我正在開發一個Android應用程序,每天必須連接+/- 120個BLE GATT服務器,其中至少有3個服務器同時具有完全相同的服務和特點。儘管遵循所有標準和默認模式,但我一直在體驗Android BLE的各種問題。Android BLE onCharacteristic讀取錯誤的狀態導致藍牙已停止工作
每天發生的事情是,我必須至少一次將平板電腦重置爲默認設置,因爲'藍牙已停止工作',其中找不到原因。 這是非常令人沮喪的,我無法忍受這種類型的維護每一天(硬重置)。
起初,我嘗試了Android SDK 18的BLE,其中的行爲非常奇怪,只用了一天就顯示出糟糕的結果。 所以我開始使用操縱Android BLE的棒棒糖版本,它顯示了一些改進。
我幾天來都在遇到這些問題,因爲我得到了意想不到的結果,例如onCharacteristicRead返回但數據爲空。例如,我在帶有STATE_CONNECTED的onConnectionStateChanged之後調用discoverServices(),因此在一段時間之後onServicesDiscovered()被調用但getServices()返回null。 所有這些問題只發生在從第一臺服務器斷開連接之後。它連接的第一臺服務器正確讀寫所有內容,然後斷開連接()和onConnectionStateChanged(),然後關閉()。因此,我連接到下一個服務器,並且我開始遇到這些問題(所有GATT操作都在主線程中,所有連接都正確並妥善處理),因此我必須斷開連接,以便can應用程序可以讀取GATT屬性正確。
我有3個閱讀特徵,閱讀第三個特徵後,我開始寫3個特徵。
我已經通過藍牙日誌,我可以看到意外的事情發生。該日誌,當應用程序讀取一切正常(它總是隻有第一GATT服務器的應用程序連接到):
10-11 09:08:05.350 15989-15989/efp.android.sample D/BluetoothAdapter: STATE_ON
10-11 09:08:05.350 15989-15989/efp.android.sample D/BluetoothAdapter: STATE_ON
10-11 09:08:05.350 15989-15989/efp.android.sample D/BluetoothLeScanner: Start Scan
10-11 09:08:05.351 15989-15989/efp.android.sample D/BluetoothAdapter: STATE_ON
10-11 09:08:05.352 15989-15989/efp.android.sample D/BluetoothAdapter: STATE_ON
10-11 09:08:05.353 15989-15989/efp.android.sample D/BluetoothAdapter: STATE_ON
10-11 09:08:05.354 15989-15989/efp.android.sample D/BluetoothAdapter: STATE_ON
10-11 09:08:05.362 15989-15994/efp.android.sample I/art: Do partial code cache collection, code=48KB, data=60KB
10-11 09:08:05.362 15989-15994/efp.android.sample I/art: After code cache collection, code=48KB, data=60KB
10-11 09:08:05.362 15989-15994/efp.android.sample I/art: Increasing code cache capacity to 256KB
10-11 09:08:05.457 15989-16002/efp.android.sample D/BluetoothLeScanner: onClientRegistered() - status=0 clientIf=5 mClientIf=0
10-11 09:08:05.513 15989-15989/efp.android.sample W/IInputConnectionWrapper: getCursorCapsMode on inactive InputConnection
10-11 09:08:05.681 15989-16023/efp.android.sample D/ScanRecord: parseFromBytes
10-11 09:08:05.681 15989-15989/efp.android.sample D/LAURASTAR_BLE: onScanResult
10-11 09:08:05.682 15989-15989/efp.android.sample D/BluetoothAdapter: STATE_ON
10-11 09:08:05.683 15989-15989/efp.android.sample D/BluetoothAdapter: STATE_ON
10-11 09:08:05.684 15989-15989/efp.android.sample D/BluetoothAdapter: STATE_ON
10-11 09:08:05.685 15989-15989/efp.android.sample D/BluetoothAdapter: STATE_ON
10-11 09:08:05.685 15989-15989/efp.android.sample D/BluetoothLeScanner: Stop Scan
10-11 09:08:05.692 15989-15989/efp.android.sample D/BluetoothGatt: connect() - device: F5:8E:C1:91:DC:CC, auto: false
