错误在录制和播放音频

我的锻炼与下面的例子中http://androidgenuine.com/?tag=sound-record-android-modify-voice-on-android 错误在录制和播放音频

我在这些

while (isRecording) { 
    // grab the buffered input (mic) and write it to a file on the SD 
    int bufferReadResult = audioRecord.read(buffer, 0, bufferSize); 
    for (int i = 0; i&lt; bufferReadResult; i++) { 
    dos.writeShort(buffer[i]); 
}

和

while (isPlaying) { 
    for (int i = 0; i &lt; bufferSize; i++) { 
    // write the 'short' buffer blocks to the audiotrack 
    try { 
     short s = dis.readShort(); 
     buffer[i] = s; 
    } catch (EOFException eofe) { 
    isPlaying = false; 
}

其强制关闭下面的错误，我的logcat的是

<i> 

10-13 12:32:06.710: ERROR/AndroidRuntime(1615): FATAL EXCEPTION: main 
10-13 12:32:06.710: ERROR/AndroidRuntime(1615): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.voicemodulation/com.voicemodulation.Voicemodulation}: java.lang.ClassCastException: android.widget.Button 
10-13 12:32:06.710: ERROR/AndroidRuntime(1615):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1622) 
10-13 12:32:06.710: ERROR/AndroidRuntime(1615):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1638) 
10-13 12:32:06.710: ERROR/AndroidRuntime(1615):  at android.app.ActivityThread.access$1500(ActivityThread.java:117) 
10-13 12:32:06.710: ERROR/AndroidRuntime(1615):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:928) 
10-13 12:32:06.710: ERROR/AndroidRuntime(1615):  at android.os.Handler.dispatchMessage(Handler.java:99) 
10-13 12:32:06.710: ERROR/AndroidRuntime(1615):  at android.os.Looper.loop(Looper.java:123) 
10-13 12:32:06.710: ERROR/AndroidRuntime(1615):  at android.app.ActivityThread.main(ActivityThread.java:3647) 
10-13 12:32:06.710: ERROR/AndroidRuntime(1615):  at java.lang.reflect.Method.invokeNative(Native Method) 
10-13 12:32:06.710: ERROR/AndroidRuntime(1615):  at java.lang.reflect.Method.invoke(Method.java:507) 
10-13 12:32:06.710: ERROR/AndroidRuntime(1615):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 
10-13 12:32:06.710: ERROR/AndroidRuntime(1615):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 
10-13 12:32:06.710: ERROR/AndroidRuntime(1615):  at dalvik.system.NativeStart.main(Native Method) 
10-13 12:32:06.710: ERROR/AndroidRuntime(1615): Caused by: java.lang.ClassCastException: android.widget.Button 
10-13 12:32:06.710: ERROR/AndroidRuntime(1615):  at com.voicemodulation.Voicemodulation.onCreate(Voicemodulation.java:35) 
10-13 12:32:06.710: ERROR/AndroidRuntime(1615):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
10-13 12:32:06.710: ERROR/AndroidRuntime(1615):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1586) 
10-13 12:32:06.710: ERROR/AndroidRuntime(1615):  ... 11 more 
10-13 12:32:06.731: WARN/ActivityManager(60): Force finishing activity com.voicemodulation/.Voicemodulation 
10-13 12:32:07.249: WARN/ActivityManager(60): Activity pause timeout for HistoryRecord{40731828 com.voicemodulation/.Voicemodulation} 
10-13 12:32:15.125: WARN/ActivityManager(60): Launch timeout has expired, giving up wake lock! 
10-13 12:32:16.305: WARN/ActivityManager(60): Activity idle timeout for HistoryRecord{40731828 com.voicemodulation/.Voicemodulation} 
10-13 12:32:17.266: WARN/ActivityManager(60): Activity idle timeout for HistoryRecord{4060ebb8 com.example.calldemo/.Calldemo} 
10-13 12:32:26.358: WARN/ActivityManager(60): Activity destroy timeout for HistoryRecord{40731828 com.voicemodulation/.Voicemodulation} 
</i>

来源

2011-10-12 Shalini

请出示您的logcat的错误。 – Sujit

它是'lt'和'bufferSize'变量中的编译错误。 – Shalini

& lt小于符号“<”，它在发布教程期间已经转换了脚本生成的html代码。所以你可以添加“<”来代替& lt。

来源

2011-10-13 06:25:54 Sujit

非常感谢Sujit。现在它已被纠正。但现在它强制关闭，我认为一些许可失踪。 – Shalini

我还添加了这个权限。， – Shalini

的问题似乎是因为一些ClassCastException异常的位置在这条线

10-13 12:32:06.710: ERROR/AndroidRuntime(1615): Caused by: java.lang.ClassCastException: android.widget.Button

也许你正在尝试错误种姓的Widget。检查语法。

对于防爆。

Button b=(Button)findviewbyId(R.id.button);

可能被错误地初始化为，

Button b=(TextView)findviewbyId(R.id.button);

来源

2012-05-29 12:38:21

错误在录制和播放音频

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