我已经修改了蓝牙聊天应用程序同时发送两个字符串（交易号和密码），问题是当我按下发送按钮时只发送一个字符串（密码），我不知道如何通过两个字符串同情.. This is my Application Model
主要活动
private EditText et_tnum;
private EditText et_pass;
private TextView status;
private Button btnConnect;
private ListView listView;
private Dialog dialog;
private TextInputLayout inputLayout;
private ArrayAdapter<String> chatAdapter;
private ArrayList<String> chatMessages;
private BluetoothAdapter bluetoothAdapter;
public static final int MESSAGE_STATE_CHANGE = 1;
public static final int MESSAGE_READ = 2;
public static final int MESSAGE_WRITE = 3;
public static final int MESSAGE_DEVICE_OBJECT = 4;
public static final int MESSAGE_TOAST = 5;
public static final String DEVICE_OBJECT = "device_name";
private static final int REQUEST_ENABLE_BLUETOOTH = 1;
private ChatController chatController;
private BluetoothDevice connectingDevice;
private ArrayAdapter<String> discoveredDevicesAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
findViewsByIds();
//check device support bluetooth or not
bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (bluetoothAdapter == null) {
Toast.makeText(this, "Bluetooth is not available!", Toast.LENGTH_SHORT).show();
finish();
}
//show bluetooth devices dialog when click connect button
btnConnect.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
showPrinterPickDialog();
}
});
//set chat adapter
chatMessages = new ArrayList<>();
chatAdapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, chatMessages);
listView.setAdapter(chatAdapter);
}
private Handler handler = new Handler(new Handler.Callback() {
@Override
public boolean handleMessage(Message msg) {
switch (msg.what) {
case MESSAGE_STATE_CHANGE:
switch (msg.arg1) {
case ChatController.STATE_CONNECTED:
setStatus("Connected to: " + connectingDevice.getName());
btnConnect.setEnabled(false);
break;
case ChatController.STATE_CONNECTING:
setStatus("Connecting...");
btnConnect.setEnabled(false);
break;
case ChatController.STATE_LISTEN:
case ChatController.STATE_NONE:
setStatus("Not connected");
break;
}
break;
case MESSAGE_WRITE:
byte[] writeBuf = (byte[]) msg.obj;
String writeMessage = new String(writeBuf);
chatMessages.add("Me: " + writeMessage);
chatAdapter.notifyDataSetChanged();
break;
case MESSAGE_READ:
byte[] readBuf = (byte[]) msg.obj;
String readMessage = new String(readBuf, 0, msg.arg1);
chatMessages.add(connectingDevice.getName() + ": " + readMessage);
chatAdapter.notifyDataSetChanged();
break;
case MESSAGE_DEVICE_OBJECT:
connectingDevice = msg.getData().getParcelable(DEVICE_OBJECT);
Toast.makeText(getApplicationContext(), "Connected to " + connectingDevice.getName(),
Toast.LENGTH_SHORT).show();
break;
case MESSAGE_TOAST:
Toast.makeText(getApplicationContext(), msg.getData().getString("toast"),
Toast.LENGTH_SHORT).show();
break;
}
return false;
}
});
private void showPrinterPickDialog() {
dialog = new Dialog(this);
dialog.setContentView(R.layout.layout_bluetooth);
dialog.setTitle("Bluetooth Devices");
if (bluetoothAdapter.isDiscovering()) {
bluetoothAdapter.cancelDiscovery();
}
bluetoothAdapter.startDiscovery();
//Initializing bluetooth adapters
ArrayAdapter<String> pairedDevicesAdapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1);
discoveredDevicesAdapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1);
//locate listviews and attatch the adapters
ListView listView = (ListView) dialog.findViewById(R.id.pairedDeviceList);
ListView listView2 = (ListView) dialog.findViewById(R.id.discoveredDeviceList);
listView.setAdapter(pairedDevicesAdapter);
listView2.setAdapter(discoveredDevicesAdapter);
// Register for broadcasts when a device is discovered
IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
registerReceiver(discoveryFinishReceiver, filter);
// Register for broadcasts when discovery has finished
filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
registerReceiver(discoveryFinishReceiver, filter);
bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
Set<BluetoothDevice> pairedDevices = bluetoothAdapter.getBondedDevices();
// If there are paired devices, add each one to the ArrayAdapter
if (pairedDevices.size() > 0) {
for (BluetoothDevice device : pairedDevices) {
pairedDevicesAdapter.add(device.getName() + "\n" + device.getAddress());
}
} else {
pairedDevicesAdapter.add(getString(R.string.none_paired));
}
//Handling listview item click event
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
