Como recuperar seqüências de caracteres base64 (imagem grande) do servidor para o android
Eu tenho que recuperar a imagem de todo o tamanho do servidor para android móvel com referência a id, de modo que eu tentei com este código abaixo e conseguiu com sucesso a base 64 string e imagem recuperada para baseo basestring equivalente funciona bem para imagens de tamanho pequeno, mas quando eu vou para imagens de tamanho grande, a tela preta não consegue obter imagens de tamanho grande na tela por meio desse método.
desde já, obrigado.
como recuperarseqüência de base64 de tamanho grande através do objeto de sabão de um servidorpackage com.imageload;
import java.io.IOException;
import java.util.StringTokenizer;
import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapPrimitive;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;
import org.xmlpull.v1.XmlPullParserException;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Typeface;
import android.os.Bundle;
import android.util.Base64;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
public class ImageloadActivity extends Activity {
/** Called when the activity is first created. */
private Button submit,clr,ext;
private ImageView imageView;
private TextView institute,orderno,name,mobno,handeled,regdat,delvdat,pname,pamt,dirby,regby,delby;
String val11,val12,val13,val14;
String str = null,str2 = null;
String error="0",IiD;
/* private static final String SOAP_ACTION = "http://tempuri.org/sta1";
private static final String METHOD_NAME = "sta1";
private static final String NAMESPACE = "http://tempuri.org/";
private static final String URL = "http://cyberstudents.in/newand//service.asmx";*/
private static final String SOAP_ACTION = "http://tempuri.org/IMAGE";
private static final String METHOD_NAME = "IMAGE";
private static final String NAMESPACE = "http://tempuri.org/";
//private static final String URL = "http://cyberstudents.in/crdroid//service.asmx";
private static final String URL = "http:///localdb/Service.asmx";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
this.orderno=(TextView)this.findViewById(R.id.ordernoeditText);
this.pname=(TextView)this.findViewById(R.id.insTextView);
this.submit=(Button)this.findViewById(R.id.getbutton);
this.clr=(Button)this.findViewById(R.id.clearbutton);
this.ext=(Button)this.findViewById(R.id.Exitbutton);
this.imageView =(ImageView) findViewById(R.id.imageView1);
orderno.setText("CB2-1112-CEA0883");
this.submit.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
IiD=orderno.getText().toString();
if(error.equals("0"))
{
SoapObject request = new SoapObject(NAMESPACE,METHOD_NAME);
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.dotNet=true;
request.addProperty("ID",IiD);
envelope.setOutputSoapObject(request);
HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
try
{
try
{
androidHttpTransport.call(SOAP_ACTION, envelope);
}
catch (XmlPullParserException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
SoapPrimitive result = (SoapPrimitive)envelope.getResponse();
//to get the data should be a base
String resultData = result.toString();
//pname.setText(resultData);
byte[] decodedString = Base64.decode(resultData, Base64.DEFAULT);
Bitmap decodedByte = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length);
imageView.setImageBitmap(decodedByte);
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
});
this.clr.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
pname.setText("");
}
});
this.ext.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
System.exit(0);
}
});
}
}
[WebMethod]
public string IMAGE(string ID)
{
SqlConnection conn = new SqlConnection("Data Source=;Initial Catalog=;Persist Security Info=True;User ID=sa;");
conn.Open();
SqlDataAdapter sdImageSource = new SqlDataAdapter();
sdImageSource.SelectCommand = new SqlCommand("select ImageData from ImagesStore where ImageId=('" + ID + "')", conn);
DataSet dsImage = new DataSet();
sdImageSource.Fill(dsImage);
byte[] blob = (byte[])dsImage.Tables[0].Rows[0][0];
int k = blob.Length;
string c = Convert.ToBase64String(blob);
return c;
}