Android 录制和播放音频时出错

我用下面的例子来练习

我在这些方面有以下错误

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< bufferReadResult; i++) {
    dos.writeShort(buffer[i]);
}

及

它的力很近，我的logcat

<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>

10-13 12:32:06.710:错误/AndroidRuntime（1615）：致命异常：主
10-13 12:32:06.710:错误/AndroidRuntime（1615）：java.lang.RuntimeException:无法启动活动组件信息{com.voicemodulation/com.voicemodulation.voicemodulation}:java.lang.ClassCastException:android.widget.Button
10-13 12:32:06.710:ERROR/AndroidRuntime（1615）：在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:1622）
10-13 12:32:06.710:ERROR/AndroidRuntime（1615）：位于android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:1638）
10-13 12:32:06.710:ERROR/AndroidRuntime（1615）：在android.app.ActivityThread.access$1500（ActivityThread.java:117）
10-13 12:32:06.710:ERROR/AndroidRuntime（1615）：在android.app.ActivityThread$H.handleMessage（ActivityThread.java:928）
10-13 12:32:06.710:ERROR/AndroidRuntime（1615）：在android.os.Handler.dispatchMessage（Handler.java:99）上
10-13 12:32:06.710:ERROR/AndroidRuntime（1615）：在android.os.Looper.loop（Looper.java:123）上
10-13 12:32:06.710:ERROR/AndroidRuntime（1615）：位于android.app.ActivityThread.main（ActivityThread.java:3647）
10-13 12:32:06.710:ERROR/AndroidRuntime（1615）：位于java.lang.reflect.Method.invokenactive（本机方法）
10-13 12:32:06.710:ERROR/AndroidRuntime（1615）：位于java.lang.reflect.Method.invoke（Method.java:507）
10-13 12:32:06.710:ERROR/AndroidRuntime（1615）：在com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run（ZygoteInit.java:839）
10-13 12:32:06.710:ERROR/AndroidRuntime（1615）：位于com.android.internal.os.ZygoteInit.main（ZygoteInit.java:597）
10-13 12:32:06.710:ERROR/AndroidRuntime（1615）：在dalvik.system.NativeStart.main（本机方法）
10-13 12:32:06.710:错误/AndroidRuntime（1615）：由以下原因引起：java.lang.ClassCastException:android.widget.Button
10-13 12:32:06.710:ERROR/AndroidRuntime（1615）：位于com.voicemodulation.voicemodulation.onCreate（voicemodulation.java:35）
10-13 12:32:06.710:ERROR/AndroidRuntime（1615）：在android.app.Instrumentation.callActivityOnCreate（Instrumentation.java:1047）
10-13 12:32:06.710:ERROR/AndroidRuntime（1615）：在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:1586）
10-13 12:32:06.710:错误/AndroidRuntime（1615）：。。。还有11个
10-13 12:32:06.731:WARN/ActivityManager（60）：强制完成活动com.voicemodulation/.voicemodulation
10-13 12:32:07.249:WARN/ActivityManager（60）：历史记录{40731828 com.voicemodulation/.voicemodulation}的活动暂停超时
10-13 12:32:15.125:警告/活动管理器（60）：启动超时已过期，放弃唤醒锁定！
10-13 12:32:16.305:WARN/ActivityManager（60）：历史记录{40731828 com.voicemodulation/.voicemodulation}的活动空闲超时
10-13 12:32:17.266:WARN/ActivityManager（60）：历史记录{4060ebb8 com.example.calldemo/.calldemo}的活动空闲超时
10-13 12:32:26.358:WARN/ActivityManager（60）：历史记录{40731828 com.voicemodulation/.voicemodulation}的活动销毁超时

<是小于符号“问题似乎是由于此行中的某些ClassCastException

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

也许你试图对一个小部件进行错误的分类。检查语法

例如

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

可能被错误地初始化为

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

---

请显示您的logcat错误。这是'lt'和'bufferSize'变量中的编译错误。非常感谢Sujit。现在它已被更正。但现在它强制关闭我认为缺少一些权限。我还添加了此命令。，

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