我想使用单个播放按钮执行这三个功能。 第一个过程 - 当我们点击播放按钮时，媒体播放器应播放音频。 第二个过程 - 当用户第二次点击播放按钮时，应暂停音频。 第三个过程 - 当用户点击第三次播放按钮时，音频应该从暂停的歌曲中恢复。
尝试了下面的代码
if (!mediaPlayer.isPlaying()) {
mediaPlayer.reset();
try {
mediaPlayer.setDataSource(path);
// mediaPlayer.setOnPreparedListener((MediaPlayer.OnPreparedListener) getActivity());
mediaPlayer.prepare();
} catch (IOException e) {
e.printStackTrace();
}
mediaPlayer.start();
}
else if (mediaPlayer.isPlaying()) {
mediaPlayer.pause();
}
else if (!mediaPlayer.isPlaying() && mediaPlayer.getCurrentPosition() > 0) {
long currentPosition = mediaPlayer.getCurrentPosition();
mediaPlayer.seekTo((int) currentPosition);
mediaPlayer.start();
}
以上代码无效，请帮我解决这个问题。
答案 0 :(得分：1)
试试这种方式
public class MainActivity extends Activity {
private Button btn;
/**
* help to toggle between play and pause.
*/
private boolean playPause;
private MediaPlayer mediaPlayer;
/**
* remain false till media is not completed, inside OnCompletionListener make it true.
*/
private boolean intialStage = true;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn = (Button) findViewById(R.id.button1);
mediaPlayer = new MediaPlayer();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
btn.setOnClickListener(pausePlay);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
private OnClickListener pausePlay = new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
// TODO Auto-generated method stub
if (!playPause) {
btn.setBackgroundResource(R.drawable.button_pause);
if (intialStage)
new Player()
.execute("http://www.virginmegastore.me/Library/Music/CD_001214/Tracks/Track1.mp3");
else {
if (!mediaPlayer.isPlaying())
mediaPlayer.start();
}
playPause = true;
} else {
btn.setBackgroundResource(R.drawable.button_play);
if (mediaPlayer.isPlaying())
mediaPlayer.pause();
playPause = false;
}
}
};
/**
* preparing mediaplayer will take sometime to buffer the content so prepare it inside the background thread and starting it on UI thread.
* @author piyush
*
*/
class Player extends AsyncTask<String, Void, Boolean> {
private ProgressDialog progress;
@Override
protected Boolean doInBackground(String... params) {
// TODO Auto-generated method stub
Boolean prepared;
try {
mediaPlayer.setDataSource(params[0]);
mediaPlayer.setOnCompletionListener(new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
// TODO Auto-generated method stub
intialStage = true;
playPause=false;
btn.setBackgroundResource(R.drawable.button_play);
mediaPlayer.stop();
mediaPlayer.reset();
}
});
mediaPlayer.prepare();
prepared = true;
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
Log.d("IllegarArgument", e.getMessage());
prepared = false;
e.printStackTrace();
} catch (SecurityException e) {
// TODO Auto-generated catch block
prepared = false;
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
prepared = false;
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
prepared = false;
e.printStackTrace();
}
return prepared;
}
@Override
protected void onPostExecute(Boolean result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
if (progress.isShowing()) {
progress.cancel();
}
Log.d("Prepared", "//" + result);
mediaPlayer.start();
intialStage = false;
}
public Player() {
progress = new ProgressDialog(MainActivity.this);
}
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
this.progress.setMessage("Buffering...");
this.progress.show();
}
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
if (mediaPlayer != null) {
mediaPlayer.reset();
mediaPlayer.release();
mediaPlayer = null;
}
}
答案 1 :(得分：0)
你可以试试这个
protected void initViews(Context context) {
mContext = context;
oneTimeOnly = 0;
mRootView = LayoutInflater.from(context).inflate(R.layout.view_digital_audio_content, this);
btn_delete = (ImageButton) mRootView.findViewById(R.id.btn_delete);
tv_current_duration = (TextView) mRootView.findViewById(R.id.tv_current_duration);
tv_total_duration = (TextView) mRootView.findViewById(R.id.tv_total_duration);
seekbar = (SeekBar) mRootView.findViewById(R.id.seekbar);
btn_Play = (ImageButton) mRootView.findViewById(R.id.btn_play);
seekbar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
if (mediaPlayer != null && fromUser) {
mediaPlayer.seekTo(progress);
}
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
initMediaPlayer();
btn_delete.setOnClickListener(this);
btn_Play.setOnClickListener(this);
