Android Open Source - BLETest Main Activity

• Back to Hardware/bluetooth  ↑

From Project

Back to project page BLETest.

License

The source code is released under:

MIT License

Java Source Code

package com.binovsky.bletest;
//from w w w  .  ja  v  a 2s . c  o  m
import android.app.Activity;
import android.app.AlertDialog;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothAdapter.LeScanCallback;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothManager;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.Button;

public class MainActivity extends Activity
{
  private final static int  INTENT_ID_REQUEST_ENABLE_BT  = 1;
  private final static int  INTENT_ID_DISCOVERABLE    = 2;
  private final static int  DISCOVERABLE_TIMEINTERVAL  = 999;

  private Handler        mHandler;
  private LeDeviceListAdapter  mLeDeviceListAdapter;
  private final Context    context            = this;

  private BluetoothAdapter  mBluetoothAdapter;
  private Button        btn;

  /**
   * @return the mBluetoothAdapter
   */
  public BluetoothAdapter getMBluetoothAdapter( )
  {
    return mBluetoothAdapter;
  }

  /**
   * @param mBluetoothAdapter
   *            the mBluetoothAdapter to set
   */
  public void setMBluetoothAdapter( BluetoothAdapter mBluetoothAdapter )
  {
    this.mBluetoothAdapter = mBluetoothAdapter;
  }

  /**
   * @return the btn
   */
  public Button getBtn( )
  {
    return btn;
  }

  /**
   * @param btn
   *            the btn to set
   */
  public void setBtn( Button btn )
  {
    this.btn = btn;
  }

  @Override
  protected void onCreate( Bundle savedInstanceState )
  {
    super.onCreate( savedInstanceState );
    setContentView( R.layout.activity_main );
  }

  @Override
  public boolean onCreateOptionsMenu( Menu menu )
  {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater( ).inflate( R.menu.main, menu );
    return true;
  }

  public void runBeacon( View view )
  {
    final BluetoothManager bluetoothManager = (BluetoothManager) getSystemService( Context.BLUETOOTH_SERVICE );
    setMBluetoothAdapter( bluetoothManager.getAdapter( ) );

    setBtn( (Button) findViewById( R.id.run_beacon ) );

    if ( getBtn( ) == null )
      showFatalAlert( );

    if ( !getMBluetoothAdapter( ).isEnabled( ) )
    {
      Intent enableBtIntent = new Intent(
          BluetoothAdapter.ACTION_REQUEST_ENABLE );
      startActivityForResult( enableBtIntent, INTENT_ID_REQUEST_ENABLE_BT );
      btn.setText( R.string.stop_beacon );
    }
    else
    {
      getMBluetoothAdapter( ).stopLeScan( lescanCallback );
      getMBluetoothAdapter( ).disable( );
      btn.setText( R.string.run_beacon );
    }
  }

  protected void onActivityResult( int requestCode, int resultCode,
      Intent data )
  {
    if ( requestCode == INTENT_ID_DISCOVERABLE )
    {
      if ( resultCode == RESULT_CANCELED )
      {
        getMBluetoothAdapter( ).disable( );
        btn.setText( R.string.run_beacon );

        return;
      }
      mHandler = new Handler( );
      mHandler.postDelayed( new Runnable( )
      {
        @Override
        public void run( )
        {
          getMBluetoothAdapter( ).stopLeScan( lescanCallback );
          getMBluetoothAdapter( ).disable( );
          btn.setText( R.string.run_beacon );
        }
      }, DISCOVERABLE_TIMEINTERVAL );

      if ( !getMBluetoothAdapter( ).startLeScan( lescanCallback ) )
      {
        showNoBLEAlert( );
        getMBluetoothAdapter( ).stopLeScan( lescanCallback );
        getMBluetoothAdapter( ).disable( );
        btn.setText( R.string.run_beacon );
      }
    }
    else if ( requestCode == INTENT_ID_REQUEST_ENABLE_BT )
    {
      if ( resultCode == RESULT_CANCELED )
      {
        getMBluetoothAdapter( ).disable( );
        btn.setText( R.string.run_beacon );

        return;
      }

      Intent discoverableIntent = new Intent(
          BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE );
      discoverableIntent.putExtra(
          BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION,
          DISCOVERABLE_TIMEINTERVAL );
      startActivityForResult( discoverableIntent, INTENT_ID_DISCOVERABLE );
    }
    else if ( resultCode == RESULT_CANCELED )
    {
      getMBluetoothAdapter( ).stopLeScan( lescanCallback );
      btn.setText( R.string.run_beacon );
    }
  }

  private void showFatalAlert( )
  {
    AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(
        context );

    // set title
    alertDialogBuilder.setTitle( "Fatal Error" );

    // set dialog message
    alertDialogBuilder.setMessage( "Fatal error, application will exit!" )
        .setCancelable( false )
        .setPositiveButton( "OK", new DialogInterface.OnClickListener( )
        {
          public void onClick( DialogInterface dialog, int id )
          {
            MainActivity.this.finish( );
          }
        } );

    // create alert dialog
    AlertDialog alertDialog = alertDialogBuilder.create( );

    // show it
    alertDialog.show( );
  }

  private void showNoBLEAlert( )
  {
    AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(
        context );

    // set title
    alertDialogBuilder.setTitle( "Error" );

    // set dialog message
    alertDialogBuilder
        .setMessage(
            "NO Smart Bluetooth adapter presented in your device!" )
        .setCancelable( false )
        .setPositiveButton( "OK", new DialogInterface.OnClickListener( )
        {
          public void onClick( DialogInterface dialog, int id )
          {
            getMBluetoothAdapter( ).stopLeScan( lescanCallback );
            getMBluetoothAdapter( ).disable( );
            btn.setText( R.string.run_beacon );
          }
        } );

    // create alert dialog
    AlertDialog alertDialog = alertDialogBuilder.create( );

    // show it
    alertDialog.show( );
  }

  private LeScanCallback  lescanCallback  = new LeScanCallback( )
                      {
                        @Override
                        public void onLeScan(
                            BluetoothDevice device,
                            int rssi,
                            byte[] scanRecord )
                        {
                          mLeDeviceListAdapter
                              .addDevice( device );
                          mLeDeviceListAdapter
                              .notifyDataSetChanged( );

                          Log.v( context
                              .getString( R.string.TAG_DEVICES ),
                              device.getName( )
                                  + " "
                                  + rssi );
                        }
                      };
}

Java Source Code List

• Back to Hardware/bluetooth  ↑