/**
* 获取真实文件名（xx.后缀），通过网络获取.
*
* @param connection 连接
* @return 文件名
*/
public static String getRealFileName(HttpURLConnection connection) {
String name = null;
try {
if (connection == null) {
return name;
}
if (connection.getResponseCode() == 200) {
for (int i = 0; ; i++) {
String mime = connection.getHeaderField(i);
if (mime == null) {
break;
}
// "Content-Disposition","attachment; filename=1.txt"
// Content-Length
if ("content-disposition".equals(connection.getHeaderFieldKey(i).toLowerCase())) {
Matcher m = Pattern.compile(".*filename=(.*)").matcher(mime.toLowerCase());
if (m.find()) {
return m.group(1).replace("\"", "");
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
AbLogUtil.e(AbFileUtil.class, "网络上获取文件名失败");
}
return name;
}
/**
* 描述：获取网络文件的大小.
*
* @param Url 图片的网络路径
* @return int 网络文件的大小
*/
public static int getContentLengthFromUrl(String Url) {
int mContentLength = 0;
try {
URL url = new URL(Url);
HttpURLConnection mHttpURLConnection = (HttpURLConnection) url.openConnection();
mHttpURLConnection.setConnectTimeout(5 * 1000);
mHttpURLConnection.setRequestMethod("GET");
mHttpURLConnection.setRequestProperty(
"Accept",
"image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*");
mHttpURLConnection.setRequestProperty("Accept-Language", "zh-CN");
mHttpURLConnection.setRequestProperty("Referer", Url);
mHttpURLConnection.setRequestProperty("Charset", "UTF-8");
mHttpURLConnection.setRequestProperty(
"User-Agent",
"Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.2; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)");
mHttpURLConnection.setRequestProperty("Connection", "Keep-Alive");
mHttpURLConnection.connect();
if (mHttpURLConnection.getResponseCode() == 200) {
// 根据响应获取文件大小
mContentLength = mHttpURLConnection.getContentLength();
}
} catch (Exception e) {
e.printStackTrace();
AbLogUtil.d(AbFileUtil.class, "获取长度异常：" + e.getMessage());
}
return mContentLength;
}
/**
* 描述：获取src中的图片资源.
*
* @param src 图片的src路径，如（“image/arrow.png”）
* @return Bitmap 图片
*/
public static Bitmap getBitmapFromSrc(String src) {
Bitmap bit = null;
try {
bit = BitmapFactory.decodeStream(AbFileUtil.class.getResourceAsStream(src));
} catch (Exception e) {
AbLogUtil.d(AbFileUtil.class, "获取图片异常：" + e.getMessage());
}
return bit;
}
/**
* 描述：根据URL从互连网获取图片.
*
* @param url 要下载文件的网络地址
* @param type 图片的处理类型（剪切或者缩放到指定大小，参考AbConstant类）
* @param desiredWidth 新图片的宽
* @param desiredHeight 新图片的高
* @return Bitmap 新图片
*/
public static Bitmap getBitmapFromURL(String url, int type, int desiredWidth, int desiredHeight) {
Bitmap bit = null;
try {
bit = AbImageUtil.getBitmap(url, type, desiredWidth, desiredHeight);
} catch (Exception e) {
AbLogUtil.d(AbFileUtil.class, "下载图片异常：" + e.getMessage());
}
return bit;
}
/**
* 描述：获取Asset中的图片资源.
*
* @param context the context
* @param fileName the file name
* @return Drawable 图片
*/
public static Drawable getDrawableFromAsset(Context context, String fileName) {
Drawable drawable = null;
try {
AssetManager assetManager = context.getAssets();
InputStream is = assetManager.open(fileName);
drawable = Drawable.createFromStream(is, null);
} catch (Exception e) {
AbLogUtil.d(AbFileUtil.class, "获取图片异常：" + e.getMessage());
}
return drawable;
}
/**
* 描述：获取Asset中的图片资源.
*
* @param context the context
* @param fileName the file name
* @return Bitmap 图片
*/
public static Bitmap getBitmapFromAsset(Context context, String fileName) {
Bitmap bit = null;
try {
AssetManager assetManager = context.getAssets();
InputStream is = assetManager.open(fileName);
bit = BitmapFactory.decodeStream(is);
} catch (Exception e) {
AbLogUtil.d(AbFileUtil.class, "获取图片异常：" + e.getMessage());
}
return bit;
}
/**
* 获取真实文件名（xx.后缀），通过网络获取.
