/* * 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 com.example.bluetooth.le;import android.app.Activity;import android.bluetooth.BluetoothGattCharacteristic;import android.bluetooth.BluetoothGattService;import android.content.BroadcastReceiver;import android.content.ComponentName;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.content.ServiceConnection;import android.os.Bundle;import android.os.IBinder;import android.util.Log;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.widget.ExpandableListView;import android.widget.SimpleExpandableListAdapter;import android.widget.TextView;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import com.example.bluetooth.le.R;/** * For a given BLE device, this Activity provides the user interface to connect, display data, * and display GATT services and characteristics supported by the device. The Activity * communicates with {@code BluetoothLeService}, which in turn interacts with the * Bluetooth LE API. */public class DeviceControlActivity extends Activity { private final static String TAG = DeviceControlActivity.class.getSimpleName(); public static final String EXTRAS_DEVICE_NAME = "DEVICE_NAME"; public static final String EXTRAS_DEVICE_ADDRESS = "DEVICE_ADDRESS"; private TextView mConnectionState; private TextView mDataField; private String mDeviceName; private String mDeviceAddress; private ExpandableListView mGattServicesList; private BluetoothLeService mBluetoothLeService; private ArrayList<ArrayList<BluetoothGattCharacteristic>> mGattCharacteristics = new ArrayList<ArrayList<BluetoothGattCharacteristic>>(); private boolean mConnected = false; private BluetoothGattCharacteristic mNotifyCharacteristic; private final String LIST_NAME = "NAME"; private final String LIST_UUID = "UUID"; // Code to manage Service lifecycle. private final ServiceConnection mServiceConnection = new ServiceConnection() { @Override public void onServiceConnected(ComponentName componentName, IBinder service) { mBluetoothLeService = ((BluetoothLeService.LocalBinder) service).getService(); if (!mBluetoothLeService.initialize()) { Log.e(TAG, "Unable to initialize Bluetooth"); finish(); } // Automatically connects to the device upon successful start-up initialization. mBluetoothLeService.connect(mDeviceAddress); } @Override public void onServiceDisconnected(ComponentName componentName) { mBluetoothLeService = null; } }; // Handles various events fired by the Service. // ACTION_GATT_CONNECTED: connected to a GATT server. // ACTION_GATT_DISCONNECTED: disconnected from a GATT server. // ACTION_GATT_SERVICES_DISCOVERED: discovered GATT services. // ACTION_DATA_AVAILABLE: received data from the device. This can be a result of read // or notification operations. private final BroadcastReceiver mGattUpdateReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { final String action = intent.getAction(); if (BluetoothLeService.ACTION_GATT_CONNECTED.equals(action)) { mConnected = true; updateConnectionState(R.string.connected); invalidateOptionsMenu(); } else if (BluetoothLeService.ACTION_GATT_DISCONNECTED.equals(action)) { mConnected = false; updateConnectionState(R.string.disconnected); invalidateOptionsMenu(); clearUI(); } else if (BluetoothLeService.ACTION_GATT_SERVICES_DISCOVERED.equals(action)) { // Show all the supported services and characteristics on the user interface. displayGattServices(mBluetoothLeService.getSupportedGattServices()); } else if (BluetoothLeService.ACTION_DATA_AVAILABLE.equals(action)) { displayData(intent.getStringExtra(BluetoothLeService.EXTRA_DATA)); } } }; // If a given GATT characteristic is selected, check for supported features. This sample // demonstrates 'Read' and 'Notify' features. See // http://d.android.com/reference/android/bluetooth/BluetoothGatt.html for the complete // list of supported characteristic features. private final ExpandableListView.OnChildClickListener servicesListClickListner = new ExpandableListView.OnChildClickListener() { @Override public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) { if (mGattCharacteristics != null) { final BluetoothGattCharacteristic characteristic = mGattCharacteristics.get(groupPosition).get(childPosition); final int charaProp = characteristic.getProperties(); if ((charaProp | BluetoothGattCharacteristic.PROPERTY_READ) > 0) { // If there is an active notification on a characteristic, clear // it first so it doesn't update the data field on the user interface. if (mNotifyCharacteristic != null) { mBluetoothLeService.setCharacteristicNotification( mNotifyCharacteristic, false); mNotifyCharacteristic = null; } mBluetoothLeService.readCharacteristic(characteristic); } if ((charaProp | BluetoothGattCharacteristic.PROPERTY_NOTIFY) > 0) { mNotifyCharacteristic = characteristic; mBluetoothLeService.setCharacteristicNotification( characteristic, true); } return true; } return false; } }; private void clearUI() { mGattServicesList.setAdapter((SimpleExpandableListAdapter) null); mDataField.setText(R.string.no_data); } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.gatt_services_characteristics); final