一、Discoverydevice.java
java
public class Discoverydevice extends AppCompatActivity {
private DeviceAdapter mAdapter2;
private final List<DeviceClass> mbondDeviceList = new ArrayList<>();//搜索到的所有已绑定设备保存为列表
private final List<DeviceClass> mfindDeviceList = new ArrayList<>();//搜索到的所有未绑定设备保存为列表
private final BluetoothController mbluetoothController = new BluetoothController();
private Toast mToast;
private Button button;
private BluetoothAdapter bluetoothAdapter;
@SuppressLint("MissingPermission")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_discoverydevice);
bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
/* View rootView = findViewById(android.R.id.content);
开始扫描蓝牙设备
View updatedView = findDevice(rootView);
*/
button = findViewById(R.id.button1);
button.setOnClickListener(v -> {
init_Filter();//初始化广播并打开
Init_listView();//初始化设备列表
findDevice(v);
});
ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main), (v, insets) -> {
Insets systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars());
v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom);
return insets;
});
}
//初始化蓝牙权限
private void Init_Bluetooth() {
mbluetoothController.enableVisibily(this);//让其他蓝牙看得到我
mbluetoothController.turnOnBlueTooth(this, 0);//打开蓝牙
}
//初始化列表，适配器的加载
public void Init_listView() {
mAdapter2 = new DeviceAdapter(Discoverydevice.this, R.layout.device_item, mfindDeviceList);
ListView listView2 = findViewById(R.id.listview2);
listView2.setAdapter(mAdapter2);
mAdapter2.notifyDataSetChanged();
listView2.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@SuppressLint("MissingPermission")
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
DeviceClass device = mfindDeviceList.get(position); // 获取点击的设备信息
String deviceAddress = device.getbAdress();
String deviceName= device.getbName();
Intent resultIntent = new Intent( );
resultIntent.putExtra("bluetoothName", deviceName);
resultIntent.putExtra("bluetoothAddress", deviceAddress);
// 设置结果代码为 RESULT_OK，表示连接成功
setResult(Discoverydevice.RESULT_OK, resultIntent);
// 关闭当前活动
finish();
showToast("连接中...");
}
});
Init_Bluetooth();
}
//开启广播
private void init_Filter() {
IntentFilter filter = new IntentFilter();
filter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED); //连接蓝牙，断开蓝牙
//开始查找
filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_STARTED);
//结束查找
filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
//查找设备 蓝牙发现新设备(未配对的设备)
filter.addAction(BluetoothDevice.ACTION_FOUND);
//设备扫描模式改变
filter.addAction(BluetoothAdapter.ACTION_SCAN_MODE_CHANGED);
//绑定状态 设备配对状态改变
filter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
filter.addAction(BluetoothDevice.ACTION_PAIRING_REQUEST);//在系统弹出配对框之前(确认/输入配对码)
filter.addAction(BluetoothDevice.ACTION_ACL_CONNECTED);//最底层连接建立
filter.addAction(BluetoothDevice.ACTION_ACL_DISCONNECTED);//最底层连接断开
filter.addAction(BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED); //BluetoothAdapter连接状态
filter.addAction(BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED); //BluetoothHeadset连接状态
filter.addAction(BluetoothA2dp.ACTION_CONNECTION_STATE_CHANGED); //BluetoothA2dp连接状态
registerReceiver(receiver, filter);
}
//广播内容
private final BroadcastReceiver receiver = new BroadcastReceiver() {
@SuppressLint("MissingPermission")
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
//开始查找
if (BluetoothAdapter.ACTION_DISCOVERY_STARTED.equals(action)) {
change_Button_Text("搜索中...", "DISABLE");
// showToast("搜索中..." );
mfindDeviceList.clear();
mAdapter2.notifyDataSetChanged(); //刷新列表适配器，将内容显示出来
// }
}
//结束查找
else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
// showToast("搜索设备..." );
change_Button_Text("扫描设备", "ENABLE");
}
//查找设备
