android 连接蓝牙打印机 BluetoothAdapter
源码下载地址：https://github.com/yylxy/BluetoothText.git
public class PrintActivity extends AppCompatActivity {
//设备列表
private ListView listView;
private ArrayList<PrintBean> mBluetoothDevicesDatas;
private PrintAdapter adapter;
//蓝牙适配器
private BluetoothAdapter mBluetoothAdapter;
//请求的code
public static final int REQUEST_ENABLE_BT = 1;
private Switch mSwitch;
private FloatingActionButton mFloatingActionButton;
private ProgressBar mProgressBar;
private Toolbar toolbar;
private TextView searchHint;
/**
* 启动打印页面
*
* @param printContent 要打印的内容
*/
public static void starUi(Context context, String printContent) {
Intent intent = new Intent(context, PrintActivity.class);
intent.putExtra("id", id);
intent.putExtra("printContent", printContent);
context.startActivity(intent);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//广播注册
IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
registerReceiver(mReceiver, filter); // Don't forget to unregister during onDestroy
//初始化
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
mSwitch = (Switch) findViewById(R.id.switch1);
mFloatingActionButton = (FloatingActionButton) findViewById(R.id.floatingActionButton);
mProgressBar = (ProgressBar) findViewById(R.id.progressBar3);
toolbar = (Toolbar) findViewById(R.id.toolbar);
searchHint = (TextView) findViewById(R.id.searchHint);
toolbar.setTitle("选择打印设备");
listView = (ListView) findViewById(R.id.listView);
mBluetoothDevicesDatas = new ArrayList<>();
String printContent=getIntent().getStringExtra("printContent");
adapter = new PrintAdapter(this, mBluetoothDevicesDatas, TextUtils.isEmpty(printContent)?"123456789完
":printContent);
listView.setAdapter(adapter);
chechBluetooth();
addViewListener();
}
/**
* 判断有没有开启蓝牙
*/
private void chechBluetooth() {
//没有开启蓝牙
if (mBluetoothAdapter != null) {
if (!mBluetoothAdapter.isEnabled()) {
Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); // 设置蓝牙可见性，最多300秒
intent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 20);
startActivityForResult(intent, REQUEST_ENABLE_BT);
setViewStatus(true);
//开启蓝牙
} else {
searchDevices();
setViewStatus(true);
mSwitch.setChecked(true);
}
}
}
/**
* 搜索状态调整
*
* @param isSearch 是否开始搜索
*/
private void setViewStatus(boolean isSearch) {
if (isSearch) {
mFloatingActionButton.setVisibility(View.GONE);
searchHint.setVisibility(View.VISIBLE);
mProgressBar.setVisibility(View.VISIBLE);
} else {
mFloatingActionButton.setVisibility(View.VISIBLE);
mProgressBar.setVisibility(View.GONE);
searchHint.setVisibility(View.GONE);
}
}
/**
* 添加View的监听
*/
private void addViewListener() {
//蓝牙的状态
mSwitch.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked) {
openBluetooth();
setViewStatus(true);
} else {
closeBluetooth();
}
}
});
//重新搜索
mFloatingActionButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (mSwitch.isChecked()) {
searchDevices();
setViewStatus(true);
} else {
openBluetooth();
setViewStatus(true);
}
}
});
toolbar.setNavigationIcon(R.drawable.ic_arrow_back_black_24dp);
toolbar.setNavigationOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Toast.makeText(PrintActivity.this, "88", Toast.LENGTH_SHORT).show();
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK && requestCode == REQUEST_ENABLE_BT) {
Log.e("text", "开启蓝牙");
searchDevices();
mSwitch.setChecked(true);
mBluetoothDevicesDatas.clear();
adapter.notifyDataSetChanged();
} else if (resultCode == RESULT_CANCELED && requestCode == REQUEST_ENABLE_BT) {
Log.e("text", "没有开启蓝牙");
mSwitch.setChecked(false);
setViewStatus(false);
}
}
/**
* 打开蓝牙
*/
public void openBluetooth() {
Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); // 设置蓝牙可见性，最多300秒
intent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 20);
startActivityForResult(intent, REQUEST_ENABLE_BT);
}
/**
* 关闭蓝牙
*/
public void closeBluetooth() {
mBluetoothAdapter.disable();
}
/**
* 搜索蓝牙设备
*/
public void searchDevices() {
mBluetoothDevicesDatas.clear();
adapter.notifyDataSetChanged();
//开始搜索蓝牙设备
mBluetoothAdapter.startDiscovery();
}
/**
* 通过广播搜索蓝牙设备
*/
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
// 把搜索的设置添加到集合中
if (BluetoothDevice.ACTION_FOUND.equals(action)) {
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
//已经匹配的设备
if (device.getBondState() == BluetoothDevice.BOND_BONDED) {
addBluetoothDevice(device);
//没有匹配的设备
} else {
addBluetoothDevice(device);
}
adapter.notifyDataSetChanged();
//搜索完成
} else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
