透過簡單的函式使用 spp bluetooth 設備…
bt_init("HC-05");
將底下程式碼 copy 到 activity 中使用…
// ======== START Bluetooth functions ======== //
BluetoothAdapter mmBluetoothAdapter = null;
BluetoothDevice mmDevice = null;
BluetoothSocket mmSocket = null;
OutputStream mmOutputStream = null;
InputStream mmInputStream = null;
Thread bt_read = null;
// try to open a Serial Port Profile Bluetooth Device
public void bt_init(String device_name) {
mmBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (mmBluetoothAdapter == null) {
Toast.makeText(this, "Bluetooth not found", Toast.LENGTH_SHORT).show();
return;
}
if (!mmBluetoothAdapter.isEnabled()) {
Intent enableBluetooth = new Intent(
BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBluetooth, 0);
Toast.makeText(this, "Bluetooth not enabled", Toast.LENGTH_SHORT).show();
return;
}
Set
paired = mmBluetoothAdapter.getBondedDevices();
if (paired.size() == 0) {
Toast.makeText(this, "No paired bluetooth devices", Toast.LENGTH_SHORT).show();
return;
}
for (BluetoothDevice device : paired) {
if (device.getName().equals(device_name)) {
mmDevice = device;
break;
}
}
if (mmDevice == null) {
Toast.makeText(this, "Device not found", Toast.LENGTH_SHORT).show();
return;
}
// Serial Port Profile UUID
UUID uuid = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb");
try {
mmSocket = mmDevice.createRfcommSocketToServiceRecord(uuid);
mmSocket.connect();
mmOutputStream = mmSocket.getOutputStream();
mmInputStream = mmSocket.getInputStream();
} catch (IOException e) {
e.printStackTrace();
Toast.makeText(this, "Bluetooth connect fail", Toast.LENGTH_SHORT).show();
return;
}
// TODO: read data
bt_read = new Thread(new Runnable() {
public void run() {
while (true) {
try {
// read a char from bluetooth device
if (mmInputStream.available() > 0) {
int c = mmInputStream.read();
bt_write(c); // ECHO
}
} catch (IOException ex) {
break;
}
}
}
});
bt_read.start();
Toast.makeText(this, "Bluetooth connected", Toast.LENGTH_SHORT).show();
}
// TODO: write data
// write a char to bluetooth device
void bt_write(int c) {
try {
if (mmOutputStream != null)
mmOutputStream.write(c);
} catch (IOException e) {
e.printStackTrace();
}
}
// ======== END Bluetooth functions ======== //
記得 uses-permission
要增加…
android.permission.BLUETOOTH
android.permission.BLUETOOTH_ADMIN
