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我應該如何可以顯示每個文件我的Android使用的上傳按鈕上傳進度條，這樣的事情： 
如何顯示分別對多個上傳上傳進度 - Android電子
我曾嘗試這樣做使用服務和通知，但我想展示在UI本身的進展。
任何代碼示例將有所幫助。
我使用下面的班多上傳：
public class MultipartUtility
{
FileUploadListener listener;
private static final int BUFFER_SIZE = 1024;
private static final int TIME_OUT = 3 * 60 * 1000;
private final String boundary;
private static final String LINE_FEED = "\r\n";
private HttpURLConnection httpConn;
private String charset;
private OutputStream outputStream;
private PrintWriter writer;
public int statusCode;
public String mURL;
public interface FileUploadListener {
void onUpdateProgress(int percentage, long kb);
boolean isCanceled();
}
/**
* This constructor initializes a new HTTP POST request with content type
* is set to multipart/form-data
*
* @param requestURL
* @param charset
* @throws IOException
*/
public MultipartUtility(Context context, String requestURL, String charset, FileUploadListener listener)
throws IOException {
this.charset = charset;
this.listener = listener;
mURL = requestURL;
// creates a unique boundary based on time stamp
boundary = "" + System.currentTimeMillis() + "";
URL url = new URL(requestURL);
httpConn = null;
if (url.getProtocol().toLowerCase().equals("https")) {
trustAllHosts();
HttpsURLConnection https = (HttpsURLConnection) url.openConnection();
https.setHostnameVerifier(new HostnameVerifier() {
@Override
public boolean verify(String hostname, SSLSession session) {
return true;
}
});
httpConn = https;
} else {
httpConn = (HttpURLConnection) url.openConnection();
}
// httpConn.setConnectTimeout(TIME_OUT);
//httpConn.setReadTimeout(TIME_OUT);
httpConn.setUseCaches(false);
httpConn.setDoOutput(true); // indicates POST method
httpConn.setDoInput(true);
httpConn.setChunkedStreamingMode(BUFFER_SIZE);
httpConn.setRequestMethod("POST");
Storage storage = new Storage(context);
httpConn.setRequestProperty("x-auth", storage.readString("user_token"));
httpConn.setRequestProperty("Content-Type",
"multipart/form-data; boundary=" + boundary);
httpConn.setRequestProperty("Connection", "Keep-Alive");
outputStream = httpConn.getOutputStream();
writer = new PrintWriter(new OutputStreamWriter(outputStream, charset),
true);
}
private static void trustAllHosts() {
// Create a trust manager that does not validate certificate chains
TrustManager[] trustAllCerts = new TrustManager[]{new X509TrustManager() {
public java.security.cert.X509Certificate[] getAcceptedIssuers() {
return new java.security.cert.X509Certificate[]{};
}
public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
}
public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
}
}};
// Install the all-trusting trust manager
try {
SSLContext sc = SSLContext.getInstance("TLS");
sc.init(null, trustAllCerts, new java.security.SecureRandom());
HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* Adds a form field to the request
*
* @param name field name
* @param value field value
*/
public void addFormField(String name, String value) {
writer.append("--" + boundary).append(LINE_FEED);
writer.append("Content-Disposition: form-data; name=\"" + name + "\"")
.append(LINE_FEED);
writer.append("Content-Type: text/plain; charset=" + charset).append(
LINE_FEED);
writer.append(LINE_FEED);
writer.append(value).append(LINE_FEED);
writer.flush();
}
/**
* Adds a upload file section to the request
*
* @param fieldName name attribute in <input type="file" name="..." />
* @param uploadFile a File to be uploaded
* @throws IOException
*/
private long lastProgressUpdateTime = 0;
public void addFilePart(String fieldName, File uploadFile)
throws IOException {
String fileName = uploadFile.getName();
writer.append("--" + boundary).append(LINE_FEED);
writer.append(
"Content-Disposition: form-data; name=\"" + fieldName
+ "\"; filename=\"" + fileName + "\"")
.append(LINE_FEED);
writer.append(
"Content-Type: "
+ URLConnection.guessContentTypeFromName(fileName))
.append(LINE_FEED);
writer.append("charset=" + charset).append(
LINE_FEED);
writer.append(LINE_FEED);
writer.flush();
outputStream.flush();
byte[] buffer = new byte[BUFFER_SIZE];
try {
final FileInputStream inputStream = new FileInputStream(uploadFile);
long totalRead = 0;
long totalSize = uploadFile.length();
int read;
while ((read = inputStream.read(buffer)) > 0) {
totalRead += read;
int percentage = (int) ((totalRead/(float) totalSize) * 100);
outputStream.write(buffer, 0, read);
long now = System.currentTimeMillis();
if (lastProgressUpdateTime == 0 || lastProgressUpdateTime < now - 100) {
lastProgressUpdateTime = now;
Log.e("", totalRead + " " + " " + percentage);
if (listener != null)
this.listener.onUpdateProgress(percentage, totalRead);
}
}
} catch (Exception e) {
e.printStackTrace();
} finally {
outputStream.flush();
}
writer.append(LINE_FEED);
writer.flush();
}
/**
* Adds a header field to the request.
*
* @param name - name of the header field
* @param value - value of the header field
*/
public void addHeaderField(String name, String value) {
writer.append(name + ": " + value).append(LINE_FEED);
writer.flush();
}
/**
* Completes the request and receives response from the server.
*
* @return a list of Strings as response in case the server returned
* status OK, otherwise an exception is thrown.
* @throws IOException
*/
public String Execute() throws IOException {
String responses = "";
writer.append(LINE_FEED).flush();
writer.append("--" + boundary + "--").append(LINE_FEED);
writer.close();
StringBuilder sb = new StringBuilder();
try {
// checks server's status code first
statusCode = httpConn.getResponseCode();
//responses = ;
sb.append("" + Helpers.convertStreamToString(httpConn.getInputStream()) + "\n");
if (statusCode == HttpURLConnection.HTTP_OK) {
httpConn.disconnect();
}
responses = sb.toString();
return responses;
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
sb = new StringBuilder();
sb.append("" + Helpers.convertStreamToString(httpConn.getErrorStream()) + "\n");
responses = sb.toString();
}
return responses;
}
}
感謝您的快速回復。你能否提供一些代碼示例或者可能將我指向GIT存儲庫？ –
現在檢查我的更新答案。 –
我會運行該代碼段，如果它能正常工作，肯定會批准並註冊。 –