如何更新为BLE每5秒在Android的电池电量 [英] how to update the battery level for every 5seconds in ble in android
问题描述
在下面的代码我得到的一些电池电量percentage.but我要打电话通知，好让每5到10秒就更新battery.so的百分比，请帮助me.the以下是我的设备控制活动在此我codeD如下：
私人最终的BroadcastReceiver mGattUpdateReceiver =新的BroadcastReceiver（）{
@覆盖
公共无效的onReceive（上下文的背景下，意图意图）{
最后弦乐行动= intent.getAction（）;
如果（BluetoothLeService.ACTION_DATA_AVAILABLE.equals（动作））{
displayData（intent.getStringExtra（BluetoothLeService.EXTRA_DATA））;
}
}
};
和在下面的方法我设置电池值和图像显示中的值中的百分比
私人无效displayData（字符串数据）{
Log.v（______________________没有serives _______________，数据）;
如果（数据！= NULL）{
mBluetoothLeService.setCharacteristicNotification（mNotifyCharacteristic，真正的）;
battery.setText（数据）;
INT X =的Integer.parseInt（battery.getText（）的toString（））;
。image_level.getLayoutParams（）高度= X * 2;
}
否则，如果（数据== NULL）
battery.setText（数据）;
}
和下面是我BLE服务，在此我添加一组通知方法WH ICH如下：
公共无效setCharacteristicNotification（BluetoothGattCharacteristic特点，
布尔启用）{
如果（mBluetoothAdapter == NULL || mBluetoothGatt == NULL）{
Log.w（TAG，BluetoothAdapter未初始化）;
返回;
}
mBluetoothGatt.setCharacteristicNotification（特点，启用）;
//对于立方体写
如果（UUID_BatteryService.equals（characteristic.getUuid（）））{
BluetoothGattDescriptor描述符= characteristic.getDescriptor（
UUID.fromString（SampleGattAttributes.CLIENT_CHARACTERISTIC_CONFIG））;
descriptor.setValue（BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE）;
mBluetoothGatt.writeDescriptor（描述）;
}
}
公共无效onCharacteristicChanged（BluetoothGatt关贸总协定
BluetoothGattCharacteristic特性）{
broadcastUpdate（ACTION_DATA_AVAILABLE，特点）;
}
};
公共布尔writeCharacteristic（BluetoothGattCharacteristic我）{
//检查mBluetoothGatt可用
如果（mBluetoothGatt == NULL）{
Log.e（TAG，失去联系）;
返回false;
}
BluetoothGattService服务= mBluetoothGatt.getService（UUID_BatteryService）;
如果（服务== NULL）{
Log.e（TAG的服务没有找到！）;
//////////没有服务发现...........
返回false;
}
布尔值状态= mBluetoothGatt.writeCharacteristic（我）;
Log.e（TAG，蓝牙写入的状态，+状态）;
返回状态;
}
私人无效broadcastUpdate（最后的字符串操作）{
最终意向意图=新的意图（动作）;
sendBroadcast（意向）;
}
私人无效broadcastUpdate（最后的字符串操作，
最后BluetoothGattCharacteristic特性）{
最终意向意图=新的意图（动作）;
如果（SampleGattAttributes.CLIENT_CHARACTERISTIC_CONFIG_BATTERY。
的toString（）。
equalsIgnoreCase（characteristic.getUuid（）的toString（）））{
Log.v（_____________，在broadcastupdate ..........）;
最后一个字节[]数据= characteristic.getValue（）;
如果（数据= NULL和放大器;！＆安培; data.length＆GT; 0）{
最后StringBuilder的StringBuilder的=新的StringBuilder（data.length）;
对于（字节byteChar：数据）
stringBuilder.append（的String.Format（％02X，byteChar））;
最终诠释标志= characteristic.getProperties（）;
INT格式= -1;
如果（（标志＆安培;！为0x01）= 0）{
格式= BluetoothGattCharacteristic.FORMAT_UINT16;
Log.d（TAG，格式UINT16。）;
} 其他 {
格式= BluetoothGattCharacteristic.FORMAT_UINT8;
Log.d（TAG，UINT8。）;
}
INT batterylevel = characteristic.getIntValue（格式，0）;
intent.putExtra（EXTRA_DATA，将String.valueOf（batterylevel））;
//intent.putExtra(EXTRA_DATA,new字符串（数据））;
}
}
sendBroadcast（意向）;
}
如果我很好理解你的问题，你需要以定期检查你的电池电量定时器。
例如，你可以开始你的设备控制活动后使用code，也许在onServiceConnected方法的末尾：
请把计时器在onServiceConnected（）mServiceConnection对象的方法
的结束 定时器定时=新的定时器（batteryTimer）;
TimerTask的任务=新的TimerTask（）{
@覆盖
公共无效的run（）{
mBluetoothLeService.getBattery（）;
}
};
timer.scheduleAtFixedRate（任务，0，5000）;
不要忘记调用timer.cancel（）时，活动结束。
和在服务上，你可以把这样的事情：
公共无效getBattery（）{
如果（mBluetoothGatt == NULL）{
Log.e（TAG，失去联系）;
}
BluetoothGattService batteryService = mBluetoothGatt.getService（Battery_Service_UUID）;
如果（batteryService == NULL）{
Log.d（TAG，电池服务未找到！）;
返回;
}
BluetoothGattCharacteristic batteryLevel = batteryService.getCharacteristic（Battery_Level_UUID）;
如果（batteryLevel == NULL）{
Log.d（TAG，电池电量没有找到！）;
返回;
}
mBluetoothGatt.readCharacteristic（batteryLevel）;
}
这是这将需要修改的一个例子，但是，让你如何做到这一点的想法。
有人已经做了访问下面的链接电池值： <一href="http://stackoverflow.com/questions/19539535/how-to-get-the-battery-level-after-connect-to-the-ble-device">How拿到电池后级连接BLE设备？
in the following coding i am getting battery level of some percentage.but i want to call notify characteristics so that for every 5 to 10 secs it updates the percentage of battery.so please help me.the following is my device control activity,in this i coded as follows.
