我一直在测试为应用程序启动声音创建的基本媒体播放器。媒体是从我的 firebase 数据库中包含的 URL 中提取的。媒体播放器可以在较早的模拟器上运行，但不能在任何真实设备上运行。
错误代码是 MediaPlayer start called in state 0 (Error -38, 0)。 我读到这是因为在播放媒体之前 onprepare 没有准备好，所以我添加了一个 onPreparelistener 并且它仍然给出相同的错误。接下来我可以尝试什么？
public class harropMediaplayer {
MediaPlayer player;
String media;
Context c;
public harropMediaplayer(String media,Context c){
this.media = media;
this.c = c;
Log.i("Sound: ","Initalized");
}
public void volumeSetting(){
SharedPreferences sharedpreferences = PreferenceManager.getDefaultSharedPreferences(c);
boolean bnSoundMute = sharedpreferences.getBoolean("soundMute",false);
if(bnSoundMute==true){
mutevol();
Log.i("sound","muted");
}else{
volmax();
Log.i("sound","max vol");
}
}
public void plysound() {
player = new MediaPlayer();
Log.i("Url", media);
try {
player.setDataSource(media);
} catch (IOException e) {
e.printStackTrace();
}
catch (IllegalStateException o){
o.printStackTrace();
}
try {
player.prepare();
volumeSetting();
player.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
public void onPrepared(MediaPlayer mp) {
if (!mp.isPlaying()){
mp.start();
}
}
});
} catch (IOException e) {
e.printStackTrace();
}
Log.i("Sound playing", "Ok");
}
public void stopplying(){
player.stop();
}
public void volmax(){
player = App_Objects.mp;
player.setVolume(1,1);
}
public void mutevol(){
player = App_Objects.mp;
player.setVolume(0,0);
}
最佳答案
onPrepareListener 和准备不一样，你只需要调用:
mediaPlayer.prepare();
关于java - 媒体播放器返回错误并且没有声音播放，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/48873448/