本文介绍了工作与BLE的Android 4.3怎么写的特点？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在使用的是Android 4.3的API一个BLE项目（Android应用程序），我用的样品BLE的应用程序是只读特性DeviceControlActivity.activity，但我想写的特点，并将其发送到BLE芯片上单击按钮。我怎么能写在芯片CC2540数据..基本上我不知道一步程序步骤写特性。
写，我只能看到设备的名称和id与下面这段code在DeviceControlActivity
私人最终ExpandableListView.OnChildClickListener servicesListClickListner =
新ExpandableListView.OnChildClickListener（）{
@覆盖
公共布尔onChildClick（ExpandableListView父，视图V，INT groupPosition，
INT childPosition，长ID）{
如果（mGattCharacteristics！= NULL）{
最后BluetoothGattCharacteristic特征=
mGattCharacteristics.get（groupPosition）获得（childPosition）;
最终诠释charaProp = characteristic.getProperties（）;
如果（（charaProp | BluetoothGattCharacteristic.PROPERTY_READ）大于0）{
//如果有一个活动的通知上的特性，明确
//它首先因此它不更新用户接口上的数据字段。
如果（mNotifyCharacteristic！= NULL）{
mBluetoothLeService.setCharacteristicNotification（
mNotifyCharacteristic，假）;
mNotifyCharacteristic = NULL;
}
mBluetoothLeService.readCharacteristic（特性）;
的ShowDialog（读书）;
}
如果（（charaProp | BluetoothGattCharacteristic.PROPERTY_WRITE）大于0）{
//如果有一个活动的通知上的特性，明确
//它首先因此它不更新用户接口上的数据字段。
如果（mNotifyCharacteristic！= NULL）{
mBluetoothLeService.setCharacteristicNotification（
mNotifyCharacteristic，假）;
mNotifyCharacteristic = NULL;
}
mBluetoothLeService.writeCharacteristic（特性）;
的ShowDialog（写）;
//characteristic.setValue(bytes）;
//characteristic.setValue("testing）;
//characteristic.setWriteType(BluetoothGattCharacteristic.PERMISSION_WRITE）;
}
如果（（charaProp | BluetoothGattCharacteristic.PROPERTY_NOTIFY）大于0）{
mNotifyCharacteristic =特性;
mBluetoothLeService.setCharacteristicNotification（
特性，真）;
}
byte []的值= {0×00，（字节）（0xB9）值，0X0D，（字节）（0×90），值为0x2F};
如果（！characteristic.setValue（值））
{
Log.w（TAG，无法设置特色的本地值）;
//返回;
}
characteristic.setWriteType（BluetoothGattCharacteristic.WRITE_TYPE_NO_RESPONSE）;
/*if(!writeCharacteristic.writeCharacteristic(characteristic））
{
Log.w（TAG，无法写入特性）;
} * /
返回true;
}
返回false;
}
};
解决方案
以下code是写特性使用字节[] 数据：
公共布尔writeCharacteristic（）{
//检查mBluetoothGatt可用
如果（mBluetoothGatt == NULL）{
Log.e（TAG，失去联系）;
返回false;
}
BluetoothGattService服务= mBluetoothGatt.getService（您服务）;
如果（服务== NULL）{
Log.e（TAG的服务没有找到！）;
返回false;
}
BluetoothGattCharacteristic charac =服务
.getCharacteristic（你的特性）;
如果（charac == NULL）{
Log.e（TAG，CHAR没有找到！）;
返回false;
}
byte []的值=新的字节[1];
值[0] =（字节）（21安培;为0xFF）;
charac.setValue（值）;
布尔值状态= mBluetoothGatt.writeCharacteristic（charac）;
返回状态;
}
I am working on a BLE project (Android application) using Android 4.3 API, i have used sample BLE app it is only reading characteristics in DeviceControlActivity.activity, but i want to write characteristics and send it to BLE chip on clicking a button. How can I write data on chip cc2540 .. Basically i don't know the step by step procedure to write characteristics.
write i can only see the name and id of device with following piece of code in DeviceControlActivity
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);
showDialog("reading");
}
if ((charaProp | BluetoothGattCharacteristic.PROPERTY_WRITE) > 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.writeCharacteristic(characteristic);
showDialog("writing");
//characteristic.setValue(bytes);
//characteristic.setValue("testing");
//characteristic.setWriteType(BluetoothGattCharacteristic.PERMISSION_WRITE);
}
if ((charaProp | BluetoothGattCharacteristic.PROPERTY_NOTIFY) > 0) {
mNotifyCharacteristic = characteristic;
mBluetoothLeService.setCharacteristicNotification(
characteristic, true);
}
byte[] value = {0x00, (byte) (0xB9) , 0x0D, (byte) (0x90), 0x2F};
if(!characteristic.setValue(value))
{
Log.w(TAG, "Couldn't set characteristic's local value");
//return;
}
characteristic.setWriteType(BluetoothGattCharacteristic.WRITE_TYPE_NO_RESPONSE);
/*if(!writeCharacteristic.writeCharacteristic(characteristic))
{
Log.w(TAG, "Couldn't write characteristic");
}*/
return true;
}
return false;
}
};
解决方案
The following code is write characteristic using byte[] data:
public boolean writeCharacteristic(){
//check mBluetoothGatt is available
if (mBluetoothGatt == null) {
Log.e(TAG, "lost connection");
return false;
}
BluetoothGattService Service = mBluetoothGatt.getService(your Services);
if (Service == null) {
Log.e(TAG, "service not found!");
return false;
}
BluetoothGattCharacteristic charac = Service
.getCharacteristic(your characteristic);
if (charac == null) {
Log.e(TAG, "char not found!");
return false;
}
byte[] value = new byte[1];
value[0] = (byte) (21 & 0xFF);
charac.setValue(value);
boolean status = mBluetoothGatt.writeCharacteristic(charac);
return status;
}
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