OnTouchListener()
{
@SuppressLint("ClickableViewAccessibility") @Override
public boolean onTouch(View v, MotionEvent event)
{
if(mp.isPlaying())
{
SeekBar sb = (SeekBar)v;
mp.seekTo(sb.getProgress());
}
return false;
}
});
view.imgAudioPlay.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
try
{
if(isPlaying && !mp.isPlaying() && mp!=null)
{
mpG.pause();
}
if(mp!=null && mp.isPlaying())
{
mp.pause();
isPlaying = false;
}
else if(!mp.isPlaying())
{
if(mp!=null)
{
mpG = mp;
isPlaying = true;
vhG = view;
mp.start();
timeElapsed = mp.getCurrentPosition();
view.audioSeekBar.setProgress((int) timeElapsed);
durationHandler.postDelayed(runnableAudio, 100);
mp.setOnCompletionListener(new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
view.audioSeekBar.setProgress(0);
mp.seekTo(0);
mp.reset();
mp.stop();
isPlaying = false;
mp.release();
durationHandler.removeCallbacks(runnableAudio);
notifyDataSetChanged();
}
});
mp.setOnSeekCompleteListener(new OnSeekCompleteListener()
{
public void onSeekComplete(MediaPlayer mp) {
// System.out.println("Audio : 6");
view.audioSeekBar.setProgress(0);
mp.reset();
mp.stop();
isPlaying = false;
mp.release();
durationHandler.removeCallbacks(runnableAudio);
notifyDataSetChanged();
}
});
}
}
}
catch (IllegalStateException e) {
e.printStackTrace();
}
}});
}
else if(!PathofAudioCHECK.isFile() || PathofAudioCHECK==null)
{
if(incoming)
{
if(counterDOWNLOADfromSERVER!=1)
{
counterDOWNLOADfromSERVER=1;
String[] parts = path.split("\\."); // String array, each element is text between dots
String beforeFirstDot = parts[0];
String pathSubStr=beforeFirstDot.substring(13);
// System.out.println("BUILDER name ID : " + pathSubStr);
String url = configurationsFileTransfer.FILE_URL_TRANSFER + pathSubStr;
new HttpAsyncTaskforAudio().execute(url);
//System.out.println("AUDIo received : " + get_newPathofAUDIOreceived());
try
{
if(get_newPathofAUDIOreceived().exists() || get_newPathofAUDIOreceived().isFile() || get_newPathofAUDIOreceived()!=null)
{
final Uri audioUri=Uri.fromFile(get_newPathofAUDIOreceived());
mp.setDataSource(activity,audioUri);
mp.setAudioStreamType(AudioManager.STREAM_MUSIC);
mp.prepare();
finalTime = mp.getDuration();
view.audioSeekBar.setMax((int) finalTime);
view.audioSeekBar.setMax(mp.getDuration());
int duration = mp.getDuration();
if(duration==-1)
view.audioDuration.setText("");
else
view.audioDuration.setText(String.format("%d min, %d sec", TimeUnit.MILLISECONDS.toMinutes((int) duration), TimeUnit.MILLISECONDS.toSeconds((int) duration)));
view.audioSeekBar.setOnTouchListener(new OnTouchListener()
{
@SuppressLint("ClickableViewAccessibility") @Override
public boolean onTouch(View v, MotionEvent event)
{
if(mp.isPlaying())
{
SeekBar audioSeekBar = (SeekBar)v;
mp.seekTo(audioSeekBar.getProgress());
}
return false;
}
});
view.imgAudioPlay.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
if(isPlaying && !mp.isPlaying() && mp!=null){
mpG.pause();
}
if(mp.isPlaying() && mp!=null)
{
mp.pause();
isPlaying = false;
}
else if(!mp.isPlaying())
{
if(mp!=null)
{
try {
mp.setDataSource(activity,audioUri);
mp.setAudioStreamType(AudioManager.STREAM_MUSIC);
mp.prepare();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
mpG = mp;
isPlaying = true;
vhG = view;
mp.start();
timeElapsed = mp.getCurrentPosition();
view.audioSeekBar.setProgress((int) timeElapsed);
durationHandler.postDelayed(runnableAudio, 100);
mp.setOnCompletionListener(new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
mp.seekTo(0);
mp.reset();
mp.stop();
isPlaying = false;
durationHandler.removeCallbacks(runnableAudio);
}
});
}
}
}
});
}
else
{
System.out.println("Audio Deleted! 1 ");
}
}
catch(NullPointerException e)
{
System.out.println("null error : " + e.getMessage());
}
}
else
{ }
}
else
{ System.out.println("Audio Deleted! 2");
}
}
}
catch(NullPointerException e)
{
} catch (IllegalArgumentException e1) {
e1.printStackTrace();
} catch (SecurityException e1) {
e1.printStackTrace();
} catch (IllegalStateException e1) {
e1.printStackTrace();
} catch (IOException e1) {
e1.printStackTrace();
}
if(activity.isChangingConfigurations())
{
mp.stop();
mp.reset();
}
if (activity.isFinishing()){
mp.stop();
mp.reset();
}
}
关于java - Android - ListView 中的音频播放器，具有单个音频播放实例，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/29367188/