10-11 09:08:05.692 15989-15989/efp.android.sample D/BluetoothAdapter: isSecureModeEnabled
10-11 09:08:05.699 15989-15989/efp.android.sample D/BluetoothGatt: registerApp()
10-11 09:08:05.699 15989-15989/efp.android.sample D/BluetoothGatt: registerApp() - UUID=ebf41986-8aad-4796-a537-7319c00f0f46
10-11 09:08:05.802 15989-16002/efp.android.sample D/BluetoothGatt: onClientRegistered() - status=0 clientIf=5
10-11 09:08:06.332 15989-16001/efp.android.sample D/LAURASTAR_BLE: onConnectionStateChange:
10-11 09:08:06.332 15989-16001/efp.android.sample D/BluetoothGatt: discoverServices() - device: F5:8E:C1:91:DC:CC
10-11 09:08:06.343 15989-16002/efp.android.sample D/BluetoothGatt: onSearchComplete() = Device=F5:8E:C1:91:DC:CC Status=0
10-11 09:08:06.343 15989-16002/efp.android.sample D/LAURASTAR_BLE: onServicesDiscovered:
10-11 09:08:07.143 15989-16002/efp.android.sample W/BluetoothGatt: onCharacteristicRead() - Device=F5:8E:C1:91:DC:CC handle=51 Status=0
10-11 09:08:07.233 15989-16002/efp.android.sample W/BluetoothGatt: onCharacteristicRead() - Device=F5:8E:C1:91:DC:CC handle=14 Status=0
10-11 09:08:07.324 15989-16023/efp.android.sample W/BluetoothGatt: onCharacteristicRead() - Device=F5:8E:C1:91:DC:CC handle=23 Status=0
10-11 09:08:08.136 15989-16023/efp.android.sample D/BluetoothGatt: cancelOpen() - device: F5:8E:C1:91:DC:CC
10-11 09:08:08.146 15989-16001/efp.android.sample D/BluetoothGatt: onClientConnectionState() - status=0 clientIf=5 device=F5:8E:C1:91:DC:CC
10-11 09:08:08.151 15989-16001/efp.android.sample D/LAURASTAR_BLE: onConnectionStateChange:
10-11 09:08:08.265 15989-15989/efp.android.sample D/BluetoothGatt: close()
10-11 09:08:08.266 15989-15989/efp.android.sample D/BluetoothGatt: unregisterApp() - mClientIf=5
從第一GATT服務器斷開連接到第二GATT服務器後,我必須不斷斷開並重新連接以讀取特性,儘管它總是正確讀取第一個特性。
這裏的時候閱讀與問題發生的日誌......所以,如果讀數有錯誤,我需要斷開並重新連接(即使讀重新連接後有錯誤,它會關閉,掃描並再次嘗試)。
10-12 08:03:48.133 30409-30409/efp.android.sample D/BluetoothAdapter: STATE_ON
10-12 08:03:48.133 30409-30409/efp.android.sample D/BluetoothAdapter: STATE_ON
10-12 08:03:48.134 30409-30409/efp.android.sample D/BluetoothLeScanner: Start Scan
10-12 08:03:48.134 30409-30409/efp.android.sample D/BluetoothAdapter: STATE_ON
10-12 08:03:48.137 30409-30409/efp.android.sample D/BluetoothAdapter: STATE_ON
10-12 08:03:48.260 30409-31121/efp.android.sample D/BluetoothLeScanner: onClientRegistered() - status=0 clientIf=6 mClientIf=0
10-12 08:03:48.391 30409-30422/efp.android.sample D/ScanRecord: parseFromBytes
10-12 08:03:48.395 30409-30409/efp.android.sample D/LAURASTAR_BLE: onScanResult
10-12 08:03:48.397 30409-30409/efp.android.sample D/BluetoothAdapter: STATE_ON
