gpt4 book ai didi

Android WiFi 无法从 ScanResult 获取 SSID 和 BSSID

转载 作者:行者123 更新时间:2023-11-29 20:48:39 32 4
gpt4 key购买 nike

我得到了这段代码,我想扫描网络,然后将其全部写入 ListView 。但问题是 ssid 和 bssid 不显示。显示其他所有内容,但不显示 ssid。

还有什么是每秒更新 ListView 以便您可以看到信号强度实际信号的最佳方法?

import java.util.List;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import com.example.wifi.R;

public class MainActivity extends Activity {

WifiManager wifiManager;
WifiScanReceiver wifiReciever;
ListView list;
String wifis[];
WifiInfo wifiInfo;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
list = (ListView) findViewById(R.id.text);
wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
wifiReciever = new WifiScanReceiver();
wifiInfo = wifiManager.getConnectionInfo();
wifiManager.startScan();
}



protected void onPause() {
unregisterReceiver(wifiReciever);
super.onPause();
}

protected void onResume() {
registerReceiver(wifiReciever, new IntentFilter(
WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));
super.onResume();
}

class WifiScanReceiver extends BroadcastReceiver {
@SuppressLint("UseValueOf")
public void onReceive(Context c, Intent intent) {
List<ScanResult> wifiScanList = wifiManager.getScanResults();
wifis = new String[wifiScanList.size()];
for (int i = 0; i < wifiScanList.size(); i++) {
wifis[i] = ((wifiScanList.get(i)).toString());
}

list.setAdapter(new ArrayAdapter<String>(getApplicationContext(),
android.R.layout.simple_list_item_1, wifis));
}
}
}

最佳答案

您可以使用 wifiScanList.get(i).SSIDScanResult 对象中获取 SSIDBSSID > 和 wifiScanList.get(i).BSSID。然后将它附加到从 toString() 返回的其他数据中。

参见 Documentation Here .

首先,将您的ArrayAdapter 声明为实例变量,并在onCreate() 中调用setAdapter():

ArrayAdapter adapter;
ListView list;
ArrayList<String> wifis;
WifiInfo wifiInfo;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
list = (ListView) findViewById(R.id.text);
wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
wifiReciever = new WifiScanReceiver();
wifiInfo = wifiManager.getConnectionInfo();

wifis = new ArrayList<String>(); //initialize wifis
wifis.add("loading...");
adapter = new ArrayAdapter<String>(getApplicationContext(),
android.R.layout.simple_list_item_1, wifis)
list.setAdapter(adapter);

wifiManager.startScan(); //make sure this is the last call
}

修改后的BroadcastReceiver:

class WifiScanReceiver extends BroadcastReceiver {
@SuppressLint("UseValueOf")
public void onReceive(Context c, Intent intent) {
List<ScanResult> wifiScanList = wifiManager.getScanResults();
//wifis = new String[wifiScanList.size()]; //remove this
wifis.clear(); //add this
for (int i = 0; i < wifiScanList.size(); i++) {
String ssid = wifiScanList.get(i).SSID; //Get the SSID
String bssid = wifiScanList.get(i).BSSID //Get the BSSID
//use add here:
wifis.add( ssid + " " + bssid + " " +((wifiScanList.get(i)).toString()) ); //append to the other data
}

adapter.notifyDataSetChanged(); //add this
wifiManager.startScan(); //start a new scan to update values faster

//ArrayAdapter adapter = new ArrayAdapter<String>(getApplicationContext(),
// android.R.layout.simple_list_item_1, wifis)
//list.setAdapter(adapter);
}
}

这仍然只会在每次扫描结果时更新。我认为不建议每秒更新一个 ListView,您可能需要重新考虑显示 RSSI 级别的方法。您可以点击每个 SSID,并使用 TextView 显示详细信息 View ,您可以在其中每秒更新当前 SSID 的 RSSI。

关于Android WiFi 无法从 ScanResult 获取 SSID 和 BSSID,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/29742249/

32 4 0
Copyright 2021 - 2024 cfsdn All Rights Reserved 蜀ICP备2022000587号
广告合作:1813099741@qq.com 6ren.com