Android Open Source - accessory-samples Advertiser Activity

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License

The source code is released under:

Copyright (c) 2012 Wireless Designs, LLC Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in ...

Java Source Code

package com.example.android.bluetoothadvertiser;
//from  w  w w .j  av  a2  s.co m
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothManager;
import android.bluetooth.le.AdvertiseCallback;
import android.bluetooth.le.AdvertiseData;
import android.bluetooth.le.AdvertiseSettings;
import android.bluetooth.le.BluetoothLeAdvertiser;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.os.ParcelUuid;
import android.util.Log;
import android.view.View;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast;

/**
 * Dave Smith
 * Date: 11/12/14
 * AdvertiserActivity
 */
public class AdvertiserActivity extends Activity implements SeekBar.OnSeekBarChangeListener {
    private static final String TAG = "AdvertiseActivity";
    private static final int DEFAULT_VALUE = 20;

    /* Full Bluetooth UUID that defines the Health Thermometer Service */
    public static final ParcelUuid THERM_SERVICE = ParcelUuid.fromString("00001809-0000-1000-8000-00805f9b34fb");

    private BluetoothAdapter mBluetoothAdapter;
    private BluetoothLeAdvertiser mBluetoothLeAdvertiser;

    /* UI to control advertise value */
    private TextView mCurrentValue;
    private SeekBar mSlider;

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

        mCurrentValue = (TextView) findViewById(R.id.current);
        mSlider = (SeekBar) findViewById(R.id.slider);

        mSlider.setMax(100);
        mSlider.setOnSeekBarChangeListener(this);
        mSlider.setProgress(DEFAULT_VALUE);

        /*
         * Bluetooth in Android 4.3+ is accessed via the BluetoothManager, rather than
         * the old static BluetoothAdapter.getInstance()
         */
        BluetoothManager manager = (BluetoothManager) getSystemService(BLUETOOTH_SERVICE);
        mBluetoothAdapter = manager.getAdapter();
        mBluetoothLeAdvertiser = mBluetoothAdapter.getBluetoothLeAdvertiser();
    }

    @Override
    protected void onResume() {
        super.onResume();
        /*
         * We need to enforce that Bluetooth is first enabled, and take the
         * user to settings to enable it if they have not done so.
         */
        if (mBluetoothAdapter == null || !mBluetoothAdapter.isEnabled()) {
            //Bluetooth is disabled
            Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
            startActivity(enableBtIntent);
            finish();
            return;
        }

        /*
         * Check for Bluetooth LE Support.  In production, our manifest entry will keep this
         * from installing on these devices, but this will allow test devices or other
         * sideloads to report whether or not the feature exists.
         */
        if (!getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE)) {
            Toast.makeText(this, "No LE Support.", Toast.LENGTH_SHORT).show();
            finish();
            return;
        }

        /*
         * Check for advertising support. Not all devices are enabled to advertise
         * Bluetooth LE data.
         */
        if (!mBluetoothAdapter.isMultipleAdvertisementSupported()) {
            Toast.makeText(this, "No Advertising Support.", Toast.LENGTH_SHORT).show();
            finish();
            return;
        }

        startAdvertising();
    }

    @Override
    protected void onPause() {
        super.onPause();
        stopAdvertising();
    }

    private void startAdvertising() {
        if (mBluetoothLeAdvertiser == null) return;

        AdvertiseSettings settings = new AdvertiseSettings.Builder()
                .setAdvertiseMode(AdvertiseSettings.ADVERTISE_MODE_BALANCED)
                .setConnectable(false)
                .setTimeout(0)
                .setTxPowerLevel(AdvertiseSettings.ADVERTISE_TX_POWER_MEDIUM)
                .build();

        AdvertiseData data = new AdvertiseData.Builder()
                .setIncludeDeviceName(true)
                .setIncludeTxPowerLevel(true)
                .addServiceUuid(THERM_SERVICE)
                .addServiceData(THERM_SERVICE, buildTempPacket())
                .build();

        mBluetoothLeAdvertiser.startAdvertising(settings, data, mAdvertiseCallback);
    }

    private void stopAdvertising() {
        if (mBluetoothLeAdvertiser == null) return;

        mBluetoothLeAdvertiser.stopAdvertising(mAdvertiseCallback);
    }

    private void restartAdvertising() {
        stopAdvertising();
        startAdvertising();
    }

    private byte[] buildTempPacket() {
        int value;
        try {
            value = Integer.parseInt(mCurrentValue.getText().toString());
        } catch (NumberFormatException e) {
            value = 0;
        }

        return new byte[] {(byte)value, 0x00};
    }

    private AdvertiseCallback mAdvertiseCallback = new AdvertiseCallback() {
        @Override
        public void onStartSuccess(AdvertiseSettings settingsInEffect) {
            Log.i(TAG, "LE Advertise Started.");
        }

        @Override
        public void onStartFailure(int errorCode) {
            Log.w(TAG, "LE Advertise Failed: "+errorCode);
        }
    };

    /** Click handler to update advertisement data */

    public void onUpdateClick(View v) {
        restartAdvertising();
    }

    /** Callbacks to update UI when slider changes */

    @Override
    public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
        mCurrentValue.setText(String.valueOf(progress));
    }

    @Override
    public void onStartTrackingTouch(SeekBar seekBar) {

    }

    @Override
    public void onStopTrackingTouch(SeekBar seekBar) {

    }
}

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