[英]Android API 23 vs Android API 25 in MediaPlayer buffering speed
我在使MediaPlayer在API 23上正常工作時遇到一些問題。我已經在SAME WiFI網絡和/或蜂窩網絡上對此進行了測試,結果是相同的。 我正在使用MediaPlayer.prepareAsync()
准備流。 我已經將調試器附加到onPreparedListener()
並且它永遠不會運行。 請看下面的圖表。
Android API 25上的網絡使用情況
Android Studio的“監視器”選項卡中有圖像。 .mp3文件大約10秒長。 就像您看到的那樣,Android API 23每2到3秒僅緩慢加載一小部分歌曲。
當Android API 25在2秒內立即加載時。
主要問題是無限花費很長的時間才能將歌曲加載到Android API 23上。有人遇到類似的問題並且知道如何解決嗎? 我的部分代碼將在下面的代碼示例中
public class CustomMediaPlayer implements MediaPlayer.OnPreparedListener {
private Context context;
private MediaPlayer mediaPlayer;
private boolean mediaPlayerReady;
private MaterialDialog loadingDialog;
private MaterialDialog playingDialog;
private TextView textTime;
private SeekBar seekBar;
private Handler handler;
private Runnable updateSongTime;
private String audioFileTitle;
private String audioFileUrl;
private int customPlayerView;
public CustomMediaPlayer(Context context) {
this.context = context;
this.mediaPlayerReady = false;
}
public void setSongName(String audioFileTitle) {
this.audioFileTitle = audioFileTitle;
}
public void setSongUrl(String audioFileUrl) {
this.audioFileUrl = audioFileUrl;
}
public void setCustomView(int customPlayerView) {
this.customPlayerView = customPlayerView;
}
public void show() {
PrepareDialogs();
MediaPlayerCreate();
HandlerRunnableCreate();
MediaPlayerPrepare();
}
private void PrepareDialogs() {
this.loadingDialog = new MaterialDialog.Builder(this.context)
.title("Loading...")
.content("Please wait")
.progress(true, 0)
.cancelable(true)
.build();
this.loadingDialog.setOnCancelListener(new DialogInterface.OnCancelListener() {
@Override
public void onCancel(DialogInterface dialog) {
mediaPlayer.release();
handler.removeCallbacks(updateSongTime);
dialog.dismiss();
}
});
this.playingDialog = new MaterialDialog.Builder(this.context)
.title(this.audioFileTitle)
.customView(this.customPlayerView, false)
.neutralText("Close")
.onNeutral(new MaterialDialog.SingleButtonCallback() {
@Override
public void onClick(@NonNull MaterialDialog dialog, @NonNull DialogAction which) {
mediaPlayer.release();
handler.removeCallbacks(updateSongTime);
dialog.dismiss();
}
})
.cancelable(false)
.build();
this.playingDialog.getCustomView().findViewById(R.id.image_play_pause).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
ImageView image = (ImageView) v;
if(mediaPlayer.isPlaying()) {
image.setImageResource(R.drawable.ic_play);
mediaPlayer.pause();
} else {
image.setImageResource(R.drawable.ic_pause);
mediaPlayer.start();
}
v = image;
}
});
this.textTime = (TextView) this.playingDialog.getCustomView().findViewById(R.id.text_time);
this.seekBar = (SeekBar) this.playingDialog.getCustomView().findViewById(R.id.seek_bar);
this.seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
mediaPlayer.pause();
handler.removeCallbacks(updateSongTime);
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
mediaPlayer.seekTo(seekBar.getProgress());
mediaPlayer.start();
handler.postDelayed(updateSongTime, 100);
}
});
}
private void MediaPlayerCreate() {
this.mediaPlayer = new MediaPlayer();
this.mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
try {
this.mediaPlayer.setDataSource(this.audioFileUrl);
this.mediaPlayerReady = true;
} catch(IOException e) {
e.printStackTrace();
}
this.mediaPlayer.setOnPreparedListener(this);
}
private void HandlerRunnableCreate() {
this.handler = new Handler();
this.updateSongTime = new Runnable() {
public void run() {
try {
if (mediaPlayer.isPlaying()) {
int startTime = mediaPlayer.getCurrentPosition();
seekBar.setProgress(startTime);
seekBar.setMax(mediaPlayer.getDuration());
}
handler.postDelayed(this, 100);
} catch (IllegalStateException e) {
e.printStackTrace();
}
}
};
}
private void MediaPlayerPrepare() {
if (this.mediaPlayerReady) {
this.loadingDialog.show();
this.mediaPlayer.prepareAsync();
} else {
Toast.makeText(this.context, "Media Player not ready", Toast.LENGTH_LONG).show();
}
}
@Override
public void onPrepared(MediaPlayer mp) {
loadingDialog.dismiss();
mediaPlayer.start();
playingDialog.show();
handler.postDelayed(updateSongTime, 100);
}
}
經過HOURS的研究,我發現了這個問題,這對遇到此問題的任何人都非常有用。
我的文件URL如下所示: example.com/company example/files/audio.mp3
Android API 23及以下example.com/company example/files/audio.mp3
的問題在於,這被視為無效的URL。 您的網址應類似於以下example.com/company%20example/files/audio.mp3
一個簡單的解決方法是在String
上使用replaceAll()
,如下所示:
String url = oldUrl.replaceAll(" ", "%20")
請注意,當您的網址無效時,Android完全不會給出任何錯誤。 因此,請確保您的URL不包含任何空格。
編輯在使用無效的URL之后,這是可行的方法:
URL url = new URL(oldURL);
URI uri = new URI(url.getProtocol(), url.getUserInfo(), url.getHost(), url.getPort(), url.getPath(), url.getQuery(), url.getRef());
String encodedUrl = uri.toASCIIString();
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