可能重复:
我想从文件中读取数据并将其解组到Parcel。在文档中并不清楚,FileInputStream是否具有读取其所有内容方法。为了实现这一点,我做了以下工作:
FileInputStream filein = context.openFileInput(FILENAME);
int read = 0;
int offset = 0;
int chunk_size = 1024;
int total_size = 0;
ArrayList<byte[]> chunks = new ArrayList<byte[]>();
chunks.add(new byte[chunk_size]);
//first I read data from file chunk by chunk
while ( (read = filein.read(chunks.get(chunks.size()-1), offset, buffer_size)) != -1) {
total_size+=read;
if (read == buffer_size) {
chunks.add(new byte[buffer_size]);
}
}
int index = 0;
// then I create big buffer
byte[] rawdata = new byte[total_size];
// then I copy data from every chunk in this buffer
for (byte [] chunk: chunks) {
for (byte bt : chunk) {
index += 0;
rawdata[index] = bt;
if (index >= total_size) break;
}
if (index>= total_size) break;
}
// and clear chunks array
chunks.clear();
// finally I can unmarshall this data to Parcel
Parcel parcel = Parcel.obtain();
parcel.unmarshall(rawdata,0,rawdata.length);
我认为这段代码看起来很丑陋,我的问题是:如何漂亮地将文件中的数据读取到byte[]中?:)
https://stackoverflow.com/questions/6058003
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