NegativeArraySizeException Android中 [英] NegativeArraySizeException in Android
问题描述
我试图运行此code，却得到一个错误。谁能告诉我为什么吗？调试器显示以下
主题[3;>主]（暂停（例外NegativeArraySizeException））
ViewRoot.handleMessage（消息）行：1704
的ViewRoot（处理器）.dispatchMessage（消息）行：99
Looper.loop（）行：123
ActivityThread.main（字符串[]）行：4203
Method.invokeNative（对象，对象[]，上课，下课[]，类，整型，布尔）行：不可用[本机方法]
Method.invoke（对象，对象...）线：521
ZygoteInit $ MethodAndArgsCaller.run（）行：791
ZygoteInit.main（字符串[]）线：549
NativeStart.main（字符串[]）行：不可用[本机方法]
公共无效convertAudio（）抛出IOException
Log.d（文件，转换音频）;
java.io.File的fileExist =新的java.io.File（/ SD卡/，test1.3gp）;
java.io.File的fileNew =新的java.io.File（/ SD卡/，test2.3gp）;
如果（fileNew.exists（））{
的FileInputStream fExist =新的FileInputStream（fileExist）;
的FileInputStream fNew =新的FileInputStream（fileNew）; 长lengthExist = fileExist.length（）;
如果（lengthExist＆GT; Integer.MAX_VALUE的）{
//文件过大
}
字节[] = bytesExist新的字节[（INT）lengthExist] INT偏移= 0;
INT numRead = 0;
尝试{
而（偏移下; bytesExist.length＆放大器;及（numRead = fExist.read（bytesExist，胶印，bytesExist.length偏移））GT; = 0）{
胶印+ = numRead;
}
} {最后
} //确保所有字节已经阅读
如果（偏移＆LT; bytesExist.length）{
抛出新IOException异常（无法完全读取文件+ fileExist.getName（））;
}
字节[] = cleanExist convert3gpDataToAmr（bytesExist）; 长lengthNew = fileNew.length（）;
如果（lengthNew＆GT; Integer.MAX_VALUE的）{
//文件过大
}
字节[] = bytesNew新的字节[（INT）lengthNew] INT offsetNew = 0;
INT numReadNew = 0;
尝试{
而（偏移下; bytesNew.length＆放大器;及（numRead = fNew.read（bytesNew，offsetNew，bytesNew.length-offsetNew））GT; = 0）{
offsetNew + = numReadNew;
}
} {最后
} //确保所有字节已经阅读
如果（偏移＆LT; bytesNew.length）{
抛出新IOException异常（无法完全读取文件+ fileExist.getName（））;
}
字节[] = cleanNew convert3gpDataToAmr（bytesNew）; }
}
//＃！AMR \\ n
私有静态的byte [] AMR_MAGIC_HEADER = {0x23，0×21，×41，送出0x4d，0×52，的0x0A}; 公众的byte [] convert3gpDataToAmr（字节[]数据）{
如果（数据== NULL）{
返回null;
} ByteArrayInputStream的双=新ByteArrayInputStream的（数据）;
//读取FileTypeHeader
FileTypeBox ftypHeader =新FileTypeBox（之二）;
//您可以检查它是否是正确的在这里
//读取MediaDataHeader
MediaDataBox mdatHeader =新MediaDataBox（之二）;
//您可以检查它是否是正确的在这里
INT rawAmrDataLength = mdatHeader.getDataLength（）;
INT fullAmrDataLength = AMR_MAGIC_HEADER.length + rawAmrDataLength;
字节[] = amrData新的字节[fullAmrDataLength]
System.arraycopy（AMR_MAGIC_HEADER，0，amrData，0，AMR_MAGIC_HEADER.length）;
bis.read（amrData，AMR_MAGIC_HEADER.length，rawAmrDataLength）;
返回amrData;
}
}
我会检查是否 fullAmrDataLength 是否定的，因为那样的话
字节[] = amrData新的字节[fullAmrDataLength]
将导致 NegativeArraySizeException 。
I am trying to run this code, but get an error. Can anyone tell me why? The debugger shows the following
Thread [<3> main] (Suspended (exception NegativeArraySizeException)) ViewRoot.handleMessage(Message) line: 1704 ViewRoot(Handler).dispatchMessage(Message) line: 99 Looper.loop() line: 123 ActivityThread.main(String[]) line: 4203 Method.invokeNative(Object, Object[], Class, Class[], Class, int, boolean) line: not available [native method] Method.invoke(Object, Object...) line: 521 ZygoteInit$MethodAndArgsCaller.run() line: 791 ZygoteInit.main(String[]) line: 549 NativeStart.main(String[]) line: not available [native method]
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;
}
}
I would check if fullAmrDataLength is negative, because then
byte[] amrData = new byte[fullAmrDataLength];
would result in NegativeArraySizeException.
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