我尝试运行这段代码，但是出现了错误。有人能告诉我为什么吗？调试器显示如下：
线程[<3> main]（暂停（异常NegativeArraySizeException）） ViewRoot.handleMessage（消息）行：1704 ViewRoot（处理程序）。dispatchMessage（消息）行：99 Looper.loop()行：123 ActivityThread.main(String[]) 行：4203 Method.invokeNative（Object，Object[]，Class，Class[]，Class，int，boolean）行：不可用[原生方法] Method.invoke(Object，Object ...）line: 521 ZygoteInit $ MethodAndArgsCaller.run() line：791 ZygoteInit.main(String[]) 行：549 NativeStart.main(String[]) 行：不可用[本地方法]
public void convertAudio () throws IOException {
Log.d("FILE", "Converting Audio");
java.io.File fileExist = new java.io.File("/sdcard/" , "test1.3gp");
java.io.File fileNew = new java.io.File("/sdcard/" , "test2.3gp");
if (fileNew.exists()) {
FileInputStream fExist = new FileInputStream(fileExist);
FileInputStream fNew = new FileInputStream(fileNew);
long lengthExist = fileExist.length();
if (lengthExist > Integer.MAX_VALUE) {
// File is too large
}
byte[] bytesExist = new byte[(int)lengthExist];
int offset = 0;
int numRead = 0;
try {
while (offset < bytesExist.length && (numRead=fExist.read(bytesExist, offset, bytesExist.length-offset)) >= 0) {
offset += numRead;
}
} finally {
}
// Ensure all the bytes have been read in
if (offset < bytesExist.length) {
throw new IOException("Could not completely read file "+fileExist.getName());
}
byte[] cleanExist = convert3gpDataToAmr(bytesExist);
long lengthNew = fileNew.length();
if (lengthNew > Integer.MAX_VALUE) {
// File is too large
}
byte[] bytesNew = new byte[(int)lengthNew];
int offsetNew = 0;
int numReadNew = 0;
try {
while (offset < bytesNew.length && (numRead=fNew.read(bytesNew, offsetNew, bytesNew.length-offsetNew)) >= 0) {
offsetNew += numReadNew;
}
} finally {
}
// Ensure all the bytes have been read in
if (offset < bytesNew.length) {
throw new IOException("Could not completely read file "+fileExist.getName());
}
byte[] cleanNew = convert3gpDataToAmr(bytesNew);
}
}
// #!AMR\n
private static byte[] AMR_MAGIC_HEADER = {0x23, 0x21, 0x41, 0x4d, 0x52, 0x0a};
public byte[] convert3gpDataToAmr(byte[] data) {
if (data == null) {
return null;
}
ByteArrayInputStream bis = new ByteArrayInputStream(data);
// read FileTypeHeader
FileTypeBox ftypHeader = new FileTypeBox(bis);
// You can check if it is correct here
// read MediaDataHeader
MediaDataBox mdatHeader = new MediaDataBox(bis);
// You can check if it is correct here
int rawAmrDataLength = mdatHeader.getDataLength();
int fullAmrDataLength = AMR_MAGIC_HEADER.length + rawAmrDataLength;
byte[] amrData = new byte[fullAmrDataLength];
System.arraycopy(AMR_MAGIC_HEADER, 0, amrData, 0, AMR_MAGIC_HEADER.length);
bis.read(amrData, AMR_MAGIC_HEADER.length, rawAmrDataLength);
return amrData;
}
}