10-12 08:03:48.397 30409-30409/efp.android.sample D/BluetoothAdapter: STATE_ON
10-12 08:03:48.398 30409-30409/efp.android.sample D/BluetoothAdapter: STATE_ON
10-12 08:03:48.399 30409-30409/efp.android.sample D/BluetoothAdapter: STATE_ON
10-12 08:03:48.399 30409-30409/efp.android.sample D/BluetoothLeScanner: Stop Scan
10-12 08:03:48.410 30409-30409/efp.android.sample D/BluetoothGatt: connect() - device: F5:8E:C1:91:DC:CC, auto: false
10-12 08:03:48.410 30409-30409/efp.android.sample D/BluetoothAdapter: isSecureModeEnabled
10-12 08:03:48.411 30409-30409/efp.android.sample D/BluetoothGatt: registerApp()
10-12 08:03:48.411 30409-30409/efp.android.sample D/BluetoothGatt: registerApp() - UUID=ce6919e5-e4f7-4180-a313-557e168a7c5a
10-12 08:03:48.514 30409-30422/efp.android.sample D/BluetoothGatt: onClientRegistered() - status=0 clientIf=6
10-12 08:03:48.745 30409-31121/efp.android.sample D/BluetoothGatt: onClientConnectionState() - status=0 clientIf=6 device=F5:8E:C1:91:DC:CC
10-12 08:03:48.755 30409-31121/efp.android.sample D/BluetoothGatt: discoverServices() - device: F5:8E:C1:91:DC:CC
10-12 08:03:48.915 30409-30414/efp.android.sample I/art: Do partial code cache collection, code=19KB, data=28KB
10-12 08:03:48.916 30409-30414/efp.android.sample I/art: After code cache collection, code=19KB, data=28KB
10-12 08:03:48.916 30409-30414/efp.android.sample I/art: Increasing code cache capacity to 128KB
10-12 08:03:48.982 30409-30422/efp.android.sample D/BluetoothGatt: onClientConnParamsChanged() - Device=F5:8E:C1:91:DC:CC interval=6 status=0 (I DONT THINK THIS SHOULD HAPPEN)
10-12 08:03:49.688 30409-30421/efp.android.sample D/BluetoothGatt: onSearchComplete() = Device=F5:8E:C1:91:DC:CC Status=0
10-12 08:03:49.689 30409-30421/efp.android.sample D/LAURASTAR_BLE: onServicesDiscovered:
10-12 08:03:49.711 30409-30422/efp.android.sample D/BluetoothGatt: onClientConnParamsChanged() - Device=F5:8E:C1:91:DC:CC interval=36 status=0
10-12 08:03:50.467 30409-31121/efp.android.sample W/BluetoothGatt: onCharacteristicRead() - Device=F5:8E:C1:91:DC:CC handle=51 Status=0
10-12 08:03:50.557 30409-30422/efp.android.sample W/BluetoothGatt: onCharacteristicRead() - Device=F5:8E:C1:91:DC:CC handle=14 Status=5 (status NOT SUCCESS ...)
10-12 08:03:50.830 30409-30422/efp.android.sample D/BluetoothGatt: onClientConnParamsChanged() - Device=F5:8E:C1:91:DC:CC interval=6 status=0
10-12 08:03:51.533 30409-31121/efp.android.sample W/BluetoothGatt: onCharacteristicRead() - Device=F5:8E:C1:91:DC:CC handle=14 Status=137 (status NOT SUCCESS ...)
