我有一个Android应用,正在尝试通过API接口将照片上传到网络服务器。只要图像尺寸不是太大(在1280x800左右失败),该方法就可以正常工作。这里可以使用的代码将缩小图像,但对于较大的图像将失败。有什么建议么?
public void uploadPhoto(FileInputStream fileInputStream, String session_key) throws IOException, ClientProtocolException {
URL connectURL = new URL(API_ENDPOINT_URL + "session_key="
+ session_key + "&method=" + ApiMethods.UPLOAD_PHOTO);
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
HttpURLConnection conn = (HttpURLConnection) connectURL.openConnection();
// Allow Inputs
conn.setDoInput(true);
// Allow Outputs
conn.setDoOutput(true);
// Don't use a cached copy.
conn.setUseCaches(false);
// Use a post method.
conn.setRequestMethod("POST");
conn.setRequestProperty("Connection", "Keep-Alive");
conn.setRequestProperty("Content-Type", "multipart/form-data;boundary="+ boundary);
DataOutputStream dos = new DataOutputStream(conn.getOutputStream());
dos.writeBytes(twoHyphens + boundary + lineEnd);
// Log.d(TAG, " dos1: " + dos);
dos.writeBytes("Content-Disposition: form-data; name=\"uploadedfile\";filename=\""+ "file.png" + "\"" + lineEnd);
// Log.d(TAG, " dos2: " + dos);
dos.writeBytes(lineEnd);
// Log.d(TAG, " dos3: " + dos);
// create a buffer of maximum size
int bytesAvailable = fileInputStream.available();
int maxBufferSize = 1024;
int bufferSize = Math.min(bytesAvailable, maxBufferSize);
byte[] buffer = new byte[bufferSize];
// read file and write it into form...
int bytesRead = fileInputStream.read(buffer, 0, bufferSize);
Log.d(TAG, " BytesREad:" + bytesRead);
while (bytesRead > 0) {
Log.d(TAG, " BytesREad in while:" + bytesRead);
dos.write(buffer, 0, bufferSize);
// Log.d(TAG, " dos3: " + dos);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
/*
* dos.writeBytes(lineEnd); dos.writeBytes(twoHyphens + boundary +
* twoHyphens + lineEnd);
*/
}
// send multipart form data necesssary after file data...
// dos.write(data);
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
// Log.d(TAG, " dos4 tostring: " + dos.toString());
// close streams
// Log.e(Tag,"File is written");
// fileInputStream.close();
dos.flush();
// Log.d(TAG, " dos5: " + dos.toString());
InputStream is = conn.getInputStream();
// retrieve the response from server
int ch;
StringBuffer b = new StringBuffer();
while ((ch = is.read()) != -1) {
b.append((char) ch);
// Log.d(TAG, " b: " + b.toString());
}
String s = b.toString();
Log.i("Response", s);
// Log.d(TAG, " response:" + s);
dos.close();
}
错误包括
10-20 04:16:26.658:错误/ dalvikvm-heap(20213):8957952字节的外部分配对于此进程而言太大。
10-20 04:16:26.658:错误/ dalvikvm(20213):内存不足:堆大小= 4551KB,已分配= 3039KB,位图大小= 9496KB
10-20 04:16:26.658:错误/(20213):VM不允许我们分配8957952字节
最佳答案
之前我遇到过非常类似的问题,原来不是上传图片,而是因为我试图在活动上显示图片。