setViewStatus(false);
}
}
/**
* 添加数据
* @param device 蓝牙设置对象
*/
private void addBluetoothDevice(BluetoothDevice device) {
for (int i = 0; i < mBluetoothDevicesDatas.size(); i++) {
if (device.getAddress().equals(mBluetoothDevicesDatas.get(i).getAddress())) {
mBluetoothDevicesDatas.remove(i);
}
}
if (device.getBondState() == BluetoothDevice.BOND_BONDED && device.getBluetoothClass().getDeviceClass() == PRINT_TYPE) {
mBluetoothDevicesDatas.add(0, new PrintBean(device));
} else {
mBluetoothDevicesDatas.add(new PrintBean(device));
}
}
};
}
class PrintAdapter extends BaseAdapter {
private ArrayList<PrintBean> mBluetoothDevicesDatas;
private Context mContext;
//蓝牙适配器
private BluetoothAdapter mBluetoothAdapter;
//蓝牙socket对象
private BluetoothSocket mmSocket;
private UUID uuid;
//打印的输出流
private static OutputStream outputStream = null;
//搜索弹窗提示
ProgressDialog progressDialog = null;
private final int exceptionCod = 100;
//打印的内容
private String mPrintContent;
//在打印异常时更新ui
Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
if (msg.what == exceptionCod) {
Toast.makeText(mContext, "打印发送失败，请稍后再试", Toast.LENGTH_SHORT).show();
if (progressDialog != null) {
progressDialog.dismiss();
}
}
}
};
/**
* @param context 上下文
* @param mBluetoothDevicesDatas 设备列表
* @param printContent 打印的内容
*/
public PrintAdapter(Context context, ArrayList<PrintBean> mBluetoothDevicesDatas, String printContent) {
this.mBluetoothDevicesDatas = mBluetoothDevicesDatas;
mContext = context;
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
mPrintContent = printContent;
uuid = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
}
public int getCount() {
return mBluetoothDevicesDatas.size();
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
convertView = LayoutInflater.from(mContext).inflate(R.layout.itme, null);
View icon = convertView.findViewById(R.id.icon);
TextView name = (TextView) convertView.findViewById(R.id.name);
TextView address = (TextView) convertView.findViewById(R.id.address);
TextView start = (TextView) convertView.findViewById(R.id.start);
final PrintBean dataBean = mBluetoothDevicesDatas.get(position);
icon.setBackgroundResource(dataBean.getTypeIcon());
name.setText(dataBean.name);
address.setText(dataBean.isConnect ? "已连接" : "未连接");
start.setText(dataBean.getDeviceType(start));
//点击连接与打印
convertView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
try {
//如果已经连接并且是打印机
if (dataBean.isConnect && dataBean.getType() == PRINT_TYPE) {
if (mBluetoothAdapter.isEnabled()) {
new ConnectThread(mBluetoothAdapter.getRemoteDevice(dataBean.address)).start();
progressDialog = ProgressDialog.show(mContext, "提示", "正在打印...", true);
} else {
Toast.makeText(mContext, "蓝牙没有打开", Toast.LENGTH_SHORT).show();
}
//没有连接
} else {
//是打印机
if (dataBean.getType() == PRINT_TYPE) {
setConnect(mBluetoothAdapter.getRemoteDevice(dataBean.address), position);
//不是打印机
} else {
Toast.makeText(mContext, "该设备不是打印机", Toast.LENGTH_SHORT).show();
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
});
return convertView;
}
/**
* 匹配设备
*
* @param device 设备
*/
private void setConnect(BluetoothDevice device, int position) {
try {
Method createBondMethod = BluetoothDevice.class.getMethod("createBond");
createBondMethod.invoke(device);
mBluetoothDevicesDatas.get(position).setConnect(true);
notifyDataSetChanged();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 发送数据
*/
public void send(String sendData) {
try {
byte[] data = sendData.getBytes("gbk");
outputStream.write(data, 0, data.length);
outputStream.flush();
outputStream.close();
progressDialog.dismiss();
} catch (IOException e) {
e.printStackTrace();
handler.sendEmptyMessage(exceptionCod); // 向Handler发送消息,更新UI
}
}
/**
* 连接为客户端
*/
private class ConnectThread extends Thread {
public ConnectThread(BluetoothDevice device) {
try {
mmSocket = device.createRfcommSocketToServiceRecord(uuid);
} catch (IOException e) {
e.printStackTrace();
}
}
public void run() {
//取消的发现,因为它将减缓连接
mBluetoothAdapter.cancelDiscovery();
try {
//连接socket
mmSocket.connect();
//连接成功获取输出流
outputStream = mmSocket.getOutputStream();
send(mPrintContent);
} catch (Exception connectException) {
Log.e("test", "连接失败");
connectException.printStackTrace();
//异常时发消息更新UI
Message msg = new Message();
msg.what = exceptionCod;
// 向Handler发送消息,更新UI
handler.sendMessage(msg);
try {
mmSocket.close();
} catch (Exception closeException) {
closeException.printStackTrace();
}
return;
}
}
}
}