10-12 08:03:51.533 30409-31121/efp.android.sample D/LAURASTAR_BLE: Data is empty. (null)
10-12 08:03:51.533 30409-31121/efp.android.sample D/BluetoothGatt: cancelOpen() - device: F5:8E:C1:91:DC:CC
10-12 08:03:51.561 30409-30422/efp.android.sample D/BluetoothGatt: onClientConnectionState() - status=0 clientIf=6 device=F5:8E:C1:91:DC:CC
10-12 08:03:51.565 30409-30422/efp.android.sample D/LAURASTAR_BLE: onConnectionStateChange:
10-12 08:03:51.565 30409-30422/efp.android.sample D/BluetoothAdapter: isSecureModeEnabled
10-12 08:03:51.609 30409-31121/efp.android.sample D/BluetoothGatt: onClientConnectionState() - status=0 clientIf=6 device=F5:8E:C1:91:DC:CC
10-12 08:03:51.610 30409-31121/efp.android.sample D/LAURASTAR_BLE: onConnectionStateChange:
10-12 08:03:51.610 30409-31121/efp.android.sample D/BluetoothGatt: discoverServices() - device: F5:8E:C1:91:DC:CC
10-12 08:04:01.091 30409-31121/efp.android.sample D/BluetoothGatt: onSearchComplete() = Device=F5:8E:C1:91:DC:CC Status=0
10-12 08:04:01.091 30409-31121/efp.android.sample D/LAURASTAR_BLE: onServicesDiscovered:
10-12 08:04:02.048 30409-31121/efp.android.sample W/BluetoothGatt: onCharacteristicRead() - Device=F5:8E:C1:91:DC:CC handle=51 Status=0
10-12 08:04:02.438 30409-30421/efp.android.sample W/BluetoothGatt: onCharacteristicRead() - Device=F5:8E:C1:91:DC:CC handle=14 Status=0
10-12 08:04:02.829 30409-30421/efp.android.sample W/BluetoothGatt: onCharacteristicRead() - Device=F5:8E:C1:91:DC:CC handle=23 Status=0
10-12 08:04:02.898 30409-30414/efp.android.sample I/art: Do partial code cache collection, code=48KB, data=61KB
10-12 08:04:02.899 30409-30414/efp.android.sample I/art: After code cache collection, code=48KB, data=61KB
10-12 08:04:02.899 30409-30414/efp.android.sample I/art: Increasing code cache capacity to 256KB
10-12 08:04:04.389 30409-30422/efp.android.sample D/BluetoothGatt: cancelOpen() - device: F5:8E:C1:91:DC:CC
10-12 08:04:04.402 30409-30421/efp.android.sample D/BluetoothGatt: onClientConnectionState() - status=0 clientIf=6 device=F5:8E:C1:91:DC:CC
10-12 08:04:04.406 30409-30421/efp.android.sample D/LAURASTAR_BLE: onConnectionStateChange:
10-12 08:04:04.502 30409-30409/efp.android.sample V/InputMethodManager: Starting input: [email protected] nm : efp.android.sample [email protected]
10-12 08:04:04.502 30409-30409/efp.android.sample I/InputMethodManager: [IMM] startInputInner - mService.startInputOrWindowGainedFocus
10-12 08:04:04.503 30409-30409/efp.android.sample D/InputTransport: Input channel constructed: fd=70
10-12 08:04:04.503 30409-30409/efp.android.sample D/InputTransport: Input channel destroyed: fd=73
10-12 08:04:04.519 30409-30409/efp.android.sample D/BluetoothGatt: close()
10-12 08:04:04.520 30409-30409/efp.android.sample D/BluetoothGatt: unregisterApp() - mClientIf=6
在此日誌,這是可見的,successfuly閱讀第一特徵後:
W/BluetoothGatt: onCharacteristicRead() - Device=F5:8E:C1:91:DC:CC handle=14 Status=5
然後onClientConnParamsChanged被discoverServices後稱爲()被調用,onServicesDiscovered前()被調用。
所有我的代碼似乎是正確的...... 因此,邏輯如下:
開始通過接收用戶所需的服務器的MAC地址,這樣應用程序可以掃描並找到它。
我有一個的EditText實現的TextWatcher,所以當用戶將MAC地址,應用程序查找具有插入地址BLE設備。
