我正在开发一个Android应用程序。这就是我所拥有的。
public class DeviceControlActivity extends AppCompatActivity {
public static final String EXTRAS_DEVICE_NAME = "DEVICE_NAME";
public static final String EXTRAS_DEVICE_ADDRESS = "DEVICE_ADDRESS";
private final static String TAG = DeviceControlActivity.class.getSimpleName();
public static DeviceControlActivity deviceControlActivity = null;
public TextView mConnectionState;
private TextView mDataField;
private String mDeviceName;
private String mDeviceAddress;
private ExpandableListView mGattServicesList;
private BluetoothLeService mBluetoothLeService;
// Code to manage Service lifecycle.
private final ServiceConnection mServiceConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName componentName, IBinder service) {
mBluetoothLeService = ((BluetoothLeService.LocalBinder) service).getService();
if (!mBluetoothLeService.initialize()) {
Log.e(TAG, "Unable to initialize Bluetooth");
finish();
}
// Automatically connects to the device upon successful start-up initialization.
mBluetoothLeService.connect(mDeviceAddress);
}
@Override
public void onServiceDisconnected(ComponentName componentName) {
mBluetoothLeService = null;
}
};
private ArrayList<ArrayList<BluetoothGattCharacteristic>> mGattCharacteristics =
new ArrayList<ArrayList<BluetoothGattCharacteristic>>();
private boolean mConnected = false;
// Handles various events fired by the Service.
// ACTION_GATT_CONNECTED: connected to a GATT server.
// ACTION_GATT_DISCONNECTED: disconnected from a GATT server.
// ACTION_GATT_SERVICES_DISCOVERED: discovered GATT services.
// ACTION_DATA_AVAILABLE: received data from the device. This can be a result of read
// or notification operations.
private final BroadcastReceiver mGattUpdateReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
final String action = intent.getAction();
Log.i(TAG, "IN BROADCASTRECEIVER");
Log.d(TAG, action);
if (BluetoothLeService.ACTION_GATT_CONNECTED.equals(action)) {
Log.d(TAG, "ACTION_GATT_CONNECTED");
mConnected = true;
updateConnectionState(R.string.connected);
invalidateOptionsMenu();
} else if (BluetoothLeService.ACTION_GATT_DISCONNECTED.equals(action)) {
Log.d(TAG, "ACTION_GATT_DISCONNECTED");
mConnected = false;
updateConnectionState(R.string.disconnected);
invalidateOptionsMenu();
clearUI();
} else if (!"android.bluetooth.device.action.FOUND".equals(action)) {
Log.d(TAG, "android.bluetooth.device.action.FOUND");
if (!"android.bluetooth.adapter.action.DISCOVERY_FINISHED".equals(action)) {
Log.d(TAG, "android.bluetooth.device.action.DISCOVERY_FINISHED " + action);
Log.d(TAG, "BluetoothLeService.ACTION_DATA_AVAILABLE.equals(action): " + BluetoothLeService.ACTION_DATA_AVAILABLE.equals(action));
if (BluetoothLeService.ACTION_DATA_AVAILABLE.equals(action)) {
Log.d(TAG, "ACTION_DATA_AVAILABLE");
String result = intent.getStringExtra(BluetoothLeService.EXTRA_DATA);
if (result != null) {
System.out.println(result);
}
} else if (BluetoothLeService.ACTION_GATT_HM_RX_TX.equals(action)) {
Log.d(TAG, "ACTION_GATT_HM_RX_TX");
Toast.makeText(DeviceControlActivity.this, "Serial port aval", Toast.LENGTH_SHORT).show();
}
}
} else {
Log.e(TAG, "error: " + action);
}
}
};
private BluetoothGattCharacteristic mNotifyCharacteristic;
// If a given GATT characteristic is selected, check for supported features. This sample
// demonstrates 'Read' and 'Notify' features. See
// http://d.android.com/reference/android/bluetooth/BluetoothGatt.html for the complete
// list of supported characteristic features.
