ble40android

❶ android4.2.2 支持 蓝牙4.0

蓝牙v4.0在2010年就推出了，但除iPhone4S,Galaxy S3, Note2支持蓝牙4.0外，Android 4.2原生系统缺乏对4.0的支持，因此4.0的BLE连接尚未大范围普及。预计低功耗蓝牙4.0会随着Android 4.3的升级得到更普遍的运用。
可参考
http://..com/link?url=gQpKOGVM4BLcFJ2L7cKT-YBEprABEw8j4aCBeIbSjB8i5APTYv_

❷ 谁能给一份开发基于蓝牙4.0的android的demo源码

请参考如下WIKI页面，基本上目前有提供的BLE的参考代码都集中到这个页面了：http://processors.wiki.ti.com/index.php/Category:BluetoothLE

❸ android蓝牙4.0接收数据长度

事实上，我们在实际连接操作中（android + ble）,不同的ble设备和不同的android设备连接过程都有不同的表现。但一般来说，连接6~7个是没有问题的

❹ android 蓝牙4.0ble的uuid怎么修改

Generic Attribute Profile (GATT)
通过BLE连接，读写属性类小数据的Profile通用规范。现在所有的BLE应用Profile都是基于GATT的。

Attribute Protocol (ATT)
GATT是基于ATT Protocol的。ATT针对BLE设备做了专门的优化，具体就是在传输过程中使用尽量少的数据。每个属性都有一个唯一的UUID，属性将以characteristics and services的形式传输。

Characteristic
Characteristic可以理解为一个数据类型，它包括一个value和0至多个对次value的描述（Descriptor）。

❺ Android 手机可以通过 BLE 被扫描到吗

本文介绍Android ble 蓝牙4.0，也就是说API level >= 18，且支持蓝牙4.0的手机才可以使用，如果手机系统版本API
level < 18，也是用不了蓝牙4.0的哦。

首先发一下官方的demo，有兴趣的可以过去看看:http://developer.android.com/guide/topics/connectivity/bluetooth-le.html。android系统4.3以上，手机支持蓝牙4.0，具有搜索，配对，连接，发现服务及特征值，断开连接等功能，下载地址：http://download.csdn.net/detail/lqw770737185/8116019。

一、了解api及概念

1.1 BluetoothGatt

继承BluetoothProfile，通过BluetoothGatt可以连接设备(connect),发现服务(discoverServices)，并把相应地属性返回到BluetoothGattCallback

1.2 BluetoothGattCharacteristic

相当于一个数据类型，它包括一个value和0~n个value的描述(BluetoothGattDescriptor)

1.3 BluetoothGattDescriptor

描述符，对Characteristic的描述，包括范围、计量单位等

1.4 BluetoothGattService

服务，Characteristic的集合。

1.5 BluetoothProfile

一个通用的规范，按照这个规范来收发数据。

1.6 BluetoothManager

通过BluetoothManager来获取BluetoothAdapter

BluetoothManager bluetoothManager = (BluetoothManager)
getSystemService(Context.BLUETOOTH_SERVICE);

1.7 BluetoothAdapter

一个Android系统只有一个BluetoothAdapter ，通过BluetoothManager 获取

BluetoothAdapter mBluetoothAdapter = bluetoothManager.getAdapter();

1.8 BluetoothGattCallback

已经连接上设备，对设备的某些操作后返回的结果。这里必须提醒下，已经连接上设备后的才可以返回，没有返回的认真看看有没有连接上设备。

private BluetoothGattCallback GattCallback = new BluetoothGattCallback()
{

// 这里有9个要实现的方法，看情况要实现那些，用到那些就实现那些

public void onConnectionStateChange(BluetoothGatt gatt, int status, int
newState){};

public void onCharacteristicWrite(BluetoothGatt gatt,
BluetoothGattCharacteristic characteristic, int status){};

};

BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);

BluetoothGatt gatt = device.connectGatt(this, false, mGattCallback);

1.8.1:notification对应onCharacteristicChanged;

gatt.setCharacteristicNotification(characteristic, true);

1.8.2:readCharacteristic对应onCharacteristicRead;

gatt.readCharacteristic(characteristic);

1.8.3: writeCharacteristic对应onCharacteristicWrite;

gatt.wirteCharacteristic(mCurrentcharacteristic);

1.8.4:连接蓝牙或者断开蓝牙 对应 onConnectionStateChange;

1.8.5: readDescriptor对应onDescriptorRead;

1.8.6:writeDescriptor对应onDescriptorWrite;

gatt.writeDescriptor(descriptor);

1.8.7:readRemoteRssi对应onReadRemoteRssi;

gatt.readRemoteRssi()

1.8.8:executeReliableWrite对应onReliableWriteCompleted;

