Java tutorial
/* * Copyright (C) 2013 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package de.blinkt.openvpn.bluetooth.service; 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.Build; import android.os.IBinder; import android.support.v4.content.LocalBroadcastManager; import android.text.TextUtils; import android.util.Log; import java.io.Serializable; import java.util.ArrayList; import java.util.List; import java.util.UUID; import de.blinkt.openvpn.bluetooth.util.HexStringExchangeBytesUtil; import de.blinkt.openvpn.core.ICSOpenVPNApplication; import de.blinkt.openvpn.util.CommonTools; /** * Service for managing connection and data communication with a GATT server hosted on a * given Bluetooth LE device. */ public class UartService extends Service implements Serializable { private final static String TAG = UartService.class.getSimpleName(); private BluetoothManager mBluetoothManager; public BluetoothAdapter mBluetoothAdapter; private BluetoothGatt mBluetoothGatt; public int mConnectionState = STATE_DISCONNECTED; private static final int STATE_DISCONNECTED = 0;// private static final int STATE_CONNECTING = 1;// public static final int STATE_CONNECTED = 2;//? public final static String ACTION_GATT_CONNECTED = "com.nordicsemi.nrfUART.ACTION_GATT_CONNECTED";//? public final static String ACTION_GATT_DISCONNECTED = "com.nordicsemi.nrfUART.ACTION_GATT_DISCONNECTED";//? public final static String ACTION_GATT_SERVICES_DISCOVERED = "com.nordicsemi.nrfUART.ACTION_GATT_SERVICES_DISCOVERED";//? public final static String ACTION_DATA_AVAILABLE = "com.nordicsemi.nrfUART.ACTION_DATA_AVAILABLE";//???? public final static String EXTRA_DATA = "com.nordicsemi.nrfUART.EXTRA_DATA";//????? public final static String DEVICE_DOES_NOT_SUPPORT_UART = "com.nordicsemi.nrfUART.DEVICE_DOES_NOT_SUPPORT_UART";//??? public final static String FINDED_SERVICE = "finded_service";//? public static final UUID CCCD = UUID.fromString("00002902-0000-1000-8000-00805f9b34fb"); public static final UUID RX_SERVICE_UUID = UUID.fromString("6E400001-B5A3-F393-E0A9-E50E24DCCA9E"); // public static final UUID RX_CHAR_UUID = UUID.fromString("6E400002-B5A3-F393-E0A9-E50E24DCCA9E"); // public static final UUID TX_CHAR_UUID1 = UUID.fromString("6E400003-B5A3-F393-E0A9-E50E24DCCA9E"); //GATT? private final static UUID GENERIC_ATTRIBUTE_SERVICE = UUID.fromString("00001801-0000-1000-8000-00805f9b34fb"); private final static UUID SERVICE_CHANGED_CHARACTERISTIC = UUID .fromString("00002A05-0000-1000-8000-00805f9b34fb"); // public static final UUID TX_CHAR_UUID2 = UUID.fromString("6E400004-B5A3-F393-E0A9-E50E24DCCA9F"); // public static final UUID TX_CHAR_UUID3 = UUID.fromString("6E400005-B5A3-F393-E0A9-E50E24DCCA9F"); private List<BluetoothGattService> BluetoothGattServices; // Implements callback methods for GATT events that the app cares about. For example, // Implements callback methods for GATT events that the app cares about. For example, // connection change and services discovered. //? ArrayList<String> messages; private boolean isWholeDataPackage = false;//?? private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() { //??? @Override public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) { String intentAction; if ((newState == BluetoothProfile.STATE_CONNECTED) && (status == BluetoothGatt.GATT_SUCCESS)) { intentAction = ACTION_GATT_CONNECTED; mConnectionState = STATE_CONNECTED; broadcastUpdate(intentAction); Log.i(TAG, "Connected to GATT server."); // Attempts to discover services after successful connection. boolean isFindServiceSuccess = mBluetoothGatt.discoverServices(); Log.i(TAG, "Attempting to start service discovery:" + isFindServiceSuccess); } 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) { Log.w(TAG, "mBluetoothGatt = " + mBluetoothGatt); // BluetoothGattServices = mBluetoothGatt.getServices(); // Log.e("getService", "mBluetoothGatt size = " + BluetoothGattServices.size()); enableTXNotification(); //??android N if (Build.VERSION.SDK_INT < 24) { boolean isSuccess = ensureServiceChangedEnabled(); Log.i(TAG, "ensureServiceChangedEnabled:" + isSuccess); } } else { Log.w(TAG, "onServicesDiscovered received: " + status); } } //???? @Override public void onCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) { broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic); } @Override