android 写文件Demo

File file = new File("/mnt/sdcard/tuhuolong.txt");
FileOutputStream outputStream = null;
try {           
outputStream = new FileOutputStream(file,true);
int len = 0;
byte[] buf = new byte[1024];
InputStream inputstream =entity.getContent();
while ((len = inputstream.read(buf)) > 0) {
outputStream.write(buf, 0, len);
}
outputStream.close();
} catch (Exception e) {}




File file = new File("/mnt/sdcard/tuhuolong.txt");
FileOutputStream outputStream = null;
String result = "";
try {           
    outputStream = new FileOutputStream(file,true);
    byte[] buf = result.getBytes();
    int len = buf.length;
    outputStream.write(buf, 0, len);
    outputStream.close();
} catch (Exception e) {}