private final BroadcastReceiver mGattUpdateReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
final String action = intent.getAction();
if (BluetoothLeService.ACTION_DATA_AVAILABLE.equals(action)) {
displayData(intent.getStringExtra(BluetoothLeService.EXTRA_DATA));
}
}
};
and in the following method i am setting battery value and displaying in the value in percentage on image.
private void displayData(String data) {
Log.v("______________________No serives_______________",data );
if (data != null) {
mBluetoothLeService.setCharacteristicNotification(mNotifyCharacteristic, true);
battery.setText(data);
int x=Integer.parseInt(battery.getText().toString());
image_level.getLayoutParams().height = x*2;
}
else if (data==null)
battery.setText(data);
}
and the following is my ble service in this i add the set notification method wh ich is as follows.
public void setCharacteristicNotification(BluetoothGattCharacteristic characteristic,
boolean enabled) {
if (mBluetoothAdapter == null || mBluetoothGatt == null) {
Log.w(TAG, "BluetoothAdapter not initialized");
return;
}
mBluetoothGatt.setCharacteristicNotification(characteristic, enabled);
//For cube write
if (UUID_BatteryService.equals(characteristic.getUuid())) {
BluetoothGattDescriptor descriptor = characteristic.getDescriptor(
UUID.fromString(SampleGattAttributes.CLIENT_CHARACTERISTIC_CONFIG));
descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
mBluetoothGatt.writeDescriptor(descriptor);
}
}
public void onCharacteristicChanged(BluetoothGatt gatt,
BluetoothGattCharacteristic characteristic) {
broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);
}
};
public boolean writeCharacteristic(BluetoothGattCharacteristic i){
//check mBluetoothGatt is available
if (mBluetoothGatt == null) {
Log.e(TAG, "lost connection");
return false;
}
BluetoothGattService Service = mBluetoothGatt.getService(UUID_BatteryService);
if (Service == null) {
Log.e(TAG, "service not found!");
//////////NO service found...........
return false;
}
boolean status = mBluetoothGatt.writeCharacteristic(i);
Log.e(TAG, "bluetooth write status"+status);
return status;
}
private void broadcastUpdate(final String action) {
final Intent intent = new Intent(action);
sendBroadcast(intent);
}
private void broadcastUpdate(final String action,
final BluetoothGattCharacteristic characteristic) {
final Intent intent = new Intent(action);
if(SampleGattAttributes.CLIENT_CHARACTERISTIC_CONFIG_BATTERY.
toString().
equalsIgnoreCase(characteristic.getUuid().toString())) {
Log.v("_____________","in broadcastupdate..........");
final byte[] data = characteristic.getValue();
if (data != null && data.length > 0) {
final StringBuilder stringBuilder = new StringBuilder(data.length);
for(byte byteChar : data)
stringBuilder.append(String.format("%02X ", byteChar));
final int flag = characteristic.getProperties();
int format = -1;
if ((flag & 0x01) != 0) {
format = BluetoothGattCharacteristic.FORMAT_UINT16;
Log.d(TAG, " format UINT16.");
} else {
format = BluetoothGattCharacteristic.FORMAT_UINT8;
Log.d(TAG, " UINT8.");
}
int batterylevel = characteristic.getIntValue(format, 0);
intent.putExtra(EXTRA_DATA, String.valueOf(batterylevel));
//intent.putExtra(EXTRA_DATA,new String(data));
}
}
sendBroadcast(intent);
}
If I well understood your question, you will need a Timer in order to check you battery level regularly.
For instance, you could use this code after starting your device control activity, maybe at the end of the onServiceConnected method :
please put the timer at the end of onServiceConnected() method of mServiceConnection object
Timer timer = new Timer("batteryTimer");
TimerTask task = new TimerTask() {
@Override
public void run() {
mBluetoothLeService.getBattery();
}
};
timer.scheduleAtFixedRate(task, 0, 5000);
And do not forget to call timer.cancel() when the activity is finishing.
And in the service, you could put something like that :
public void getBattery() {
if (mBluetoothGatt == null) {
Log.e(TAG, "lost connection");
}
BluetoothGattService batteryService = mBluetoothGatt.getService(Battery_Service_UUID);
if(batteryService == null) {
Log.d(TAG, "Battery service not found!");
return;
}
BluetoothGattCharacteristic batteryLevel = batteryService.getCharacteristic(Battery_Level_UUID);
if(batteryLevel == null) {
Log.d(TAG, "Battery level not found!");
return;
}
mBluetoothGatt.readCharacteristic(batteryLevel);
}
It is an example which would need to be modified but that gives you an idea on how to do it.
Somebody already did access to the battery value in the link below : How to get the battery level after connect to the BLE device?
这篇关于如何更新为BLE每5秒在Android的电池电量的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
