如何获得蓝牙设备列表？
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我正在尝试获取绑定的蓝牙设备，但可以将它作为长字符串而不是列表来获取。
这是我的代码：
BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices();
ArrayList<String> listview =
new ArrayList<String>(Arrays.asList(pairedDevices.toString()));
setListAdapter(new ArrayAdapter<String>(this, R.layout.list, listview));
我得到的是这样的：[00:23:7F:1c, f0:09:f1:b4:b0]。并将其全部集中在一行中。如何将其更改为列表而不是全部显示在一行中？
而且，如何获得设备的友好名称而不是这些数字？
谢谢！
答案
您应按以下方式更改代码：
BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices();
List<String> s = new ArrayList<String>();
for(BluetoothDevice bt : pairedDevices)
s.add(bt.getName());
setListAdapter(new ArrayAdapter<String>(this, R.layout.list, s));
另一答案
[附近的蓝牙设备的查找列表：
查找相同的屏幕截图。
<< img src =“ https://image.soinside.com/eyJ1cmwiOiAiaHR0cHM6Ly9pLnN0YWNrLmltZ3VyLmNvbS9BWmZSaS5wbmcifQ==” alt =“在此处输入图像描述”>
MainActivity.java：
public class MainActivity extends ActionBarActivity {
private ListView listView;
private ArrayList<String> mDeviceList = new ArrayList<String>();
private BluetoothAdapter mBluetoothAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView) findViewById(R.id.listView);
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
mBluetoothAdapter.startDiscovery();
IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
registerReceiver(mReceiver, filter);
}
@Override
protected void onDestroy() {
unregisterReceiver(mReceiver);
super.onDestroy();
}
private final BroadcastReceiver mReceiver = 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);
mDeviceList.add(device.getName() + "
" + device.getAddress());
Log.i("BT", device.getName() + "
" + device.getAddress());
listView.setAdapter(new ArrayAdapter<String>(context,
android.R.layout.simple_list_item_1, mDeviceList));
}
}
};
activity_main.xml：
<RelativeLayout 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"
tools:context="com.example.bluetoothdemo.MainActivity" >
<ListView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/listView"/>
</RelativeLayout>
Manifest文件：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.bluetoothdemo"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<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=".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>
注意：
请确保您向用户请求位置许可并打开GPS。
原因：在Android 6.0中，您需要具有“蓝牙发现”的“位置”权限。
更多参考：
- https://developer.android.com/guide/topics/connectivity/bluetooth
- https://getlief.zendesk.com/hc/en-us/articles/360007600233-Why-does-Android-require-Location-Permissions-for-Bluetooth-
完成
另一答案
我尝试了以下代码，
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
<TextView
android:id="@+id/bluetoothstate"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<Button
android:id="@+id/listpaireddevices"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="List Paired Devices"
android:enabled="false"
/>
<TextView
android:id="@+id/bluetoothstate"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
ListPairedDevicesActivity.java
import java.util.Set;
import android.app.ListActivity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothClass;
import android.bluetooth.BluetoothDevice;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
public class ListPairedDevicesActivity extends ListActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
ArrayAdapter<String> btArrayAdapter
= new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1);
BluetoothAdapter bluetoothAdapter
= BluetoothAdapter.getDefaultAdapter();
Set<BluetoothDevice> pairedDevices
= bluetoothAdapter.getBondedDevices();
if (pairedDevices.size() > 0) {
for (BluetoothDevice device : pairedDevices) {
String deviceBTName = device.getName();
String deviceBTMajorClass
= getBTMajorDeviceClass(device
.getBluetoothClass()
.getMajorDeviceClass());
btArrayAdapter.add(deviceBTName + "
"
+ deviceBTMajorClass);
}
}
setListAdapter(btArrayAdapter);
}
private String getBTMajorDeviceClass(int major){
switch(major){
case BluetoothClass.Device.Major.AUDIO_VIDEO:
return "AUDIO_VIDEO";
case BluetoothClass.Device.Major.COMPUTER:
return "COMPUTER";
case BluetoothClass.Device.Major.HEALTH:
return "HEALTH";
case BluetoothClass.Device.Major.IMAGING:
return "IMAGING";
case BluetoothClass.Device.Major.MISC:
return "MISC";
case BluetoothClass.Device.Major.NETWORKING:
return "NETWORKING";
case BluetoothClass.Device.Major.PERIPHERAL:
return "PERIPHERAL";
case BluetoothClass.Device.Major.PHONE:
return "PHONE";
case BluetoothClass.Device.Major.TOY:
return "TOY";
case BluetoothClass.Device.Major.UNCATEGORIZED:
return "UNCATEGORIZED";
case BluetoothClass.Device.Major.WEARABLE:
return "AUDIO_VIDEO";
default: return "unknown!";
}
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
// TODO Auto-generated method stub
super.onListItemClick(l, v, position, id);
Intent intent = new Intent();
setResult(RESULT_OK, intent);
finish();
}
}
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