Bluetooth connection of mobile phone uses Jiabo printer (ZH380)

Bluetooth privileges

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

android 6.0 and above also need to add location permission

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

And dynamic authorization

public void applypermission(){
    if(Build.VERSION.SDK_INT>=23){
        int checkpermission= ContextCompat.checkSelfPermission(getApplicationContext(),
                Manifest.permission.ACCESS_FINE_LOCATION);
        if(checkpermission!=PackageManager.PERMISSION_GRANTED){
            ActivityCompat.requestPermissions(MainActivity.this,new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 1);
        }
    }
}
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    for(int i=0;i<grantResults.length;i++){
        if(grantResults[i]==PackageManager.PERMISSION_GRANTED){
            Toast.makeText(MainActivity.this, permissions[i]+"Authorized",Toast.LENGTH_SHORT).show();
        }
        else {
            Toast.makeText(MainActivity.this,permissions[i]+"Deny authorization",Toast.LENGTH_SHORT).show();
        }
    }
}

 

Query Bluetooth device, turn on Bluetooth

private BluetoothAdapter adapter = null; 

adapter = BluetoothAdapter.getDefaultAdapter();

if(adapter != null){
    System.out.println("This machine has Bluetooth device!");
    if(!adapter.isEnabled()){
        Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
        startActivity(intent);//Turn on Bluetooth                                                  
    }
    else {
        Toast.makeText(MainActivity.this,"Bluetooth on",Toast.LENGTH_SHORT).show();
    }
}
else{
    Toast.makeText(MainActivity.this,"No Bluetooth",Toast.LENGTH_SHORT).show();
}

Sign up for radio, search for Bluetooth devices around you

View Bluetooth devices to bind

List<BluetoothDevice> bondDevices = new ArrayList<>();//Bluetooth device stored for binding

Set<BluetoothDevice> devices = adapter.getBondedDevices();//Get Bluetooth device to bind
if(devices.size()>0){
    for(Iterator<BluetoothDevice> it = devices.iterator();it.hasNext();){
        BluetoothDevice device = (BluetoothDevice)it.next();
        System.out.println(device.getAddress());//MAC address of Bluetooth device
        System.out.println(device.getName());//Bluetooth device name
        bondDevices.add(device);
    }
}

Search the surrounding Bluetooth devices through broadcast

List<BluetoothDevice> unbondDevices = new ArrayList<>();//Store the searched Bluetooth device

IntentFilter intentFilter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
bluetoothReceiver = new BluetoothReceiver ();
registerReceiver(bluetoothReceiver,intentFilter);//Sign up to start broadcasting

class BluetoothReceiver extends BroadcastReceiver{
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if( BluetoothDevice.ACTION_FOUND.equals(action)){
            BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
            if(BluetoothDevice.BOND_NONE==device.getBondState()) {
                System.out.println(device.getAddress());
                System.out.println(device.getName());
                unbondDevices.add(device);
            }
        } else if(adapter.ACTION_DISCOVERY_FINISHED.equals(action)){
            System.out.println("complete");
        }
    }
}

Select Bluetooth device to bind

try {
    Method createBondMethod = BluetoothDevice.class.getMethod("createBond");
    createBondMethod.invoke(device);//binding
}catch (Exception e){
    Toast.makeText(MainActivity.this,device.getName()+"Pairing failure- -",Toast.LENGTH_SHORT).show();

}

if(device.getBondState()==BluetoothDevice.BOND_BONDED){  //Query whether the binding is successful

}

Operate through the official SDK of Jiabo printer

Since the Jiabo printer used has an official user manual, you can follow the steps step by step

https://pan.baidu.com/s/1kfzEV55qGdF_0PKnWs_HSA data