IOS/Android 读取蓝牙设备电量信息

使用系统API扫描到蓝牙设备：
IOS使用到的framework 1.CoreBluetooth/CoreBluetooth.h
Android使用到的framework 1.android.bluetooth.BluetoothAdapter 2.android.bluetooth.BluetoothDevice 3.android.bluetooth.BluetoothManager

蓝牙默认广播中是不会带有电量信息的，但是可以通过定制蓝牙硬件的方式，手动添加额外信息ServiceData，然后使用IOS/Android原生的API扫描蓝牙广播数据，并根据自己定义的协议对其进行解析便可得到蓝牙电量信息。
IOS 代码示例

- ( void )centralManager:( CBCentralManager *)central didDiscoverPeripheral:( CBPeripheral *)peripheral advertisementData:( NSDictionary < NSString *, id > *)advertisementData RSSI:( NSNumber *)RSSI {
    NSArray *keys = [advertisementData allKeys ];
    for ( int i = 0 ; i < [keys count ]; ++i) {
        id key = [keys objectAtIndex : i];
        NSString *keyName = ( NSString *) key;
        NSObject *value = [advertisementData objectForKey : key];
        if ([value isKindOfClass : [ NSArray class ]]) {
            printf ( "key01: %s\n" , [keyName cStringUsingEncoding : NSUTF8StringEncoding ]);
            NSArray *values = ( NSArray *) value;
            for ( int j = 0 ; j < [values count ]; ++j) {
                if ([[values objectAtIndex : j] isKindOfClass : [ CBUUID class ]]) {
                    CBUUID *uuid = [values objectAtIndex : j];
                    NSData *data = uuid. data ;
                    printf ( "UUID(%d):" , j);
                    for ( int j = 0 ; j < data. length ; ++j)
                        printf ( " %2X" , (( UInt8 *) data. bytes )[j]);
                    printf ( "\n" );
                } else {
                    const char *valueString = [[value description ] cStringUsingEncoding : NSUTF8StringEncoding ];
                    printf ( "      value(%d): %s\n" , j, valueString);
                }
            }
        } else {
            const char *valueString = [[value description ] cStringUsingEncoding : NSUTF8StringEncoding ];

            if ([keyName isEqualToString : @"kCBAdvDataServiceData" ]) {
                NSString *string = [ NSString stringWithUTF8String :valueString];
                [ self checkAndAddNewDevice :string];
            }
            NSLog ( @" key02: %s, value: %@\n" , [keyName cStringUsingEncoding : NSUTF8StringEncoding ], [ NSString stringWithUTF8String :valueString]);
        }
    } } // 解析广播包
- ( void )checkAndAddNewDevice:( NSString *)serverData {
    void (^CallBack)() = ^(){
        if ( self . delegate && [ self . delegate respondsToSelector : @selector (updateDataSources:)]) {
            [ self . delegate updateDataSources : _bleArray ];
        }
        self . status = ( self . bleArray && self . bleArray . count > 0 ) ? BLEStatus_Gotit : BLEStatus_NoDevices ;
        if ( self . delegate && [ self . delegate respondsToSelector : @selector (didScannerStatusChanged:)]) {
            [ self . delegate didScannerStatusChanged : _status ];
        }
    };
    BLEModel *newModel = [ self bluetoothServerDataAnalyzer :serverData];
    BOOL exist = false ;
    if (! newModel) return ;
    if (! _bleArray ) _bleArray = [ NSMutableArray new ];
    for ( BLEModel *model in _bleArray ) {
        if ([model. b_mac isEqualToString :newModel. b_mac ])
            exist = true ;
    }
    if (!exist) {
        [ _bleArray addObject :newModel];
        CallBack();;
    }
}