bluetoothAdapter.cancelDiscovery();
String info = ((TextView) view).getText().toString();
String address = info.substring(info.length() - 17);
connectToDevice(address);
dialog.dismiss();
}
});
listView2.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
bluetoothAdapter.cancelDiscovery();
String info = ((TextView) view).getText().toString();
String address = info.substring(info.length() - 17);
connectToDevice(address);
dialog.dismiss();
}
});
dialog.findViewById(R.id.cancelButton).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
dialog.dismiss();
}
});
dialog.setCancelable(false);
dialog.show();
}
private void setStatus(String s) {
status.setText(s);
}
private void connectToDevice(String deviceAddress) {
bluetoothAdapter.cancelDiscovery();
BluetoothDevice device = bluetoothAdapter.getRemoteDevice(deviceAddress);
chatController.connect(device);
}
private void findViewsByIds() {
status = (TextView) findViewById(R.id.status);
btnConnect = (Button) findViewById(R.id.btn_connect);
listView = (ListView) findViewById(R.id.list);
et_tnum = (EditText) findViewById(R.id.et_tnum);
et_pass = (EditText) findViewById(R.id.et_pass);
View btnSend = (Button) findViewById(R.id.btn_send);
btnSend.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (et_tnum.getText().toString().equals("")) {
Toast.makeText(MainActivity.this, "Please input some texts", Toast.LENGTH_SHORT).show();
} else {
//TODO: here
sendMessage(et_tnum.getText().toString());
et_tnum.setText("");
}
}
});
btnSend.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (et_pass.getText().toString().equals("")) {
Toast.makeText(MainActivity.this, "Please input some texts", Toast.LENGTH_SHORT).show();
} else {
//TODO: here
sendMessage(et_pass.getText().toString());
et_pass.setText("");
}
}
});
}
public void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case REQUEST_ENABLE_BLUETOOTH:
if (resultCode == Activity.RESULT_OK) {
chatController = new ChatController(this, handler);
} else {
Toast.makeText(this, "Bluetooth still disabled, turn off application!", Toast.LENGTH_SHORT).show();
finish();
}
}
}
private void sendMessage(String message) {
if (chatController.getState() != ChatController.STATE_CONNECTED) {
Toast.makeText(this, "Connection was lost!", Toast.LENGTH_SHORT).show();
return;
}
if (message.length() > 0) {
byte[] send = message.getBytes();
chatController.write(send);
}
}
@Override
public void onStart() {
super.onStart();
if (!bluetoothAdapter.isEnabled()) {
Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableIntent, REQUEST_ENABLE_BLUETOOTH);
} else {
chatController = new ChatController(this, handler);
}
}
@Override
public void onResume() {
super.onResume();
if (chatController != null) {
if (chatController.getState() == ChatController.STATE_NONE) {
chatController.start();
}
}
}
@Override
public void onDestroy() {
super.onDestroy();
if (chatController != null)
chatController.stop();
}
private final BroadcastReceiver discoveryFinishReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (BluetoothDevice.ACTION_FOUND.equals(action)) {
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
if (device.getBondState() != BluetoothDevice.BOND_BONDED) {
discoveredDevicesAdapter.add(device.getName() + "\n" + device.getAddress());
}
} else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
if (discoveredDevicesAdapter.getCount() == 0) {
discoveredDevicesAdapter.add(getString(R.string.none_found));
}
}
}
};
}
Activity_layout.xml
<LinearLayout
android:layout_width="348dp"
android:layout_height="80dp"
android:orientation="vertical">
<TextView
android:id="@+id/status"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Not Connected" />
<Button
android:id="@+id/btn_connect"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:text="Connect" />
</LinearLayout>
<ListView
android:id="@+id/list"
android:layout_width="332dp"
android:layout_height="164dp" />
<EditText
android:id="@+id/et_tnum"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10"
android:hint="Transaction Number"
android:inputType="textEmailAddress|textPersonName" />
<EditText
android:id="@+id/et_pass"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10"
android:hint="Password"
android:inputType="textPassword" />
<Button
android:id="@+id/btn_send"
android:layout_width="213dp"
android:layout_height="wrap_content"
android:text="Send" />
答案 0 :(得分：1)
将您的密码和手机号码附加到一个字符串中，然后通过BT发送。