android wifi连接开发实例

xiaoxiao2021-02-28 133

转自：http://blog.csdn.net/dianqiugg/article/details/8205613

参考网上代码，结合了自己的想法，废话不多说，直接上代码

1、布局文件：wifi_layout.xml

<?xml version="1.0" encoding="utf-8"?> < LinearLayout xmlns:Android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> <Button android:id="@+id/scan_button" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="扫描" android:textColor="#000000" /> <TextView android:id="@+id/wifi_result_textview" android:layout_width="fill_parent" android:layout_height="wrap_content" /> < /LinearLayout> 2、Activity：WifiActivity.Java

package com.android.activity;

import java.util.List;

import android.app.AlertDialog.Builder; import android.app.ProgressDialog; import android.content.Context; import android.content.DialogInterface; import android.NET.wifi.ScanResult; import android.net.wifi.WifiConfiguration; import android.Net.wifi.WifiInfo; import android.net.wifi.WifiManager; import android.os.AsyncTask; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import android.widget.Toast;

import com.android.demo.R; import com.android.util.WifiUtil;

/** * @ClassName: WifiActivity * @Description: TODO * @date 2012-11-9 上午11:47:51 * */ public class WifiActivity extends BaseActivity implements OnClickListener {

private Button scan_button;

private TextView wifi_result_textview;

private WifiManager wifiManager;

private WifiInfo currentWifiInfo;// 当前所连接的wifi

private List<ScanResult> wifiList;// wifi列表

private String[] str;

private int wifiIndex;

private ProgressDialog progressDialog;

@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.wifi_layout); wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE); setupViews(); initListener(); }

@Override protected void onResume() { openWifi(); currentWifiInfo = wifiManager.getConnectionInfo(); wifi_result_textview.setText("当前网络：" + currentWifiInfo.getSSID() + " ip:" + WifiUtil.intToIp(currentWifiInfo.getIpAddress())); new ScanWifiThread().start(); super.onResume(); }

@Override public void setupViews() { scan_button = (Button) findViewById(R.id.scan_button); wifi_result_textview = (TextView) findViewById(R.id.wifi_result_textview); super.setupViews(); }

@Override public void initListener() { scan_button.setOnClickListener(this); super.initListener(); }

@Override public void onClick(View v) { switch (v.getId()) { case R.id.scan_button: lookUpScan(); break; } }

/** * 打开wifi */ public void openWifi() { if (!wifiManager.isWifiEnabled()) { wifiManager.setWifiEnabled(true); } }

/** * 扫描wifi线程 * * @author passing * */ class ScanWifiThread extends Thread {

@Override public void run() { while (true) { currentWifiInfo = wifiManager.getConnectionInfo(); startScan(); try { Thread.sleep(1000); } catch (InterruptedException e) { break; } } } }

/** * 扫描wifi */ public void startScan() { wifiManager.startScan(); // 获取扫描结果 wifiList = wifiManager.getScanResults(); str = new String[wifiList.size()]; String tempStr = null; for (int i = 0; i < wifiList.size(); i++) { tempStr = wifiList.get(i).SSID; if (null != currentWifiInfo && tempStr.equals(currentWifiInfo.getSSID())) { tempStr = tempStr + "(已连接)"; } str[i] = tempStr; } }

/** * 弹出框查看扫描结果 */ public void lookUpScan() { Builder builder = new Builder(WifiActivity.this); builder.setTitle("wifi"); builder.setItems(str, new DialogInterface.OnClickListener() {

@Override public void onClick(DialogInterface dialog, int which) { wifiIndex = which; handler.sendEmptyMessage(3); } }); builder.show(); }

/** * 获取网络ip地址 * * @author passing * */ class RefreshSsidThread extends Thread {

@Override public void run() { boolean flag = true; while (flag) { currentWifiInfo = wifiManager.getConnectionInfo(); if (null != currentWifiInfo.getSSID() && 0 != currentWifiInfo.getIpAddress()) { flag = false; } } handler.sendEmptyMessage(4); super.run(); } }

/** * 连接网络 * * @param index * @param password */ public void connetionConfiguration(int index, String password) { progressDialog = ProgressDialog.show(WifiActivity.this, "正在连接...", "请稍候..."); new ConnectWifiThread().execute(index + "", password); }

/** * 连接wifi * * @author passing * */ class ConnectWifiThread extends AsyncTask<String, Integer, String> {

