android_蓝牙模块的开发

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这里写图片描述

android代码实现手机和蓝牙板块之间的通讯

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context=".MainActivity" >    <Button        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:onClick="scan"        android:text="扫描蓝牙设备" />    <Button        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:onClick="stop"        android:text="停止蓝牙扫描" />    <Button        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:onClick="switchLight"        android:text="开关电灯" />    <LinearLayout        android:id="@+id/ll_bluetooth"        android:orientation="vertical"        android:layout_width="match_parent"        android:layout_height="match_parent" >    </LinearLayout></LinearLayout>

public class MainActivity extends Activity {    BluetoothAdapter mBluetoothAdapter;    BluetoothReceiver mBluetoothReceiver;    LinearLayout mLl_bluetooth;    OutputStream os;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();        mLl_bluetooth = (LinearLayout) findViewById(R.id.ll_bluetooth);        mBluetoothAdapter.enable();        IntentFilter filter = new IntentFilter();        // 开始扫描的广播        filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_STARTED);        // 扫描完成的广播        filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);        // 发现一个可用的设备的广播        filter.addAction(BluetoothDevice.ACTION_FOUND);        mBluetoothReceiver = new BluetoothReceiver();        // 注册监听        registerReceiver(mBluetoothReceiver, filter);    }    private class BluetoothReceiver extends BroadcastReceiver {        @Override        public void onReceive(Context context, Intent intent) {            String action = intent.getAction();            if (BluetoothAdapter.ACTION_DISCOVERY_STARTED.equals(action)) {                Toast.makeText(MainActivity.this, "开始扫描蓝牙设备", 0).show();            } else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED                    .equals(action)) {                Toast.makeText(MainActivity.this, "扫描蓝牙设备完成", 0).show();            } else if (BluetoothDevice.ACTION_FOUND.equals(action)) {                Toast.makeText(MainActivity.this, "发现了蓝牙设备", 0).show();                final BluetoothDevice device = intent                        .getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);                // 打印出附近的蓝牙设备                System.out.println(device.getName() + "\n"                        + device.getAddress());                TextView tv = new TextView(MainActivity.this);                tv.setText(device.getName() + "----" + device.getAddress());                tv.setTextSize(25);                tv.setTag(device);// 把textView和一个对象绑定起来                tv.setOnClickListener(new OnClickListener() {                    @Override                    public void onClick(View v) {                        BluetoothSocket socket;                        try {                            //                            // 这个是接受一个UUID,                            // 但是在蓝牙2.0的时候,UUID不重要.就写这个这么一个特殊的UUID就可以了                            // 在蓝牙4.0的时候,UUID就重要了                            socket = device.createRfcommSocketToServiceRecord(UUID                                    .fromString("00001000-0000-1000-8000-00805F9B34FB}"));                            // 连接指令                            socket.connect();                            os = socket.getOutputStream();                        } catch (IOException e) {                            // TODO Auto-generated catch block                            e.printStackTrace();                        }                    }                });                mLl_bluetooth.addView(tv);            }        }    }    @Override    protected void onDestroy() {        unregisterReceiver(mBluetoothReceiver);        mBluetoothReceiver = null;    }    public void switchLight(View v) {// 开关电灯        try {            os.write(0xA1);            os.write(0xF1);            os.flush();        } catch (IOException e) {            e.printStackTrace();        }    }    public void scan(View v) {        // 扫面发现蓝牙设备        mBluetoothAdapter.startDiscovery();    }}

需要的权限

<uses-permission android:name="android.permission.BLUETOOTH"/><uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>

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