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import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.widget.Toast;
import android.content.*;
import android.util.Log;
public class Bluetooth_Test extends Activity {
private static final String TAG = "Bluetooth_Test";
private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
private static String bt_hostname = "openplatform";
private BluetoothAdapter mBluetoothAdapter = null;
private BluetoothDevice mBluetoothDevice = null;
private final int REQUEST_ENABLE_BT = 1;
private static final boolean D = true; //for debug use
private static boolean start_discovery = false;
//Bluetooth thread variable
private ConnectThread mConnectThread;
private ConnectedThread mConnectedThread;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (mBluetoothAdapter == null) {
// Device does not support Bluetooth
Toast.makeText(this,
"此裝置沒有藍牙設備",
Toast.LENGTH_LONG).show();
finish();
return;
}
if (!mBluetoothAdapter.isEnabled()) {
//Enable the bluetooth if this is disabled
Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBtIntent,REQUEST_ENABLE_BT);
}
else {
//Bluetooth was find start search bluetooth device
listItems.add("程式已啟動");
connectLED();
}
@Override
public void onDestroy() {
super.onDestroy();
if (D) Log.e(TAG, "+++ ON Destory +++");
//stop discovery bluetooth device
if(start_discovery) {
mBluetoothAdapter.cancelDiscovery();
unregisterReceiver(myReceiver);
}
//cancel the mConnectThread
if (mConnectThread != null)
mConnectThread.cancel();
//cancel the mConnectedThread
if (mConnectedThread != null)
mConnectedThread.cancel();
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == REQUEST_ENABLE_BT){
if(resultCode==RESULT_OK){
//user enable the bluetooth, start search device
listItems.add("程式已啟動");
connectDevice();
}
}
}
private void connectDevice() {
if(D) Log.e(TAG, "+++ connectDevice() +++");
//Query paired devices
Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices();
// If there are paired devices
if (pairedDevices.size() > 0) {
// Loop through paired devices
for (BluetoothDevice device : pairedDevices) {
//connect the device if the device match the bt_hostname
if(device.getName().equals(bt_hostname)) {
mBluetoothDevice = device;
if (D) Log.e(TAG, "+++ connectDevice() - found pairedDevices("+ device.getName() +") +++");
}
}
}
else {
//Register the BroadcastReceiver
IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
registerReceiver(myReceiver,filter);
//set the flag to unregister the myReceiver when on destroy
start_discovery = true;
//start to discovery led device
doDiscovery();
}
//Create the connection thread
if (D) Log.e(TAG, "+++ connectDevice() - mBluetoothDevice("+ mBluetoothDevice.getName() +") +++");
mConnectThread = new ConnectThread(mBluetoothDevice);
mConnectThread.start();
}
/** Will cancel an in-progress connection, and close the socket */
public void cancel() {
if (D) Log.e(TAG, "+++ ConnectThread - cancel() ("+ mmDevice.getName() +") +++");
try {
mmSocket.close();
} catch (IOException e) { }
}
}
private class ConnectedThread extends Thread {
private final BluetoothSocket mmSocket;
private final InputStream mmInStream;
private final OutputStream mmOutStream;
public ConnectedThread(BluetoothSocket socket) {
if (D) Log.e(TAG, "+++ ConnectedThread() +++");
mmSocket = 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() {//如果需要接收資料的話,把下面的comment 轉為 statement
/*
byte[] buffer = new byte[1024]; // 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);
// Send the obtained bytes to the UI Activity
mHandler.obtainMessage(MESSAGE_READ, bytes, -1, buffer)
.sendToTarget();
} catch (IOException e) {
break;
}
}
*/
write();
}
/* Call this from the main Activity to send data to the remote device */
//public void write(byte[] bytes) {
public void write() {
String str = "1234\r\n";
byte[] bytes = str.getBytes();
if (D) Log.e(TAG, "+++ ConnectedThread - Write() +++");
try {
mmOutStream.write(bytes);
} catch (IOException e) { }
}
/* Call this from the main Activity to shutdown the connection */
public void cancel() {
try {
mmSocket.close();
} catch (IOException e) { }
}
}
}

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