@Override protected String doInBackground(String... params) { int index = Integer.parseInt(params[0]); if (index > wifiList.size()) { return null; } // 连接配置好指定ID的网络 WifiConfiguration config = WifiUtil.createWifiInfo( wifiList.get(index).SSID, params[1], 3, wifiManager);

int networkId = wifiManager.addNetwork(config); if (null != config) { wifiManager.enableNetwork(networkId, true); return wifiList.get(index).SSID; } return null; }

@Override protected void onPostExecute(String result) { if (null != progressDialog) { progressDialog.dismiss(); } if (null != result) { handler.sendEmptyMessage(0); } else { handler.sendEmptyMessage(1); } super.onPostExecute(result); }

}

Handler handler = new Handler() {

@Override public void handleMessage(Message msg) { switch (msg.what) { case 0: wifi_result_textview.setText("正在获取ip地址..."); new RefreshSsidThread().start(); break; case 1: Toast.makeText(WifiActivity.this, "连接失败！", Toast.LENGTH_SHORT) .show(); break; case 3: View layout = LayoutInflater.from(WifiActivity.this).inflate( R.layout.custom_dialog_layout, null); Builder builder = new Builder(WifiActivity.this); builder.setTitle("请输入密码").setView(layout); final EditText passowrdText = (EditText) layout .findViewById(R.id.password_edittext); builder.setPositiveButton("连接", new DialogInterface.OnClickListener() {

@Override public void onClick(DialogInterface dialog, int which) { connetionConfiguration(wifiIndex, passowrdText .getText().toString()); } }).show(); break; case 4: Toast.makeText(WifiActivity.this, "连接成功！", Toast.LENGTH_SHORT) .show(); wifi_result_textview.setText("当前网络：" + currentWifiInfo.getSSID() + " ip:" + WifiUtil.intToIp(currentWifiInfo.getIpAddress())); break; } super.handleMessage(msg); }

};

}

3、辅助类：WifiUtil.java

/** * */ package com.android.util;

import java.util.List;

import android.net.wifi.WifiConfiguration; import android.net.wifi.WifiManager;

/** * @author passing * */ public class WifiUtil {

/** * 配置wifi * * @param SSID * @param Password * @param Type * @return */ public static WifiConfiguration createWifiInfo(String SSID, String Password, int Type, WifiManager wifiManager) { WifiConfiguration config = new WifiConfiguration(); config.allowedAuthAlgorithms.clear(); config.allowedGroupCiphers.clear(); config.allowedKeyManagement.clear(); config.allowedPairwiseCiphers.clear(); config.allowedProtocols.clear(); config.SSID = "\"" + SSID + "\"";

WifiConfiguration tempConfig = isExsits(SSID, wifiManager); if (tempConfig != null) { wifiManager.removeNetwork(tempConfig.networkId); }

if (Type == 1) // WIFICIPHER_NOPASS { config.wepKeys[0] = ""; config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE); config.wepTxKeyIndex = 0; } if (Type == 2) // WIFICIPHER_WEP { config.hiddenSSID = true; config.wepKeys[0] = "\"" + Password + "\""; config.allowedAuthAlgorithms .set(WifiConfiguration.AuthAlgorithm.SHARED); config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP); config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP); config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40); config.allowedGroupCiphers .set(WifiConfiguration.GroupCipher.WEP104); config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE); config.wepTxKeyIndex = 0; } if (Type == 3) // WIFICIPHER_WPA { config.preSharedKey = "\"" + Password + "\""; config.hiddenSSID = true; config.allowedAuthAlgorithms .set(WifiConfiguration.AuthAlgorithm.OPEN); config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP); config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK); config.allowedPairwiseCiphers .set(WifiConfiguration.PairwiseCipher.TKIP); // config.allowedProtocols.set(WifiConfiguration.Protocol.WPA); config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP); config.allowedPairwiseCiphers .set(WifiConfiguration.PairwiseCipher.CCMP); config.status = WifiConfiguration.Status.ENABLED; } return config; }

/** * 判断wifi是否存在 * * @param SSID * @param wifiManager * @return */ private static WifiConfiguration isExsits(String SSID, WifiManager wifiManager) { List<WifiConfiguration> existingConfigs = wifiManager .getConfiguredNetworks(); for (WifiConfiguration existingConfig : existingConfigs) { if (existingConfig.SSID.equals("\"" + SSID + "\"")) { return existingConfig; } } return null; }

/** * 转换IP地址 * * @param i * @return */ public static String intToIp(int i) { return (i & 0xFF) + "." + ((i >> 8) & 0xFF) + "." + ((i >> 16) & 0xFF) + "." + ((i >> 24) & 0xFF); } }

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