- ( BLEModel *)bluetoothServerDataAnalyzer:( NSString *)serverData {
    BLEModel *model = nil ;
    if (!serverData) {
        return nil ;
    }
    if ([serverData containsString : @" = " ] && [serverData containsString : @"<" ] && [serverData containsString : @">" ]) {
        NSArray *array = [serverData componentsSeparatedByString : @" = " ];
        if (array. count == 2 ) {
            NSString *data = array[ 1 ];
            data = [data stringByTrimmingCharactersInSet :[ NSCharacterSet whitespaceAndNewlineCharacterSet ]];
            data = [data stringByReplacingOccurrencesOfString : @" " withString : @"" ];
            if (data. length == 21 ) {
                NSString *body = [data substringWithRange : NSMakeRange ( 1 , data. length - 5 )];
                NSString *b_version = [body substringWithRange : NSMakeRange ( 0 , 2 )];
                NSString *b_bettery = [body substringWithRange : NSMakeRange ( 2 , 2 )];
                NSString *b_mac     = [body substringWithRange : NSMakeRange ( 4 , body. length - 4 )];
                model = [[ BLEModel alloc ] init :b_version bettery :b_bettery mac :b_mac];
//                NSLog(@" 版本 :%@ 电量 :%@ mac:%@", model.b_version, model.b_bettery, model.b_mac);
            }
        }
    }
    return model; }

Android 代码示例

    /**
     * 扫描设备
     *
     * @param enable
     */
    private void scanLeDevice( boolean enable) {
        if (enable) {
            mHandler.postDelayed( new Runnable() {
                @Override
                public void run() {
                    // TODO Auto-generated method stub
                    mBluetoothAdapter.stopLeScan(mLeScanCallback);
                    invalidateOptionsMenu();
                }
            }, SCAN_PERIOD); // 在搜索时间内，关闭搜索标志，不对搜索回调函数进行响应
            mBluetoothAdapter.startLeScan(mLeScanCallback);
        } else {
            mBluetoothAdapter.stopLeScan(mLeScanCallback);
        }
        Logger.error(TAG, " 是否开始扫描 =" + enable);
        invalidateOptionsMenu();
    }

    // Device scan callback.
    private BluetoothAdapter.LeScanCallback mLeScanCallback = new BluetoothAdapter.LeScanCallback() {
        @Override
        public void onLeScan( final BluetoothDevice device, int rssi, byte [] scanRecord) {
            final IBeaconClass.IBeacon ibeacon = IBeaconClass.fromScanData(device, rssi, scanRecord);
            if (ibeacon == null ) return ;
            try {
                String strTemp = StringUtil.bytesToHexString(scanRecord);
                Logger.error(TAG, strTemp.length() + "= 长度，回调方法 -onLeScan()=" + strTemp); //0201061aff4c000215fda50693a4e24fb1afcfc6eb07647825000a0007c5090942523531343633310b1642523d6400cdff003ab100000000000000000000
                if (!TextUtils.isEmpty(strTemp)) {
                    String usefulData = strTemp.substring( 86 , 106 ); //4252 3d6400cdff003a9e
                    Logger.error(TAG, usefulData.length() + "= 长度，回调方法 -onLeScan() 截取有用数据 usefulData=" + usefulData);
//                String serviceID1 = usefulData.substring(2);
//                    String serviceID = usefulData.substring(2, 4);
//                    if (serviceID.equals("52")) {
                        String strVersion = usefulData.substring( 4 , 6 );
                        int intVersion = Integer.parseInt(strVersion, 16 );
                        String strPower = usefulData.substring( 6 , 8 );
                        int intPower = Integer.parseInt(strPower, 16 );
                        Logger.error(TAG, strVersion + "=strVersion 回调方法 -onLeScan() ，版本值 intVersion=" + intVersion);
                        Logger.error(TAG, strPower + "=strPower 回调方法 -onLeScan() ，电量值 intPower=" + intPower);
                        if (intPower > 0 ) {
                            ibeacon.version = intVersion;
                            ibeacon.power = intPower;
                            runOnUiThread( new Runnable() {
                                @Override
                                public void run() {
                                    adapter.addDevice(ibeacon);
                                }
                            });

                        }
//                    }
                }
            } catch (Exception e) {
                Logger.error(TAG, " 解析蓝牙数据出错 =" + e);
            }
        }     };

IOS/Android 读取蓝牙设备电量信息

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