private final ExpandableListView.OnChildClickListener servicesListClickListner =
new ExpandableListView.OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView parent, View v, int groupPosition,
int childPosition, long id) {
Log.d("readCharacteristic", "INSIDE");
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;
}
Log.d("readCharacteristic", "READ");
mBluetoothLeService.readCharacteristic(characteristic);
}
if ((charaProp | BluetoothGattCharacteristic.PROPERTY_NOTIFY) > 0) {
mNotifyCharacteristic = characteristic;
mBluetoothLeService.setCharacteristicNotification(
characteristic, true);
}
return true;
}
return false;
}
};
private static IntentFilter makeGattUpdateIntentFilter() {
final IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(BluetoothLeService.ACTION_GATT_CONNECTED);
intentFilter.addAction(BluetoothLeService.ACTION_GATT_DISCONNECTED);
intentFilter.addAction(BluetoothLeService.ACTION_GATT_SERVICES_DISCOVERED);
intentFilter.addAction(BluetoothLeService.ACTION_DATA_AVAILABLE);
intentFilter.addAction(BluetoothLeService.ACTION_GATT_HM_RX_TX);
intentFilter.addAction("android.bluetooth.device.action.ACL_CONNECTED");
intentFilter.addAction("android.bluetooth.device.action.ACL_DISCONNECT_REQUESTED");
intentFilter.addAction("android.bluetooth.device.action.ACL_DISCONNECTED");
intentFilter.addAction(BluetoothLeService.ACTION_GATT_IS_SERVICE_AVAILABLE);
return intentFilter;
}
private void clearUI() {
mGattServicesList.setAdapter((SimpleExpandableListAdapter) null);
mDataField.setText(R.string.no_data);
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.gatt_services_characteristics);
Log.i(TAG, "onCreate");
final Intent intent = getIntent();
mDeviceName = intent.getStringExtra(EXTRAS_DEVICE_NAME);
mDeviceAddress = intent.getStringExtra(EXTRAS_DEVICE_ADDRESS);
// Sets up UI references.
((TextView) findViewById(R.id.device_address)).setText(mDeviceAddress);
mGattServicesList = (ExpandableListView) findViewById(R.id.gatt_services_list);
mGattServicesList.setOnChildClickListener(servicesListClickListner);
mConnectionState = (TextView) findViewById(R.id.connection_state);
mDataField = (TextView) findViewById(R.id.data_value);
Intent gattServiceIntent = new Intent(this, BluetoothLeService.class);
bindService(gattServiceIntent, mServiceConnection, BIND_AUTO_CREATE);
}
@Override
protected void onResume() {
super.onResume();
Log.i(TAG, "onResume");
deviceControlActivity = this;
registerReceiver(mGattUpdateReceiver, makeGattUpdateIntentFilter());
if (mBluetoothLeService != null) {
final boolean result = mBluetoothLeService.connect(mDeviceAddress);
Log.d(TAG, "Connect request result=" + result);
}
}
@Override
protected void onPause() {
super.onPause();
Log.d(TAG, "onPause");
unregisterReceiver(mGattUpdateReceiver);
deviceControlActivity = null;
}
@Override
protected void onDestroy() {
super.onDestroy();
unbindService(mServiceConnection);
mBluetoothLeService.close();
mBluetoothLeService = null;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.gatt_services, menu);
if (mConnected) {
menu.findItem(R.id.menu_connect).setVisible(false);
menu.findItem(R.id.menu_disconnect).setVisible(true);
} else {
menu.findItem(R.id.menu_connect).setVisible(true);
menu.findItem(R.id.menu_disconnect).setVisible(false);
}
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_connect:
mBluetoothLeService.connect(mDeviceAddress);
return true;
case R.id.menu_disconnect:
mBluetoothLeService.disconnect();
return true;
case android.R.id.home:
onBackPressed();
return true;
}
return super.onOptionsItemSelected(item);
}
private void updateConnectionState(final int resourceId) {
runOnUiThread(new Runnable() {
@Override
public void run() {
mConnectionState.setText(resourceId);
}
});
}
}
在BluetoothLeService中，我有：
public static final String ACTION_GATT_HM_RX_TX = "com.example.bluetooth.le.ACTION_GATT_HM_RX_TX";
public static final String ACTION_GATT_CONNECTED = "com.example.bluetooth.le.ACTION_GATT_CONNECTED";
public static final String ACTION_GATT_DISCONNECTED = "com.example.bluetooth.le.ACTION_GATT_DISCONNECTED";
public static final String ACTION_GATT_SERVICES_DISCOVERED = "com.example.bluetooth.le.ACTION_GATT_SERVICES_DISCOVERED";
public static final String ACTION_DATA_AVAILABLE = "com.example.bluetooth.le.ACTION_DATA_AVAILABLE";
public static final String EXTRA_DATA = "com.example.bluetooth.le.EXTRA_DATA";
public static final String ACTION_GATT_IS_SERVICE_AVAILABLE = "com.example.bluetooth.le.ACTION_GATT_SERVICE_AVAILABLE";
当我的具有API 4.4.4的S3手机正常工作但我的带有API 4.4.2的平板电脑Galaxy Tab 4和带有5.0的S5手机无法正常工作时出现问题。 BroadcastReceiver与S3配合良好，并在BLE设备发送数据时接收数据。对于其他设备，BroadcastReceiver仅在连接到BLE（ACTION_GATT_CONNECTED）时触发一次，但之后没有任何内容。当它与BLE（ACTION_GATT_DISCONNECTED）断开连接时，它会触发另一个。甚至没有Log.i(TAG, "IN BROADCASTRECEIVER");被召唤。 BLE设备是HM-10组件。
答案 0 :(得分：0)
我解决了这个问题。问题是我的BluetoothLeCallback没有正确实现。一旦我重新实现了i，它现在适用于18岁及以上的所有Android版本。
干杯。