Android Open Source - BLE-Heart-rate-variability-demo Ble Devices Adapter

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Back to project page BLE-Heart-rate-variability-demo.

License

The source code is released under:

MIT License

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Java Source Code

package com.sample.hrv.adapters;
//from ww  w  . j  ava2s  . c  o  m
import android.bluetooth.BluetoothDevice;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.HashMap;

import com.sample.hrv.R;

/** Adapter for holding devices found through scanning.
 *  Created by steven on 9/5/13.
 *  Modified by olli on 3/28/2014.
 */
public class BleDevicesAdapter extends BaseAdapter {
    private final LayoutInflater inflater;

    private final ArrayList<BluetoothDevice> leDevices;
    private final HashMap<BluetoothDevice, Integer> rssiMap = new HashMap<BluetoothDevice, Integer>();

    public BleDevicesAdapter(Context context) {
        leDevices = new ArrayList<BluetoothDevice>();
        inflater = LayoutInflater.from(context);
    }

    public void addDevice(BluetoothDevice device, int rssi) {
        if (!leDevices.contains(device)) {
            leDevices.add(device);
        }
        rssiMap.put(device, rssi);
    }

    public BluetoothDevice getDevice(int position) {
        return leDevices.get(position);
    }

    public void clear() {
        leDevices.clear();
    }

    @Override
    public int getCount() {
        return leDevices.size();
    }

    @Override
    public Object getItem(int i) {
        return leDevices.get(i);
    }

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

    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        ViewHolder viewHolder;
        // General ListView optimization code.
        if (view == null) {
            view = inflater.inflate(R.layout.listitem_device, null);
            viewHolder = new ViewHolder();
            viewHolder.deviceAddress = (TextView) view.findViewById(R.id.device_address);
            viewHolder.deviceName = (TextView) view.findViewById(R.id.device_name);
            viewHolder.deviceRssi = (TextView) view.findViewById(R.id.device_rssi);
            view.setTag(viewHolder);
        } else {
            viewHolder = (ViewHolder) view.getTag();
        }

        BluetoothDevice device = leDevices.get(i);
        final String deviceName = device.getName();
        if (deviceName != null && deviceName.length() > 0)
            viewHolder.deviceName.setText(deviceName);
        else
            viewHolder.deviceName.setText(R.string.unknown_device);
        viewHolder.deviceAddress.setText(device.getAddress());
        viewHolder.deviceRssi.setText(""+rssiMap.get(device)+" dBm");

        return view;
    }

    private static class ViewHolder {
        TextView deviceName;
        TextView deviceAddress;
        TextView deviceRssi;
    }
}

Java Source Code List