AndroidStudio蓝牙通信

文章目录

一、功能需求
二、页面布局设置
- 1. 中间列表list_item.xml布局
- 2. activity_main.xml
三、页面跳转控制（java文件）
- 1. MainActivity.java
- 2. ConnectThread连接线程
- 3. openBluetooth蓝牙开启函数
- 4. BlueToothAdapter.java适配器
四、运行界面展示
五、源码

一、功能需求

进行蓝牙通信的简要设计与开发

二、页面布局设置

1. 中间列表list_item.xml布局

创建layout文件top.xml中，添加文本框，添加文字，设置为居中，修改文字颜色和LinearLayout背景颜色。

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="horizontal" android:layout_width="match_parent"android:layout_height="wrap_content"android:minHeight="50dp"android:padding="8dp"><TextViewandroid:layout_width="wrap_content"android:layout_height="match_parent"android:id="@+id/blue_name"android:gravity="center_vertical"android:textColor="#000000"/><TextViewandroid:layout_width="match_parent"android:layout_height="match_parent"android:id="@+id/blue_info"android:gravity="center_vertical|right"android:textColor="#000000"/></LinearLayout>

2. activity_main.xml

我想要的效果是页面最上方开启蓝牙，中间显示可连接设备，最下方用于接收消息和发送消息。可以一排两个内容设置一个LinearLayout，其中分别是bottom和text，用来展示信息。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"android:background="@drawable/photo"android:padding="20dp"><LinearLayoutandroid:layout_width="wrap_content"android:layout_height="wrap_content"><Buttonandroid:id="@+id/btn_openBT"android:layout_width="wrap_content"android:layout_height="wrap_content"android:backgroundTint="@color/colorPrimaryDark"android:text="设置在线"/><TextViewandroid:id="@+id/text_state2"android:layout_marginLeft="40dp"android:layout_width="wrap_content"android:layout_height="wrap_content"android:textColor="@color/black"android:text="蓝牙已经打开"/></LinearLayout><LinearLayoutandroid:layout_width="wrap_content"android:layout_height="wrap_content"><Buttonandroid:layout_marginTop="10dp"android:id="@+id/btn_search"android:layout_width="wrap_content"android:layout_height="wrap_content"android:backgroundTint="@color/colorPrimaryDark"android:text="我的好友"/><TextViewandroid:layout_marginTop="10dp"android:id="@+id/text_state"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginLeft="40dp"android:textColor="@color/black"/></LinearLayout><ListViewandroid:layout_marginTop="10dp"android:id="@+id/listView"android:layout_width="match_parent"android:layout_height="400dp"android:textColor="@color/white"/><LinearLayoutandroid:layout_width="wrap_content"android:layout_height="wrap_content"><Buttonandroid:layout_marginTop="10dp"android:id="@+id/btn_receive"android:layout_width="wrap_content"android:layout_height="wrap_content"android:backgroundTint="@color/colorPrimaryDark"android:text="来信"/><TextViewandroid:id="@+id/text_msg"android:layout_marginTop="10dp"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginLeft="20dp"android:textColor="@color/black"android:textColorHint="@color/white"android:text="请你发送消息"/></LinearLayout><LinearLayoutandroid:layout_width="wrap_content"android:layout_height="wrap_content"><Buttonandroid:layout_marginTop="10dp"android:id="@+id/btn_send"android:layout_width="wrap_content"android:layout_height="wrap_content"android:backgroundTint="@color/colorPrimaryDark"android:text="发送"/><EditTextandroid:id="@+id/text_Edit"android:layout_width="match_parent"android:layout_height="match_parent"android:layout_marginLeft="20dp"android:hint="现在发送的信息是我来选择的"android:textColor="@color/black"android:textColorHint="@color/black"android:textSize="14dp" /></LinearLayout></LinearLayout>