else if (BluetoothDevice.ACTION_FOUND.equals(action)) {
change_Button_Text("搜索中...", "DISABLE");
// showToast("搜索中..." );
if (device != null && device.getName() != null && !device.getName().isEmpty()) {
change_Button_Text("搜索中...", "DISABLE");
// showToast("搜索中...");
//查找到一个设备且设备名不为空就添加到列表类中
mfindDeviceList.add(new DeviceClass(device.getName(), device.getAddress()));
mAdapter2.notifyDataSetChanged(); //刷新列表适配器，将内容显示出来
show_bondDevice();
}
}
//设备扫描模式改变
else if (BluetoothAdapter.ACTION_SCAN_MODE_CHANGED.equals(action)) {
int scanMode = intent.getIntExtra(BluetoothAdapter.EXTRA_SCAN_MODE, 0);
if (scanMode == BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE) {
showToast("true");
} else {
showToast("false");
}
} else if (BluetoothDevice.ACTION_BOND_STATE_CHANGED.equals(action)) {
BluetoothDevice remoteDevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
if (remoteDevice == null) {
return;
}
int status = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE, 0);
if (status == BluetoothDevice.BOND_BONDED) {
showToast("已绑定---" + remoteDevice.getName());
} else if (status == BluetoothDevice.BOND_BONDING) {
showToast("正在绑定---" + remoteDevice.getName());
} else if (status == BluetoothDevice.BOND_NONE) {
showToast("未绑定---" + remoteDevice.getName());
}
}
}
};
//点击开始查找蓝牙设备
public void findDevice(View view) {
mbluetoothController.findDevice();
}
// 判断是否连接 显示已连接设备信息
private void show_bondDevice() {
bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
BluetoothProfile.ServiceListener profileListener = new BluetoothProfile.ServiceListener() {
@SuppressLint("MissingPermission")
@Override
public void onServiceConnected(int profile, BluetoothProfile proxy) {
if (profile == BluetoothProfile.A2DP) {
List<BluetoothDevice> devices = proxy.getConnectedDevices();
if (!devices.isEmpty()) {
BluetoothDevice connectedDevice = devices.get(0);
mbondDeviceList.clear();
mbondDeviceList.add(new DeviceClass(connectedDevice.getName(), connectedDevice.getAddress()));
// button.setText(text);
} else {
// 展示已经配对的蓝牙设备
show_bondDeviceList();
}
}
}
@Override
public void onServiceDisconnected(int profile) {
// 展示已经配对的蓝牙设备
show_bondDeviceList();
}
};
bluetoothAdapter.getProfileProxy(Discoverydevice.this, profileListener, BluetoothProfile.A2DP);
}
// 未连接
@SuppressLint("MissingPermission")
private void show_bondDeviceList() {
mbondDeviceList.clear();
}
//点击按键搜索后按键的变化
private void change_Button_Text(String text, String state) {
if ("ENABLE".equals(state)) {
button.setEnabled(true);
button.getBackground().setAlpha(255); //0~255 之间任意调整
button.setTextColor(ContextCompat.getColor(this, R.color.black));
} else {
button.setEnabled(false);
button.getBackground().setAlpha(150); //0~255 之间任意调整
button.setTextColor(ContextCompat.getColor(this, R.color.colorAccent));
}
button.setText(text);
}
//设置toast的标准格式
private void showToast(String text) {
if (mToast == null) {
mToast = Toast.makeText(this, text, Toast.LENGTH_SHORT);
mToast.show();
} else {
mToast.setText(text);
mToast.show();
}
}
@Override
protected void onDestroy() {
super.onDestroy();
unregisterReceiver(receiver);
}
}二、 activity_discoverydevice.xml.
XML
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#eeeeee"
android:orientation="vertical"
tools:context=".Discoverydevice">
<Button
android:id="@+id/button1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/button_style"
android:text="扫描设备"
android:textColor="#000000" />
<TextView
android:id="@+id/textView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="50px"
android:text="附近设备" />
<ListView
android:id="@+id/listview2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20px"
android:background="@drawable/listview_style1" />
</LinearLayout>