近期項目中需要連接藍牙設備，起初只是設置藍牙列表界面讓用戶點擊然后輸入默認PIN碼，后來改需求了 = = ，要求自動連接指定設備并不需要用戶手動輸入PIN碼，作為Android 小白的我是拒絕的，但是拒絕有什么用~
首先說一下之后會用到的關于藍牙方面的東西：
1.斷開已配對設備
最后在項目中發現沒有用。這里就先記錄一下。
//得到配對的設備列表，清除已配對的設備 public void removePairDevice() { if (mBluetoothAdapter != null) { //mBluetoothAdapter初始化方式 mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); //這個就是獲取已配對藍牙列表的方法 Set<BluetoothDevice> bondedDevices = mBluetoothAdapter.getBondedDevices(); for (BluetoothDevice device : bondedDevices) { //這里可以通過device.getName() device.getAddress()來判斷是否是自己需要斷開的設備 unpairDevice(device); } } } //反射來調用BluetoothDevice.removeBond取消設備的配對 private void unpairDevice(BluetoothDevice device) { try { Method m = device.getClass().getMethod("removeBond", (Class[]) null); m.invoke(device, (Object[]) null); } catch (Exception e) { Log.e("mate", e.getMessage()); } }2.搜索附近藍牙
首先我們需要注冊兩個廣播，第一個為正在搜索時的，第二個為搜索完成的。
// Register for broadcasts when a device is discovered IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND); this.registerReceiver(mFindBlueToothReceiver, filter); // Register for broadcasts when discovery has finished filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED); this.registerReceiver(mFindBlueToothReceiver, filter); //需要時開始搜索 if (mBluetoothAdapter.isDiscovering()) { mBluetoothAdapter.cancelDiscovery(); } mBluetoothAdapter.startDiscovery();然后對廣播進行處理。這里要說明一下ClsUtils.createBond()這個方法如果連接設備SDK中有配對的方法，建議把這個方法去掉，我這里是去掉的，加上的話偶爾會Toast出無法配對。
private final BroadcastReceiver mFindBlueToothReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { String action = intent.getAction(); // When discovery finds a device if (BluetoothDevice.ACTION_FOUND.equals(action)) { //TODO 開始搜索 BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); // if (device.getBondState() != BluetoothDevice.BOND_BONDED) {//判斷藍牙狀態，是否是已配對 //TODO 可以在這判斷名字 如果搜索結束后沒有，再到已配對中尋找 String BTName[] = device.getName().split("-"); if (BTName[0].equals("xxx")) { //在這連接設備 一般需要藍牙地址 device.getAddress(); try { ClsUtils.createBond(device.getClass(), device); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } // } } else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) { //TODO 搜索結束 Toast.makeText(context, "搜索結束",Toast.LENGTH_SHORT).show(); } } };這里在Activity結束時記得取消注冊和取消搜索
unregisterReceiver(mFindBlueToothReceiver); if (mBluetoothAdapter != null) { mBluetoothAdapter.cancelDiscovery(); }3.攔截用戶交互頁面
通過廣播可以監聽到輸入PIN碼的那個頁面將要彈出
<receiver android:name=".BluetoothConnectActivityReceiver" > <intent-filter android:priority="1000"> <action android:name="android.bluetooth.device.action.PAIRING_REQUEST" /> </intent-filter> </receiver>
廣播中需要做的事情，注意一定要調用abortBroadcast()，不然交互頁面還是會出現一下然后消失。就是這個方法找了一天（╯‵□′）╯︵┴─┴。。。
public class BluetoothConnectActivityReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { if (intent.getAction().equals("android.bluetooth.device.action.PAIRING_REQUEST")) { BluetoothDevice mBluetoothDevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); try { //(三星)4.3版本測試手機還是會彈出用戶交互頁面(閃一下)，如果不注釋掉下面這句頁面不會取消但可以配對成功。(中興，魅族4(Flyme 6))5.1版本手機兩中情況下都正常 //ClsUtils.setPairingConfirmation(mBluetoothDevice.getClass(), mBluetoothDevice, true); abortBroadcast();//如果沒有將廣播終止，則會出現一個一閃而過的配對框。 //3.調用setPin方法進行配對... boolean ret = ClsUtils.setPin(mBluetoothDevice.getClass(), mBluetoothDevice, "你需要設置的PIN碼"); } catch (Exception e) { e.printStackTrace(); } } }}然后只要在搜索到自己需要的設備后連接進行操作就可以了！！！一定要記得加權限~