1.8.9:discoverServices对应onServicesDiscovered。

gatt.discoverServices()

1.9 BluetoothDevice

扫描后发现可连接的设备，获取已经连接的设备

二、开启蓝牙权限如果
android.hardware.bluetooth_le设置为false,可以安装在不支持的设备上使用，判断是否支持蓝牙4.0用以下代码就可以了

if
(!getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE))
{

Toast.makeText(this, "设备不支持蓝牙4.0", Toast.LENGTH_SHORT).show();

finish();

}

三、对蓝牙的启动关闭操作

1、利用系统默认开启蓝牙对话框

if (mBluetoothAdapter == null || !mBluetoothAdapter.isEnabled()) {

Intent enableBtIntent = new
Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);

startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);

}

2、后台打开蓝牙，不做任何提示，这个也可以用来自定义打开蓝牙对话框啦

mBluetoothAdapter.enable();

3、后台关闭蓝牙

mBluetoothAdapter.disable();

四、扫描设备，连接设备，获取设备信息 ，断开连接设备，自行查看官方demo,还是看demo比较清晰啊

❻ 蓝牙40，蓝牙BLE模块，蓝牙40和蓝牙BLE的区别

一、关于蓝牙40 蓝牙40标准包含两个蓝牙标准，准确的说，是一个双模的标准，它包含传统蓝牙部分（也有称之为经典蓝牙Classic Bluetooth）和低功耗蓝牙部分（Bluetooth Low Energy）。这两个部分适用于不同的应用或者应用条件。传统蓝牙是在之蓝牙40，蓝牙BLE模块，蓝牙40和蓝牙BLE的区别

❼ android蓝牙ble4.0开发共享失败怎么办

2.1首先获取BluetoothManager

复制代码 代码如下:
BluetoothManager bluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);

2.2获取BluetoothAdapter

复制代码 代码如下:
BluetoothAdapter mBluetoothAdapter = bluetoothManager.getAdapter();

2.3创建BluetoothAdapter.LeScanCallback
private BluetoothAdapter.LeScanCallback mLeScanCallback = new BluetoothAdapter.LeScanCallback() {

@Override
public void onLeScan(final BluetoothDevice device, int rssi, final byte[] scanRecord) {

runOnUiThread(new Runnable() {
@Override
public void run() {
try {
String struuid = NumberUtils.bytes2HexString(NumberUtils.reverseBytes(scanRecord)).replace("-", "").toLowerCase();
if (device!=null && struuid.contains(DEVICE_UUID_PREFIX.toLowerCase())) {
mBluetoothDevices.add(device);
}
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
};

2.4.开始搜索设备。

复制代码 代码如下:
mBluetoothAdapter.startLeScan(mLeScanCallback);

2.5.BluetoothDevice 描述了一个蓝牙设备 提供了getAddress()设备Mac地址,getName()设备的名称。
2.6开始连接设备
/**
* 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) {
if (mBluetoothAdapter == null || address == null) {
Log.w(TAG, "BluetoothAdapter not initialized or unspecified address.");
return false;
}

// Previously connected device. Try to reconnect. (先前连接的设备。 尝试重新连接)
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 {
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 setting 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;
}

2.7连接到设备之后获取设备的服务(Service)和服务对应的Characteristic。

// 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;
ArrayList<HashMap<String, String>> gattServiceData = new ArrayList<>();
ArrayList<ArrayList<HashMap<String, String>>> gattCharacteristicData = new ArrayList<>();

mGattCharacteristics = new ArrayList<>();

// Loops through available GATT Services.
for (BluetoothGattService gattService : gattServices) {
HashMap<String, String> currentServiceData = new HashMap<>();
uuid = gattService.getUuid().toString();
if (uuid.contains("ba11f08c-5f14-0b0d-1080")) {//服务的uuid
//System.out.println("this gattService UUID is:" + gattService.getUuid().toString());
currentServiceData.put(LIST_NAME, "Service_OX100");
currentServiceData.put(LIST_UUID, uuid);
gattServiceData.add(currentServiceData);
ArrayList<HashMap<String, String>> gattCharacteristicGroupData = new ArrayList<>();
List<BluetoothGattCharacteristic> gattCharacteristics = gattService.getCharacteristics();
ArrayList<BluetoothGattCharacteristic> charas = new ArrayList<>();

