将图像从 Android 发送到 C# Web 服务
本文关键字:Web 服务 图像 Android | 更新日期: 2023-09-27 17:56:49
我正在将图像从Android发送到C#网络服务。我总是得到一个黑色的图像。谁能帮忙?
安卓方面:
public void save(View v) {
mBitmap = Bitmap.createBitmap(v.getWidth(), v.getHeight(), Bitmap.Config.RGB_565);
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
mBitmap.compress(Bitmap.CompressFormat.JPEG,40, outputStream);
byte[] imgByte = outputStream.toByteArray();
String base64Str = Base64.encodeToString(imgByte, Base64.DEFAULT);
// Send base64Str to server
}
C# 端:
[WebMethod]
public void GetImage(string base64ImageStr)
{
byte[] imageBytes = Convert.FromBase64String(base64ImageStr);
//Save imageBytes to DB
}
我从DB调用它:
public ActionResult Image(){
var bytes=GetBytesArrayFromDB(id);
return File(bytes, "image/jpeg");
}
在视图中:
<img src='@Url.Action("Image")' alt="" />
我想通了在将其发送到服务器之前,我没有对其进行画布处理。也用这个
画布画布 = 新画布(mBitmap);v.画(帆布);
public void save(View v) {
mBitmap = Bitmap.createBitmap(v.getWidth(), v.getHeight(), Bitmap.Config.RGB_565);
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
mBitmap.compress(Bitmap.CompressFormat.JPEG,40, outputStream);
byte[] imgByte = outputStream.toByteArray();
String base64Str = Base64.encodeToString(imgByte, Base64.DEFAULT);
Canvas canvas = new Canvas(mBitmap);
v.draw(canvas);
// Send base64Str to server
}
发送 base64Str 到服务器
import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.PropertyInfo;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;
public class CallSoap
{
public final String SOAP_ACTION = //url;
public final String OPERATION_NAME = "name of action";
public final String WSDL_TARGET_NAMESPACE = "asmx url";
public final String SOAP_ADDRESS = "soap address";
public CallSoap()
{
}
public String Call(String base64Str)
{
SoapObject request = new SoapObject(WSDL_TARGET_NAMESPACE,OPERATION_NAME);
PropertyInfo pi=new PropertyInfo();
pi.setName("base64Str");
pi.setValue(base64Str);
pi.setType(String.class);
request.addProperty(pi);
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.dotNet = true;
envelope.setOutputSoapObject(request);
HttpTransportSE httpTransport = new HttpTransportSE(SOAP_ADDRESS);
Object response=null;
try
{
httpTransport.call(SOAP_ACTION, envelope);
response = envelope.getResponse();
}
catch (Exception exception)
{
response=exception.toString();
}
return response.toString();
}
}