package info.izumin.android.rx.sample;
import android.Manifest;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothGattCharacteristic;
import android.bluetooth.BluetoothManager;
import android.bluetooth.le.BluetoothLeScanner;
import android.bluetooth.le.ScanCallback;
import android.bluetooth.le.ScanResult;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import java.util.UUID;
import butterknife.Bind;
import butterknife.ButterKnife;
import butterknife.OnClick;
import butterknife.OnItemClick;
import info.izumin.android.bletia.core.BleState;
import info.izumin.android.bletia.rx.RxBletia;
import rx.Subscription;
import rx.android.schedulers.AndroidSchedulers;
import rx.subscriptions.CompositeSubscription;
public class MainActivity extends AppCompatActivity {
private static final String TAG = MainActivity.class.getSimpleName();
public static final UUID ALERT_SERVICE_UUID = UUID.fromString("00001802-0000-1000-8000-00805f9b34fb");
public static final UUID BATTERY_SERVICE_UUID = UUID.fromString("0000180f-0000-1000-8000-00805f9b34fb");
public static final UUID BATTERY_UUID = UUID.fromString("00002a19-0000-1000-8000-00805f9b34fb");
public static final UUID BATTERY_POWER_STATE_UUID = UUID.fromString("00002a1b-0000-1000-8000-00805f9b34fb");
public static final UUID ALERT_LEVEL_UUID = UUID.fromString("00002a06-0000-1000-8000-00805f9b34fb");
private final static int REQUEST_ENABLE_BT = 1;
private final static int REQUEST_LOCATION = 3;
private RxBletia mBletia;
private CompositeSubscription mSubscriptions;
private BluetoothManager mBluetoothManager;
private BluetoothAdapter mBluetoothAdapter;
private BluetoothLeScanner mScanner;
private BleDeviceAdapter mDeviceAdapter;
private Menu mMenu;
@Bind(R.id.list_devices)
ListView mDeviceListView;
@Bind(R.id.main)
View mMainContent;
@Bind(R.id.text_battery_level)
TextView mTextBatteryLevel;
@Bind(R.id.text_battery_state)
TextView mTextBatteryState;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.bind(this);
mDeviceAdapter = new BleDeviceAdapter(this);
mDeviceListView.setAdapter(mDeviceAdapter);
mBluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
mBluetoothAdapter = mBluetoothManager.getAdapter();
mBletia = new RxBletia(getApplicationContext());
mBletia.observeError().subscribe(e -> {
BleState state = mBletia.getState();
Log.d(TAG, "[" + state.name() + "] " + e.getMessage());
if (state == BleState.DISCONNECTED) {
refresh(false);
}
});
mSubscriptions = new CompositeSubscription();
}
@Override
protected void onDestroy() {
if (mScanner != null) {
mScanner.stopScan(mScanCallback);
}
super.onDestroy();
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case REQUEST_ENABLE_BT:
if (isEnabledBle()) { scanBleDevice(); }
break;
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
if (requestCode == REQUEST_LOCATION) {
if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
scanBleDevice();
} else {
Toast.makeText(this, "permission does not granted", Toast.LENGTH_SHORT).show();
}
} else {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
mMenu = menu;
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_connect:
scanBleDevice();
return true;
case R.id.action_disconnect:
mBletia.disconnect()
.observeOn(AndroidSchedulers.mainThread())
.subscribe(
_void -> {
Log.d(TAG, "Device disconnected...");
refresh(false);
},
throwable -> Log.d(TAG, throwable.getMessage())
);
return true;
}
return super.onOptionsItemSelected(item);
}
private void connect(BluetoothDevice device) {
Subscription subscription = mBletia.connect(device)
.flatMap(_void -> mBletia.discoverServices())
.observeOn(AndroidSchedulers.mainThread())
.doOnNext(_void -> refresh(true))
.flatMap(_void -> mBletia.enableNotification(getBatteryStateCharacteristic()))
.filter(characteristic -> characteristic.getValue() != null)
.observeOn(AndroidSchedulers.mainThread())
.subscribe(
characteristic -> mTextBatteryState.setText(String.valueOf(characteristic.getValue()[0])),
throwable -> Log.d(TAG, throwable.getMessage())
);
mSubscriptions.add(subscription);
}
@OnItemClick(R.id.list_devices)
void onDeviceSelected(int position) {
BluetoothDevice device = mDeviceAdapter.getItem(position);
Log.d(TAG, "Connected to " + device.getName() + " !");
mScanner.stopScan(mScanCallback);
connect(device);
}
@OnClick(R.id.btn_alert_off)
void onClickBtnAlertOff() {
mBletia.writeCharacteristic(getAlertLevelCharacteristic(0))
.subscribe(
characteristic -> {},
throwable -> Log.d(TAG, throwable.getMessage())
);
}
@OnClick(R.id.btn_alert_vibration)
void onClickBtnAlertVibration() {
mBletia.writeCharacteristic(getAlertLevelCharacteristic(1))
.subscribe(
characteristic -> {},
throwable -> Log.d(TAG, throwable.getMessage())
);
}
@OnClick(R.id.btn_alert_alarm)
void onClickBtnAlertAlarm() {
mBletia.writeCharacteristic(getAlertLevelCharacteristic(2))
.subscribe(
characteristic -> {},
throwable -> Log.d(TAG, throwable.getMessage())
);
}
@OnClick(R.id.btn_read_battery)
void onClickBtnReadBattery() {
mBletia.readCharacteristic(mBletia.getService(BATTERY_SERVICE_UUID).getCharacteristic(BATTERY_UUID))
.observeOn(AndroidSchedulers.mainThread())
.subscribe(
characteristic -> mTextBatteryLevel.setText(String.valueOf(characteristic.getValue()[0])),
throwable -> Log.d(TAG, throwable.getMessage())
);
}
private boolean isEnabledBle() {
return (mBluetoothAdapter != null) && mBluetoothAdapter.isEnabled();
}
private void scanBleDevice() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
requestPermissions(new String[]{Manifest.permission.ACCESS_COARSE_LOCATION}, REQUEST_LOCATION);
return;
}
}
mScanner = mBluetoothAdapter.getBluetoothLeScanner();
mScanner.startScan(mScanCallback);
}
private void refresh(final boolean isConnected) {
runOnUiThread(() -> {
mMenu.findItem(R.id.action_connect).setVisible(!isConnected);
mMenu.findItem(R.id.action_disconnect).setVisible(isConnected);
mDeviceListView.setVisibility(isConnected ? View.GONE : View.VISIBLE);
mMainContent.setVisibility(isConnected ? View.VISIBLE : View.GONE);
});
}
private BluetoothGattCharacteristic getAlertLevelCharacteristic(int level) {
BluetoothGattCharacteristic characteristic = mBletia.getService(ALERT_SERVICE_UUID).getCharacteristic(ALERT_LEVEL_UUID);
characteristic.setValue(new byte[]{(byte) level});
return characteristic;
}
private BluetoothGattCharacteristic getBatteryStateCharacteristic() {
return mBletia.getService(BATTERY_SERVICE_UUID).getCharacteristic(BATTERY_POWER_STATE_UUID);
}
private final ScanCallback mScanCallback = new ScanCallback() {
@Override
public void onScanResult(int callbackType, ScanResult result) {
BluetoothDevice device = result.getDevice();
Log.d(TAG, callbackType + ": " + device.getName() + ", " + device.getAddress());
if ((device.getName() != null) && !mDeviceAdapter.hasDevice(device)) {
mDeviceAdapter.add(device);
}
}
};
}