问题1 。我在连接BLE外围设备时遇到133连接状态错误。
问题2。很少有时间回到扫描活动，应用程序无法显示已扫描的BLE设备。
为了解决这个问题我正在关闭然后再打开外围设备，然后再次开始扫描，扫描将显示。
以下是 Bluetoothleservice.java文件
import android.app.Service;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothGatt;
import android.bluetooth.BluetoothGattCallback;
import android.bluetooth.BluetoothGattCharacteristic;
import android.bluetooth.BluetoothGattDescriptor;
import android.bluetooth.BluetoothGattService;
import android.bluetooth.BluetoothManager;
import android.bluetooth.BluetoothProfile;
import android.content.Context;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.util.Log;
import java.util.List;
import java.util.UUID;
public class BluetoothLeService extends Service {
private final static String TAG = "TAG";
private BluetoothManager mBluetoothManager;
private BluetoothAdapter mBluetoothAdapter;
private String mBluetoothDeviceAddress;
private BluetoothGatt mBluetoothGatt;
private int mConnectionState = STATE_DISCONNECTED;
private static final int STATE_DISCONNECTED = 0;
private static final int STATE_CONNECTING = 1;
private static final int STATE_CONNECTED = 2;
public final static String ACTION_GATT_CONNECTED =
"com.bledemo.bluetooth.le.ACTION_GATT_CONNECTED";
public final static String ACTION_GATT_DISCONNECTED =
"com.bledemo.bluetooth.le.ACTION_GATT_DISCONNECTED";
public final static String ACTION_GATT_SERVICES_DISCOVERED =
"com.bledemo.bluetooth.le.ACTION_GATT_SERVICES_DISCOVERED";
public final static String ACTION_DATA_AVAILABLE =
"com.bledemo.bluetooth.le.ACTION_DATA_AVAILABLE";
public final static String ACTION_DATA_WRITTEN =
"com.bledemo.bluetooth.le.ACTION_DATA_WRITTEN";
public final static String EXTRA_DATA =
"com.bledemo.bluetooth.le.EXTRA_DATA";
public final static UUID NORDIC_UART_SERVICE = UUID.fromString("6e400001-b5a3-f393-e0a9-e50e24dcca9e");
public final static UUID TX_CHARCTERSTIC = UUID.fromString("6e400003-b5a3-f393-e0a9-e50e24dcca9e");
public final static UUID RX_CHARCTERSTIC = UUID.fromString("6e400002-b5a3-f393-e0a9-e50e24dcca9e");
//Vinay
BluetoothGattCharacteristic
mHomeCharacteristic,
mTempCharacteristic,
mLightCharacteristic,
mLightCharacteristicNotify,
mLightCharacteristicRead,
mDeviceNameCharacteristic;
// Implements callback methods for GATT events that the app cares about. For bledemo,
// connection change and services discovered.
private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() {
@Override
public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
String intentAction;
Log.i(TAG, "onConnectionStateChange status " + status + " newstate " + newState);
if (newState == BluetoothProfile.STATE_CONNECTED) {
intentAction = ACTION_GATT_CONNECTED;
mConnectionState = STATE_CONNECTED;
broadcastUpdate(intentAction);
Log.i(TAG, "Connected to GATT server.");
// Attempts to discover services after successful connection.
boolean isServiceDiscovered = mBluetoothGatt.discoverServices();
Log.i(TAG, "Attempting to start service discovery:" +
isServiceDiscovered);
} else if (newState == BluetoothProfile.STATE_DISCONNECTED) {
intentAction = ACTION_GATT_DISCONNECTED;
mConnectionState = STATE_DISCONNECTED;
Log.i(TAG, "Disconnected from GATT server.");
broadcastUpdate(intentAction);
}
}
@Override
public void onServicesDiscovered(BluetoothGatt gatt, int status) {
if (status == BluetoothGatt.GATT_SUCCESS) {
final List<BluetoothGattService> services = gatt.getServices();
for (BluetoothGattService service : services) {
System.out.println("service hrs discoverd " + service.getUuid());
if (service.getUuid().equals(NORDIC_UART_SERVICE)) {
System.out.println("gap service dicovered" + NORDIC_UART_SERVICE);
mLightCharacteristic = service.getCharacteristic(RX_CHARCTERSTIC);
// Log.d(TAG, "onServicesDiscovered: " + mLightCharacteristic.getUuid());
}
if (service.getUuid().equals(NORDIC_UART_SERVICE)) {
System.out.println("gap service dicovered");
mDeviceNameCharacteristic = service.getCharacteristic(RX_CHARCTERSTIC);
}
if (service.getUuid().equals(NORDIC_UART_SERVICE)) {
mLightCharacteristicNotify = service.getCharacteristic(TX_CHARCTERSTIC);
// mLightCharacteristicRead = service.getCharacteristic(LIGHT_CHARACTERISTIC_READ_UUID);
setCharacteristicNotification(mLightCharacteristicNotify, true);
System.out.println("service discoverd ");
}
}
// broadcastUpdate(ACTION_GATT_SERVICES_DISCOVERED);
} else {
Log.w(TAG, "onServicesDiscovered received: " + status);
}
}
@Override
public void onCharacteristicRead(BluetoothGatt gatt,
BluetoothGattCharacteristic characteristic,
int status) {
if (status == BluetoothGatt.GATT_SUCCESS) {
broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);
}
}
@Override
public void onCharacteristicChanged(BluetoothGatt gatt,
BluetoothGattCharacteristic characteristic) {
Log.e(TAG, "onCharacteristicChanged");
broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);
}
@Override
