0
在Gingerbread 2.3上，我的应用程序可以运行并可以连接到服务器。我无法连接到ICS 4.0.4上的服务器？
但是在ICS 4.0.4上，可以运行但不能连接到服务器。我可以在ICS上的浏览器上连接到服务器。
原因是什么以及如何解决。
public class NFC_readerActivity extends Activity {
private NfcAdapter mAdapter;
private PendingIntent mPendingIntent;
private NdefMessage mNdefPushMessage;
private AlertDialog mDialog;
// New methods in Android 2.3.3
private static Method sAdapter_enableForegroundDispatch;
private static Method sAdapter_enableForegroundNdefPush;
private static Method sAdapter_disableForegroundDispatch;
private static Method sAdapter_disableForegroundNdefPush;
final static String url = "http://10.204.3.112/getpos.php";
static String result = "0";
String a = "";
static {
try {
sAdapter_enableForegroundDispatch = NfcAdapter.class.getMethod(
"enableForegroundDispatch", new Class[] { Activity.class,
PendingIntent.class, IntentFilter[].class,
String[][].class });
sAdapter_enableForegroundNdefPush = NfcAdapter.class.getMethod(
"enableForegroundNdefPush", new Class[] { Activity.class,
NdefMessage.class });
sAdapter_disableForegroundDispatch = NfcAdapter.class
.getMethod("disableForegroundDispatch",
new Class[] { Activity.class });
sAdapter_disableForegroundNdefPush = NfcAdapter.class
.getMethod("disableForegroundNdefPush",
new Class[] { Activity.class });
} catch (NoSuchMethodException e) {
// failure, i.e Android 2.3-2.3.2
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
boolean checkConnect = isConnectedToServer(url, 30000);
if(checkConnect){
Toast.makeText(getApplicationContext(), "connected",
Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(getApplicationContext(), "not connect",
Toast.LENGTH_SHORT).show();
}
resolveIntent(getIntent());
mDialog = new AlertDialog.Builder(this).setNeutralButton("Ok", null)
.create();
mAdapter = NfcAdapter.getDefaultAdapter(this);
if (mAdapter == null) {
showMessage(R.string.error, R.string.no_nfc);
}
mPendingIntent = PendingIntent.getActivity(this, 0, new Intent(this,
getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);
mNdefPushMessage = new NdefMessage(new NdefRecord[] { newTextRecord(
"Message from NFC Reader :-)", Locale.ENGLISH, true) });
}
private void showMessage(int title, int message) {
mDialog.setTitle(title);
mDialog.setMessage(getText(message));
mDialog.show();
}
private NdefRecord newTextRecord(String text, Locale locale,
boolean encodeInUtf8) {
byte[] langBytes = locale.getLanguage().getBytes(
Charset.forName("US-ASCII"));
Charset utfEncoding = encodeInUtf8 ? Charset.forName("UTF-8") : Charset
.forName("UTF-16");
byte[] textBytes = text.getBytes(utfEncoding);
int utfBit = encodeInUtf8 ? 0 : (1 << 7);
char status = (char) (utfBit + langBytes.length);
byte[] data = new byte[1 + langBytes.length + textBytes.length];
data[0] = (byte) status;
System.arraycopy(langBytes, 0, data, 1, langBytes.length);
System.arraycopy(textBytes, 0, data, 1 + langBytes.length,
textBytes.length);
return new NdefRecord(NdefRecord.TNF_WELL_KNOWN, NdefRecord.RTD_TEXT,
new byte[0], data);
}
@Override
protected void onResume() {
super.onResume();
if (mAdapter != null) {
if (!mAdapter.isEnabled()) {
showMessage(R.string.error, R.string.nfc_disabled);
}
try {
sAdapter_enableForegroundDispatch.invoke(mAdapter, this,
mPendingIntent, null, null);
sAdapter_enableForegroundNdefPush.invoke(mAdapter, this,
mNdefPushMessage);
} catch (Exception e) {
e.printStackTrace();
}
}
}
@Override
protected void onPause() {