三、页面跳转控制（java文件）

1. MainActivity.java

public class MainActivity extends AppCompatActivity implements View.OnClickListener {private BluetoothAdapter bTAdatper;private ListView listView;private BlueToothAdapter adapter;private TextView text_state;private TextView text_msg;private final int BUFFER_SIZE = 1024;private static final String NAME = "BT_DEMO";private ConnectThread connectThread;private ListenerThread listenerThread;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);initView();bTAdatper = BluetoothAdapter.getDefaultAdapter();initReceiver();listenerThread = new ListenerThread();listenerThread.start();}private void initView() {findViewById(R.id.btn_openBT).setOnClickListener(this);findViewById(R.id.btn_search).setOnClickListener(this);findViewById(R.id.btn_send).setOnClickListener(this);text_state = (TextView) findViewById(R.id.text_state);text_msg = (TextView) findViewById(R.id.text_msg);listView = (ListView) findViewById(R.id.listView);adapter = new BlueToothDeviceAdapter(getApplicationContext(), R.layout.bluetooth_device_list_item);listView.setAdapter(adapter);listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> parent, View view, int position, long id) {if (bTAdatper.isDiscovering()) {bTAdatper.cancelDiscovery();}BluetoothDevice device = (BluetoothDevice) adapter.getItem(position);connectDevice(device);}});}private void initReceiver() {//注册广播IntentFilter filter = new IntentFilter();filter.addAction(BluetoothDevice.ACTION_FOUND);filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_STARTED);filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);registerReceiver(mReceiver, filter);}@Overridepublic void onClick(View v) {switch (v.getId()) {case R.id.btn_openBT:openBlueTooth();break;case R.id.btn_search:searchDevices();break;case R.id.btn_send:if (connectThread != null) {connectThread.sendMsg("这是蓝牙发送过来的消息");}break;}}@Overrideprotected void onDestroy() {super.onDestroy();if (bTAdatper != null && bTAdatper.isDiscovering()) {bTAdatper.cancelDiscovery();}unregisterReceiver(mReceiver);}private final BroadcastReceiver mReceiver = new BroadcastReceiver() {@Overridepublic void onReceive(Context context, Intent intent) {String action = intent.getAction();if (BluetoothDevice.ACTION_FOUND.equals(action)) {BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);if (device.getBondState() != BluetoothDevice.BOND_BONDED) {adapter.add(device);adapter.notifyDataSetChanged();}} else if (BluetoothAdapter.ACTION_DISCOVERY_STARTED.equals(action)) {Toast.makeText(MainActivity.this, "开始搜索", Toast.LENGTH_SHORT).show();} else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {Toast.makeText(MainActivity.this, "搜索完毕", Toast.LENGTH_SHORT).show();}}};public void sendMsg(final String msg) {byte[] bytes = msg.getBytes();if (outputStream != null) {try {//发送数据outputStream.write(bytes);text_msg.post(new Runnable() {@Overridepublic void run() {text_msg.setText(getResources().getString(R.string.send_msgs)+msg);}});} catch (IOException e) {e.printStackTrace();text_msg.post(new Runnable() {@Overridepublic void run() {text_msg.setText(getResources().getString(R.string.send_msg_error)+msg);}});}}}}

2. ConnectThread连接线程

连接线程，专门用来对外发出连接对方蓝牙的请求和处理流程。构造函数里通过 BluetoothDevice.createRfcommSocketToServiceRecord() ，从待连接的 device 产生BluetoothSocket. 然后在 run 方法中 connect ，成功后调用BluetoothChatSevice 的connected() 方法。定义 cancel() 在关闭线程时能够关闭相关socket 。

private class ConnectThread extends Thread {private final BluetoothSocket mmSocket;private final BluetoothDevice mmDevice;public ConnectThread(BluetoothDevice device) {mmDevice = device;BluetoothSocket tmp = null;try {tmp = device.createRfcommSocketToServiceRecord(MY_UUID);} catch (IOException e) {e.printStackTrace();}mmSocket = tmp;}@Overridepublic void run() {setName("ConnectThread");mAdapter.cancelDiscovery();try {mmSocket.connect();} catch (IOException e) {connectionFailed();try {mmSocket.close();} catch (IOException e2) {e.printStackTrace();}ChatService.this.start();return;}synchronized (ChatService.this) {mConnectThread = null;}connected(mmSocket, mmDevice);}public void cancel() {try {mmSocket.close();} catch (IOException e) {e.printStackTrace();}}}

3. openBluetooth蓝牙开启函数

private void openBluetooth() {if (bTAdatper == null) {Toast.makeText(this, Toast.LENGTH_SHORT).show();}if (!bTAdatper.isEnabled()) {     bTAdatper.enable();}if (bTAdatper.getScanMode() != BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE) {Intent i = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);i.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 0);startActivity(i);}}private void searchDevices() {if (bTAdatper.isDiscovering()) {bTAdatper.cancelDiscovery();}getBoundedDevices();bTAdatper.startDiscovery();}

4. BlueToothAdapter.java适配器

public class BlueToothAdapter extends ArrayAdapter<BluetoothDevice> {private final LayoutInflater mInflater;private int mResource;public BlueToothDeviceAdapter(Context context, int resource) {super(context, resource);mInflater = LayoutInflater.from(context);mResource = resource;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {if (convertView == null) {convertView = mInflater.inflate(mResource, parent, false);}TextView name = (TextView) convertView.findViewById(R.id.device_name);TextView info = (TextView) convertView.findViewById(R.id.device_info);BluetoothDevice device = getItem(position);name.setText(device.getName());info.setText(device.getAddress());return convertView;}
}

四、运行界面展示

五、源码

代码仓库:https://github.com/zhouyuqi1014/bluetooth

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