public void onCharacteristicWrite(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) {
super.onCharacteristicWrite(gatt, characteristic, status);
broadcastUpdate(ACTION_DATA_WRITTEN, characteristic, status);
}
@Override
public void onDescriptorWrite(BluetoothGatt gatt, BluetoothGattDescriptor descriptor, int status) {
super.onDescriptorWrite(gatt, descriptor, status);
Log.d(TAG, "onDescriptorWrite "+status);
broadcastUpdate(ACTION_GATT_SERVICES_DISCOVERED);
}
};
private void broadcastUpdate(final String action) {
final Intent intent = new Intent(action);
sendBroadcast(intent);
}
private void broadcastUpdate(final String action, final BluetoothGattCharacteristic characteristic, int status) {
final Intent intent = new Intent(action);
intent.putExtra("status", status);
sendBroadcast(intent);
}
private void broadcastUpdate(final String action,
final BluetoothGattCharacteristic characteristic) {
final Intent intent = new Intent(action);
// This is special handling for the Heart Rate Measurement profile. Data parsing is
// carried out as per profile specifications:
// http://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.heart_rate_measurement.xml
// For all other profiles, writes the data formatted in HEX.
final byte[] data = characteristic.getValue();
if (data != null && data.length > 0) {
/*final StringBuilder stringBuilder = new StringBuilder(data.length);
for (byte byteChar : data)
stringBuilder.append(String.format("%02X ", byteChar));*/
// Log.e("data available", "data available " + stringBuilder.toString());
intent.putExtra(EXTRA_DATA, new String(data).trim());
}
sendBroadcast(intent);
}
public class LocalBinder extends Binder {
public BluetoothLeService getService() {
return BluetoothLeService.this;
}
}
@Override
public IBinder onBind(Intent intent) {
return mBinder;
}
@Override
public boolean onUnbind(Intent intent) {
// After using a given device, you should make sure that BluetoothGatt.close() is called
// such that resources are cleaned up properly. In this particular bledemo, close() is
// invoked when the UI is disconnected from the Service.
close();
return super.onUnbind(intent);
}
private final IBinder mBinder = new LocalBinder();
/**
* Initializes a reference to the local Bluetooth adapter.
*
* @return Return true if the initialization is successful.
*/
public boolean initialize() {
// For API level 18 and above, get a reference to BluetoothAdapter through
// BluetoothManager.
if (mBluetoothManager == null) {
mBluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
if (mBluetoothManager == null) {
Log.e(TAG, "Unable to initialize BluetoothManager.");
return false;
}
}
mBluetoothAdapter = mBluetoothManager.getAdapter();
if (mBluetoothAdapter == null) {
Log.e(TAG, "Unable to obtain a BluetoothAdapter.");
return false;
}
return true;
}
/**
* Connects to the GATT server hosted on the Bluetooth LE device.
*
* @param address The device address of the destination device.
* @return Return true if the connection is initiated successfully. The connection result
* is reported asynchronously through the
* {@code BluetoothGattCallback#onConnectionStateChange(android.bluetooth.BluetoothGatt, int, int)}
* callback.
*/
public boolean connect(final String address) {
Log.i("OK","Hiiiii, i am here");
Log.i("OK","BLE MAC : "+address);
if (mBluetoothAdapter == null || address == null) {
Log.w(TAG, "BluetoothAdapter not initialized or unspecified address.");
return false;
}
// Previously connected device. Try to reconnect.
if (mBluetoothDeviceAddress != null && address.equals(mBluetoothDeviceAddress)
&& mBluetoothGatt != null) {
Log.d(TAG, "Trying to use an existing mBluetoothGatt for connection.");
if (mBluetoothGatt.connect()) {
mConnectionState = STATE_CONNECTING;
return true;
} else {
Log.d(TAG, "could not make the connection");
return false;
}
}
final BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);
if (device == null) {
Log.w(TAG, "Device not found. Unable to connect.");
return false;
}
// We want to directly connect to the device, so we are SettingDevice the autoConnect
// parameter to false.
mBluetoothGatt = device.connectGatt(this, false, mGattCallback);
Log.d(TAG, "Trying to create a new connection.");
mBluetoothDeviceAddress = address;
mConnectionState = STATE_CONNECTING;
return true;
}
/**
* Disconnects an existing connection or cancel a pending connection. The disconnection result
* is reported asynchronously through the
* {@code BluetoothGattCallback#onConnectionStateChange(android.bluetooth.BluetoothGatt, int, int)}
* callback.
*/
public void disconnect() {
if (mBluetoothAdapter == null || mBluetoothGatt == null) {
Log.w(TAG, "BluetoothAdapter not initialized");
return;
}
mBluetoothGatt.disconnect();
}
/**
* After using a given BLE device, the app must call this method to ensure resources are
* released properly.