super.onPause();
if (mAdapter != null) {
try {
sAdapter_disableForegroundDispatch.invoke(mAdapter, this);
sAdapter_disableForegroundNdefPush.invoke(mAdapter, this);
} catch (Exception e) {
// ignore
}
}
}
private void resolveIntent(Intent intent) {
String action = intent.getAction();
if (NfcAdapter.ACTION_TAG_DISCOVERED.equals(action)
|| NfcAdapter.ACTION_NDEF_DISCOVERED.equals(action)) {
Parcelable[] rawMsgs = intent
.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES);
NdefMessage[] msgs;
msgs = new NdefMessage[rawMsgs.length];
for (int i = 0; i < rawMsgs.length; i++) {
msgs[i] = (NdefMessage) rawMsgs[i];
}
getCode(msgs);
}
}
public boolean isConnectedToServer(String url, int timeout) {
try {
URL myUrl = new URL(url);
URLConnection connection = myUrl.openConnection();
connection.setConnectTimeout(timeout);
connection.connect();
return true;
} catch (Exception e) {
return false;
}
}
private static void getCodeServer(final String key) {
Thread thread = new Thread() {
public void run() {
Looper.prepare();
DefaultHttpClient client = new DefaultHttpClient();
HttpParams params = client.getParams();
HttpConnectionParams.setConnectionTimeout(params, 10000);
HttpConnectionParams.setSoTimeout(params, 10000);
HttpClientParams.setRedirecting(params, false);
HttpPost post = new HttpPost(url);
List<NameValuePair> valuePairs = new ArrayList<NameValuePair>(1);
valuePairs.add(new BasicNameValuePair("code", key));
try {
post.setEntity(new UrlEncodedFormEntity(valuePairs));
} catch (UnsupportedEncodingException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (Exception e) {
Log.e("log_tag", "Error in http connection" + e.toString());
}
HttpResponse response = null;
try {
response = client.execute(post);
ByteArrayOutputStream output = new ByteArrayOutputStream();
response.getEntity().writeTo(output);
result = output.toString();
client.getConnectionManager().shutdown();
} catch (ClientProtocolException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
Looper.loop();
}
};
thread.start();
try {
Thread.sleep(3000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
void getCode(NdefMessage[] msgs) {
if (msgs == null || msgs.length == 0) {
return;
}
List<ParsedNdefRecord> records = MsgParser.parse(msgs[0]);
Toast.makeText(getApplicationContext(), TextRecord.tRecord,
Toast.LENGTH_SHORT).show();
if (isConnectedToServer(url, 10000000)) {
Toast.makeText(getApplicationContext(), "Connected.",
Toast.LENGTH_SHORT).show();
getCodeServer(TextRecord.tRecord);
if (result.equals("1")) {
Toast.makeText(getApplicationContext(), "You are teacher.",
Toast.LENGTH_SHORT).show();
} else if (result.equals("2")) {
Toast.makeText(getApplicationContext(), "You are staff.",
Toast.LENGTH_SHORT).show();
} else if (result.equals("3")) {
Toast.makeText(getApplicationContext(), "You are student.",
Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(getApplicationContext(), "Somtring wrong.",
Toast.LENGTH_SHORT).show();
}
} else {
Toast.makeText(getApplicationContext(), "not Connect.",
Toast.LENGTH_SHORT).show();
}
}
@Override
public void onNewIntent(Intent intent) {
setIntent(intent);
resolveIntent(intent);
}
}
logcat的有一个橙色线和其他线路是绿色和蓝色
W/InputManagerService（132）：对非重点客户com.android.internal.view.IInputMethodClient $开始输入存根$ Proxy @ 417ef6e）（uid = 10026 pid = 1160）
请帮助我，这是我的高级项目。我明天将出席。
你的问题太泛泛，不能给出任何有用的答案。请细化并可能显示一些代码。 –
请提供一些细节，什么样的错误/例外，它显示或粘贴logcat在这里。 –
您是否收到任何错误。提供更多信息 – sachy