Android Open Source - BLEService Scan Activity

• Back to Hardware/service  ↑

From Project

Back to project page BLEService.

License

The source code is released under:

Copyright (c) 2014, Ratio LLC. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: ...

Java Source Code

package com.ratio.btdemo;
//from   www. j  a v  a 2 s. c o  m
import java.util.UUID;

import com.ratio.deviceService.BTDeviceProfile;
import com.ratio.deviceService.DeviceService;
import com.ratio.deviceService.IDeviceCommand;

import android.os.Bundle;
import android.os.IBinder;
import android.os.RemoteException;
import android.app.Activity;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.ServiceConnection;
import android.content.SharedPreferences;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;

public class ScanActivity extends Activity {
  protected final static String       TAG = ScanActivity.class.getSimpleName();
    public static final String         PREFS = "BT_PREFS";
  public static final String         SCAN_TIMEOUT = "scan_timeout";
  public static final int         SCAN_TIMEOUT_DEFAULT_SEC = 20;
  public static final String         RECONNECT_DELAY = "reconnect_delay";
  public static final int         RECONNECT_DELAY_DEFAULT = 10;
  public static final String         CONNECT_TIMEOUT = "connect_timeout";
  public static final String        EXTRA_DEVICE = "device";
  protected boolean            mfScanning = false;
  protected IDeviceCommand         mService;            // service for device interface.
  protected DeviceServiceConnection     mConnection;          // connection to the device service.
  protected DeviceDiscoveredReceiver    mDeviceDiscoveredReceiver;
  protected ScanStopReceiver        mScanStopReceiver;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_scan);
    initializeDeviceService();
  }  
  
  
  // set up the broadcast receivers for service and device discovery
  @Override
  public void onResume() {
    super.onResume();
    mDeviceDiscoveredReceiver = new DeviceDiscoveredReceiver();
    addReceiver(mDeviceDiscoveredReceiver, DeviceService.ACTION_DEVICE_DISCOVERED);
    mScanStopReceiver = new ScanStopReceiver();
    addReceiver(mScanStopReceiver, DeviceService.ACTION_STOP_DEVICE_SCAN);
  }
  
  @Override
  public void onDestroy() {
    super.onDestroy();
    unbindService(mConnection);
  }
  
  protected void addReceiver(BroadcastReceiver receiver, String action) {
    IntentFilter filter = new IntentFilter();
    filter.addAction(action);
    registerReceiver(receiver, filter);
  }
  
  @Override
  public void onPause() {
    super.onPause();
    unregisterReceiver(mDeviceDiscoveredReceiver);
    unregisterReceiver(mScanStopReceiver);
  }
  
  private void initializeDeviceService() {
      mConnection = new DeviceServiceConnection();
      Intent i = new Intent(this, DeviceService.class);
      boolean ret = bindService(i, mConnection, Context.BIND_AUTO_CREATE);
      Log.d(TAG, "initService() bound with " + ret);
  }

  // interface to make requests from the device service. data is returned via broadcast receivers.
    private class DeviceServiceConnection implements ServiceConnection {

        public void onServiceConnected(ComponentName name, IBinder boundService) {
            mService = IDeviceCommand.Stub.asInterface((IBinder) boundService);
            Log.d(TAG, "onServiceConnected() connected");
            
            // set up the click listener to enable the scan
            final Button scanButton = (Button) findViewById(R.id.scan_button);
            scanButton.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
          if (mfScanning) {
            stopScan();
          } else {
            scanDevices();  
          }
        }
            });
        }
            
        public void onServiceDisconnected(ComponentName name) {
            mService = null;
            Log.d(TAG, "onServiceDisconnected() disconnected");
        }
    }

    // scan with a predetermined timeout
    public void scanDevices() {
      LinearLayout deviceContainer = (LinearLayout) findViewById(R.id.device_container);
      deviceContainer.removeAllViews();
      Button scanButton = (Button) findViewById(R.id.scan_button);
    scanButton.setText(R.string.stop_device_scan);
    mfScanning = true;
      try {
          SharedPreferences settings = getSharedPreferences(PREFS, 0);
          int scanTimeoutSeconds = settings.getInt(SCAN_TIMEOUT, SCAN_TIMEOUT_DEFAULT_SEC);
          mService.scanDevices(null, scanTimeoutSeconds*1000);
      } catch (RemoteException rex) {
              rex.printStackTrace();
      }
  }
    
    public void stopScan() {
      Button scanButton = (Button) findViewById(R.id.scan_button);
    scanButton.setText(R.string.scan_devices);
    mfScanning = false;
    try {
      mService.stopDeviceScan();
    } catch (RemoteException rex) {
      rex.printStackTrace();
    }
    }
     
    // when the device has been discovered, add a layout showing the device name and UUID.  Save the
    // device in the layout, so when we click on it, we can examine the services that the device advertised.
    public class DeviceDiscoveredReceiver extends com.ratio.deviceService.receivers.DeviceDiscoveredRecevier {
      
      
      @Override 
      public void onDeviceDiscovered(BluetoothDevice device) {
          Log.d(TAG, "DeviceDiscoveredReceiver address = " + device.getAddress());
          View deviceLayout = getLayoutInflater().inflate(R.layout.device_layout, null);
          deviceLayout.setTag(device);
             TextView deviceNameText = (TextView) deviceLayout.findViewById(R.id.device_name);
             String deviceName = device.getName();
          if (deviceName == null) {
            deviceNameText.setText(R.string.no_name);
          } else {
            deviceNameText.setText(deviceName);
          }
          TextView deviceAddrText = (TextView) deviceLayout.findViewById(R.id.device_address);
          deviceAddrText.setText(device.getAddress().toString());
          deviceLayout.setOnClickListener(new DeviceClickListener());
          LinearLayout deviceContainer = (LinearLayout) findViewById(R.id.device_container);
          deviceContainer.addView(deviceLayout);
        }

   }
    
    // launch the activity to query services.
    public class DeviceClickListener implements View.OnClickListener {

    @Override
    public void onClick(View v) {
      stopScan();
      BluetoothDevice device = (BluetoothDevice) v.getTag();
      Intent servicesActivityIntent = new Intent(ScanActivity.this, ServicesActivity.class);
      servicesActivityIntent.putExtra(EXTRA_DEVICE, device);
      startActivity(servicesActivityIntent);
    }
      
    }
    
    // when the scanning has been stopped, update the scan button
   public class ScanStopReceiver extends BroadcastReceiver {
      
        @Override
        public void onReceive(Context context, Intent intent) {
            Button scanButton = (Button) findViewById(R.id.scan_button);
      scanButton.setText(R.string.scan_devices);
      mfScanning = false;
        }
   }
}

Java Source Code List

• Back to Hardware/service  ↑