讀內存卡的文件
讀取圖片,視頻等媒體文件byte流,
public static byte[] readStream(String imagepath) throws Exception {
FileInputStream fs = new FileInputStream(imagepath);
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len = 0;
while (-1 != (len = fs.read(buffer))) {
outStream.write(buffer, 0, len);
}
outStream.close();
fs.close();
return outStream.toByteArray();
}
讀取文本文件,用Strng保存
public String readFile(String filename)
{
String content = null;
File file = new File(filename); //for ex foo.txt
try {
FileReader reader = new FileReader(file);
char[] chars = new char[(int) file.length()];
reader.read(chars);
content = new String(chars);
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
return content;
}
public void writeFile(String filePath,byte[] f){
try {
FileOutputStream out = new FileOutputStream(new File(filePath));
out.write(f);
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
public void writeFile(String filePath,String f){
FileWriter fw;
try {
fw = new FileWriter(filePath);
fw.write(f);
fw.close();
} catch (IOException e) {
e.printStackTrace();
}
}