String macToFind = "";
private class ScanIronFieldsTextWatcher implements TextWatcher {
View view;
public ScanIronFieldsTextWatcher(View view) { this.view = view; }
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {}
public void afterTextChanged(Editable editable) {
switch (view.getId()) {
case R.id.txt_mac_address: {
String originalText = txtMacAddress.getText().toString().toUpperCase();
String macToFind = Tools.getValidMacAddress(originalText);
if(mConnectedGatt != null && mConnectedGatt.getDevice().getAddress().equals(macToFind)) {
mConnectedGatt.connect();
}
else {
if(mConnectedGatt != null) {
mConnectedGatt.close();
mConnectedGatt = null;
}
//Search mac address
writeToActivityLog("Looking for " + macToFind +"...", LogAdapter.MESSAGE_TYPE_NORMAL);
hideKeyboard();
startScan();
}
}
}
}
}
用戶插入mac地址後,啓動startScan()。
startScan()
private void startScan() {
if (!mBluetoothAdapter.isEnabled()) {
writeToActivityLog("Bluetooth is off!", LogAdapter.MESSAGE_TYPE_ERROR);
return;
}
try {
ScanFilter scanFilter = new ScanFilter.Builder().setDeviceAddress(macToFind).build();
ArrayList<ScanFilter> filters = new ArrayList<ScanFilter>();
filters.add(scanFilter);
ScanSettings settings = new ScanSettings.Builder().setScanMode(ScanSettings.SCAN_MODE_BALANCED).build();
mBluetoothAdapter.getBluetoothLeScanner().startScan(filters, settings, mScanCallback);
retryingHandler = new Handler();
retryingHandler.postDelayed(new Runnable() {
@Override
public void run() {
showProgress(false);
stopScan();
if (mDevices.size() == 0) {
writeToActivityLog("Server not found.", LogAdapter.MESSAGE_TYPE_ERROR);
} else {
mDevices.clear();
}
}
}, SCAN_TIME);
} catch (IllegalArgumentException e) {
writeToActivityLog("Invalid Address!", LogAdapter.MESSAGE_TYPE_ERROR);
}
}
mScanCallback:
private ScanCallback mScanCallback = new ScanCallback() {
@Override
public void onScanResult(int callbackType, ScanResult result) {
Log.d(TAG, "onScanResult");
processResult(result);
}
@Override
public void onBatchScanResults(List<ScanResult> results) {
Log.d(TAG, "onBatchScanResults: "+results.size()+" results");
for (ScanResult result : results) {
processResult(result);
}
}
@Override
public void onScanFailed(int errorCode) { Log.w(TAG, "LE Scan Failed: "+errorCode); }
private void processResult(final ScanResult result) {
runOnUiThread(new Runnable() {
@Override
public void run() {
if(mConnectedGatt == null) {
stopScan();
final BluetoothDevice device = result.getDevice();
mDevices.put(device.hashCode(), device);
writeToActivityLog("Server found!", LogAdapter.MESSAGE_TYPE_NORMAL);
writeToActivityLog("Connecting to " + macToFind + "...", LogAdapter.MESSAGE_TYPE_NORMAL);
mConnectedGatt = device.connectGatt(NewDeviceControlActivity.this, false, mGattCallback);
retryingHandler.removeCallbacksAndMessages(null);
}
}
});
}
};
mGattCallback
private BluetoothGattCallback mGattCallback = new BluetoothGattCallback() {
@Override
public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
super.onConnectionStateChange(gatt, status, newState);
if (newState == BluetoothProfile.STATE_CONNECTED) {
