使用媒体播放器同时播放多个音频

Question

我同时播放两个MediaPlayers时遇到了问题。

在我的代码中，我做了一个spinner，让用户选择他的第一首歌，然后是第二首歌，在用户选择第一首歌曲的那一刻，它开始播放，当用户选择第二首歌时，它将播放第一首歌。

但问题是，当用户点击第二首歌时，它会停止第一首歌......

我能做些什么来修复它？

泰！

代码：

public void setSpinner() {
Spinner spine = (Spinner) findViewById(R.id.spinner3);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.song, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spine.setAdapter(adapter);
final MediaPlayer mp1 = new MediaPlayer();
spine.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener()
{
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
String st = parent.getItemAtPosition(position).toString();
if (st.equals("First Song")) {
setMedia1(mp1);
mp1.start();
}
if (st.equals("Second Song")) {
setMedia2(mp1);
mp1.start();
}
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
}
public void setMedia1(MediaPlayer mp2) {
Bundle b1=getIntent().getExtras();
float s = b1.getFloat("speed");
Bundle b2=getIntent().getExtras();
float v = b2.getFloat("volume");
try {
String s1 = getIntent().getStringExtra("song1");
final Uri uri1 = Uri.parse(s1);
mp2.setDataSource(getApplicationContext(), uri1);
mp2.prepare();
mp2.setVolume(v,v);
mp2.setPlaybackParams(mp2.getPlaybackParams().setSpeed(s));
} catch (Exception e) {
}
}
public void setMedia2(MediaPlayer mp2) {
Bundle b3 = getIntent().getExtras();
float sp1 = b3.getFloat("speed1");
Bundle b4 = getIntent().getExtras();
float vo1 = b4.getFloat("volume1");
try {
String s2 = getIntent().getStringExtra("song3");
final Uri uri2 = Uri.parse(s2);
mp2.setDataSource(getApplicationContext(), uri2);
mp2.prepare();
mp2.setVolume(vo1, vo1);
mp2.setPlaybackParams(mp2.getPlaybackParams().setSpeed(sp1));
} catch (Exception e) {
}
}

Answer 1

尝试SoundPool，这是同时处理多个音频文件的更好方法。

以下是文档：

http://developer.android.com/reference/android/media/SoundPool.html

下面是示例：

http://examples.javacodegeeks.com/android/android-soundpool-example

希望这有帮助

参考

Answer 2

尝试使用两个MediaPlayer实例。更改setSpinner方法以执行以下操作：

public void setSpinner() {
Spinner spine = (Spinner)findViewById(R.id.spinner3);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.song, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spine.setAdapter(adapter);
// You were only creating a single MediaPlayer instance in your version...
final MediaPlayer mpA = new MediaPlayer();
final MediaPlayer mpB = new MediaPlayer();
spine.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener()
{
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
String st = parent.getItemAtPosition(position).toString();
if (st.equals("First Song")) {
// Use mpA for the first song
setMedia1(mpA);
mpA.start();
}
else if (st.equals("Second Song")) {
// Use mpB for the second song
setMedia2(mpB);
mpB.start();
}
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
}

我不知道这是否会得到您正在寻找的确切行为，但它同时播放两首歌曲比使用单个MediaPlayer实例更有可能。