我想通过微型USB端口通过Android应用程序向Arduino发送指令。 例如，点击应用程序中的按钮时，应该发光连接到Arduino的连接器，连接应该通过Android手机上的微型USB端口完成。我使用蓝牙连接做了同样的事情。我该怎么办呢？或者代码中的变化应该是什么？
通过蓝牙：
package com.example.bluetooth;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.Method;
import java.lang.reflect.InvocationTargetException;
import java.util.UUID;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends Activity {
int red_count=0;
int yellow_count=0;
int green_count=0;
int white_count=0;
private static final String TAG = "bluetooth2";
Button red_button,yellow_button,green_button,white_button,reset_button;
Handler h;
final int RECIEVE_MESSAGE = 1; // Status for Handler
private BluetoothAdapter btAdapter = null;
private BluetoothSocket btSocket = null;
private StringBuilder sb = new StringBuilder();
private ConnectedThread mConnectedThread;
// SPP UUID service
private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
// MAC-address of Bluetooth module (you must edit this line)
private static String address = "20:13:01:18:05:08";
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
red_button = (Button) findViewById(R.id.red_button);
yellow_button = (Button) findViewById(R.id.yellow_button);
green_button = (Button) findViewById(R.id.green_button);
white_button = (Button) findViewById(R.id.white_button);
reset_button = (Button) findViewById(R.id.reset_button);
h = new Handler() {
public void handleMessage(android.os.Message msg) {
switch (msg.what) {
case RECIEVE_MESSAGE: // if receive massage
byte[] readBuf = (byte[]) msg.obj;
String strIncom = new String(readBuf, 0, msg.arg1); // create string from bytes array
sb.append(strIncom); // append string
int endOfLineIndex = sb.indexOf("\r\n"); // determine the end-of-line
if (endOfLineIndex > 0) { // if end-of-line,
sb.delete(0, sb.length()); // and clear
red_button.setEnabled(true);
yellow_button.setEnabled(true);
green_button.setEnabled(true);
white_button.setEnabled(true);
}
//Log.d(TAG, "...String:"+ sb.toString() + "Byte:" + msg.arg1 + "...");
break;
}
};
};
btAdapter = BluetoothAdapter.getDefaultAdapter(); // get Bluetooth adapter
checkBTState();
red_button.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
red_count++;
yellow_count=0;
green_count=0;
white_count=0;
red_button.setText(""+red_count);
yellow_button.setText("");
green_button.setText("");
white_button.setText("");
mConnectedThread.write("1"); // Send "1" via Bluetooth
}
});
yellow_button.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
yellow_count++;
red_count=0;
green_count=0;
white_count=0;
yellow_button.setText(""+yellow_count);
red_button.setText("");
green_button.setText("");
white_button.setText("");
mConnectedThread.write("2"); // Send "2" via Bluetooth
}
});
green_button.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
green_count++;
red_count=0;
yellow_count=0;
white_count=0;
green_button.setText(""+green_count);
red_button.setText("");
yellow_button.setText("");
white_button.setText("");
mConnectedThread.write("3"); // Send "3" via Bluetooth
}
});
white_button.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
white_count++;
red_count=0;
green_count=0;
yellow_count=0;
white_button.setText(""+white_count);
red_button.setText("");
green_button.setText("");
yellow_button.setText("");
mConnectedThread.write("4"); // Send "4" via Bluetooth
}
});
reset_button.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
white_count=0;
red_count=0;
green_count=0;
yellow_count=0;
white_button.setText("");
red_button.setText("");
green_button.setText("");
yellow_button.setText("");
mConnectedThread.write("0"); // Send "0" via Bluetooth
}
});
}
private BluetoothSocket createBluetoothSocket(BluetoothDevice device) throws IOException {
if(Build.VERSION.SDK_INT >= 10){
try {
final Method m = device.getClass().getMethod("createInsecureRfcommSocketToServiceRecord", new Class[] { UUID.class });
return (BluetoothSocket) m.invoke(device, MY_UUID);
} catch (SecurityException e) {
Log.e(TAG, "Could not create Insecure RFComm Connection",e);
} catch (NoSuchMethodException e) {
Log.e(TAG, "Could not create Insecure RFComm Connection",e);
} catch (IllegalArgumentException e) {
Log.e(TAG, "Could not create Insecure RFComm Connection",e);
} catch (IllegalAccessException e) {
Log.e(TAG, "Could not create Insecure RFComm Connection",e);
} catch (InvocationTargetException e) {
Log.e(TAG, "Could not create Insecure RFComm Connection",e);
}
}
return device.createRfcommSocketToServiceRecord(MY_UUID);
}
@Override
public void onResume() {
super.onResume();
Log.d(TAG, "...onResume - try connect...");
// Set up a pointer to the remote node using it's address.
