java在Android上播放按钮点击的声音
我知道这个问题有一千种不同的版本被问过,我已经看了一遍并尝试了这些建议,但没有一个有效。我试图在点击按钮时播放声音,同时在屏幕上显示新文本。当我按下按钮时,我可以切换文本,但声音永远不会播放。这是我的代码:
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:
<TextView
安卓:id="@+id/answer"
安卓:layout_width="fill_parent"
安卓:layout_height="wrap_content"
安卓:gravity="center"
安卓:text="@string/nothing"
安卓:textSize="40sp"
安卓:layout_marginTop="40dp"
/>
<Button
安卓:id="@+id/button"
安卓:layout_width="fill_parent"
安卓:layout_height="wrap_content"
安卓:layout_marginTop="130dp"
安卓:onClick="onClick"
安卓:text="@string/question"
/>
如果有人能帮忙,那就太好了。提前谢谢
编辑:这是我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)
[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.安卓.ddmlib.JdwpPacket.writeAndConsume(JdwpPacket.java:213)
at com.安卓.ddmlib.Client.sendAndConsume(Client.java:642)
at com.安卓.ddmlib.HandleHeap.sendREAQ(HandleHeap.java:348)
at com.安卓.ddmlib.Client.requestAllocationStatus(Client.java:488)
at com.安卓.ddmlib.DeviceMonitor.createClient(DeviceMonitor.java:835)
at com.安卓.ddmlib.DeviceMonitor.openClient(DeviceMonitor.java:803)
at com.安卓.ddmlib.DeviceMonitor.processIncomingJdwpData(DeviceMonitor.java:763)
at com.安卓.ddmlib.DeviceMonitor.deviceClientMonitorLoop(DeviceMonitor.java:652)
at com.安卓.ddmlib.DeviceMonitor.access$100(DeviceMonitor.java:44)
at com.安卓.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
# 1 楼答案
尝试将声音文件保存在原始文件夹中,然后致电MediaPlayer,而不是资产。在你的活动中创造。在上面的示例中,原始文件夹中的声音文件名为blop
# 2 楼答案
您必须一次性设置数据源并准备媒体播放器
试试这个: