在一个android音板如何使一个声音停止播放后,另一个点击?
问题描述:
我该如何修改它,以便如果一个声音已经播放而另一个声音被点击,那么以前停止播放并且新选择的开始播放?感谢大家提前帮助他们。 (这是不是所有的代码只是最重要的)在一个android音板如何使一个声音停止播放后,另一个点击?
public class newBoard extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.main);
Toast.makeText(this, "Thank you for using this App.", Toast.LENGTH_LONG).show();
// ads - load request to display
AdView layout = (AdView)this.findViewById(R.id.adView);
// ads - load display with an ad
AdRequest adRequest = new AdRequest();
adRequest.setTesting(true);
layout.loadAd(adRequest);
// import sound files
final MediaPlayer sound01 = MediaPlayer.create(this, R.raw.sound01);
final MediaPlayer sound02 = MediaPlayer.create(this, R.raw.sound02);
final MediaPlayer sound03 = MediaPlayer.create(this, R.raw.sound03);
final MediaPlayer sound04 = MediaPlayer.create(this, R.raw.sound04);
final MediaPlayer sound05 = MediaPlayer.create(this, R.raw.sound05);
final MediaPlayer sound06 = MediaPlayer.create(this, R.raw.sound06);
final MediaPlayer sound07 = MediaPlayer.create(this, R.raw.sound07);
final MediaPlayer sound08 = MediaPlayer.create(this, R.raw.sound08);
final MediaPlayer sound09 = MediaPlayer.create(this, R.raw.sound09);
final MediaPlayer sound10 = MediaPlayer.create(this, R.raw.sound10);
final MediaPlayer sound11 = MediaPlayer.create(this, R.raw.sound11);
final MediaPlayer sound12 = MediaPlayer.create(this, R.raw.sound12);
final MediaPlayer sound13 = MediaPlayer.create(this, R.raw.sound13);
final MediaPlayer sound14 = MediaPlayer.create(this, R.raw.sound14);
final MediaPlayer sound15 = MediaPlayer.create(this, R.raw.sound15);
final MediaPlayer sound16 = MediaPlayer.create(this, R.raw.sound16);
final MediaPlayer sound17 = MediaPlayer.create(this, R.raw.sound17);
final MediaPlayer sound18 = MediaPlayer.create(this, R.raw.sound18);
final MediaPlayer sound19 = MediaPlayer.create(this, R.raw.sound19);
final MediaPlayer sound20 = MediaPlayer.create(this, R.raw.sound20);
final MediaPlayer sound21 = MediaPlayer.create(this, R.raw.sound21);
final MediaPlayer sound22 = MediaPlayer.create(this, R.raw.sound22);
final MediaPlayer sound23 = MediaPlayer.create(this, R.raw.sound23);
final MediaPlayer sound24 = MediaPlayer.create(this, R.raw.sound24);
final MediaPlayer sound25 = MediaPlayer.create(this, R.raw.sound25);
// play sound files on clicks
Button s01 = (Button) findViewById(R.id.button01);
s01.setText(this.getString(R.string.quote01));
s01.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
try {
sound01.prepare();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
sound01.start();
}
});
registerForContextMenu(s01);
Button s02 = (Button) findViewById(R.id.button02);
s02.setText(this.getString(R.string.quote02));
s02.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
try {
sound02.prepare();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
sound02.start();
}
});
registerForContextMenu(s02);
Button s03 = (Button) findViewById(R.id.button03);
s03.setText(this.getString(R.string.quote03));
s03.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
try {
sound03.prepare();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
sound03.start();
}
});
registerForContextMenu(s03);
Button s04 = (Button) findViewById(R.id.button04);
s04.setText(this.getString(R.string.quote04));
s04.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
try {
sound04.prepare();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
sound04.start();
}
});
registerForContextMenu(s04);
Button s05 = (Button) findViewById(R.id.button05);
s05.setText(this.getString(R.string.quote05));
s05.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
try {
sound05.prepare();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
sound05.start();
}
});
registerForContextMenu(s05);
Button s06 = (Button) findViewById(R.id.button06);
s06.setText(this.getString(R.string.quote06));
s06.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
try {
sound06.prepare();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
sound06.start();
}
});
registerForContextMenu(s06);
答
使用对象的成员变量来保存到您的当前播放声音,使您可以拨打stop()
,不要忘记为null检查。一旦您离开您的活动,请不要忘记release()
您的MediaPlayer
对象。
以下可能是一个更好的设计:将所有音频文件移动到您的资产目录,并将文件名放在按钮的标记中,使用相同的单击事件处理程序获取一个MediaPlayer对象的状态,并将其停止它正在播放,将新文件设置为从按钮的标签播放并播放文件。这将显着减少重复的代码。
答
使用单个MediaPlayer
实例。你的设备在大多数设备上都会失败,因为无论如何分配给MediaPlayer
的许多实例都是如此。而且,重复的代码很糟糕。糟糕的不好:
public class NewBoard extends Activity {
private MediaPlayer player;
private Resources res;
private int buttonIds = { R.id.button01, R.id.button02, R.id.button03,
R.id.button04, R.id.button05, R.id.button06,
R.id.button07, R.id.button08, R.id.button09,
R.id.button10, R.id.button11, R.id.button12,
R.id.button13, R.id.button14, R.id.button15,
R.id.button16, R.id.button16, R.id.button17,
R.id.button18, R.id.button19, R.id.button20,
R.id.button21, R.id.button22, R.id.button23,
R.id.button24, R.id.button25 };
private int soundIds = { R.raw.sound01, R.raw.sound02, R.raw.sound03,
R.raw.sound04, R.raw.sound05, R.raw.sound06,
R.raw.sound07, R.raw.sound08, R.raw.sound09,
R.raw.sound10, R.raw.sound11, R.raw.sound12,
R.raw.sound13, R.raw.sound14, R.raw.sound15,
R.raw.sound16, R.raw.sound16, R.raw.sound17,
R.raw.sound18, R.raw.sound19, R.raw.sound20,
R.raw.sound21, R.raw.sound22, R.raw.sound23,
R.raw.sound24, R.raw.sound25 };
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.main);
//Kill this with fire -- just an unnecessary user annoyance.
Toast.makeText(this,
"Thank you for using this App.", Toast.LENGTH_LONG).show();
AdView layout = (AdView)findViewById(R.id.adView);
AdRequest adRequest = new AdRequest();
adRequest.setTesting(true);
layout.loadAd(adRequest);
player = new MediaPlayer();
res = getResources();
for(int i = 0, n = buttonIds.length(); i < n; i++) {
Button button = (Button)findViewById(buttonIds[i]);
button.setOnClickListener(new SoundClickListener(soundIds[i]));
}
}
private class SoundClickListener implements OnClickListener {
private int id;
public SoundClickListener(int soundId) {
id = soundId;
}
public void onClick(View v) {
player.reset();
player.setDataSource(
res.openRawResourceFd(id).getFileDescriptor());
player.prepare();
player.start();
}
}
}
就像这样。可能或不可以按原样编译。另外,正如所评论的,用火烧掉Toast
--这只是令人讨厌。