搜尋附近的藍牙裝置，並將其名字和mac地址現在在textview中

標籤：broadcastreceiver   mac   intentfilter startdi   

上一篇文章已經寫了如何開啟藍牙裝置，顯示已經配對成功的藍牙裝置，http://blog.csdn.net/liuzuyi200/article/details/37740401

這篇文章主要寫如何搜尋藍牙裝置

（2）搜尋藍牙裝置需要執行startDiscovery()這個方法，這個過程會大約持續12秒。

if (mBluetoothAdapter.isDiscovering()) {              mBluetoothAdapter.cancelDiscovery();          }          // 開始搜尋藍牙裝置,搜尋到的藍牙裝置通過廣播返回          mBluetoothAdapter.startDiscovery();  

要執行這個方法必須註冊一個BroadcastReceiver，屬性BluetoothDevice.ACTION_FOUND的intent 

private final BroadcastReceiver Receiver = new BroadcastReceiver(){     public void onReceive(Context context, Intent intent) {     String action = intent.getAction();     if(BluetoothDevice.ACTION_FOUND.equals(action))     {     BluetoothDevice device =intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);      if (device.getBondState() != BluetoothDevice.BOND_BONDED) {                                    textview1.append(device.getName() + ":"                              + device.getAddress() + "\n\n");                 }            }}};

註冊BroadcastReceiver用下面這句話完成，分別在調用開始和結束時使用
 

IntentFilter Filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);          registerReceiver( Receiver , Filter);               Filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);          registerReceiver( Receiver , Filter);  

如果調用結束，還需要取消註冊

protected void onDestroy() {          // TODO Auto-generated method stub          super.onDestroy();          //解除註冊          unregisterReceiver(Receiver);      } 

下面是開啟藍牙裝置 顯示已經配對的藍牙裝置 ，搜尋附近的藍牙裝置，並將已配對的藍牙裝置顯示在textview中的布局檔案和源碼

activity_main.xml

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:tools="http://schemas.android.com/tools"      android:layout_width="match_parent"    android:layout_height="match_parent"><LinearLayout        android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >    <Button        android:id="@+id/button1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="Button" />    <TextView        android:id="@+id/Textview1"        android:layout_width="150dp"        android:layout_height="wrap_content"        android:layout_weight="1" /></LinearLayout></ScrollView>

MainActivity

package com.liuzuyi.bluetooth;import java.util.Set;import android.app.Activity;import android.bluetooth.BluetoothAdapter;import android.bluetooth.BluetoothDevice;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.os.Bundle;import android.os.Parcelable;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.TextView;import android.widget.Toast;public class MainActivity extends Activity {private static final int REQUEST_ENABLE_BT = 1;private Button button;private TextView textview1;protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);button=(Button)findViewById(R.id.button1);        textview1=(TextView )findViewById(R.id.Textview1);button.setOnClickListener( new blue()); IntentFilter Filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);          registerReceiver( Receiver , Filter);                Filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);          registerReceiver( Receiver , Filter);  }private final BroadcastReceiver Receiver = new BroadcastReceiver(){     public void onReceive(Context context, Intent intent) {     String action = intent.getAction();     if(BluetoothDevice.ACTION_FOUND.equals(action))     {     BluetoothDevice device =intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);      if (device.getBondState() != BluetoothDevice.BOND_BONDED) {                                    textview1.append(device.getName() + ":"                              + device.getAddress() + "\n\n");                 }            }}};protected void onDestroy() {          // TODO Auto-generated method stub          super.onDestroy();          //解除註冊          unregisterReceiver(Receiver);      }  class blue implements OnClickListener{@Overridepublic void onClick(View v) {  BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();if (mBluetoothAdapter == null) {   Toast.makeText(MainActivity.this, "此裝置不支援藍芽傳輸功能！", Toast.LENGTH_SHORT).show();}else{Toast.makeText(MainActivity.this, "此裝置支援藍芽傳輸功能！", Toast.LENGTH_SHORT).show();if (!mBluetoothAdapter.isEnabled()) {  Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);    enableIntent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 300);              startActivityForResult(enableIntent, REQUEST_ENABLE_BT);           Toast.makeText(MainActivity.this, "藍牙裝置已經開啟！", Toast.LENGTH_SHORT).show();                  } if (mBluetoothAdapter.isDiscovering()) {              mBluetoothAdapter.cancelDiscovery();          }          // 開始搜尋藍牙裝置,搜尋到的藍牙裝置通過廣播返回          mBluetoothAdapter.startDiscovery();       Set<BluetoothDevice> pairedDevices=mBluetoothAdapter.getBondedDevices();if(pairedDevices.size() > 0){for (BluetoothDevice bluetoothDevice : pairedDevices) {textview1.append(bluetoothDevice.getName() + ":"                          + bluetoothDevice.getAddress() + "\n\n");}}  }      }}}

說明：點擊按鈕，就會把未配對過的藍牙裝置的名字和mac地址顯示在textview中，如果想顯示所有的藍牙裝置就把onReceive方法中的if語句去掉。