Hi all, I am new to android app programming. I have code for a heart monitor graph app (not my own code). But I wish to get results from my heart sensor to the app using Bluetooth. Can anyone help me on how to add Bluetooth to the code. Here is the main code I am using. Thank you.
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package
com.mlst.heartmonitor;
import
java.io.FileDescriptor;
import
java.io.FileInputStream;
import
java.io.FileOutputStream;
import
java.io.IOException;
import
android.animation.Animator;
import
android.animation.Animator.AnimatorListener;
import
android.app.Activity;
import
android.app.PendingIntent;
import
android.content.BroadcastReceiver;
import
android.content.Context;
import
android.content.Intent;
import
android.content.IntentFilter;
import
android.hardware.usb.UsbAccessory;
import
android.hardware.usb.UsbManager;
import
android.media.MediaPlayer;
import
android.os.Bundle;
import
android.os.Handler;
import
android.os.Message;
import
android.os.ParcelFileDescriptor;
import
android.util.Log;
import
android.widget.ImageView;
import
android.widget.TextView;
public
class Main extends Activity implements Runnable {
privatestaticfinal String TAG = "Main";
privatestaticfinal String ACTION_USB_PERMISSION = "com.mlst.helloarduino.Main.action.USB_PERMISSION";
private ImageView img;
private UsbManager mUsbManager;
private PendingIntent mPermissionIntent;
private UsbAccessory mAccessory;
privatebooleanmPermissionRequestPending;
private Handler handler;
private TextView label;
private MediaPlayer beat;
private GraphView graph;
@Override
publicvoid onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.
main);
beat = MediaPlayer.create(this, R.raw.beat);
graph = (GraphView) findViewById(R.id.graph);
img = (ImageView) findViewById(R.id.indicator);
label = (TextView) findViewById(R.id.label);
mUsbManager = (UsbManager) getSystemService(Context.USB_SERVICE);
mPermissionIntent = PendingIntent.getBroadcast(this, 0, new Intent(ACTION_USB_PERMISSION), 0);
IntentFilter filter =
new IntentFilter(ACTION_USB_PERMISSION);
filter.addAction(UsbManager.
ACTION_USB_ACCESSORY_DETACHED);
registerReceiver(
mUsbReceiver, filter);
handler = new Handler() {
@Override
publicvoid handleMessage(Message msg) {
if (msg.what == 0) {
HeartMonitorMessage hm = (HeartMonitorMessage) msg.
obj;
if (hm.beat) {
pumpHeart();
}
else {
label.setText(String.valueOf(hm.rate));
}
}
}
};
}
@Override
protectedvoid onPause() {
unregisterReceiver(
mUsbReceiver);
super.onPause();
}
privatefinal BroadcastReceiver mUsbReceiver = new BroadcastReceiver() {
@Override
publicvoid onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (ACTION_USB_PERMISSION.equals(action)) {
synchronized (this) {
UsbAccessory accessory = (UsbAccessory) intent.getParcelableExtra(UsbManager.
EXTRA_ACCESSORY);
if (intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED, false)) {
openAccessory(accessory);
}
else {
Log.d(
TAG, "permission denied for accessory " + accessory);
}
mPermissionRequestPending = false;
}
}
elseif (UsbManager.ACTION_USB_ACCESSORY_DETACHED.equals(action)) {
UsbAccessory accessory = (UsbAccessory) intent.getParcelableExtra(UsbManager.
EXTRA_ACCESSORY);
if (accessory != null && accessory.equals(mAccessory)) {
closeAccessory();
}
}
}
};
private ParcelFileDescriptor fileDescriptor;
private FileInputStream input;
private FileOutputStream output;
protectedvoid openAccessory(UsbAccessory accessory) {
fileDescriptor = mUsbManager.openAccessory(accessory);
if (fileDescriptor != null) {
mAccessory = accessory;
FileDescriptor fd =
fileDescriptor.getFileDescriptor();
input = new FileInputStream(fd);
output = new FileOutputStream(fd);
Thread t =
new Thread(this, "Heart Monitor");
t.start();
Log.d(
TAG, "accessory opened");
}
else {
Log.d(
TAG, "accessory open fail");
}
}
protectedvoid closeAccessory() {
try {
if (fileDescriptor != null) {
fileDescriptor.close();
}
}
catch (IOException e) {
}
finally {
fileDescriptor = null;
mAccessory = null;
}
}
@Override
protectedvoid onResume() {
Intent intent = getIntent();
if (input != null && output != null) {
return;
}
UsbAccessory[] accessories =
mUsbManager.getAccessoryList();
UsbAccessory accessory = (accessories ==
null ? null : accessories[0]);
if (accessory != null) {
if (mUsbManager.hasPermission(accessory)) {
openAccessory(accessory);
}
else {
synchronized (mUsbReceiver) {
if (!mPermissionRequestPending) {
mUsbManager.requestPermission(accessory, mPermissionIntent);
mPermissionRequestPending = true;
}
}
}
}
else {
Log.d(
TAG, "mAccessory is null");
}
super.onResume();
}
privatevoid pumpHeart() {
img.animate().scaleXBy(0.2f).scaleYBy(0.2f).setDuration(50).setListener(scaleUpListener);
playBeat();
graph.setDrawPulse(true);
}
private AnimatorListener scaleDownListener = new AnimatorListener() {
@Override
publicvoid onAnimationStart(Animator animation) {
// TODO Auto-generated method stub
}
@Override
publicvoid onAnimationRepeat(Animator animation) {
// TODO Auto-generated method stub
}
@Override
publicvoid onAnimationEnd(Animator animation) {
// img.animate().scaleXBy(0.2f).scaleYBy(0.2f).setDuration(100).setListener(scaleUpListener);
}
@Override
publicvoid onAnimationCancel(Animator animation) {
// TODO Auto-generated method stub
}
};
private AnimatorListener scaleUpListener = new AnimatorListener() {
@Override
publicvoid onAnimationStart(Animator animation) {
// TODO Auto-generated method stub
}
@Override
publicvoid onAnimationRepeat(Animator animation) {
// TODO Auto-generated method stub
}
@Override
publicvoid onAnimationEnd(Animator animation) {
img.animate().scaleXBy(-0.2f).scaleYBy(-0.2f).setDuration(50).setListener(scaleDownListener);
}
@Override
publicvoid onAnimationCancel(Animator animation) {
// TODO Auto-generated method stub
}
};
@Override
publicvoid run() {
byte[] buffer = newbyte[16384];
int i;
int retvalue = 0;
while (retvalue >= 0) {
try {
retvalue =
input.read(buffer);
}
catch (IOException e) {
e.printStackTrace();
break;
}
i = 0;
Message m = Message.obtain(
handler, 0);
byte command = buffer[0];
byte value = buffer[1];
HeartMonitorMessage msg =
new HeartMonitorMessage();
if (command == 0) {
msg.
beat = true;
}
else {
msg.
beat = false;
}
msg.
rate = value & 0xFF;
m.
what = 0;
m.
obj = msg;
handler.sendMessage(m);
}
}
class HeartMonitorMessage {
publicbooleanbeat;
publicintrate;
}
privatevoid playBeat() {
if(!beat.isPlaying()){
beat.start();
}
else{
beat.stop();
beat.release();
beat = MediaPlayer.create(this, R.raw.beat);
beat.start();
}
}
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