| | | 周边蓝牙强弱搜索/src/com/example/bt_dir/MainActivity.java+packagecom.example.bt_dir; |
| | | + |
| | | +importjava.util.Vector; |
| | | + |
| | | +importandroid.support.v7.app.ActionBarActivity; |
| | | +importandroid.bluetooth.BluetoothAdapter; |
| | | +importandroid.bluetooth.BluetoothDevice; |
| | | +importandroid.content.BroadcastReceiver; |
| | | +importandroid.content.Context; |
| | | +importandroid.content.Intent; |
| | | +importandroid.content.IntentFilter; |
| | | +importandroid.graphics.Canvas; |
| | | +importandroid.graphics.Color; |
| | | +importandroid.graphics.Paint; |
| | | +importandroid.graphics.Paint.Style; |
| | | +importandroid.os.Bundle; |
| | | +importandroid.os.Handler; |
| | | +importandroid.os.Message; |
| | | +importandroid.util.Log; |
| | | +importandroid.view.Menu; |
| | | +importandroid.view.MenuItem; |
| | | +importandroid.view.SurfaceHolder; |
| | | +importandroid.view.SurfaceHolder.Callback; |
| | | +importandroid.view.SurfaceView; |
| | | + |
| | | +publicclass MainActivity extendsActionBarActivity implements Callback { |
| | | + |
| | | +private SurfaceView mSurface; |
| | | +private SurfaceHolder mHolder; |
| | | +private BluetoothAdapter mBtAdapter; |
| | | +//private Message msg ; |
| | | +//private Bundle bundle; |
| | | + |
| | | +private Vector<String> mDevicesVector; |
| | | +private Vector<Short> mRSSIVector; |
| | | +private Vector<Paint> mPaint; |
| | | +//消息句柄(线程里无法进行界面更新，所以要把消息从线程里发送出来在消息句柄里进行处理) |
| | | +public Handler myHandler =new Handler() { |
| | | +@Override |
| | | +public void handleMessage(Messagemsg) |
| | | + { |
| | | +Bundle bundle = msg.getData(); |
| | | +short now = bundle.getShort("msg"); |
| | | +Log.d("onGet",String.valueOf(now)); |
| | | +if (msg.what== 0x01) |
| | | + { |
| | | + draw(); |
| | | + } |
| | | + doDiscovery(); |
| | | + } |
| | | +//画图像 |
| | | +private void draw() { |
| | | +Canvas canvas = mHolder.lockCanvas(); |
| | | + canvas.drawRGB(0,0, 0); |
| | | + |
| | | +for(int i=mRSSIVector.size()-1;i>=0;i--) |
| | | + { |
| | | + canvas.drawText(i+":"+mDevicesVector.get(i),5, i*10+12, mPaint.get(i)); |
| | | + canvas.drawCircle(canvas.getWidth()/2, canvas.getHeight()/2,150+mRSSIVector.get(i), mPaint.get(i)); //画圆圈 |
| | | + } |
| | | + mHolder.unlockCanvasAndPost(canvas);// 更新屏幕显示内容 |
| | | + mRSSIVector.clear(); |
| | | + mDevicesVector.clear(); |
| | | + } |
| | | + }; |
| | | + |
| | | +@Override |
| | | +protected void onCreate(BundlesavedInstanceState) { |
| | | +super.onCreate(savedInstanceState); |
| | | + setContentView(R.layout.activity_main); |
| | | + |
| | | +//msg = new Message();//消息 |
| | | +///bundle = new Bundle(); |
| | | + |
| | | + mDevicesVector=newVector<String>();//向量 |
| | | + mRSSIVector=newVector<Short>(); |
| | | + mPaint=newVector<Paint>(); |
| | | +Paint paint0 = new Paint(); |
| | | + paint0.setAntiAlias(true); |
| | | + paint0.setStyle(Style.STROKE); |
| | | + paint0.setColor(Color.RED); |
| | | + mPaint.add(paint0); |
| | | +Paint paint1 = new Paint(); |
| | | + paint1.setAntiAlias(true); |
| | | + paint1.setStyle(Style.STROKE); |
| | | + paint1.setColor(Color.GREEN); |
| | | + mPaint.add(paint1); |
| | | +Paint paint2 = new Paint(); |
| | | + paint2.setAntiAlias(true); |
| | | + paint2.setStyle(Style.STROKE); |
| | | + paint2.setColor(Color.BLUE); |
| | | + mPaint.add(paint2); |
| | | +Paint paint3 = new Paint(); |
| | | + paint3.setAntiAlias(true); |
| | | + paint3.setStyle(Style.STROKE); |
| | | + paint3.setColor(Color.YELLOW); |
| | | + mPaint.add(paint3); |
| | | +Paint paint4 = new Paint(); |
| | | + paint4.setAntiAlias(true); |
| | | + paint4.setStyle(Style.STROKE); |
| | | + paint4.setColor(Color.WHITE); |
| | | + mPaint.add(paint4); |
| | | +Paint paint5 = new Paint(); |
| | | + paint5.setAntiAlias(true); |
| | | + paint5.setStyle(Style.STROKE); |
| | | + paint5.setColor(Color.LTGRAY); |
| | | + mPaint.add(paint5); |
| | | +Paint paint6 = new Paint(); |
| | | + paint6.setAntiAlias(true); |
| | | + paint6.setStyle(Style.STROKE); |
| | | + paint6.setColor(Color.CYAN); |
