以图片地址下载图片
读取给定图片文件的内容，用FileInputStream
public static byte[] mReaderPicture(String filePath) {
byte[] arr = null;
try {
File file = new File(filePath);
FileInputStream fReader = new FileInputStream(file);
arr = new byte[1024*100];
fReader.read(arr);
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
return arr;
}
根据byte数组，创建一张新图。
public static void mWriterPicture(String newFileName,byte[] b){
try {
File file = new File(newFileName);
FileOutputStream fStream = new FileOutputStream(file);
fStream.write(b);
fStream.close();
System.out.println("图片创建成功 "+b.length);
} catch (Exception e) {
// TODO: handle exception
}
}
获取指定网址的图片，返回其byte[]
public static byte[] mReaderPictureToInternet(String strUr1){
byte[] imgData = null;
URL url;
try {
url = new URL(strUr1);
URLConnection connection = url.openConnection();
int length = (int)connection.getContentLength();
InputStream is = connection.getInputStream();
if (length!=-1) {
imgData = new byte[length];
byte[] temp = new byte[500*1024];
int readLen = 0;
int destPos = 0;
while ((readLen = is.read(temp))>0) {
System.arraycopy(temp, 0, imgData, destPos, readLen);
//arraycopy(Object src, int srcPos, Object dest, int destPos, int length)
//从指定源数组中复制一个数组，复制从指定的位置开始，到目标数组的指定位置结束
destPos+=readLen;
}
}
return imgData;
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return imgData;
}
直接获取指定网址的图片
public static void DownPictureToInternet(String filePath,String strUr1){
try {
URL url = new URL(strUr1);
InputStream fStream = url.openConnection().getInputStream();
int b = 0;
FileOutputStream fos = new FileOutputStream(new File(filePath));
while ((b=fStream.read())!=-1) {
fos.write(b);
}
fStream.close();
fos.close();
} catch (Exception e) {
e.printStackTrace();
}
}
应用：
public static void main(String[] args) {
mWriterPicture("test/1.jpg", mReaderPicture("res/me.jpg"));
mWriterPicture("test/2.jpg", mReaderPictureToInternet(
"http://pic2.desk.chinaz.com/file/201209/7/qinghimingyue4_p.jpg"));
DownPictureToInternet("test/下载.jpg",
"http://img3.100bt.com/upload/ttq/20130205/1360069663700.jpg");
}
源码下载：
http://download.csdn.net/detail/oyuntaolianwu/5804447