// Loops through available Characteristics.
for (BluetoothGattCharacteristic gattCharacteristic : gattCharacteristics) {
charas.add(gattCharacteristic);
HashMap<String, String> currentCharaData = new HashMap<>();
uuid = gattCharacteristic.getUuid().toString();
if (uuid.toLowerCase().contains("cd01")) {
currentCharaData.put(LIST_NAME, "cd01");
} else if (uuid.toLowerCase().contains("cd02")) {
currentCharaData.put(LIST_NAME, "cd02");
} else if (uuid.toLowerCase().contains("cd03")) {
currentCharaData.put(LIST_NAME, "cd03");
} else if (uuid.toLowerCase().contains("cd04")) {
currentCharaData.put(LIST_NAME, "cd04");
} else {
currentCharaData.put(LIST_NAME, "write");
}

currentCharaData.put(LIST_UUID, uuid);
gattCharacteristicGroupData.add(currentCharaData);
}

mGattCharacteristics.add(charas);

gattCharacteristicData.add(gattCharacteristicGroupData);

mCharacteristicCD01 = gattService.getCharacteristic(UUID.fromString("0000cd01-0000-1000-8000-00805f9b34fb"));
mCharacteristicCD02 = gattService.getCharacteristic(UUID.fromString("0000cd02-0000-1000-8000-00805f9b34fb"));
mCharacteristicCD03 = gattService.getCharacteristic(UUID.fromString("0000cd03-0000-1000-8000-00805f9b34fb"));
mCharacteristicCD04 = gattService.getCharacteristic(UUID.fromString("0000cd04-0000-1000-8000-00805f9b34fb"));
mCharacteristicWrite = gattService.getCharacteristic(UUID.fromString("0000cd20-0000-1000-8000-00805f9b34fb"));

//System.out.println("=======================Set Notification==========================");
// 开始顺序监听，第一个：CD01
mBluetoothLeService.setCharacteristicNotification(mCharacteristicCD01, true);
mBluetoothLeService.setCharacteristicNotification(mCharacteristicCD02, true);
mBluetoothLeService.setCharacteristicNotification(mCharacteristicCD03, true);
mBluetoothLeService.setCharacteristicNotification(mCharacteristicCD04, true);
}
}
}

2.8获取到特征之后，找到服务中可以向下位机写指令的特征，向该特征写入指令。
public void wirteCharacteristic(BluetoothGattCharacteristic characteristic) {

if (mBluetoothAdapter == null || mBluetoothGatt == null) {
Log.w(TAG, "BluetoothAdapter not initialized");
return;
}

mBluetoothGatt.writeCharacteristic(characteristic);

}

2.9写入成功之后，开始读取设备返回来的数据。

private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() {
@Override
public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
String intentAction;
//System.out.println("=======status:" + status);
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.
Log.i(TAG, "Attempting to start service discovery:" + mBluetoothGatt.discoverServices());

} 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) {
broadcastUpdate(ACTION_GATT_SERVICES_DISCOVERED);
} else {
Log.w(TAG, "onServicesDiscovered received: " + status);
}
}
//从特征中读取数据
@Override
public void onCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) {
//System.out.println("onCharacteristicRead");
if (status == BluetoothGatt.GATT_SUCCESS) {
broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);
}
}
//向特征中写入数据
@Override
public void onCharacteristicWrite(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) {
//System.out.println("--------write success----- status:" + status);
}

/*
* when connected successfully will callback this method this method can
* dealwith send password or data analyze

*当连接成功将回调该方法
*/
@Override
public void onCharacteristicChanged(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic) {
broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);
if (characteristic.getValue() != null) {

//System.out.println(characteristic.getStringValue(0));
}
//System.out.println("--------onCharacteristicChanged-----");
}

@Override
public void onDescriptorWrite(BluetoothGatt gatt, BluetoothGattDescriptor descriptor, int status) {

//System.out.println(" = " + status + ", descriptor =" + descriptor.getUuid().toString());

UUID uuid = descriptor.getCharacteristic().getUuid();
if (uuid.equals(UUID.fromString("0000cd01-0000-1000-8000-00805f9b34fb"))) {
broadcastUpdate(ACTION_CD01NOTIDIED);
} else if (uuid.equals(UUID.fromString("0000cd02-0000-1000-8000-00805f9b34fb"))) {
broadcastUpdate(ACTION_CD02NOTIDIED);
} else if (uuid.equals(UUID.fromString("0000cd03-0000-1000-8000-00805f9b34fb"))) {
broadcastUpdate(ACTION_CD03NOTIDIED);
} else if (uuid.equals(UUID.fromString("0000cd04-0000-1000-8000-00805f9b34fb"))) {
broadcastUpdate(ACTION_CD04NOTIDIED);
}
}

@Override
public void onReadRemoteRssi(BluetoothGatt gatt, int rssi, int status) {
//System.out.println("rssi = " + rssi);
}
};

----------------------------------------------
//从特征中读取数据
@Override
public void onCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) {
//System.out.println("onCharacteristicRead");
if (status == BluetoothGatt.GATT_SUCCESS) {
broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);
}
}