writeToActivityLog("Connected.", LogAdapter.MESSAGE_TYPE_SUCCESS);
mConnected = true;
if(!gatt.discoverServices()) {
writeToActivityLog("Impossible discoverServices().", LogAdapter.MESSAGE_TYPE_ERROR);
if(!retrying)
retrying = true;
mConnectedGatt.disconnect();
}
}
else if(newState == BluetoothProfile.STATE_DISCONNECTED) {
writeToActivityLog("Disconnected.", LogAdapter.MESSAGE_TYPE_NORMAL);
if(!currentIron.hasCompletedSetup()) {
showProgress(true);
if(retrying) {
writeToActivityLog("Trying again...", LogAdapter.MESSAGE_TYPE_NORMAL);
if(mConnectedGatt != null)
mConnectedGatt.connect();
}
else {
writeToActivityLog("Trying again but also scanning again... (r)", LogAdapter.MESSAGE_TYPE_NORMAL);
retrying = false;
if(mConnectedGatt != null)
mConnectedGatt.close();
mHandler.postDelayed(new Runnable() {
@Override
public void run() {
startScan();
}
}, 2000);
}
}
}
}
@Override
public void onServicesDiscovered(final BluetoothGatt gatt, int status) {
super.onServicesDiscovered(gatt, status);
Log.d(TAG, "onServicesDiscovered:");
mHandler.postDelayed(new Runnable() {
@Override
public void run() {
startObtainingIronData(gatt);
}
}, 700);
}
@Override
public void onCharacteristicRead(BluetoothGatt gatt, final BluetoothGattCharacteristic characteristic, final int status) {
super.onCharacteristicRead(gatt, characteristic, status);
byte[] data = characteristic.getValue();
if(status != BluetoothGatt.GATT_SUCCESS) {
runOnUiThread(new Runnable() { @Override public void run() {Toast.makeText(NewDeviceControlActivity.this, ("BluetoothGatt: Response != GATT_SUCCESS ("+status+")."), Toast.LENGTH_SHORT).show();}});
}
if (characteristic.getUuid().toString().contains(Iron.IRON_CODES[4])) {
//First characteristic read succesfully
final String version = new String(data);
runOnUiThread(new Runnable() { @Override public void run() {Toast.makeText(NewDeviceControlActivity.this, ("Version "+version), Toast.LENGTH_SHORT).show();}});
//Request to read second characteristic
BluetoothGattCharacteristic characteristic2 = getCharacteristic(gatt, Iron.IRON_CODES[0]);
gatt.readCharacteristic(characteristic2);
}
else if (characteristic.getUuid().toString().contains(Iron.IRON_CODES[0])) {
//Read second characteristic
if(data == null || data.length == 0) { //returns with status=137
Log.d(TAG, "Data is empty " + (data == null ? "(null)" : data));//This ALWAYS happens except the first server the app connects too
writeToActivityLog("Data is empty. "+ (data == null ? "(null)" : data), LogAdapter.MESSAGE_TYPE_ERROR);
if(!retrying)
retrying = true;
mConnectedGatt.disconnect();
return;
}
else {
if (data[2] == 4) {
//Request to read third characteristic
BluetoothGattCharacteristic characteristic2 = getCharacteristic(gatt, Iron.IRON_CODES[1]);
if(characteristic2 != null)
gatt.readCharacteristic(characteristic2);
else {
writeToActivityLog("Impossible readCharacteristic Machine Type" , LogAdapter.MESSAGE_TYPE_ERROR);
if(!retrying)
retrying = true;
mConnectedGatt.disconnect();
}
}
}
}
else if (characteristic.getUuid().toString().contains(Iron.IRON_CODES[1])) {
//Read third characteristic
if(data[0] == 0) {