BluetoothDevice device = btAdapter.getRemoteDevice(address);
// Two things are needed to make a connection:
// A MAC address, which we got above.
// A Service ID or UUID. In this case we are using the
// UUID for SPP.
try {
btSocket = createBluetoothSocket(device);
} catch (IOException e) {
errorExit("Fatal Error", "In onResume() and socket create failed: " + e.getMessage() + ".");
}
/*try {
btSocket = device.createRfcommSocketToServiceRecord(MY_UUID);
} catch (IOException e) {
errorExit("Fatal Error", "In onResume() and socket create failed: " + e.getMessage() + ".");
}*/
// Discovery is resource intensive. Make sure it isn't going on
// when you attempt to connect and pass your message.
btAdapter.cancelDiscovery();
// Establish the connection. This will block until it connects.
Log.d(TAG, "...Connecting...");
try {
btSocket.connect();
Log.d(TAG, "....Connection ok...");
} catch (IOException e) {
try {
btSocket.close();
} catch (IOException e2) {
errorExit("Fatal Error", "In onResume() and unable to close socket during connection failure" + e2.getMessage() + ".");
}
}
// Create a data stream so we can talk to server.
Log.d(TAG, "...Create Socket...");
mConnectedThread = new ConnectedThread(btSocket);
mConnectedThread.start();
}
@Override
public void onPause() {
super.onPause();
Log.d(TAG, "...In onPause()...");
try {
btSocket.close();
} catch (IOException e2) {
errorExit("Fatal Error", "In onPause() and failed to close socket." + e2.getMessage() + ".");
}
}
private void checkBTState() {
// Check for Bluetooth support and then check to make sure it is turned on
// Emulator doesn't support Bluetooth and will return null
if(btAdapter==null) {
errorExit("Fatal Error", "Bluetooth not support");
} else {
if (btAdapter.isEnabled()) {
Log.d(TAG, "...Bluetooth ON...");
} else {
//Prompt user to turn on Bluetooth
Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBtIntent, 1);
}
}
}
private void errorExit(String title, String message){
Toast.makeText(getBaseContext(), title + " - " + message, Toast.LENGTH_LONG).show();
finish();
}
private class ConnectedThread extends Thread {
private final InputStream mmInStream;
private final OutputStream mmOutStream;
public ConnectedThread(BluetoothSocket socket) {
InputStream tmpIn = null;
OutputStream tmpOut = null;
// Get the input and output streams, using temp objects because
// member streams are final
try {
tmpIn = socket.getInputStream();
tmpOut = socket.getOutputStream();
} catch (IOException e) { }
mmInStream = tmpIn;
mmOutStream = tmpOut;
}
public void run() {
byte[] buffer = new byte[256]; // buffer store for the stream
int bytes; // bytes returned from read()
// Keep listening to the InputStream until an exception occurs
while (true) {
try {
// Read from the InputStream
bytes = mmInStream.read(buffer); // Get number of bytes and message in "buffer"
h.obtainMessage(RECIEVE_MESSAGE, bytes, -1, buffer).sendToTarget(); // Send to message queue Handler
} catch (IOException e) {
break;
}
}
}
/* Call this from the main activity to send data to the remote device */
public void write(String message) {
Log.d(TAG, "...Data to send: " + message + "...");
byte[] msgBuffer = message.getBytes();
try {
mmOutStream.write(msgBuffer);
} catch (IOException e) {
Log.d(TAG, "...Error data send: " + e.getMessage() + "...");
}
}
}
}
答案 0 :(得分：0)
好的，首先我对adruino编码一无所知，但为了与usb设备进行通信，android使用USB Host Api，转到link。这里有一个教程可能帮助Android与Adruino接口， how to communicate between the Arduino Uno and your computer using plain USB bulk and control transfers 希望这有帮助