我正在使用以下代码从服务器下载图像
public Bitmap connectServerForImage(String url) {
HttpConnection httpConnection = null;
DataOutputStream httpDataOutput = null;
InputStream httpInput = null;
int rc;
Bitmap bitmp = null;
try {
httpConnection = (HttpConnection) Connector.open(url+ ConnectionType.getConnectionType());
rc = httpConnection.getResponseCode();
if (rc != HttpConnection.HTTP_OK) {
throw new IOException("HTTP response code: " + rc);
}
httpInput = httpConnection.openInputStream();
InputStream inp = httpInput;
byte[] b = IOUtilities.streamToBytes(inp);
EncodedImage hai = EncodedImage.createEncodedImage(b, 0, b.length);
return hai.getBitmap();
} catch (Exception ex) {
System.out.println("URL Bitmap Error........" + ex.getMessage());
} finally {
try {
if (httpInput != null)
httpInput.close();
if (httpDataOutput != null)
httpDataOutput.close();
if (httpConnection != null)
httpConnection.close();
} catch (Exception e) {
e.printStackTrace();
}
}
return bitmp;
}
和 ConnetionType 类如下
public class ConnectionType {
public static String getConnectionType()
{
String connectionString = null;
if (DeviceInfo.isSimulator())
{
connectionString = "";
return connectionString;
}
else if (WLANInfo.getWLANState() == WLANInfo.WLAN_STATE_CONNECTED)
{
connectionString = ";interface=wifi";
return connectionString;
}
else if ((CoverageInfo.getCoverageStatus() & CoverageInfo.COVERAGE_DIRECT) == CoverageInfo.COVERAGE_DIRECT)
{
String carrierUid = getCarrierBIBSUid();
if (carrierUid == null)
{
connectionString = ";deviceside=true";
return connectionString;
}
else
{
connectionString=carrierUid;
return connectionString;
}
}
else if ((CoverageInfo.getCoverageStatus() & CoverageInfo.COVERAGE_MDS) == CoverageInfo.COVERAGE_MDS)
{
connectionString = ";deviceside=false";
return connectionString;
}
else
{
connectionString = ";deviceside=true";
return connectionString;
]
}
/**
* Looks through the phone's service book for a carrier provided BIBS
* network
*
* @return The UID used to connect to that network.
*/
private static String getCarrierBIBSUid()
{
ServiceRecord[] records = ServiceBook.getSB().getRecords();
int currentRecord;
for (currentRecord = 0; currentRecord < records.length; currentRecord++)
{
if (records[currentRecord].getCid().toLowerCase().equals("ippp"))
{
if (records[currentRecord].getName().toLowerCase().indexOf("bibs") >= 0)
{
//otherwise, use the UID to construct a valid carrier BIB-S
String carrierUid= records[currentRecord].getUid();
String extension = ";deviceside=false;connectionUID=" + carrierUid + ";ConnectionType=mds-public";
return extension;
}
}
}
for (currentRecord = 0; currentRecord < records.length; currentRecord++)
{
if(records[currentRecord].getCid().toLowerCase().equals("wptcp"))
{
String carrierUid= records[currentRecord].getUid();
String extension = ";ConnectionUID="+carrierUid;
return extension;
}
}
return null;
}
}
图像在模拟器上显示正常，但是当我在我的设备上运行时没有图像显示。请建议我在哪里失踪。谢谢！！！