1、获得WifiManager对象WifiManagerwm=(WifiManager)getApplicationContext().getSystemService(Context.WIFI_SERVICE);
2、通过WifiManager对象获得wifi信息WifiInfoinfo=wm.getConnectionInfo();
3、通过WifiInfo获得wifi信息//通过wifi管理对象获得wifi信息
WifiInfo info = wm.getConnectionInfo();
//获取wifi名称
String ssid = info.getSSID().replace("\"", "");
//获取mac地址
String MacAddr = info.getMacAddress();
//获取当前连接速度
int linkSpeed = info.getLinkSpeed();
//获取ip地址
int ipAddr = info.getIpAddress();
......
xml代码<?xml version="1.0" encoding="utf-8"?>
xmlns:app="/apk/res-auto"
xmlns:tools="/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="20dp"
tools:context=".MainActivity">
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="SSID:"
android:textColor="@android:color/black"
android:textSize="30sp" />
android:id="@+id/wifiSSID"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="@id/textView1"
android:text="-"
android:textColor="@android:color/black"
android:textSize="30sp" />
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="信号强度"
android:layout_below="@id/textView1"
android:textColor="@android:color/black"
android:textSize="30sp" />
android:id="@+id/ivWifi"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/textView2"
android:background="@drawable/wifi1"/>
主函数代码import android.app.Activity;
import android.content.Context;
import .wifi.WifiInfo;
import .wifi.WifiManager;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
private WifiManager wm;
private TextView wifiSSID;
private ImageView ivWifi;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
initWifi();
}
private void initView() {
wifiSSID = findViewById(R.id.wifiSSID);
ivWifi = findViewById(R.id.ivWifi);
}
Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case 1:
wifiSSID.setText(msg.obj.toString());
if (msg.arg1 <= 50) {
ivWifi.setBackgroundResource(R.drawable.wifi4);
} else if (msg.arg1 <= 70) {
ivWifi.setBackgroundResource(R.drawable.wifi3);
} else if (msg.arg1 <= 100) {
ivWifi.setBackgroundResource(R.drawable.wifi2);
}
break;
case 2:
wifiSSID.setText("-");
ivWifi.setBackgroundResource(R.drawable.wifi1);
break;
}
}
};
private void initWifi() {
Thread thread = new Thread() {
@Override
public void run() {
while (true) {
try {
sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
//拿到wifi管理对象
wm = (WifiManager) getApplicationContext().getSystemService(Context.WIFI_SERVICE);
if (wm.isWifiEnabled()) {
//通过wifi管理对象获得wifi信息
WifiInfo info = wm.getConnectionInfo();
//获取wifi名称
String ssid = info.getSSID().replace("\"", "");
//获取mac地址
String MacAddr = info.getMacAddress();
//获取当前连接速度
int linkSpeed = info.getLinkSpeed();
//获取ip地址
int ipAddr = info.getIpAddress();
Message msg = Message.obtain();
msg.what = 1;
msg.obj = ssid;
/**
*getRssi()返回的是一个-100到0的数，直接取绝对值
*-50到0表示信号好
*-50到-70表示信号一般
*-70到-100表示信号差
*/
msg.arg1 = Math.abs(info.getRssi());
handler.sendMessage(msg);
} else {
Message msg = Message.obtain();
msg.what = 2;
handler.sendMessage(msg);
}
}
}
};
thread.start();
}
}
最后给权限
