300 lines
10 KiB
Java
300 lines
10 KiB
Java
/*
|
|
* Copyright (C) 2013 The Android Open Source Project
|
|
* Copyright (C) 2017 Louis-Guillaume Dubois
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
package com.example.android.bluetoothlegatt;
|
|
|
|
import android.Manifest;
|
|
import android.app.Activity;
|
|
import android.app.ListActivity;
|
|
import android.bluetooth.BluetoothAdapter;
|
|
import android.bluetooth.BluetoothDevice;
|
|
import android.bluetooth.BluetoothManager;
|
|
import android.content.Context;
|
|
import android.content.Intent;
|
|
import android.content.pm.PackageManager;
|
|
import android.os.Bundle;
|
|
import android.os.Handler;
|
|
import android.support.v4.app.ActivityCompat;
|
|
import android.support.v4.content.ContextCompat;
|
|
import android.view.LayoutInflater;
|
|
import android.view.Menu;
|
|
import android.view.MenuItem;
|
|
import android.view.View;
|
|
import android.view.ViewGroup;
|
|
import android.widget.BaseAdapter;
|
|
import android.widget.ListView;
|
|
import android.widget.TextView;
|
|
import android.widget.Toast;
|
|
|
|
import java.util.ArrayList;
|
|
|
|
/**
|
|
* Activity for scanning and displaying available Bluetooth LE devices.
|
|
*/
|
|
public class DeviceScanActivity extends ListActivity {
|
|
private LeDeviceListAdapter mLeDeviceListAdapter;
|
|
private BluetoothAdapter mBluetoothAdapter;
|
|
private boolean mScanning;
|
|
private Handler mHandler;
|
|
|
|
private static final int REQUEST_ENABLE_COARSE_LOCATION = 2;
|
|
private static final int REQUEST_ENABLE_BT = 1;
|
|
// Stops scanning after 10 seconds.
|
|
private static final long SCAN_PERIOD = 10000;
|
|
|
|
@Override
|
|
public void onCreate(Bundle savedInstanceState) {
|
|
super.onCreate(savedInstanceState);
|
|
getActionBar().setTitle(R.string.title_devices);
|
|
mHandler = new Handler();
|
|
|
|
// Use this check to determine whether BLE is supported on the device. Then you can
|
|
// selectively disable BLE-related features.
|
|
if (!getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE)) {
|
|
Toast.makeText(this, R.string.ble_not_supported, Toast.LENGTH_SHORT).show();
|
|
finish();
|
|
}
|
|
|
|
// Initializes a Bluetooth adapter. For API level 18 and above, get a reference to
|
|
// BluetoothAdapter through BluetoothManager.
|
|
final BluetoothManager bluetoothManager =
|
|
(BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
|
|
mBluetoothAdapter = bluetoothManager.getAdapter();
|
|
|
|
// Checks if Bluetooth is supported on the device.
|
|
if (mBluetoothAdapter == null) {
|
|
Toast.makeText(this, R.string.error_bluetooth_not_supported, Toast.LENGTH_SHORT).show();
|
|
finish();
|
|
return;
|
|
}
|
|
|
|
// demande des permissions au cas où
|
|
if (ContextCompat.checkSelfPermission(this,
|
|
Manifest.permission.ACCESS_COARSE_LOCATION)
|
|
!= PackageManager.PERMISSION_GRANTED) {
|
|
|
|
// Should we show an explanation?
|
|
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
|
|
Manifest.permission.ACCESS_COARSE_LOCATION)) {
|
|
|
|
// Show an explanation to the user *asynchronously* -- don't block
|
|
// this thread waiting for the user's response! After the user
|
|
// sees the explanation, try again to request the permission.
|
|
|
|
} else {
|
|
|
|
// No explanation needed, we can request the permission.
|
|
|
|
ActivityCompat.requestPermissions(this,
|
|
new String[]{Manifest.permission.ACCESS_COARSE_LOCATION},
|
|
REQUEST_ENABLE_COARSE_LOCATION);
|
|
|
|
// REQUEST_ENABLE_ACCESS_COARSE_LOCATION is an
|
|
// app-defined int constant. The callback method gets the
|
|
// result of the request.
|
|
}
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public boolean onCreateOptionsMenu(Menu menu) {
|
|
getMenuInflater().inflate(R.menu.main, menu);
|
|
if (!mScanning) {
|
|
menu.findItem(R.id.menu_stop).setVisible(false);
|
|
menu.findItem(R.id.menu_scan).setVisible(true);
|
|
menu.findItem(R.id.menu_refresh).setActionView(null);
|
|
} else {
|
|
menu.findItem(R.id.menu_stop).setVisible(true);
|
|
menu.findItem(R.id.menu_scan).setVisible(false);
|
|
menu.findItem(R.id.menu_refresh).setActionView(
|
|
R.layout.actionbar_indeterminate_progress);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
@Override
|
|
public boolean onOptionsItemSelected(MenuItem item) {
|
|
switch (item.getItemId()) {
|
|
case R.id.menu_scan:
|
|
mLeDeviceListAdapter.clear();
|
|
scanLeDevice(true);
|
|
break;
|
|
case R.id.menu_stop:
|
|
scanLeDevice(false);
|
|
break;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
@Override
|
|
protected void onResume() {
|
|
super.onResume();
|
|
|
|
// Ensures Bluetooth is enabled on the device. If Bluetooth is not currently enabled,
|
|
// fire an intent to display a dialog asking the user to grant permission to enable it.
