响应试网站和移动端华为云速建站
Android系统是基于Linux的，所连接的设备的一些信息保存在了 /proc/net/arp 文件中。
下面直接上我编写的程序，当前手机开启AP后，点击按钮直接获取连接到本热点的IP，然后显示在Textview控件上。
下载地址：点击打开
代码如下：
package com.example.test;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.util.ArrayList;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
/*
* 本例可以获取到连接到本手机AP热点设备的IP地址
*/
public class MainActivity extends Activity {
private Button button;
private TextView textView;
StringBuilder resultList;
ArrayList connectedIP;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button = (Button) findViewById(R.id.button);
textView = (TextView) findViewById(R.id.textview);
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
try {
connectedIP = getConnectIp();
} catch (Exception e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
resultList = new StringBuilder();
for (String ip : connectedIP) {
resultList.append(ip);
resultList.append("\n");
try {
connectedIP = getConnectIp();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
System.out.print(resultList);
String textString = resultList.toString();
textView.setText(textString);
}
});
}
private ArrayList getConnectIp() throws Exception {
ArrayList connectIpList = new ArrayList();
BufferedReader br = new BufferedReader(new FileReader("/proc/net/arp"));
String line;
while ((line = br.readLine()) != null) {
String[] splitted = line.split(" +");
if (splitted != null && splitted.length >= 4) {
String ip = splitted[0];
connectIpList.add(ip);
}
}
return connectIpList;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}