/**
简化蓝牙操作的工具类
*/
public class BluetoothUtils {
public static final int ENABLE_BLUETOOTH = 0; // 发现蓝牙未开启发送的开启蓝牙消息
public static final int DEVICE_SCAN_STARTED = 1; // 扫描设备开始时发送的消息
public static final int DEVICE_SCAN_STOPPED = 2; // 扫描终止时发送的消息
public static final int DEVICE_SCAN_COMPLETED = 3; // 扫描设备完成时发送的消息
public static final int DEVICE_CONNECTED = 4; // 连接上设备时发送的消息
public static final int DATA_SENDED = 5; // 发送数据后发送清除edittext内容的消息
public static final int DATA_READED = 6; // 读取到数据后发送使适配器更新的消息
public static final int CHARACTERISTIC_ACCESSIBLE = 7; // 可操作特征值时发送的消息
private boolean mScanning; // 设备扫描状态的标志
private byte[] readedData; // 读取到的字节数组数据
private Context context;
private Handler handler;
private BluetoothAdapter mBleAdapter;
private BluetoothGatt mBluetoothGatt;
private BluetoothGattCharacteristic mCharacteristic;
private DeviceListAdapter mDeviceListAdapter;
private DataBuffer dataBuffer;
public BluetoothUtils(Context context, Handler handler) {
this.context = context;
this.handler = handler;
dataBuffer = new DataBuffer(4096);
}
public void initialize() {
BluetoothManager manager = (BluetoothManager)
context.getSystemService(Context.BLUETOOTH_SERVICE);
mBleAdapter = manager.getAdapter();
mDeviceListAdapter = new DeviceListAdapter(context);
}
/**
* 检测蓝牙开启状态，若未开启则发送开启蓝牙消息
*/
public void checkBluetoothEnabled() {
if (mBleAdapter == null || !mBleAdapter.isEnabled()) {
Message message = new Message();
message.what = ENABLE_BLUETOOTH;
handler.sendMessage(message);
}
}
/**
* 检测当前设备扫描的状态，若在扫描中则停止扫描
*/
public void checkDeviceScanning() {
if (mScanning) {
scanBleDevice(false);
}
}
/**
* 检测蓝牙连接状态，若已连接则断开并关闭连接
*/
public void checkGattConnected() {
if (mBluetoothGatt != null) {
if (mBluetoothGatt.connect()) {
mBluetoothGatt.disconnect();
mBluetoothGatt.close();
}
}
}
/**
* 扫描设备的方法，扫描按钮点击后调用，扫描持续3秒
*
* @param enable 扫描方法的使能标志
*/
public void scanBleDevice(boolean enable) {
if (enable) {
handler.postDelayed(new Runnable() {
@Override
public void run() {
mScanning = false;
mBleAdapter.stopLeScan(mLeScanCallback);
Message message = new Message();
message.what = DEVICE_SCAN_COMPLETED;
handler.sendMessage(message);
}
}, 5000);
mScanning = true;
//mBleAdapter.startLeScan(new UUID[] {UUID.fromString("0000F445-0000-1000-8000-00805F9B34FB"),UUID.fromString("0000FEE0-0000-1000-8000-00805F9B34FB")},mLeScanCallback);
mBleAdapter.startLeScan(mLeScanCallback);
Message message = new Message();
message.what = DEVICE_SCAN_STARTED;
handler.sendMessage(message);
} else {
mScanning = false;
mBleAdapter.stopLeScan(mLeScanCallback);
Message message = new Message();
message.what = DEVICE_SCAN_STOPPED;
handler.sendMessage(message);
}
}
/**
* 往特征值里写入数据的方法
*
* @param data 字节数组类型的数据
*/
public void writeData(byte[] data) {
if (mBluetoothGatt != null) {
if (mBluetoothGatt.connect() && mCharacteristic != null &&
data != null) {
mCharacteristic.setValue(data);
mBluetoothGatt.writeCharacteristic(mCharacteristic);
}
}
}
/**
* 创建一个新的设备列表对话框
*/
public void creatDeviceListDialog() {
if (mDeviceListAdapter.getCount() > 0) {
new AlertDialog.Builder(context).setCancelable(true)
.setAdapter(mDeviceListAdapter, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
BluetoothDevice device = mDeviceListAdapter.getDevice(which);
mBluetoothGatt = device.connectGatt(context, false, mGattCallback);
}
}).show();
}
}
/**
* 开启特征值的notification，然后才能读取数据
*/
public void setCharacteristicNotification() {
String clientUuid = "00002902-0000-1000-8000-00805f9b34fb";
mBluetoothGatt.setCharacteristicNotification(mCharacteristic, true);
BluetoothGattDescriptor descriptor = mCharacteristic.
