上次我发布了有关BLE的问题。我对BLE和经典蓝牙感到困惑。现在，我编写这段代码，从Internet上获得了很多帮助，但是现在，我陷入了如何将数据发送到BLE服务器以及如何从BLE服务器读取数据的问题。此数据以逗号分隔。其次是宪章。我用的是UTF-8
define SERVICE_UUID "ab0828b1-198e-4351-b779-901fa0e0371e"
define CHARACTERISTIC_UUID_RX "4ac8a682-9736-4e5d-932b-e9b31405049c"
define CHARACTERISTIC_UUID_TX "0972EF8C-7613-4075-AD52-756F33D4DA91"
UUI是RX的可读性和TX的可写性。
import android.Manifest;
import android.graphics.Rect;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.util.SparseArray;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import com.ficat.easyble.BleDevice;
import com.ficat.easyble.BleManager;
import com.ficat.easyble.gatt.bean.CharacteristicInfo;
import com.ficat.easyble.gatt.bean.ServiceInfo;
import com.ficat.easyble.gatt.callback.BleConnectCallback;
import com.ficat.easyble.gatt.callback.BleWriteCallback;
import com.ficat.easyble.scan.BleScanCallback;
import com.ficat.easypermissions.EasyPermissions;
import com.ficat.easypermissions.RequestExecutor;
import com.ficat.easypermissions.bean.Permission;
import com.ficat.sample.adapter.ScanDeviceAdapter;
import com.ficat.sample.adapter.common.CommonRecyclerViewAdapter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private final static String CHARACTERISTIC_READABLE = "4ac8a682-9736-4e5d-932b-e9b31405049c";
private final static String CHARACTERISTIC_WRITABLE = "0972EF8C-7613-4075-AD52-756F33D4DA91";
private final static int CHARACTERISTIC_NOTIFICATION = 103;
private RecyclerView rv;
private BleManager manager;
private List<BleDevice> deviceList = new ArrayList<>();
private ScanDeviceAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
initBleManager();
showDevicesByRv();
}
private void initView() {
Button btnScan = findViewById(R.id.btn_scan);
Button btnDisconnect = findViewById(R.id.btn_disconnect);
Button btnNotify = findViewById(R.id.btn_notify);
Button btnWrite = findViewById(R.id.btn_write);
rv = findViewById(R.id.rv);
btnScan.setOnClickListener(this);
btnDisconnect.setOnClickListener(this);
btnNotify.setOnClickListener(this);
btnWrite.setOnClickListener(this);
}
private void initBleManager() {
//check if this android device supports ble
if (!BleManager.supportBle(this)) {
return;
}
//open bluetooth without a request dialog
BleManager.toggleBluetooth(true);
BleManager.Options options = new BleManager.Options();
options.loggable = true;
options.scanPeriod = 10000;
options.connectTimeout = 10000;
manager = BleManager.getInstance(getApplication());
manager.option(options);
}
private void showDevicesByRv() {
rv.setLayoutManager(new LinearLayoutManager(this));
rv.addItemDecoration(new RecyclerView.ItemDecoration() {
@Override
public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
super.getItemOffsets(outRect, view, parent, state);
outRect.top = 3;
}
});
SparseArray<int[]> res = new SparseArray<>();
res.put(R.layout.item_rv_scan_devices, new int[]{R.id.tv_name, R.id.tv_address, R.id.tv_connection_state});
adapter = new ScanDeviceAdapter(this, deviceList, res);
adapter.setOnItemClickListener(new CommonRecyclerViewAdapter.OnItemClickListener() {
@Override
public void onItemClick(View itemView, int position) {
manager.stopScan();
manager.connect(deviceList.get(position), new BleConnectCallback() {
@Override
public void onStart(boolean startConnectSuccess, String info, BleDevice device) {
Log.e(TAG, "start connecting = " + startConnectSuccess + " info: " + info);
}
@Override
public void onTimeout(BleDevice device) {
Toast.makeText(MainActivity.this, "connect timeout!", Toast.LENGTH_SHORT).show();
