豆浆机改装记(4): Android BLE 编码正式入门

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欢迎留言！^_^

因为上班路远，业余时间比较少。只能趁回家的时间赶紧，写写代码，排排BUG。然后媳妇儿晚上 下班回家了，就CUT 暂停，待第二天继续。

先贴上最基本的代码，能够搜索到周边的BLE设备，然后打印相应的信息。

总共6步，配有注释，其实和前面文章所述差不多，只不过我简化并且验证过了。

附上源码包：链接：http://pan.baidu.com/s/1c0kDqI8 密码：ssqg

package com.luo.ble;import java.util.ArrayList;import java.util.List;import android.app.Activity;import android.app.ActionBar;import android.app.Fragment;import android.bluetooth.BluetoothAdapter;import android.bluetooth.BluetoothDevice;import android.bluetooth.BluetoothManager;import android.content.Context;import android.os.Bundle;import android.os.Handler;import android.util.Log;import android.view.LayoutInflater;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.View.OnClickListener;import android.view.ViewGroup;import android.widget.Button;import android.os.Build;public class MainActivity extends Activity {private final static String TAG = "GetBle";private BluetoothManager mBluetoothManager;private BluetoothAdapter mBluetoothAdapter;private List<BleDevice> mListBleDevices;private Button mButton;private boolean mScanning;private Handler mHandler;// Stops scanning after 10 secondsprivate final static int SCAN_PERIOD = 10000;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.fragment_main);mHandler = new Handler();Log.i(TAG, "init start");//1. init BLE device listmListBleDevices = new ArrayList<BleDevice>();//2. get BluetoothAdapterInitBle();Log.i(TAG, "init end");//3. set Button OnClick Processing functionmButton = (Button) findViewById(R.id.scan);mButton.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubLog.i(TAG, "onClick start");//4. when you touch this button, then starting scan BLE devicescanBleDevice(true);Log.i(TAG, "onClick end");}});}public boolean InitBle() {Log.i(TAG, "get mBluetoothManager");// get a Adapter through BluetoothManagermBluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);if (null == mBluetoothManager) {Log.e(TAG, "null == mBluetoothManager");return false;}Log.i(TAG, "get mBluetoothAdapter");mBluetoothAdapter = mBluetoothManager.getAdapter();if (null == mBluetoothAdapter) {Log.e(TAG, "null == mBluetoothAdapter");return false;}//if Bluetooth is power off, then power on it.Log.i(TAG, "mBluetoothAdapter enable");if (!mBluetoothAdapter.isEnabled()) {Log.i(TAG, "has enable mBluetoothAdapter");mBluetoothAdapter.enable();}Log.i(TAG, "InitBle end");return true;}public void scanBleDevice(final boolean enable) {Log.i(TAG, "scanBleDevice start");if (enable) {// stops scanning after a pre-defined scan periodmHandler.postDelayed(new Runnable() {@Overridepublic void run() {// TODO Auto-generated method stubLog.i(TAG, "stopLeScan");setScanning(false);mBluetoothAdapter.stopLeScan(mLeScanCallback);}}, SCAN_PERIOD);Log.i(TAG, "startLeScan");setScanning(true);//5. start scan, with a scan callback function mBluetoothAdapter.startLeScan(mLeScanCallback);} else {Log.i(TAG, "stopLeScan");setScanning(false);mBluetoothAdapter.stopLeScan(mLeScanCallback);}Log.i(TAG, "scanBleDevice end");}public boolean isScanning() {return mScanning;}public void setScanning(boolean mScanning) {this.mScanning = mScanning;}private BluetoothAdapter.LeScanCallback mLeScanCallback = new BluetoothAdapter.LeScanCallback() {@Overridepublic void onLeScan(final BluetoothDevice bleDevice, final int rssi, final byte[] scanRecord) {// TODO Auto-generated method stubrunOnUiThread(new Runnable() {@Overridepublic void run() {// TODO Auto-generated method stub/*6. if there are BLE devices around, program will come to here to execute this callback function.we can print device's name/rssi/scanRecord.then I put it into a list, and I will process it in my mHandler.handleMessage later.*/Log.i(TAG, "callback " + bleDevice.getName() + " rssi = " + rssi + " scanRecord" + String.valueOf(scanRecord));printHexString(scanRecord);// 扫描回调函数将扫描到的远端BLE设备添加入设备列表mListBleDevices.add(new BleDevice(bleDevice, rssi, scanRecord));}});}};public static void printHexString( byte[] b) {     for (int i = 0; i < b.length; i++) {      String hex = Integer.toHexString(b[i] & 0xFF);      if (hex.length() == 1) {        hex = '0' + hex;      }      Log.i(TAG, hex.toUpperCase() );    } }}