getDescriptor(UUID.fromString(clientUuid));
descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
mBluetoothGatt.writeDescriptor(descriptor);
}
/**
* 字节数组转化为标准的16进制字符串
*
* @param bytes 字节数组数据
* @return 字符串
*/
public String bytesToString(byte[] bytes) {
final char[] hexArray = "0123456789ABCDEF".toCharArray();
char[] hexChars = new char[bytes.length * 2];
StringBuilder sb = new StringBuilder();
for (int i = 0; i < bytes.length; i++) {
int v = bytes[i] & 0xFF;
hexChars[i * 2] = hexArray[v >>> 4];
hexChars[i * 2 + 1] = hexArray[v & 0x0F];
sb.append(hexChars[i * 2]);
sb.append(hexChars[i * 2 + 1]);
sb.append(' ');
}
return sb.toString();
}
/**
* 将字符串转为16进制值的字节数组
*
* @param s 字符串数据
* @return buf 字节数组
*/
public byte[] stringToBytes(String s) {
byte[] buf = new byte[s.length() / 2];
for (int i = 0; i < buf.length; i++) {
try {
buf[i] = (byte) Integer.parseInt(s.substring(i * 2, i * 2 + 2), 16);
} catch (NumberFormatException e) {
e.printStackTrace();
}
}
return buf;
}
/**
* Ascii编码的字节数组转化为对应的字符串
*
* @param bytes 字节数组
* @return 字符串
*/
public String asciiToString(byte[] bytes) {
char[] buf = new char[bytes.length];
StringBuilder sb = new StringBuilder();
for (int i = 0; i < buf.length; i++) {
buf[i] = (char) bytes[i];
sb.append(buf[i]);
}
return sb.toString();
}
/**
* 变换文本的方法，有动画效果
*
* @param textView 目标文本view对象
* @param convertTextId 变换后的文本resId
*/
public void convertText(final TextView textView, final int convertTextId) {
final Animation scaleIn = AnimationUtils.loadAnimation(context,
R.anim.text_scale_in);
Animation scaleOut = AnimationUtils.loadAnimation(context,
R.anim.text_scale_out);
scaleOut.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
textView.setText(convertTextId);
textView.startAnimation(scaleIn);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
textView.startAnimation(scaleOut);
}
/**
* 获取已连接设备的设备名
*
* @return 字符串形式的设备名
*/
public String getDeviceName() {
return mBluetoothGatt.getDevice().getName();
}
/**
* 获取已读取的数据
*
* @return 字节数组数据
*/
public byte[] getReadedData() {
return readedData;
}
/**
* 获取已读取的数据长度
*
* @return
*/
public int getDataLen() {
return dataBuffer.getSize();
}
/**
* 获取已读取的数据
*
* @return
*/
public int getData(byte[] data_out,int len) {
return dataBuffer.dequeue(data_out, len);
}
/**
* 连接Gatt之后的回调
*/
private BluetoothGattCallback mGattCallback =
new BluetoothGattCallback() {
@Override
public void onConnectionStateChange(BluetoothGatt gatt, int status,
int newState) {
if (newState == BluetoothProfile.STATE_CONNECTED) {
Message message = new Message();
message.what = DEVICE_CONNECTED;
handler.sendMessage(message);
mDeviceListAdapter.clear();
gatt.discoverServices();
}
}
@Override
public void onCharacteristicChanged(BluetoothGatt gatt,
BluetoothGattCharacteristic characteristic) {
if (characteristic != null) {
dataBuffer.enqueue(characteristic.getValue(), characteristic.getValue().length);
Message message = new Message();
message.what = DATA_READED;
handler.sendMessage(message);
}
}
@Override
public void onCharacteristicWrite(BluetoothGatt gatt,
BluetoothGattCharacteristic characteristic, int status) {
if (status == BluetoothGatt.GATT_SUCCESS) {
Message message = new Message();
message.what = DATA_SENDED;
handler.sendMessage(message);
}
}
@Override
public void onServicesDiscovered(BluetoothGatt gatt, int status) {
if (status == BluetoothGatt.GATT_SUCCESS) {
// 得到目标特征值
String serviceUuid = "0000fee0-0000-1000-8000-00805f9b34fb";
String characterUuid = "0000fee1-0000-1000-8000-00805f9b34fb";
BluetoothGattService service = gatt.getService(UUID
.fromString(serviceUuid));
mCharacteristic = service.getCharacteristic(UUID
.fromString(characterUuid));
//开启通知
setCharacteristicNotification();
Message message = new Message();
message.what = CHARACTERISTIC_ACCESSIBLE;
handler.sendMessage(message);
}
}
};
/**
* 蓝牙扫描时的回调
*/
private BluetoothAdapter.LeScanCallback mLeScanCallback =
new BluetoothAdapter.LeScanCallback() {
@Override
public void onLeScan(BluetoothDevice device, int rssi, byte[] scanRecord) {
String buf = bytesToString(scanRecord);
System.out.println("BluetoothUtils.enclosing_method()："+device.getName()+"\nscanRecord"+buf+"rssi:"+rssi);
//if ("E0 FE".equals(buf.substring(0, buf.length())))
{
mDeviceListAdapter.addDevice(device);
mDeviceListAdapter.notifyDataSetChanged();
}
}
};
}
如上是蓝牙操作的工具类，想在蓝牙模块与app断开连接时，app那边有提示大概怎么实现
列表项目
這裡不就是連線狀態的回調嗎？