ble/BleConnect.java

package st.wow.git.ble;

import java.lang.Runnable;
import android.util.Log;
import java.lang.Class;
import java.lang.ClassLoader;
import java.lang.reflect.Constructor;
import android.app.Activity;
import android.app.Fragment;
import android.os.Handler;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothGatt;
import android.bluetooth.BluetoothGattCallback;
import android.bluetooth.BluetoothGattService;
import android.bluetooth.BluetoothManager;
import android.bluetooth.BluetoothProfile;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.Manifest;

public class BleConnect extends Fragment {
	BluetoothManager manager;
	BluetoothAdapter adapter;

	final int PERMISSION_REQUEST = 1;

	final int REQUEST_ENABLE_BT = 1;

	public BleConnect() {
		Log.d("gio", "BleConnect()");
	}

	@Override public void onAttach(Context ctx) {
		super.onAttach(ctx);
		Log.d("gio", "BleConnect: onAttach()");
		ctx.registerReceiver(receiver, new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED));
		manager = (BluetoothManager) ctx.getSystemService(ctx.BLUETOOTH_SERVICE);
		Log.d("gio", "BleUtil Enable: adapter");
		adapter = manager.getAdapter();
		if (!enabled()) {
			Log.d("gio", "BleConnect: enabling adapter");
			Handler handler = new Handler(ctx.getMainLooper());
			Intent enableBtIntent = new Intent(adapter.ACTION_REQUEST_ENABLE);
			Log.d("gio", "BleConnect: handler.post");
			handler.post(new Runnable() {
				public void run() {
					startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
				}
			});
		} else {
			Log.d("gio", "BleConnect: adapter is enabled");
		}
		if (ctx.checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                        requestPermissions(new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, PERMISSION_REQUEST);
                }
		installComplete(this);
	}

	public boolean enabled() {
		return (adapter != null && adapter.isEnabled());
	}

	private final BroadcastReceiver receiver = new BroadcastReceiver() {
		@Override
		public void onReceive(Context context, Intent intent) {
			Log.d("gio", "Received broadcast");
			if (intent.getAction().equals(BluetoothAdapter.ACTION_STATE_CHANGED)) {
				updateState(intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, -1));
			}
		}
	};

	@Override
	public void onDestroy() {
		Log.d("gio","onDestroy()");
		stopScan();
		getContext().unregisterReceiver(receiver);
		super.onDestroy();
	}

	private final BluetoothAdapter.LeScanCallback scanCallback = new BluetoothAdapter.LeScanCallback() {
		public void onLeScan(final BluetoothDevice dev, int rssi, byte[] scanRecord) {
			Log.d("gio","onLeScan(): " + dev.getName());
			onScan(dev.getName(), dev.getAddress(), rssi, dev);
		}
	};

	public void scan() {
		if (!enabled()) {
			return;
		}
		adapter.startLeScan(scanCallback);
	}

	public void stopScan() {
		if (!enabled()) {
			return;
		}
		Log.d("gio", "Stop scan");
		adapter.stopLeScan(scanCallback);
	}

	private BluetoothDevice device;
	private BluetoothGatt bluetoothGatt;

	private final BluetoothGattCallback gattCallback = new BluetoothGattCallback() {
@Override
		public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
			if (newState == BluetoothProfile.STATE_CONNECTED) {
				Log.d("gio", "Connected");
				String addr = device.getAddress();
				Log.d("gio", "Address = " + addr);
				onConnect(device.getAddress());
			}
		}
		public void onServicesDiscovered(BluetoothGatt gatt, int status) {
			for (BluetoothGattService serv : gatt.getServices()) {
				onDiscoverService(device.getAddress(), serv.getUuid().toString());
			}
		}
	};


	public void connect(BluetoothDevice dev) {
		if (dev == null) {
			return;
		}
		Log.d("gio","BleConnect: connect");
		device = dev;
		bluetoothGatt = dev.connectGatt(getContext(), false, gattCallback);
	}

	public void disconnect() {
		device = null;
		if (bluetoothGatt == null) {
			return;
		}
		Log.d("gio","BleConnect: disconnect");
		bluetoothGatt.disconnect();
	}

	public void discoverServices(BluetoothDevice dev) {
		if (bluetoothGatt == null || device == null) {
			return;
		}
		if (!dev.getAddress().equals(device.getAddress())) {
			disconnect();
			return;
		}
		bluetoothGatt.discoverServices();
	}

	@Override public void onActivityResult(int requestCode, int resultCode, Intent data) {
		Log.d("gio", "BleConnect: onActivityResult()");
		if (requestCode == REQUEST_ENABLE_BT) {
			Log.d("gio", "BleConnect: onActivityResult() REQUEST_ENABLE_BT");
			switch (resultCode) {
				case Activity.RESULT_OK: {
					Log.d("gio", "BleConnect: onActivityResult() -- OK");
					break;
				}
				case Activity.RESULT_CANCELED: {
					Log.d("gio", "BleConnect: onActivityResult() -- Cancelled");
					break;
				}
			}
		}
	}

	static private native void installComplete(BleConnect p);
	static private native void updateState(int s);
	static private native void onScan(String name, String id, int rssi, BluetoothDevice dev);
	static private native void onConnect(String id);
	static private native void onDiscoverService(String id, String uuid);
}