public void onCharacteristicChanged(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic) { broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic); } }; //?? private void broadcastUpdate(final String action) { final Intent intent = new Intent(action); LocalBroadcastManager.getInstance(ICSOpenVPNApplication.getContext()).sendBroadcast(intent); } // private String dataType=""; // private String messageFromBlueTooth; //?? private void broadcastUpdate(final String action, final BluetoothGattCharacteristic characteristic) { final Intent intent = new Intent(action); if (TX_CHAR_UUID1.equals(characteristic.getUuid())) { byte[] txValue = characteristic.getValue(); int lengthData = (txValue[1] & 0x7f) + 1; int dataStatue = txValue[1] & 0x80; String messageFromBlueTooth = HexStringExchangeBytesUtil.bytesToHexString(characteristic.getValue()); Log.e("UartService", messageFromBlueTooth); if (lengthData == 1 && dataStatue == 0x80) { //TODO ?? // messages.add(messageFromBlueTooth); ArrayList<String> onePackagemessage = new ArrayList<>(); onePackagemessage.add(messageFromBlueTooth); intent.putStringArrayListExtra(EXTRA_DATA, onePackagemessage); LocalBroadcastManager.getInstance(ICSOpenVPNApplication.getContext()).sendBroadcast(intent); return; } else { //TODO ? if (TextUtils.isEmpty(messageFromBlueTooth)) { return; } if (messages == null) { messages = new ArrayList<>(); } messages.add(messageFromBlueTooth); if (messages.size() < lengthData) { if (dataStatue == 0x80) { isWholeDataPackage = true; } return; } if (isWholeDataPackage || dataStatue == 0x80) { isWholeDataPackage = false; sortMessage(); intent.putStringArrayListExtra(EXTRA_DATA, messages); Log.e("UartService", messages.toString()); LocalBroadcastManager.getInstance(ICSOpenVPNApplication.getContext()).sendBroadcast(intent); } } // intent.putExtra(EXTRA_DATA, messageFromBlueTooth); // if(messages.size()==0){ // return; // } } } private void sortMessage() { if (messages.size() > 1) { ArrayList<String> messagesList = new ArrayList<>(); int z = 0; for (int i = 0; i < messages.size(); i++) { for (int j = 0; j < messages.size(); j++) { if ((Integer.parseInt(messages.get(j).substring(2, 4), 16) & 127) == i) { z = j; break; } } messagesList.add(messages.get(z)); } messages.clear(); messages = messagesList; } } public class LocalBinder extends Binder { public UartService getService() { return UartService.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 example, 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. */ /*** * ?? * @return ??? */ 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. */ //mac? public boolean connect(String address) { if (mBluetoothAdapter == null || address == null) { Log.w(TAG, "BluetoothAdapter not initialized or unspecified address."); return false; } address = address.toUpperCase(); final BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address); if (device == null) { Log.w(TAG, "Device not found. Unable to connect."); return false; } if (mBluetoothGatt != null) { mBluetoothGatt.close(); //LogUtil.info("-------------mBluetoothGatt"); } // We want to directly connect to the device, so we are setting the autoConnect // parameter to false. mBluetoothGatt = device.connectGatt(this, false, mGattCallback); Log.d(TAG, "Trying to create a new connection."); 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(); mConnectionState = STATE_DISCONNECTED; broadcastUpdate(ACTION_GATT_DISCONNECTED); // refreshDeviceCache(); close(); } /** * 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; } Log.w(TAG, "mBluetoothGatt closed"); 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); 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); } }*/ /** * Enable TXNotification * * @return */ public void enableTXNotification() { // boolean isUpgrade = false; if (mBluetoothGatt == null) { showMessage("mBluetoothGatt null" + mBluetoothGatt); broadcastUpdate(DEVICE_DOES_NOT_SUPPORT_UART); return; } BluetoothGattService RxService; RxService = mBluetoothGatt.getService(RX_SERVICE_UUID); if (RxService == null) { showMessage("Rx service not found!"); broadcastUpdate(DEVICE_DOES_NOT_SUPPORT_UART); return; } Log.i("getService", "??" + RxService); setDescriptor(RxService, TX_CHAR_UUID1); // setDescriptor(RxService, TX_CHAR_UUID2); // setDescriptor(RxService, TX_CHAR_UUID3); } /** * When