|
|
if (!mBluetoothAdapter.isEnabled()) {
|
|
if (!mBluetoothAdapter.isEnabled()) {
|
|
Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
|
|
startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
|
|
}
|
|
}
|
|
|
|
// Initializes list view adapter.
|
|
mLeDeviceListAdapter = new LeDeviceListAdapter();
|
|
setListAdapter(mLeDeviceListAdapter);
|
|
scanLeDevice(true);
|
|
}
|
|
|
|
@Override
|
|
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
|
|
// User chose not to enable Bluetooth.
|
|
if (requestCode == REQUEST_ENABLE_BT && resultCode == Activity.RESULT_CANCELED) {
|
|
finish();
|
|
return;
|
|
}
|
|
super.onActivityResult(requestCode, resultCode, data);
|
|
}
|
|
|
|
@Override
|
|
protected void onPause() {
|
|
super.onPause();
|
|
scanLeDevice(false);
|
|
mLeDeviceListAdapter.clear();
|
|
}
|
|
|
|
@Override
|
|
protected void onListItemClick(ListView l, View v, int position, long id) {
|
|
final BluetoothDevice device = mLeDeviceListAdapter.getDevice(position);
|
|
if (device == null) return;
|
|
final Intent intent = new Intent(this, DeviceControlActivity.class);
|
|
intent.putExtra(DeviceControlActivity.EXTRAS_DEVICE_NAME, device.getName());
|
|
intent.putExtra(DeviceControlActivity.EXTRAS_DEVICE_ADDRESS, device.getAddress());
|
|
if (mScanning) {
|
|
mBluetoothAdapter.stopLeScan(mLeScanCallback);
|
|
mScanning = false;
|
|
}
|
|
startActivity(intent);
|
|
}
|
|
|
|
private void scanLeDevice(final boolean enable) {
|
|
if (enable) {
|
|
// Stops scanning after a pre-defined scan period.
|
|
mHandler.postDelayed(new Runnable() {
|
|
@Override
|
|
public void run() {
|
|
mScanning = false;
|
|
mBluetoothAdapter.stopLeScan(mLeScanCallback);
|
|
invalidateOptionsMenu();
|
|
}
|
|
}, SCAN_PERIOD);
|
|
|
|
mScanning = true;
|
|
mBluetoothAdapter.startLeScan(mLeScanCallback);
|
|
} else {
|
|
mScanning = false;
|
|
mBluetoothAdapter.stopLeScan(mLeScanCallback);
|
|
}
|
|
invalidateOptionsMenu();
|
|
}
|
|
|
|
// Adapter for holding devices found through scanning.
|
|
private class LeDeviceListAdapter extends BaseAdapter {
|
|
private ArrayList<BluetoothDevice> mLeDevices;
|
|
private LayoutInflater mInflator;
|
|
|
|
public LeDeviceListAdapter() {
|
|
super();
|
|
mLeDevices = new ArrayList<BluetoothDevice>();
|
|
mInflator = DeviceScanActivity.this.getLayoutInflater();
|
|
}
|
|
|
|
public void addDevice(BluetoothDevice device) {
|
|
if(!mLeDevices.contains(device)) {
|
|
mLeDevices.add(device);
|
|
}
|
|
}
|
|
|
|
public BluetoothDevice getDevice(int position) {
|
|
return mLeDevices.get(position);
|
|
}
|
|
|
|
public void clear() {
|
|
mLeDevices.clear();
|
|
}
|
|
|
|
@Override
|
|
public int getCount() {
|
|
return mLeDevices.size();
|
|
}
|
|
|
|
@Override
|
|
public Object getItem(int i) {
|
|
return mLeDevices.get(i);
|
|
}
|
|
|
|
@Override
|
|
public long getItemId(int i) {
|
|
return i;
|
|
}
|
|
|
|
@Override
|
|
public View getView(int i, View view, ViewGroup viewGroup) {
|
|
ViewHolder viewHolder;
|
|
// General ListView optimization code.
|
|
if (view == null) {
|
|
view = mInflator.inflate(R.layout.listitem_device, null);
|
|
viewHolder = new ViewHolder();
|
|
viewHolder.deviceAddress = (TextView) view.findViewById(R.id.device_address);
|
|
viewHolder.deviceName = (TextView) view.findViewById(R.id.device_name);
|
|
view.setTag(viewHolder);
|
|
} else {
|
|
viewHolder = (ViewHolder) view.getTag();
|
|
}
|
|
|
|
BluetoothDevice device = mLeDevices.get(i);
|
|
final String deviceName = device.getName();
|
|
if (deviceName != null && deviceName.length() > 0)
|
|
viewHolder.deviceName.setText(deviceName);
|
|
else
|
|
viewHolder.deviceName.setText(R.string.unknown_device);
|
|
viewHolder.deviceAddress.setText(device.getAddress());
|
|
|
|
return view;
|
|
}
|
|
}
|
|
|
|
// Device scan callback.
|
|
private BluetoothAdapter.LeScanCallback mLeScanCallback =
|
|
new BluetoothAdapter.LeScanCallback() {
|
|
|
|
@Override
|
|
public void onLeScan(final BluetoothDevice device, int rssi, byte[] scanRecord) {
|
|
runOnUiThread(new Runnable() {
|
|
@Override
|
|
public void run() {
|
|
mLeDeviceListAdapter.addDevice(device);
|
|
mLeDeviceListAdapter.notifyDataSetChanged();
|
|
}
|
|
});
|
|
}
|
|
};
|
|
|
|
static class ViewHolder {
|
|
TextView deviceName;
|
|
TextView deviceAddress;
|
|
}
|
|
} |