AndroidThings蓝牙问题处理

叁歲伎倆 2022-05-26 05:08 155阅读 0赞

Android things系统中并没有提供setting application，所以所有的蓝牙处理需要我们自行维护，故如果我们需要使用蓝牙连接必须使用Android 自己去做扫描，配对，连接整个过程

比如：

蓝牙配对

![70][]

解除配对

![70 1][]

以及设置pin，连接等，都需要调用大量的反射，在这里我给大家推荐的方法是：

使用things sdk中存在的BluetoothConnectionManager类，通过查阅文档得知，google为了做things上的蓝牙适配，特此对外公布了此接口

### **蓝牙配对示例：** ###

import android.bluetooth.BluetoothDevice;
    import com.google.android.things.bluetooth.BluetoothConnectionManager;
    import com.google.android.things.bluetooth.BluetoothPairingCallback;
    import com.google.android.things.bluetooth.PairingParams;
    ...
    
    public class PairingActivity extends Activity {
    
        BluetoothConnectionManager mBluetoothConnectionManager;
    
        @Override
        protected void onCreate(Bundled savedInstanceState) {
            super.onCreate(savedInstanceState);
            mBluetoothConnectionManager = BluetoothConnectionManager.getInstance();
            mBluetoothConnectionManager.registerPairingCallback(mBluetoothPairingCallback);
        }
    
        @Override
        protected void onDestroy() {
            super.onDestroy();
            mBluetoothConnectionManager.unregisterPairingCallback(mBluetoothPairingCallback);
        }
    
        private void startPairing(BluetoothDevice remoteDevice) {
            mBluetoothConnectionManager.initiatePairing(remoteDevice);
        }
    
        private BluetoothPairingCallback mBluetoothPairingCallback = new BluetoothPairingCallback() {
    
            @Override
            public void onPairingInitiated(BluetoothDevice bluetoothDevice,
                    PairingParams pairingParams) {
                // Handle incoming pairing request or confirmation of outgoing pairing request
                handlePairingRequest(bluetoothDevice, pairingParams);
            }
    
            @Override
            public void onPaired(BluetoothDevice bluetoothDevice) {
                // Device pairing complete
            }
    
            @Override
            public void onUnpaired(BluetoothDevice bluetoothDevice) {
                // Device unpaired
            }
    
            @Override
            public void onPairingError(BluetoothDevice bluetoothDevice,
                    BluetoothPairingCallback.PairingError pairingError) {
                // Something went wrong!
            }
        };
    }

### 蓝牙连接示例: ###

import android.bluetooth.BluetoothDevice;
    import com.google.android.things.bluetooth.BluetoothConnectionManager;
    import com.google.android.things.bluetooth.BluetoothConnectionCallback;
    import com.google.android.things.bluetooth.BluetoothProfile;
    import com.google.android.things.bluetooth.ConnectionParams;
    ...
    
    public class ConnectActivity extends Activity {
    
        BluetoothConnectionManager mBluetoothConnectionManager;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            mBluetoothConnectionManager = BluetoothConnectionManager.getInstance();
            mBluetoothConnectionManager.registerConnectionCallback(mBluetoothConnectionCallback);
        }
    
        @Override
        protected void onDestroy() {
            super.onDestroy();
            mBluetoothConnectionManager.unregisterConnectionCallback(mBluetoothConnectionCallback);
        }
    
        private void connectToA2dp(BluetoothDevice bluetoothDevice) {
            mBluetoothConnectionManager.connect(bluetoothDevice, BluetoothProfile.A2DP_SINK);
        }
    
        // Set up callbacks for the profile connection process.
        private final BluetoothConnectionCallback mBluetoothConnectionCallback = new BluetoothConnectionCallback() {
            @Override
            public void onConnectionRequested(BluetoothDevice bluetoothDevice, ConnectionParams connectionParams) {
                // Handle incoming connection request
                handleConnectionRequest();
            }
    
            @Override
            public void onConnectionRequestCancelled(BluetoothDevice bluetoothDevice, int requestType) {
                // Request cancelled
            }
    
            @Override
            public void onConnected(BluetoothDevice bluetoothDevice, int profile) {
                // Connection completed successfully
            }
    
            @Override
            public void onDisconnected(BluetoothDevice bluetoothDevice, int profile) {
                // Remote device disconnected
            }
        };
    }

官方文档请查阅

https://developer.android.google.cn/things/sdk/apis/bluetooth.html

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注意：NXP Pico i.MX7D请务必插上天线再进行调试

[70]: /images/20220526/e49364672e0f4eb881397e50934c9bf2.png
[70 1]: /images/20220526/6bc0c515b20d44a4b15b66c19f67b646.png