android蓝牙列表配对设备的例子 android蓝牙配对设备|Android

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【android蓝牙列表配对设备的例子】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("\nDevice: " + 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; }}