}
@Override
public void onConnected(BleDevice device) {
adapter.notifyDataSetChanged();
}
@Override
public void onDisconnected(BleDevice device) {
adapter.notifyDataSetChanged();
}
});
}
});
rv.setAdapter(adapter);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btn_scan:
if (!BleManager.isBluetoothOn()) {
BleManager.toggleBluetooth(true);
}
EasyPermissions
.with(this)
.request(Manifest.permission.ACCESS_COARSE_LOCATION)
.autoRetryWhenUserRefuse(true, null)
.result(new RequestExecutor.ResultReceiver() {
@Override
public void onPermissionsRequestResult(boolean grantAll, List<Permission> results) {
if (grantAll) {
if (!manager.isScanning()) {
startScan();
}
} else {
Toast.makeText(MainActivity.this,
"Please go to settings to grant location permission manually",
Toast.LENGTH_LONG).show();
EasyPermissions.goToSettingsActivity(MainActivity.this);
}
}
});
break;
case R.id.btn_disconnect:
manager.disconnectAll();
break;
case R.id.btn_notify:
testNotify();
break;
case R.id.btn_write:
testWrite();
break;
default:
break;
}
}
private void startScan() {
manager.startScan(new BleScanCallback() {
@Override
public void onLeScan(BleDevice device, int rssi, byte[] scanRecord) {
for (BleDevice d : deviceList) {
if (device.address.equals(d.address)) {
return;
}
}
deviceList.add(device);
adapter.notifyDataSetChanged();
}
@Override
public void onStart(boolean startScanSuccess, String info) {
Log.e(TAG, "start scan = " + startScanSuccess + " info: " + info);
if (startScanSuccess) {
deviceList.clear();
adapter.notifyDataSetChanged();
}
}
@Override
public void onFinish() {
Log.e(TAG, "scan finish");
}
});
}
private void testWrite() {
if (manager.getConnectedDevices().size() <= 0) {
Toast.makeText(MainActivity.this, "No connected devices", Toast.LENGTH_SHORT).show();
return;
}
//we use the first connected device to test
BleDevice device1 = manager.getConnectedDevices().get(0);
//randomly finding a writable characteristic to test
Map<String, String> notificationInfo1 = getSpecificServiceInfo(device1, CHARACTERISTIC_WRITABLE);
for (Map.Entry<String, String> e : notificationInfo1.entrySet()) {
manager.write(device1, e.getKey(), e.getValue(), "TestWriteData001".getBytes(), new BleWriteCallback() {
@Override
public void onWrite(byte[] data, BleDevice device) {
Toast.makeText(MainActivity.this, "write success! data: " + new String(data), Toast.LENGTH_LONG).show();
}
@Override
public void onFail(int failCode, String info, BleDevice device) {
Toast.makeText(MainActivity.this, "write fail: " + info, Toast.LENGTH_SHORT).show();
}
});
return;
}
}
private void testNotify() {
if (manager.getConnectedDevices().size() <= 0) {
Toast.makeText(MainActivity.this, "No connected devices", Toast.LENGTH_SHORT).show();
return;
}
//we use the first connected device to test
BleDevice device = manager.getConnectedDevices().get(0);
}
private Map<String, String> getSpecificServiceInfo(BleDevice device, String characteristicProperty) {
Map<String, String> map = new HashMap<>();
Map<ServiceInfo, List<CharacteristicInfo>> serviceInfo = manager.getDeviceServices(device);
for (Map.Entry<ServiceInfo, List<CharacteristicInfo>> entry : serviceInfo.entrySet()) {
String serviceUuid = entry.getKey().uuid;
for (CharacteristicInfo charInfo : entry.getValue()) {
boolean specificReadable = characteristicProperty.equals(CHARACTERISTIC_READABLE) && charInfo.readable;
boolean specificWritable = characteristicProperty.equals(CHARACTERISTIC_WRITABLE) && charInfo.writable;
}
}
return map;
}
}