Intent intent = getIntent(); mDeviceName = intent.getStringExtra(EXTRAS_DEVICE_NAME); mDeviceAddress = intent.getStringExtra(EXTRAS_DEVICE_ADDRESS); // Sets up UI references. ((TextView) findViewById(R.id.device_address)).setText(mDeviceAddress); mGattServicesList = (ExpandableListView) findViewById(R.id.gatt_services_list); mGattServicesList.setOnChildClickListener(servicesListClickListner); mConnectionState = (TextView) findViewById(R.id.connection_state); mDataField = (TextView) findViewById(R.id.data_value); getActionBar().setTitle(mDeviceName); getActionBar().setDisplayHomeAsUpEnabled(true); Intent gattServiceIntent = new Intent(this, BluetoothLeService.class); bindService(gattServiceIntent, mServiceConnection, BIND_AUTO_CREATE); } @Override protected void onResume() { super.onResume(); registerReceiver(mGattUpdateReceiver, makeGattUpdateIntentFilter()); if (mBluetoothLeService != null) { final boolean result = mBluetoothLeService.connect(mDeviceAddress); Log.d(TAG, "Connect request result=" result); } } @Override protected void onPause() { super.onPause(); unregisterReceiver(mGattUpdateReceiver); } @Override protected void onDestroy() { super.onDestroy(); unbindService(mServiceConnection); mBluetoothLeService = null; } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.gatt_services, menu); if (mConnected) { menu.findItem(R.id.menu_connect).setVisible(false); menu.findItem(R.id.menu_disconnect).setVisible(true); } else { menu.findItem(R.id.menu_connect).setVisible(true); menu.findItem(R.id.menu_disconnect).setVisible(false); } return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch(item.getItemId()) { case R.id.menu_connect: mBluetoothLeService.connect(mDeviceAddress); return true; case R.id.menu_disconnect: mBluetoothLeService.disconnect(); return true; case android.R.id.home: onBackPressed(); return true; } return super.onOptionsItemSelected(item); } private void updateConnectionState(final int resourceId) { runOnUiThread(new Runnable() { @Override public void run() { mConnectionState.setText(resourceId); } }); } private void displayData(String data) { if (data != null) { mDataField.setText(data); } } // Demonstrates how to iterate through the supported GATT Services/Characteristics. // In this sample, we populate the data structure that is bound to the ExpandableListView // on the UI. private void displayGattServices(List<BluetoothGattService> gattServices) { if (gattServices == null) return; String uuid = null; String unknownServiceString = getResources().getString(R.string.unknown_service); String unknownCharaString = getResources().getString(R.string.unknown_characteristic); ArrayList<HashMap<String, String>> gattServiceData = new ArrayList<HashMap<String, String>>(); ArrayList<ArrayList<HashMap<String, String>>> gattCharacteristicData = new ArrayList<ArrayList<HashMap<String, String>>>(); mGattCharacteristics = new ArrayList<ArrayList<BluetoothGattCharacteristic>>(); // Loops through available GATT Services. for (BluetoothGattService gattService : gattServices) { HashMap<String, String> currentServiceData = new HashMap<String, String>(); uuid = gattService.getUuid().toString(); currentServiceData.put( LIST_NAME, SampleGattAttributes.lookup(uuid, unknownServiceString)); currentServiceData.put(LIST_UUID, uuid); gattServiceData.add(currentServiceData); ArrayList<HashMap<String, String>> gattCharacteristicGroupData = new ArrayList<HashMap<String, String>>(); List<BluetoothGattCharacteristic> gattCharacteristics = gattService.getCharacteristics(); ArrayList<BluetoothGattCharacteristic> charas = new ArrayList<BluetoothGattCharacteristic>(); // Loops through available Characteristics. for (BluetoothGattCharacteristic gattCharacteristic : gattCharacteristics) { charas.add(gattCharacteristic); HashMap<String, String> currentCharaData = new HashMap<String, String>(); uuid = gattCharacteristic.getUuid().toString(); currentCharaData.put( LIST_NAME, SampleGattAttributes.lookup(uuid, unknownCharaString)); currentCharaData.put(LIST_UUID, uuid); gattCharacteristicGroupData.add(currentCharaData); } mGattCharacteristics.add(charas); gattCharacteristicData.add(gattCharacteristicGroupData); } SimpleExpandableListAdapter gattServiceAdapter = new SimpleExpandableListAdapter( this, gattServiceData, android.R.layout.simple_expandable_list_item_2, new String[] {LIST_NAME, LIST_UUID}, new int[] { android.R.id.text1, android.R.id.text2 }, gattCharacteristicData, android.R.layout.simple_expandable_list_item_2, new String[] {LIST_NAME, LIST_UUID}, new int[] { android.R.id.text1, android.R.id.text2 } ); mGattServicesList.setAdapter(gattServiceAdapter); } private static IntentFilter makeGattUpdateIntentFilter() { final IntentFilter intentFilter = new IntentFilter(); intentFilter.addAction(BluetoothLeService.ACTION_GATT_CONNECTED); intentFilter.addAction(BluetoothLeService.ACTION_GATT_DISCONNECTED); intentFilter.addAction(BluetoothLeService.ACTION_GATT_SERVICES_DISCOVERED); intentFilter.addAction(BluetoothLeService.ACTION_DATA_AVAILABLE); return intentFilter; }}
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