*
* @param response the response
* @return 文件名
*/
public static String getRealFileName(HttpResponse response) {
String name = null;
try {
if (response == null) {
return name;
}
// 获取文件名
Header[] headers = response.getHeaders("content-disposition");
for (int i = 0; i < headers.length; i++) {
Matcher m = Pattern.compile(".*filename=(.*)").matcher(headers[i].getValue());
if (m.find()) {
name = m.group(1).replace("\"", "");
}
}
} catch (Exception e) {
e.printStackTrace();
AbLogUtil.e(AbFileUtil.class, "网络上获取文件名失败");
}
return name;
}
/**
* 获取文件名，通过网络获取.
*
* @param url 文件地址
* @return 文件名
*/
public static String getRealFileNameFromUrl(String url) {
String name = null;
try {
if (AbStrUtil.isEmpty(url)) {
return name;
}
URL mUrl = new URL(url);
HttpURLConnection mHttpURLConnection = (HttpURLConnection) mUrl.openConnection();
mHttpURLConnection.setConnectTimeout(5 * 1000);
mHttpURLConnection.setRequestMethod("GET");
mHttpURLConnection.setRequestProperty(
"Accept",
"image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*");
mHttpURLConnection.setRequestProperty("Accept-Language", "zh-CN");
mHttpURLConnection.setRequestProperty("Referer", url);
mHttpURLConnection.setRequestProperty("Charset", "UTF-8");
mHttpURLConnection.setRequestProperty("User-Agent", "");
mHttpURLConnection.setRequestProperty("Connection", "Keep-Alive");
mHttpURLConnection.connect();
if (mHttpURLConnection.getResponseCode() == 200) {
for (int i = 0; ; i++) {
String mine = mHttpURLConnection.getHeaderField(i);
if (mine == null) {
break;
}
if ("content-disposition".equals(mHttpURLConnection.getHeaderFieldKey(i).toLowerCase())) {
Matcher m = Pattern.compile(".*filename=(.*)").matcher(mine.toLowerCase());
if (m.find()) return m.group(1).replace("\"", "");
}
}
}
} catch (Exception e) {
e.printStackTrace();
AbLogUtil.e(AbFileUtil.class, "网络上获取文件名失败");
}
return name;
}
/**
* 下载网络文件到SD卡中.如果SD中存在同名文件将不再下载
*
* @param url 要下载文件的网络地址
* @param dirPath the dir path
* @return 下载好的本地文件地址
*/
public static String downloadFile(String url, String dirPath) {
InputStream in = null;
FileOutputStream fileOutputStream = null;
HttpURLConnection connection = null;
String downFilePath = null;
File file = null;
try {
if (!isCanUseSD()) {
return null;
}
// 先判断SD卡中有没有这个文件，不比较后缀部分比较
String fileNameNoMIME = getCacheFileNameFromUrl(url);
File parentFile = new File(imageDownloadDir);
File[] files = parentFile.listFiles();
for (int i = 0; i < files.length; ++i) {
String fileName = files[i].getName();
String name = fileName.substring(0, fileName.lastIndexOf("."));
if (name.equals(fileNameNoMIME)) {
// 文件已存在
return files[i].getPath();
}
}
URL mUrl = new URL(url);
connection = (HttpURLConnection) mUrl.openConnection();
connection.connect();
// 获取文件名，下载文件
String fileName = getCacheFileNameFromUrl(url, connection);
file = new File(imageDownloadDir, fileName);
downFilePath = file.getPath();
if (!file.exists()) {
file.createNewFile();
} else {
// 文件已存在
return file.getPath();
}
in = connection.getInputStream();
fileOutputStream = new FileOutputStream(file);
byte[] b = new byte[1024];
int temp = 0;
while ((temp = in.read(b)) != -1) {
fileOutputStream.write(b, 0, temp);
}
} catch (Exception e) {
e.printStackTrace();
AbLogUtil.e(AbFileUtil.class, "有文件下载出错了,已删除");
// 检查文件大小,如果文件为0B说明网络不好没有下载成功，要将建立的空文件删除
if (file != null) {
file.delete();
}
file = null;
downFilePath = null;
} finally {
try {
if (in != null) {
in.close();
}
} catch (Exception e) {
e.printStackTrace();
}
try {
if (fileOutputStream != null) {
fileOutputStream.close();
}
} catch (Exception e) {
e.printStackTrace();
}
try {
if (connection != null) {
connection.disconnect();
}
} catch (Exception e) {
e.printStackTrace();
}
}
return downFilePath;
}