the device is bonded and has the Generic Attribute service and the Service Changed characteristic this method enables indications on this characteristic. * In case one of the requirements is not fulfilled this method returns <code>false</code>. * * @return <code>true</code> when the request has been sent, <code>false</code> when the device is not bonded, does not have the Generic Attribute service, the GA service does not have * the Service Changed characteristic or this characteristic does not have the CCCD. */ public boolean ensureServiceChangedEnabled() { final BluetoothGatt gatt = mBluetoothGatt; if (gatt == null) return false; // The Service Changed indications have sense only on bonded devices final BluetoothDevice device = gatt.getDevice(); if (device.getBondState() != BluetoothDevice.BOND_BONDED) return false; final BluetoothGattService gaService = gatt.getService(GENERIC_ATTRIBUTE_SERVICE); if (gaService == null) return false; final BluetoothGattCharacteristic scCharacteristic = gaService .getCharacteristic(SERVICE_CHANGED_CHARACTERISTIC); return scCharacteristic != null; } //?UUIDmBluetoothGatt?callback?onCharacteristicChanged()? public void setDescriptor(BluetoothGattService rxService, UUID uuid) { CommonTools.delayTime(150); BluetoothGattCharacteristic TxChar = rxService.getCharacteristic(uuid); if (TxChar == null) { showMessage("Tx charateristic not found!"); broadcastUpdate(DEVICE_DOES_NOT_SUPPORT_UART); return; } // final int rxProperties = TxChar.getProperties(); // boolean writeRequest = (rxProperties & BluetoothGattCharacteristic.PROPERTY_WRITE) > 0; // // // Set the WRITE REQUEST type when the characteristic supports it. This will allow to send long write (also if the characteristic support it). // // In case there is no WRITE REQUEST property, this manager will divide texts longer then 20 bytes into up to 20 bytes chunks. // if (writeRequest) // TxChar.setWriteType(BluetoothGattCharacteristic.WRITE_TYPE_DEFAULT); mBluetoothGatt.setCharacteristicNotification(TxChar, true); BluetoothGattDescriptor descriptor = TxChar.getDescriptor(CCCD); descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE); // mBluetoothGatt.readDescriptor(descriptor); mBluetoothGatt.writeDescriptor(descriptor); //?? broadcastUpdate(FINDED_SERVICE); } /*** * ??? * @param value * @return */ public boolean writeRXCharacteristic(byte[] value) { try { //mBluetoothGatt????? if (mBluetoothGatt == null) { Log.e("Blue_Chanl", "????"); mConnectionState = STATE_DISCONNECTED; broadcastUpdate(ACTION_GATT_DISCONNECTED); return false; } BluetoothGattService RxService = null; //?? if (RxService == null) { //"6E400001-B5A3-F393-E0A9-E50E24DCCA9E" RxService = mBluetoothGatt.getService(RX_SERVICE_UUID); } showMessage("mBluetoothGatt null" + mBluetoothGatt); if (RxService == null) { showMessage("Rx service not found!"); broadcastUpdate(DEVICE_DOES_NOT_SUPPORT_UART); return false; } //??? BluetoothGattCharacteristic RxChar = null; if (RxChar == null) { //"6E400002-B5A3-F393-E0A9-E50E24DCCA9E" RxChar = RxService.getCharacteristic(RX_CHAR_UUID); } if (RxChar == null) { showMessage("Rx charateristic not found!"); broadcastUpdate(DEVICE_DOES_NOT_SUPPORT_UART); return false; } //??? RxChar.setValue(value); Log.d(TAG, "writeRXCharacteristic: " + value); //? boolean status = mBluetoothGatt.writeCharacteristic(RxChar); Log.e("Blue_Chanl", "write TXchar - status=" + status); if (!status) { try { Thread.sleep(500); status = mBluetoothGatt.writeCharacteristic(RxChar); Log.e("Blue_Chanl", "??write TXchar - status=" + status); } catch (InterruptedException e) { e.printStackTrace(); } } } catch (NullPointerException e) { e.printStackTrace(); } return true; } private void showMessage(String msg) { Log.e(TAG, msg); } /** * 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 boolean isOpenBlueTooth() { if (mBluetoothAdapter != null) { if (mBluetoothAdapter.isEnabled()) { return true; } } return false; } public boolean isConnecttingBlueTooth() { return mConnectionState == STATE_CONNECTING; } public boolean isConnectedBlueTooth() { return mConnectionState == STATE_CONNECTED; } /** * * Clears the internal cache and forces a refresh of the services from the * * remote device. */ public void refreshDeviceCache() { //? mBluetoothAdapter.disable(); //? mBluetoothAdapter.enable(); } }