*/
public void close() {
if (mBluetoothGatt == null) {
return;
}
mBluetoothGatt.close();
mBluetoothGatt = null;
}
/**
* Request a read on a given {@code BluetoothGattCharacteristic}. The read result is reported
* asynchronously through the {@code BluetoothGattCallback#onCharacteristicRead(android.bluetooth.BluetoothGatt, android.bluetooth.BluetoothGattCharacteristic, int)}
* callback.
*
* @param characteristic The characteristic to read from.
*/
public void readCharacteristic(BluetoothGattCharacteristic characteristic) {
if (mBluetoothAdapter == null || mBluetoothGatt == null) {
Log.w(TAG, "BluetoothAdapter not initialized");
return;
}
mBluetoothGatt.readCharacteristic(characteristic);
}
/**
* Enables or disables notification on a give characteristic.
*
* @param characteristic Characteristic to act on.
* @param enabled If true, enable notification. False otherwise.
*/
/*public void setCharacteristicNotification(BluetoothGattCharacteristic characteristic,
boolean enabled) {
if (mBluetoothAdapter == null || mBluetoothGatt == null) {
Log.w(TAG, "BluetoothAdapter not initialized");
return;
}
mBluetoothGatt.setCharacteristicNotification(characteristic, enabled);
// This is specific to Heart Rate Measurement.
*//*if (UUID_HEART_RATE_MEASUREMENT.equals(characteristic.getUuid())) {
BluetoothGattDescriptor descriptor = characteristic.getDescriptor(
UUID.fromString(SampleGattAttributes.CLIENT_CHARACTERISTIC_CONFIG));
descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
mBluetoothGatt.writeDescriptor(descriptor);
}*//*
}*/
public void setCharacteristicNotification(BluetoothGattCharacteristic characteristic,
boolean enabled) {
if (mBluetoothAdapter == null || mBluetoothGatt == null) {
Log.w(TAG, "BluetoothAdapter not initialized");
return;
}
BluetoothGattDescriptor descriptor1 = characteristic.getDescriptor(
UUID.fromString(SampleGattAttributes.CLIENT_CHARACTERISTIC_CONFIG));
if (descriptor1 != null) {
descriptor1.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
while (!mBluetoothGatt.writeDescriptor(descriptor1)) {
mBluetoothGatt.writeDescriptor(descriptor1);
}
Log.w(TAG, "notification enable");
mBluetoothGatt.setCharacteristicNotification(characteristic, enabled);
// mBluetoothGatt.setCharacteristicNotification(characteristic, true);
} else {
Log.w(TAG, "notification failed no decriptor");
}
/* List<BluetoothGattDescriptor> descriptor1ist = characteristic.getDescriptors();
for (BluetoothGattDescriptor descriptor : descriptor1ist) {
descriptor.setValue(BluetoothGattDescriptor.ENABLE_INDICATION_VALUE);
mBluetoothGatt.writeDescriptor(descriptor);
}
mBluetoothGatt.setCharacteristicNotification(characteristic, true);*/
}
//6e400002-b5a3-f393-e0a9-e50e24dcca9e
/**
* Retrieves a list of supported GATT services on the connected device. This should be
* invoked only after {@code BluetoothGatt#discoverServices()} completes successfully.
*
* @return A {@code List} of supported services.
*/
public List<BluetoothGattService> getSupportedGattServices() {
if (mBluetoothGatt == null) return null;
return mBluetoothGatt.getServices();
}
public void ON_OFF_Logic(String command) {
if (mLightCharacteristic != null) {
mLightCharacteristic.setWriteType(BluetoothGattCharacteristic.WRITE_TYPE_DEFAULT);
mLightCharacteristic.setValue(command);
boolean statusLocal = mBluetoothGatt.writeCharacteristic(mLightCharacteristic);
Log.e("write status", "status " + command + " charactristic " + mLightCharacteristic.getUuid().toString());
} /*else {
=======
try {
if (mLightCharacteristic != null) {
mLightCharacteristic.setWriteType(BluetoothGattCharacteristic.WRITE_TYPE_DEFAULT);
mLightCharacteristic.setValue(command);
boolean statusLocal = mBluetoothGatt.writeCharacteristic(mLightCharacteristic);
Log.e("write status", "status " + command + " charactristic " + mLightCharacteristic.getUuid().toString());
}
}catch (Exception e){
Log.i("OK",""+e.getLocalizedMessage());
}
/*else {
>>>>>>> 56646d2f8f3420a9a3f2fa71374f3c56b4029501
Log.e("light char","light char is null");
if (mBluetoothGatt!=null) {
mBluetoothGatt.disconnect();
}
}*/
}
//Change Device Name.
public boolean changeDeviceName(String Name) {
if (mDeviceNameCharacteristic != null) {
System.out.println("writing device name");
mDeviceNameCharacteristic.setValue(Name);
mBluetoothGatt.writeCharacteristic(mDeviceNameCharacteristic);
return true;
} else {
System.out.println("Device Name Characteristic is not found");
return false;
}
}
}