我正在开发一个基于 NFC 的应用程序，我们在其中从 NFC 设备获取数据。但它的工作原理是，当我们将启用 NFC 的 Android 设备与 NFC 设备相邻时，会出现一个对话框，其中列出了所有基于 NFC 的应用程序，所以其中一个也是我的。当我们从列表中单击我们的应用程序图标时，它会从我的应用程序（命名为 NfcActivity）中打开一个 Activity 并开始将数据传输到我不想要的 Android 手机。在那个活动中有两个按钮也更新和取消。我希望当我们单击更新按钮时，NFC 设备开始使用进度条将数据传输到手机，如果数据将完全传输，则进度条会自动关闭。我不能这样做，如果您对此有任何建议，请建议我。
提前致谢。
Nfc活动：
package com.a1technology.impak;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.math.BigInteger;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.PendingIntent;
import android.content.ComponentName;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.ServiceConnection;
import android.nfc.NfcAdapter;
import android.nfc.tech.IsoDep;
import android.os.Bundle;
import android.os.IBinder;
import android.util.Log;
import android.view.View;
import android.widget.Toast;
import com.a1technology.impak.db.DBAdapter;
import com.cypak.mobile.bridge.android.CypakDevice;
import com.cypak.mobile.bridge.android.CypakDeviceListener;
import com.cypak.mobile.bridge.android.NfcTransportService;
import com.cypak.mobile.bridge.android.TransportBinder;
public class NfcActivity extends Activity implements CypakDeviceListener {
private boolean update = false;
private String TAG = "NfcExampleActivity";
List<EventByteGetSet> eventList = new ArrayList<EventByteGetSet>();
// Required for foreground dispatch
private String[][] techListsArray = new String[][] { new String[] { IsoDep.class.getName() } };
private NfcAdapter mAdapter;
private PendingIntent pendingIntent;
// Required when binding to NfcTransportService
private NfcTransportService mService;
private boolean bound = false;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.nfc_activity);
findViewById(R.id.cancel_button).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
finish();
}
});
findViewById(R.id.update_button).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
update = true;
}
});
// Required for foreground dispatch
pendingIntent = PendingIntent.getActivity(getApplicationContext(), 0, new Intent(getApplicationContext(), NfcActivity.class).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);
mAdapter = NfcAdapter.getDefaultAdapter(getApplicationContext());// Connecting
// to
// the
// adapter
resolveIntent(getIntent());
Intent intent = new Intent(this, NfcTransportService.class);
// Bind to the service
if (!bindService(intent, mConnection, Context.BIND_AUTO_CREATE)) {
Log.e(TAG, "Failed to bind service");
}
}
@Override
protected void onPause() {
super.onPause();
// finish();
// Required for foreground dispatch
mAdapter.disableForegroundDispatch(this);
}
@Override
protected void onDestroy() {
super.onDestroy();
if (bound) {
unbindService(mConnection);
bound = false;
}
}
@Override
protected void onResume() {
super.onResume();
// Required for foreground dispatch
mAdapter.enableForegroundDispatch(this, pendingIntent, null, techListsArray);
}
@Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
setIntent(intent);
resolveIntent(intent);
}
private void resolveIntent(Intent intent) {
if (NfcAdapter.ACTION_TECH_DISCOVERED.equals(intent.getAction())// need
// to
// find
// what
// action
// is
// coming
&& mService != null) {
// Let NfcTransportService handle the Nfc Intent
try {
mService.handleIntent(intent);
}
catch (IOException e) {
Log.w(TAG, "Failed to detect device", e);
}
}
}
/**
* Defines callbacks for service binding, passed to bindService(). Only
* needed if binding to MyMaxTransportService
* */
private ServiceConnection mConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName className, IBinder service) {
// We've bound to NfcTransportService, cast the IBinder and
// get NfcTransportService instance
Log.v(TAG, "Service connected");
TransportBinder binder = (TransportBinder) service;
mService = (NfcTransportService) binder.getService();
bound = true;
mService.registerDeviceListener(NfcActivity.this);
}
@Override
public void onServiceDisconnected(ComponentName name) {
Log.v(TAG, "Service disconnected");
bound = false;
}
};
@Override
public void deviceDiscovered(CypakDevice device) {
// String hex = "1";
// byte[] byteClear= hex.getBytes();
//
if (!update) {
return;
}
else
try {
// byte[] byteData= device.sendAppCommand((byte)
// 0x11, byteClear);
NFCDataHandler mNfcDataHandler = new NFCDataHandler(this);
byte[] byteStatusData = device.sendAppCommand((byte) 0x00, new byte[0]);
String stateHCC = mNfcDataHandler.getStatus(byteStatusData);
if (stateHCC.equalsIgnoreCase("04")) {
byte[] byteQueLogData = device.sendAppCommand((byte) 0x05, new byte[0]);
if (byteQueLogData.length < 6) {
ShowMessage("Warning", "Card is Empty");
return;
}
mNfcDataHandler.getQueLog(byteQueLogData);
}
else {
ShowMessage("Warning", "Card is not Active");
return;
}
Log.v("Value", "");
}
catch (com.cypak.mobile.bridge.android.AppCommandErrorCodeException e) {
Log.e(TAG, "AppCommandErrorCodeException, error code " + e.getErrorCode(), e);
}
catch (com.cypak.mobile.bridge.android.AppCommandException e) {
Log.e(TAG, "AppCommandException", e);
}
catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// Toast.makeText(getApplicationContext(), "Device found! " +
// device, Toast.LENGTH_LONG).show();
}
@Override
public void invalidDeviceDiscovered(CypakDevice device) {
Toast.makeText(getApplicationContext(), "Invalid device!", Toast.LENGTH_SHORT).show();
}
@Override
public void deviceLost() {
Toast.makeText(getApplicationContext(), "Device lost!", Toast.LENGTH_SHORT).show();
}
protected Date dateFromlongBuffer(long bb) {
return new Date((long) 1000 * (long) bb);
}
protected Date dateFromByteBuffer(ByteBuffer bb) {
return new Date((long) 1000 * (long) bb.getInt());
}
static final byte[] HEX_CHAR_TABLE = { (byte) '0', (byte) '1', (byte) '2', (byte) '3', (byte) '4', (byte) '5', (byte) '6', (byte) '7', (byte) '8', (byte) '9', (byte) 'a', (byte) 'b',
(byte) 'c', (byte) 'd', (byte) 'e', (byte) 'f' };
public static String getHexString(byte[] raw) throws UnsupportedEncodingException {
byte[] hex = new byte[2 * raw.length];
int index = 0;
for (byte b : raw) {
int v = b & 0xFF;
hex[index++] = HEX_CHAR_TABLE[v >>> 4];
hex[index++] = HEX_CHAR_TABLE[v & 0xF];
}
return new String(hex, "ASCII");
}
public static int hex2decimal(String s) {
String digits = "0123456789ABCDEF";
s = s.toUpperCase();
int val = 0;
for (int i = 0; i < s.length(); i++) {
char c = s.charAt(i);
int d = digits.indexOf(c);
val = 16 * val + d;
}
return val;
}
private void ShowMessage(String title, String message) {
AlertDialog.Builder b = new AlertDialog.Builder(this);
AlertDialog a = b.create();
a.setTitle(title);
a.setMessage(message);
a.setButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface arg0, int arg1) {
finish();
}
});
a.show();
}
}