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" /> <uses-permission android:name="android.permission.BLUETOOTH" />
在Android6.0之后還需要一個模糊定位的權限
最后把ClsUtils類奉上，網上有很多的。
/**************** 藍牙配對函數 ***************/import java.lang.reflect.Field;import java.lang.reflect.Method;import android.bluetooth.BluetoothDevice;import android.util.Log;public class ClsUtils { /** * 與設備配對 參考源碼：platform/packages/apps/Settings.git * /Settings/src/com/android/settings/bluetooth/CachedBluetoothDevice.java */ static public boolean createBond(Class btClass, BluetoothDevice btDevice) throws Exception { Method createBondMethod = btClass.getMethod("createBond"); Boolean returnValue = (Boolean) createBondMethod.invoke(btDevice); return returnValue.booleanValue(); } /** * 與設備解除配對 參考源碼：platform/packages/apps/Settings.git * /Settings/src/com/android/settings/bluetooth/CachedBluetoothDevice.java */ static public boolean removeBond(Class<?> btClass, BluetoothDevice btDevice) throws Exception { Method removeBondMethod = btClass.getMethod("removeBond"); Boolean returnValue = (Boolean) removeBondMethod.invoke(btDevice); return returnValue.booleanValue(); } static public boolean setPin(Class<? extends BluetoothDevice> btClass, BluetoothDevice btDevice, String str) throws Exception { try { Method removeBondMethod = btClass.getDeclaredMethod("setPin", new Class[]{byte[].class}); Boolean returnValue = (Boolean) removeBondMethod.invoke(btDevice, new Object[] {str.getBytes()}); Log.e("returnValue", "" + returnValue); } catch (SecurityException e) { // throw new RuntimeException(e.getMessage()); e.printStackTrace(); } catch (IllegalArgumentException e) { // throw new RuntimeException(e.getMessage()); e.printStackTrace(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } return true; } // 取消用戶輸入 static public boolean cancelPairingUserInput(Class<?> btClass, BluetoothDevice device) throws Exception { Method createBondMethod = btClass.getMethod("cancelPairingUserInput");// cancelBondProcess(btClass, device); Boolean returnValue = (Boolean) createBondMethod.invoke(device); return returnValue.booleanValue(); } // 取消配對 static public boolean cancelBondProcess(Class<?> btClass, BluetoothDevice device) throws Exception { Method createBondMethod = btClass.getMethod("cancelBondProcess"); Boolean returnValue = (Boolean) createBondMethod.invoke(device); return returnValue.booleanValue(); } //確認配對 static public void setPairingConfirmation(Class<?> btClass, BluetoothDevice device, boolean isConfirm) throws Exception { Method setPairingConfirmation = btClass.getDeclaredMethod("setPairingConfirmation", boolean.class); setPairingConfirmation.invoke(device, isConfirm); } /** * * @param clsShow */ static public void printAllInform(Class clsShow) { try { // 取得所有方法 Method[] hideMethod = clsShow.getMethods(); int i = 0; for (; i < hideMethod.length; i++) { Log.e("method name", hideMethod[i].getName() + ";and the i is:"+ i); } // 取得所有常量 Field[] allFields = clsShow.getFields(); for (i = 0; i < allFields.length; i++) { Log.e("Field name", allFields[i].getName()); } } catch (SecurityException e) { // throw new RuntimeException(e.getMessage()); e.printStackTrace(); } catch (IllegalArgumentException e) { // throw new RuntimeException(e.getMessage()); e.printStackTrace(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } }}以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持VEVB武林網。
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