android蓝牙开发二-

1、获取系统已配对的蓝牙设备

public class BluePairedActivity extends Activity {
public static final String TAG ="Chunna==BlueActivity";
private List blueList;
private HashMap blueHashMap;
private ListView glvPaired;
private BluetoothAdapter adapter;
private PairedBluetoothDialogAdapter pairedAdapter;

public static BluetoothSocket socket;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_blue_paired);
initBlueTooth();
glvPaired = (ListView)findViewById(R.id.lv_blue_paired);
pairedAdapter = new PairedBluetoothDialogAdapter(this,blueList);
pairedAdapter.notifyDataSetChanged();

glvPaired.setAdapter(pairedAdapter);
glvPaired.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
BluetoothDevice gDevice = (BluetoothDevice)(((HashMap)pairedAdapter.getItem(position)).get("blue_device"));
Log.d(TAG, "想要连接的远程主机：" + gDevice);
Log.d(TAG, "想要连接的远程主机：" + gDevice.toString());

//然后就可以连接或者做操作啦
}
});
}

private void initBlueTooth() {
adapter = BluetoothAdapter.getDefaultAdapter();
if (adapter != null) {
if (!adapter.isEnabled()) {
adapter.enable();
//sleep one second ,avoid do not discovery
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}

Set devices = adapter.getBondedDevices();
blueList = new ArrayList();
Log.d(TAG,"获取已经配对devices"+devices.size());
for (BluetoothDevice bluetoothDevice : devices)
{
Log.d(TAG, "已经配对的蓝牙设备：");
Log.d(TAG, bluetoothDevice.getName());
Log.d(TAG, bluetoothDevice.getAddress());
blueHashMap = new HashMap();
blueHashMap.put("blue_device",bluetoothDevice);
blueHashMap.put("blue_name",bluetoothDevice.getName());
blueHashMap.put("blue_address",bluetoothDevice.getAddress());
blueList.add(blueHashMap);
}
}else{
ToastUtil.getShortToastByString(this,"本机没有蓝牙设备");
}
}
}

PairedBluetoothDialogAdapter.java：listView的Adapter类，显示listView列表的每一项数据，其中有两个TextView控件，用来显示蓝牙名和蓝牙地址。还有一个BluetoothDevice对象，这个对象不是用来显示，是用来在列表点击时，返回蓝牙设备

public class PairedBluetoothDialogAdapter extends BaseAdapter {
public static final String TAG = "ListViewAdapter";
private Context context;
private List arrayList;
public PairedBluetoothDialogAdapter(Context context, List arrayList){
this.context = context;
this.arrayList = arrayList;
}
@Override
public int getCount() {
return arrayList.size();
}

@Override
public Object getItem(int position) {
return arrayList.get(position);
}

@Override
public long getItemId(int position) {
return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
LayoutInflater mInflater = LayoutInflater.from(context);
if(convertView == null)
{
holder = new ViewHolder();
convertView = mInflater.inflate(R.layout.item_paired_bluetooth, null);
holder.tvName = (TextView)convertView.findViewById(R.id.item_name);
holder.tvAddress = (TextView)convertView.findViewById(R.id.item_address);
convertView.setTag(holder);
}else {
Log.d(TAG, "not_null " + position);
holder = (ViewHolder)convertView.getTag();
}
holder.device = (BluetoothDevice) ((HashMap)arrayList.get(position)).get("blue_device");
holder.tvName.setText((String)((HashMap)arrayList.get(position)).get("blue_name"));
holder.tvAddress.setText((String)((HashMap)arrayList.get(position)).get("blue_address"));
return convertView;
}
static class ViewHolder
{
public BluetoothDevice device;//不是用来显示，用来在item点击时返回连接对象
public TextView tvName;
public TextView tvAddress;
}
}
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版权声明：本文为CSDN博主「596785154」的原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/zcn596785154/article/details/78109938

activity_blue_paired.xml布：里面有一个列表，用于显示所有已配对的设备

<?xml version="1.0" encoding="utf-8"?>
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:background="@color/white"
android:orientation="vertical">
android:id="@+id/title"
style="@style/text_18_ffffff"
android:layout_width="fill_parent"
android:layout_height="60dp"
android:gravity="center"
android:background="#84b9ff"
android:text="已配对蓝牙列表"
android:visibility="visible" />
android:layout_width="match_parent"
android:layout_height="120dp">
android:id="@+id/lv_blue_paired"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:divider="#e6e7e9"
android:dividerHeight="1dp"
android:headerDividersEnabled="true"
android:footerDividersEnabled="true"
android:scrollbars="none"
android:cacheColorHint="#00000000"
android:listSelector="#00000000" />

————————————————
版权声明：本文为CSDN博主「596785154」的原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/zcn596785154/article/details/78109938

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