BluetoothGattCharacteristic characteristic2 = getCharacteristic(gatt, Iron.IRON_CODES[2]);
long now = System.currentTimeMillis();
byte[] nowBytes = new byte[]{(byte) ((int) (now & 255L)), (byte) ((int) (now >> 8)), (byte) ((int) (now >> 16)), (byte) ((int) (now >> 24))};
characteristic2.setValue(nowBytes);
writeToActivityLog("Read all information succesfully.", LogAdapter.MESSAGE_TYPE_NORMAL);
//Request to write first characteristic
if (!gatt.writeCharacteristic(characteristic2)){
writeToActivityLog("Impossible to write timestamp.", LogAdapter.MESSAGE_TYPE_ERROR);
if(!retrying)
retrying = true;
mConnectedGatt.disconnect();
}
}
}
}
@Override
public void onCharacteristicWrite(final BluetoothGatt gatt, BluetoothGattCharacteristic characteristic2, int status) {
super.onCharacteristicWrite(gatt, characteristic2, status);
if(status == BluetoothGatt.GATT_SUCCESS) {
showProgress(false);
if(characteristic2.getUuid().toString().contains(Iron.IRON_CODES[2])) {
//Wrote first characteristic
String intToWrite = "0x01";
BluetoothGattCharacteristic characteristic = getCharacteristic(gatt, Iron.IRON_CODES[1]);
characteristic.setValue(Integer.decode(intToWrite), BluetoothGattCharacteristic.FORMAT_UINT8, 0);
//Request to write second characteristic
if (!gatt.writeCharacteristic(characteristic)) {
writeToActivityLog("Impossible to write first characteristic!.", LogAdapter.MESSAGE_TYPE_ERROR);
if(!retrying)
retrying = true;
mConnectedGatt.disconnect();
}
}
else if(characteristic2.getUuid().toString().contains(Iron.IRON_CODES[1])) {
//Wrote second characteristic
service.sendData(), new Callback<String>() {
@Override
public void onResponse(Call<String> call, Response<String> response) {
//Write third characteristic
BluetoothGattCharacteristic characteristic = getCharacteristic(gatt, Iron.IRON_CODES[3]);
characteristic.setValue(0x40, android.bluetooth.BluetoothGattCharacteristic.FORMAT_UINT8, 0);
gatt.writeCharacteristic(characteristic);
}
@Override
public void onFailure(Call<String> call, Throwable t) {
if(mConnectedGatt != null)
mConnectedGatt.disconnect();
}
});
}
}
else if(characteristic2.getUuid().toString().contains(Iron.IRON_CODES[3])) {
//Wrote third characteristic
writeToActivityLog("Data written successfully.", LogAdapter.MESSAGE_TYPE_SUCCESS);
if(mConnectedGatt != null)
mConnectedGatt.disconnect();
}
}
}
};
我有三編輯運行runOnUIThread中的所有mConnectedGatt操作,但具有相同的結果。所有特徵UUID都是正確的,並且正在寫入的特徵不是正在讀取的特徵。
我沒有GATT服務器遠離應用程序的問題,也沒有太多的問題。 我在三個三星Galaxy Tab A 10.1 2016上運行軟件,其中 都返回相同的結果。
所以我的成績基本上都是這些:
預計(只與第一服務器發生在應用程序連接到):
- 尋找MAC
- 服務器找到了!
- 連接到MAC
- 連接。
- (讀出的第一特徵)版本:
- (讀取第二特徵)
- (讀第三特徵)
- (寫第一特性)
- (寫入第二特性)
- (寫入第三特性)
- 斷開連接。
會發生什麼(試圖連接到另一臺服務器):
- 尋找MAC
- 服務器找到了!
- 連接到MAC
- 連接。
- (已讀第一個特徵)版本:
- 數據爲空! (null)
- 斷開連接。
- 再試一次...
- 連接。
- (讀出的第一特徵)版本:
- (讀取第二特徵)
- (讀第三特徵)
- (寫第一特性)
- (寫入第二特性)
- (寫入第三特性)
- 斷開連接。
而我猜很多重新連接是什麼導致'藍牙已停止工作'。 我不明白爲什麼會發生這種情況!
請,如果有人可以花一些時間來幫助我弄清楚發生了什麼,我會如此感激... 謝謝
您是否在項目中添加了一些新的ble服務?如果是可能的話,你可以嘗試清除藍牙緩存。進入設置 - >應用程序點擊右上角的更多圖標。點擊系統應用。從列表中選擇藍牙。清除存儲。 (有時它不會在第一時間清除緩存,點擊兩次到這個按鈕) 我希望它能夠解決問題 – hasbi
@hasbi你是什麼意思的新ble服務? – Firecat
我的意思是添加新的特徵 – hasbi