获取 Android 的蓝牙 RSSI Wear on Android phone
Get Bluetooth RSSI of Android Wear on an Android phone
我想通过蓝牙 RSSI 确定 Android phone (Nexus 5X) 和 Android Wear 设备 (Samsung Gear live) 之间的距离。
我找到了使用蓝牙功能的解决方案readRemoteRssi();
,如
final Runnable runnable = new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
mBluetoothLeService.readRemoteRssi();
mHandler.postDelayed(this, 1000);
}
};
但是,使用AndroidWear时,不需要使用蓝牙管理器、适配器或GATT服务;我没有看到它们在可穿戴示例项目中被初始化。这是我的问题:如何在配对后以大约 5 秒的间隔从 phone 上的 Android Wear 获取蓝牙 RSSI 值。有人可以指出大致按照我计划执行的示例代码吗?
[编辑] 我找到了许多代码示例并以以下 MainActivity 结尾。我能够获得配对设备的列表,然后我开始发现并使用 BroadcastReceiver 尝试读出 RSSI 值。
package com.tudelft.androidweardistance;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ListView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.Set;
public class MainActivity extends AppCompatActivity {
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);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
listView = (ListView) findViewById(R.id.listView);
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
getPairedDevices();
startDiscovery();
IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
registerReceiver(mReceiver, filter);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
public void discover(View view){
getPairedDevices();
startDiscovery();
IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
registerReceiver(mReceiver, filter);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
private void startDiscovery() {
mBluetoothAdapter.cancelDiscovery();
mBluetoothAdapter.startDiscovery();
}
private void getPairedDevices() {
Set<BluetoothDevice> devicesArray=mBluetoothAdapter.getBondedDevices();
if(devicesArray.size()>0){
for(BluetoothDevice device:devicesArray){
mDeviceList.add(device.getName());
System.out.println(device.getName());
}
}
}
@Override
protected void onDestroy() {
unregisterReceiver(mReceiver);
super.onDestroy();
}
private final BroadcastReceiver mReceiver = new BroadcastReceiver(){
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if(BluetoothDevice.ACTION_FOUND.equals(action)) {
int rssi = intent.getShortExtra(BluetoothDevice.EXTRA_RSSI,Short.MIN_VALUE);
Toast.makeText(getApplicationContext(), " RSSI: " + rssi + "dBm", Toast.LENGTH_SHORT).show();
System.out.println(rssi);
}
}
};
}
会不会是 Samsung Gear Live 与 RSSI 服务不兼容,因为 BroadcastReceiver 没有打印任何 RSSI。
非常感谢,
LHJ
Android Wear 的蓝牙通信由 Android 操作系统处理。由于不存在蓝牙适配器,因此在建立连接后无法通过应用程序访问 RSSI 数据。
我想通过蓝牙 RSSI 确定 Android phone (Nexus 5X) 和 Android Wear 设备 (Samsung Gear live) 之间的距离。
我找到了使用蓝牙功能的解决方案readRemoteRssi();
,如
final Runnable runnable = new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
mBluetoothLeService.readRemoteRssi();
mHandler.postDelayed(this, 1000);
}
};
但是,使用AndroidWear时,不需要使用蓝牙管理器、适配器或GATT服务;我没有看到它们在可穿戴示例项目中被初始化。这是我的问题:如何在配对后以大约 5 秒的间隔从 phone 上的 Android Wear 获取蓝牙 RSSI 值。有人可以指出大致按照我计划执行的示例代码吗?
[编辑] 我找到了许多代码示例并以以下 MainActivity 结尾。我能够获得配对设备的列表,然后我开始发现并使用 BroadcastReceiver 尝试读出 RSSI 值。
package com.tudelft.androidweardistance;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ListView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.Set;
public class MainActivity extends AppCompatActivity {
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);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
listView = (ListView) findViewById(R.id.listView);
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
getPairedDevices();
startDiscovery();
IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
registerReceiver(mReceiver, filter);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
public void discover(View view){
getPairedDevices();
startDiscovery();
IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
registerReceiver(mReceiver, filter);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
private void startDiscovery() {
mBluetoothAdapter.cancelDiscovery();
mBluetoothAdapter.startDiscovery();
}
private void getPairedDevices() {
Set<BluetoothDevice> devicesArray=mBluetoothAdapter.getBondedDevices();
if(devicesArray.size()>0){
for(BluetoothDevice device:devicesArray){
mDeviceList.add(device.getName());
System.out.println(device.getName());
}
}
}
@Override
protected void onDestroy() {
unregisterReceiver(mReceiver);
super.onDestroy();
}
private final BroadcastReceiver mReceiver = new BroadcastReceiver(){
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if(BluetoothDevice.ACTION_FOUND.equals(action)) {
int rssi = intent.getShortExtra(BluetoothDevice.EXTRA_RSSI,Short.MIN_VALUE);
Toast.makeText(getApplicationContext(), " RSSI: " + rssi + "dBm", Toast.LENGTH_SHORT).show();
System.out.println(rssi);
}
}
};
}
会不会是 Samsung Gear Live 与 RSSI 服务不兼容,因为 BroadcastReceiver 没有打印任何 RSSI。
非常感谢, LHJ
Android Wear 的蓝牙通信由 Android 操作系统处理。由于不存在蓝牙适配器,因此在建立连接后无法通过应用程序访问 RSSI 数据。