}
private void initMediaPlayer() {
transactionDetail = FCSingleton.getTransactionDetails();
TransactionDetail.DigitalContent digitalContent = transactionDetail.getDigtalContent(DigitalContentActivity.DigitalContentType.AUDIO);
try {
if (digitalContent != null) {
Uri audioUri = Uri.parse(digitalContent.getmThumbContent());
QLog.i("Play audio " + audioUri.getPath());
mediaPlayer = MediaPlayer.create(mContext, audioUri);
mediaPlayer.prepare();
updateMediaTime();
mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
@Override
public void onPrepared(MediaPlayer mediaPlayer) {
mediaPlayer.start();
mediaPlayer.seekTo(0);
finalTime = mediaPlayer.getDuration();
startTime = mediaPlayer.getCurrentPosition();
}
});
mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mediaPlayer) {
mediaPlayer.pause();
updateMediaUI();
startTime = 0;
seekbar.setProgress((int) startTime);
updateMediaTime();
}
});
}
} catch (Exception e) {
QLog.e(e);
}
}
private void updateMediaUI() {
if (mediaPlayer.isPlaying()) {
btn_Play.setBackgroundResource(R.drawable.digital_audio_pause);
} else {
btn_Play.setBackgroundResource(R.drawable.digital_audioplay);
startTime = mediaPlayer.getCurrentPosition();
seekbar.setProgress((int) startTime);
updateMediaTime();
}
}
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.btn_delete:
oneTimeOnly = 0;
transactionDetail.removeDigtalContent(DigitalContentActivity.DigitalContentType.AUDIO);
if (mediaPlayer != null) {
mediaPlayer.stop();
mediaPlayer.release();
mediaPlayer = null;
}
((ViewGroup) getParent()).removeView(this);
if (mFragment.get() != null) {
mFragment.get().removeDigitalContent(transactionDetail, DigitalContentActivity.DigitalContentType.AUDIO);
}
break;
case R.id.btn_play:
if (mediaPlayer.getDuration() <= 0) {
initMediaPlayer();
}
if (!mediaPlayer.isPlaying()) {
mediaPlayer.start();
if (finalTime <= 0) {
finalTime = mediaPlayer.getDuration();
}
startTime = mediaPlayer.getCurrentPosition();
if (oneTimeOnly == 0) {
seekbar.setMax((int) finalTime);
oneTimeOnly = 1;
}
updateMediaTime();
seekbar.setProgress((int) startTime);
durationHandler.postDelayed(updateSeekBarTime, 100);
} else {
mediaPlayer.pause();
durationHandler.removeCallbacks(updateSeekBarTime);
}
updateMediaUI();
break;
}
}
private void updateMediaTime() {
tv_total_duration.setText(String.format("%2d:%02d",
TimeUnit.MILLISECONDS.toMinutes((long) finalTime),
TimeUnit.MILLISECONDS.toSeconds((long) finalTime) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes((long) finalTime)))
);
tv_current_duration.setText(String.format("%2d:%02d",
TimeUnit.MILLISECONDS.toMinutes((long) startTime),
TimeUnit.MILLISECONDS.toSeconds((long) startTime) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes((long) startTime)))
);
}
//handler to change seekBarTime
private Runnable updateSeekBarTime = new Runnable() {
public void run() {
if (mediaPlayer == null) {
return;
}
if (mediaPlayer.isPlaying()) {
//get current position
startTime = mediaPlayer.getCurrentPosition();
//set seekbar progress
seekbar.setProgress((int) startTime);
//set time remaing
double timeRemaining = finalTime - startTime;
updateMediaTime();
//repeat yourself that again in 100 miliseconds
durationHandler.postDelayed(this, 100);
}else{
for (int i = mediaPlayer.getDuration(); i >= mediaPlayer.getCurrentPosition(); i--){
}
}
updateMediaUI();
}
};
@Override
public void pauseMedia() {
if (mediaPlayer != null) {
mediaPlayer.pause();
updateMediaUI();
durationHandler.removeCallbacks(updateSeekBarTime);
}
}
答案 2 :(得分：0)
你可以试试这个
holder.btPlay.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (mediaPlayer != null && mediaPlayer[0] != null && mediaPlayer[0].isPlaying()) {
mediaPlayer[0].stop();
mediaPlayer[0].release();
return;
}
mediaPlayer = new MediaPlayer[]{MediaPlayer.create(context, soundUri)};
mediaPlayer[0].setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
@Override
public void onPrepared(MediaPlayer mp) {mp.start();
}
});
mediaPlayer[0].setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
try {
mp.release();
} catch (Exception e) {
}
mediaPlayer[0] = null;
}
});
mediaPlayer[0].setOnErrorListener(new MediaPlayer.OnErrorListener() {
@Override
public boolean onError(MediaPlayer mp, int what, int extra) {
try {
mp.release();
} catch (Exception e) {
}
mediaPlayer[0] = null;
return false;}
});
}
}