/**
* 文件读取
* @param is 文件的输入流
* @return 返回文件数组
*/
private byte[] read(InputStream is) {
//缓冲区inputStream
BufferedInputStream bis = null;
//用于存储数据
ByteArrayOutputStream baos = null;
try {
//每次读1024
byte[] b = new byte[1024];
//初始化
bis = new BufferedInputStream(is);
baos = new ByteArrayOutputStream();
int length;
while ((length = bis.read(b)) != -1) {
//bis.read()会将读到的数据添加到b数组
//将数组写入到baos中
baos.write(b, 0, length);
}
return baos.toByteArray();
} catch (IOException e) {
e.printStackTrace();
} finally {//关闭流
try {
if (bis != null) {
bis.close();
}
if (is != null) {
is.close();
}
if (baos != null) baos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
/**
* 将数据写入文件中
* @param buffer 写入数据
* @param fos 文件输出流
*/
private void write(byte[] buffer, FileOutputStream fos) {
//缓冲区OutputStream
BufferedOutputStream bos = null;
try {
//初始化
bos = new BufferedOutputStream(fos);
//写入
bos.write(buffer);
//刷新缓冲区
bos.flush();
} catch (IOException e) {
e.printStackTrace();
} finally {//关闭流
try {
if (bos != null) {
bos.close();
}
if (fos != null) {
fos.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
//获取文件输入流
InputStream mRaw = getResources().openRawResource(R.raw.core);
//读取文件
byte[] bytes = read(mRaw);
//创建文件(getFilesDir()路径在data/data/<包名>/files,需要root才能看到路径)
File file = new File(getFilesDir(), "hui.mp3");
boolean newFile = file.createNewFile();
//写入
if (bytes != null) {
FileOutputStream fos = openFileOutput("hui.mp3", Context.MODE_PRIVATE);
write(bytes, fos);
}
本文地址:https://blog.csdn.net/qq313629058/article/details/107582488
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