Android连续获取当前所连接WiFi及周围热点列表信息的解决方案

基础知识：

获取系统wifi服务

// 获取系统wifi服务
WifiManage wm = (WifiManager) getApplicationContext().getSystemService(WIFI_SERVICE);
// 获取当前所连接wifi的信息
WifiInfo wi = wm.getConnectionInfo();
// 获取扫描到的所有wifi信息
List<ScanResult> scanResults = wm.getScanResults();

获取wifi信息的各种方法及异同

WifiManage类wifi信息获取方法

wm.getConnectionInfo(); // 获取当前连接信息
wm.getWifiState();      // 获取当前手机wifi网卡状态
wm.getScanResults();    // 获取扫描到的wifi信息列表（返回类型是链表）

WifiManager.WIFI_STATE_ENABLED

WifiManager.WIFI_STATE_DISABLED

WifiManager.WIFI_STATE_DISABLING

WifiManager.WIFI_STATE_ENABLING

WifiManager.WIFI_STATE_UNKNOWN

WifiInfo类方法

wi.getSSID();        // 获取当前连接wifi的名词
wi.getBSSID();       // 获取路由器Mac地址，String类型
wi.getMacAddress();  // 获取本机Mac地址
wi.getRssi();        // 获取当前连接wifi的信号强度
wi.getLinkSpeed();   // 获取连接速度

WifiInfo.LINK_SPEED_UNITS; // 连接速度单位

wi.getRssi()

ScanResult类方法

scanResult.SSID();
scanResult.BSSID();
scanResult.level();    // 信号强度(原始数据)

WifiManager.calculateSignalLevel(scanResult.level(),5); // 计算强度等级，此处分5级。

利用多线程实现数据的持续性采集

代码展示

<?xml version="1.0" encoding="utf-8"?
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.lenovo.wifi_bluetooth.MainActivity">
<RelativeLayout
android:id="@+id/relativelayout1"
android:gravity="start|center_vertical"
android:layout_width="368dp"
android:layout_height="wrap_content">
<LinearLayout
android:id="@+id/Curr_connected_wifi"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:orientation="vertical">
<TextView
android:id="@+id/testView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/str2"/>
<EditText
android:id="@+id/et1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:cursorVisible="false"
android:focusable="false"
android:focusableInTouchMode="false" />
</LinearLayout>

<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/Curr_connected_wifi"
android:scrollbars="vertical"
android:fadingEdge="vertical">
<LinearLayout
android:id="@+id/list_wifi"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="@+id/testView2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/str1" />

<EditText
android:id="@+id/et2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:cursorVisible="false"
android:focusable="false"
android:focusableInTouchMode="false" />
</LinearLayout>
</ScrollView>
</RelativeLayout>
</android.support.constraint.ConstraintLayout>

package com.example.lenovo.wifi_bluetooth;
import android.net.wifi.ScanResult;
import java.util.List;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.EditText;

public class MainActivity extends AppCompatActivity {
private WifiManager wm;
EditText editText1 ;
EditText editText2;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
new tvThread().start();
}

private class tvThread extends Thread {
@Override
public void run() {
while (true) {
runOnUiThread(new Runnable() {
@Override
public void run() {
obtainListInfo();
}
});
try {
Thread.sleep(1000);
} catch (InterruptedException e) {

9b00
e.printStackTrace();
}
}
}
}

private void obtainListInfo(){
//---------------------------------------------->

editText1 = (EditText) findViewById(R.id.et1);
editText2 = (EditText) findViewById(R.id.et2);
//显示扫描到的所有wifi信息
wm = (WifiManager) getApplicationContext().getSystemService(WIFI_SERVICE);
WifiInfo wi = wm.getConnectionInfo();

int strength = wi.getRssi();
int speed = wi.getLinkSpeed();
String designation = wi.getSSID();

String addr = wi.getBSSID();
String unit = WifiInfo.LINK_SPEED_UNITS;

if (wm.getWifiState() == WifiManager.WIFI_STATE_ENABLED) {
StringBuilder listinfo = new StringBuilder();
//搜索到的wifi列表信息
List<ScanResult> scanResults = wm.getScanResults();

for (ScanResult sr:scanResults){
listinfo.append("wifi网络ID：");
listinfo.append(sr.SSID);
listinfo.append("\nwifi MAC地址：");
listinfo.append(sr.BSSID);
listinfo.append("\nwifi信号强度：");
listinfo.append(sr.level+"\n\n");
}
editText2.setText(listinfo.toString());
String curr_connected_wifi=null;
curr_connected_wifi="Currently connecting WiFi \'"+designation+"\' \nRssi: "+strength+
"\nMac addr: "+addr+"\nspeed: "+speed+" "+unit;
editText1.setText(curr_connected_wifi.toString());
}
//------------------------------------------------------------------->
}

}

<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission android:name="android.permission.INTERNET"/>