关于java：使用Android点击按钮播放声音

Playing a sound on button click with Android

我知道有人问过这个问题的一千个不同版本，我查看了它们并尝试了这些建议，但没有一个奏效。我试图在单击按钮时播放声音，同时在屏幕上显示新文本。当我按下按钮时，我会切换文本，但声音从不播放。这是我的代码：

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public class MainActivity extends Activity {

Button button;
TextView text;
final MediaPlayer mp = new MediaPlayer();

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

button = (Button) findViewById(R.id.button);
text = (TextView) findViewById(R.id.answer);

button.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
try {
AssetFileDescriptor afd;
afd = getAssets().openFd("myaudio.mp3");
mp.setDataSource(afd.getFileDescriptor(),afd.getStartOffset(),afd.getLength());
mp.prepare();
mp.start();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
toggleString(v);
}
});
}

public void toggleString(View v) {
if(text.getText().toString().equals(getString(R.string.nothing)))
text.setText(R.string.answer);
else
text.setText(R.string.nothing);
}

这是我的活动 xml 文件：

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如果有人可以提供帮助，那就太好了。提前致谢。

编辑：这是我在尝试第二个建议后在控制台中看到的(这是打印堆栈吗？对不起，我不知道那是什么)

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[2014–02–08 15:17:14 – ddmlib] An established connection was aborted by the software in your host machine
java.io.IOException: An established connection was aborted by the software in your host machine
at sun.nio.ch.SocketDispatcher.write0(Native Method)
at sun.nio.ch.SocketDispatcher.write(Unknown Source)
at sun.nio.ch.IOUtil.writeFromNativeBuffer(Unknown Source)
at sun.nio.ch.IOUtil.write(Unknown Source)
at sun.nio.ch.SocketChannelImpl.write(Unknown Source)
at com.android.ddmlib.JdwpPacket.writeAndConsume(JdwpPacket.java:213)
at com.android.ddmlib.Client.sendAndConsume(Client.java:642)
at com.android.ddmlib.HandleHeap.sendREAQ(HandleHeap.java:348)
at com.android.ddmlib.Client.requestAllocationStatus(Client.java:488)
at com.android.ddmlib.DeviceMonitor.createClient(DeviceMonitor.java:835)
at com.android.ddmlib.DeviceMonitor.openClient(DeviceMonitor.java:803)
at com.android.ddmlib.DeviceMonitor.processIncomingJdwpData(DeviceMonitor.java:763)
at com.android.ddmlib.DeviceMonitor.deviceClientMonitorLoop(DeviceMonitor.java:652)
at com.android.ddmlib.DeviceMonitor.access$100(DeviceMonitor.java:44)
at com.android.ddmlib.DeviceMonitor$3.run(DeviceMonitor.java:580)

[2014–02–08 15:19:44 – ddms] Can‘t bind to local 8600 for debugger
[2014-02-08 15:19:44 – ddms] Can’t bind to local 8602 for debugger
[2014–02–08 15:19:44 – ddms] Can‘t bind to local 8603 for debugger
[2014-02-08 15:19:44 – ddms] Can’t bind to local 8604 for debugger
[2014–02–08 15:19:44 – ddms] Can‘t bind to local 8605 for debugger
[2014-02-08 15:19:44 – ddms] Can’t bind to local 8606 for debugger
[2014–02–08 15:19:44 – ddms] Can‘t bind to local 8607 for debugger
[2014-02-08 15:19:44 – ddms] Can’t bind to local 8608 for debugger

您必须设置数据源并准备一次媒体播放器。

试试这个：

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@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

button = (Button) findViewById(R.id.button);
text = (TextView) findViewById(R.id.answer);

AssetFileDescriptor afd;
try {
afd = getAssets().openFd("myaudio.mp3");
mp.setDataSource(afd.getFileDescriptor(),afd.getStartOffset(),afd.getLength());
mp.prepare();
} catch (IOException e1) {
e1.printStackTrace();
}

button.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
try {
mp.start();

} catch (IllegalStateException e) {
e.printStackTrace();
}
}
});

}

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#import android.media.MediaPlayer;

public class MainActivity extends Activity {

MediaPlayer mySound;
@override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mySound = MediaPlayer.create(MainActivity.this, R.raw.blop);
button = (Button) findViewById(R.id.button);
button.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
try {
mySound.start();
} catch (NullPointerException e) {
mySound = MediaPlayer.create(MainActivity.this, R.raw.blop);
/* Optional */ // mySound.start();
}
toggleString(v);
}
});
}

尝试将声音文件保存在原始文件夹中，而不是资产，然后在活动中调用 MediaPlayer.create。在上面的示例中，原始文件夹中的声音文件名为 blop。

原创文章，作者：ItWorker，如若转载，请注明出处：https://blog.ytso.com/267521.html

关于java：使用Android点击按钮播放声音

Playing a sound on button click with Android

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