| | | + mPaint.add(paint6); |
| | | + |
| | | + mSurface=(SurfaceView)findViewById(R.id.surface); |
| | | + mHolder= mSurface.getHolder(); |
| | | + mHolder.addCallback(this); |
| | | + |
| | | +// Register for broadcasts when a device is discovered |
| | | +IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND); |
| | | +this.registerReceiver(mReceiver, filter); |
| | | +// Register for broadcasts when discovery has finished |
| | | + filter= new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED); |
| | | +this.registerReceiver(mReceiver, filter); |
| | | + |
| | | +// Get the local Bluetooth adapter |
| | | + mBtAdapter= BluetoothAdapter.getDefaultAdapter(); |
| | | + } |
| | | + |
| | | +// Start device discover with the BluetoothAdapter |
| | | +private void doDiscovery() { |
| | | +// Indicate scanning in the title |
| | | + setProgressBarIndeterminateVisibility(true); |
| | | + |
| | | +// If we're already discovering, stop it |
| | | +if (mBtAdapter.isDiscovering()) { |
| | | + mBtAdapter.cancelDiscovery(); |
| | | + } |
| | | +// Request discover from BluetoothAdapter |
| | | + mBtAdapter.startDiscovery(); |
| | | + } |
| | | + |
| | | +// The BroadcastReceiver that listens for discovered devices and |
| | | +// changes the title when discovery is finished |
| | | +//【查找蓝牙设备】 |
| | | +private final BroadcastReceiver mReceiver = new BroadcastReceiver() { |
| | | +@Override |
| | | +public void onReceive(Contextcontext, Intent intent) { |
| | | +Log.d("onReceive","OK"); |
| | | +String action = intent.getAction(); |
| | | +// When discovery finds a device |
| | | +if (BluetoothDevice.ACTION_FOUND.equals(action)) { |
| | | +// Get the BluetoothDevice object from the Intent |
| | | +BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); |
| | | + mDevicesVector.add(device.getName()+ "\n"+ device.getAddress()); |
| | | +short rssi = intent.getExtras().getShort(BluetoothDevice.EXTRA_RSSI); |
| | | + mRSSIVector.add(rssi); |
| | | +Log.d("RSSI",device.getName()+""+String.valueOf(rssi)); |
| | | +// When discovery is finished, change the Activity title |
| | | + }else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) { |
| | | + setProgressBarIndeterminateVisibility(false); |
| | | +if (mDevicesVector.size()!= 0) { |
| | | +Message msg = new Message();//消息 |
| | | +Bundle bundle = new Bundle(); |
| | | + bundle.clear();Log.d("onReceive","1"); |
| | | + msg.what= 0x01;//消息类别 |
| | | + bundle.putShort("msg",(short)0);Log.d("onReceive","2"); |
| | | + msg.setData(bundle);Log.d("onReceive","3"); |
| | | + myHandler.sendMessage(msg);Log.d("onReceive","4"); |
| | | + } |
| | | + } |
| | | + } |
| | | + }; |
| | | + |
| | | +@Override |
| | | +public boolean onCreateOptionsMenu(Menumenu) { |
| | | +// Inflate the menu; this adds items to the action bar if it is present. |
| | | + getMenuInflater().inflate(R.menu.main, menu); |
| | | +return true; |
| | | + } |
| | | + |
| | | +@Override |
| | | +public boolean onOptionsItemSelected(MenuItemitem) { |
| | | +// Handle action bar item clicks here. The action bar will |
| | | +// automatically handle clicks on the Home/Up button, so long |
| | | +// as you specify a parent activity in AndroidManifest.xml. |
| | | +int id = item.getItemId(); |
| | | +if (id == R.id.action_settings) { |
| | | + doDiscovery(); |
| | | +return true; |
| | | + } |
| | | +return false; |
| | | + } |
| | | + |
| | | +@Override |
| | | +public void surfaceCreated(SurfaceHolderholder) { |
| | | +// TODO Auto-generated method stub |
| | | + |
| | | + } |
| | | + |
| | | +@Override |
| | | +public void surfaceChanged(SurfaceHolderholder, int format, int width, |
| | | +int height) { |
| | | +// TODO Auto-generated method stub |
| | | + |
| | | + } |
| | | + |
| | | +@Override |
| | | +public void surfaceDestroyed(SurfaceHolderholder) { |
| | | +// TODO Auto-generated method stub |
| | | + |
| | | + } |
| | | +} |
本应用通过Android系统搜索周边蓝牙设备，并显示设备名称、地址及信号强度(RSSI值)，利用不同颜色区分信号强度等级。
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