android蓝牙列表配对设备的例子

BluetoothAdapter类的getBoundedDevices（）方法提供了一个包含所有配对或绑定的蓝牙设备的列表的集合。

在此示例中，我们正在检查蓝牙是否已关闭，如果是，则将其打开并列出所有配对的设备。

activity_main.xml

从面板上拖动一个textview，现在activity_main.xml文件将如下所示：

<RelativeLayout xmlns:androclass="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginLeft="18dp"
        android:layout_marginTop="61dp"
        android:text="Showing Paired Devices:" />

</RelativeLayout>

提供权限

你需要在AndroidManifest.xml文件中提供以下权限。

<uses-permission android:name="android.permission.BLUETOOTH" />
    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />

AndroidManifest.xml文件的完整代码如下。

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:androclass="http://schemas.android.com/apk/res/android"
    package="com.example.bluetoothshowpaired"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <uses-permission android:name="android.permission.BLUETOOTH" />
    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
    
    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.bluetoothshowpaired.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

活动类

让我们编写代码以提供配对（有界）蓝牙设备的列表。

package com.example.bluetoothshowpaired;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import java.util.Set;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.Intent;
import android.widget.TextView;
 
public class MainActivity extends Activity {
	  TextView textview1;
	  private static final int REQUEST_ENABLE_BT = 1;
	  BluetoothAdapter btAdapter; 
	 
	  /** Called when the activity is first created. */
	  @Override
	  public void onCreate(Bundle savedInstanceState) {
	    super.onCreate(savedInstanceState);
	    setContentView(R.layout.activity_main);
	 
	    textview1 = (TextView) findViewById(R.id.textView1);
	     
	    // Getting the Bluetooth adapter
	    btAdapter = BluetoothAdapter.getDefaultAdapter();
	    textview1.append("\nAdapter: " + btAdapter);
	     
	    CheckBluetoothState();
	  }
	     
	  /* It is called when an activity completes.*/
	  @Override
	  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
	    super.onActivityResult(requestCode, resultCode, data);
	    if (requestCode == REQUEST_ENABLE_BT) {
	      CheckBluetoothState();
	    }
	  }
	 
	  @Override
	  protected void onDestroy() {
	    super.onDestroy();
	  }
	 
	  private void CheckBluetoothState() {
	    // Checks for the Bluetooth support and then makes sure it is turned on
	    // If it isn't turned on, request to turn it on
	    // List paired devices
	    if(btAdapter==null) { 
	      textview1.append("\nBluetooth NOT supported. Aborting.");
	      return;
	    } else {
	      if (btAdapter.isEnabled()) {
	        textview1.append("\nBluetooth is enabled...");
	         
	        // Listing paired devices
	        textview1.append("\nPaired Devices are:");
	        Set<BluetoothDevice> devices = btAdapter.getBondedDevices();
	        for (BluetoothDevice device : devices) {
	          textview1.append("\n  Device: " + device.getName() + ", " + device);
	        }
	      } else {
	        //Prompt user to turn on Bluetooth
	        Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
	        startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
	      }
	    }
	  }
	     

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.activity_main, menu);
		return true;
	}

}

你需要在真实设备（例如移动设备）上运行它以测试应用程序。