[英]URL - FileNotFoundException for image file in Android
我正在嘗試從特定URL獲取圖像,但它會拋出FileNotFoundException
。 如果我嘗試從瀏覽器打開網址,我可以看到圖片。 請幫忙。 以下是我的代碼。 謝謝。
String fileURL = "http://sposter.smartag.my/images/KFC_Voucher.jpg";
String FILENAME = "caldophilus.jpg";
URL u = new URL(fileURL);
HttpURLConnection c = (HttpURLConnection) u.openConnection();
c.setRequestMethod("GET");
c.setDoOutput(true);
c.connect();
File root = Environment.getExternalStorageDirectory();
FileOutputStream f = new FileOutputStream(new File(root, FILENAME));
InputStream x=c.getInputStream();
int size=x.available();
byte b[]= new byte[size];
x.read(b);
f.write(b);
f.flush();
f.close();
試試這個:
BufferedInputStream inputStream = null;
OutputStream out = null;
String fileName = null;
String path = null;
File savedFile = null;
try
{
// Replace your URL here.
URL fileURL = new URL("http://enter.your.url.here");
URLConnection connection = fileURL.openConnection();
connection.connect();
inputStream = new java.io.BufferedInputStream(connection.getInputStream());
// Replace your save path here.
File fileDir = new File("path/to/save");
fileDir.mkdirs();
savedFile = new File("path/to/save", fileName);
out = new FileOutputStream(savedFile);
byte buf[] = new byte[1024];
int len;
long total = 0;
while ((len = inputStream.read(buf)) != -1)
{
total += len;
out.write(buf, 0, len);
}
out.close();
inputStream.close();
}
catch (Exception)
{
}
我試試這個,它的工作正常。 謝謝。
URL url = new URL(fileURL);
URLConnection conexion = url.openConnection();
conexion.connect();
int lenghtOfFile = conexion.getContentLength();
Log.d("ANDRO_ASYNC", "Lenght of file: " + lenghtOfFile);
InputStream input = new BufferedInputStream(url.openStream());
OutputStream output = new FileOutputStream("/sdcard/caldophilus.jpg");
byte data[] = new byte[1024];
long total = 0;
while ((count = input.read(data)) != -1) {
total += count;
output.write(data, 0, count);
}
output.flush();
output.close();
input.close();
請嘗試以下代碼。 它應該工作!
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
public class DownloadManager {
public static void downLoadImage(String imageURL, String destinationFileName) throws IOException {
URL url = new URL(imageURL);
InputStream inputStream = url.openStream();
OutputStream outputStream = new FileOutputStream(destinationFileName);
byte[] byteData = new byte[2048];
int length;
while((length=inputStream.read(byteData))!=-1) {
outputStream.write(byteData, 0, length);
}
inputStream.close();
outputStream.close();
}
public static void main(String[] args) throws IOException {
String imageURL = "http://sposter.smartag.my/images/KFC_Voucher.jpg";
String destinationFileName = "C:/Users/sarath_sivan/Desktop/caldophilus.jpg";
downLoadImage(imageURL, destinationFileName);
}
}
馬上嘗試一下 -
try {
url = paths[0];
HttpURLConnection connection = (HttpURLConnection) url
.openConnection();
int length = connection.getContentLength();
InputStream is = (InputStream) url.getContent();
byte[] imageData = new byte[length];
int buffersize = (int) Math.ceil(length / (double) 100);
int downloaded = 0;
int read;
while (downloaded < length) {
if (length < buffersize) {
read = is.read(imageData, downloaded, length);
} else if ((length - downloaded) <= buffersize) {
read = is.read(imageData, downloaded, length
- downloaded);
} else {
read = is.read(imageData, downloaded, buffersize);
}
downloaded += read;
publishProgress((downloaded * 100) / length);
}
Bitmap bitmap = BitmapFactory.decodeByteArray(imageData, 0,
length);
if (bitmap != null) {
Log.i(TAG, "Bitmap created");
} else {
Log.i(TAG, "Bitmap not created");
}
is.close();
return bitmap;
} catch (MalformedURLException e) {
Log.e(TAG, "Malformed exception: " + e.toString());
} catch (IOException e) {
Log.e(TAG, "IOException: " + e.toString());
} catch (Exception e) {
Log.e(TAG, "Exception: " + e.toString());
}
而且,請看一下這里
在......
FileOutputStream f = new FileOutputStream(new File(root, FILENAME));
嘗試用fileURL替換FILENAME。 另外,拋出的是哪一行? 那會有所幫助。
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