Android之Wifi学习(2)------连接Wifi
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Android之Wifi学习(2)------连接Wifi
分类: 3 Android 进阶 2011-07-17 23:28 2527人阅读 评论(7)收藏举报
之前有一篇文章已经简单的讲过Wifi的基本知识,请见Android之Wifi学习(1)。本文主要在此基础上,进一步完善程序功能,主要功能有打开无线网卡、关闭无线网卡、检查网卡状态、扫描网络、扫描结果、连接Wifi、断开Wifi、Wifi连接状态。
运行效果图如下:
其中连接Wifi是比较让我头疼的。需要在程序中进行连接,这会有两种情况。第一,Wifi没有密码,可以直接连接;第二,Wifi有密码,在程序中给出密码,然后连接。第一种我查阅相关资料好像确实是可以实现的,第二种我没找到,我自己也不知道该怎么去搞。最后想出一个办法,直接让程序跳到系统设置的Wifi的页面,然后让人手动去设置。观察了一下Android版的QQ,也确实是这么做的。不信你瞧:
点击设置网络后跳转到系统设置页面:
所以此处设置网络我也可以这么做,不过还是有点不爽,可能自己对Wifi这块还不是很熟悉,我会继续查阅相关API文档,到时候再跟大家分享,好了,下面贴一下源代码:
主页面:
- package org.sunchao;
- import android.app.Activity;
- import android.content.Intent;
- import android.os.Bundle;
- import android.view.View;
- import android.view.View.OnClickListener;
- import android.widget.Button;
- import android.widget.ScrollView;
- import android.widget.TextView;
- public class Mainextends Activity implements OnClickListener {
- // 右侧滚动条按钮
- private ScrollView sView;
- private Button openNetCard;
- private Button closeNetCard;
- private Button checkNetCardState;
- private Button scan;
- private Button getScanResult;
- private Button connect;
- private Button disconnect;
- private Button checkNetWorkState;
- private TextView scanResult;
- private String mScanResult;
- private WifiAdmin mWifiAdmin;
- /** Called when the activity is first created. */
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- mWifiAdmin = new WifiAdmin(Main.this);
- init();
- }
- /**
- * 按钮等控件的初始化
- */
- public void init() {
- sView = (ScrollView) findViewById(R.id.mScrollView);
- openNetCard = (Button) findViewById(R.id.openNetCard);
- closeNetCard = (Button) findViewById(R.id.closeNetCard);
- checkNetCardState = (Button) findViewById(R.id.checkNetCardState);
- scan = (Button) findViewById(R.id.scan);
- getScanResult = (Button) findViewById(R.id.getScanResult);
- scanResult = (TextView) findViewById(R.id.scanResult);
- connect = (Button) findViewById(R.id.connect);
- disconnect = (Button) findViewById(R.id.disconnect);
- checkNetWorkState = (Button) findViewById(R.id.checkNetWorkState);
- openNetCard.setOnClickListener(Main.this);
- closeNetCard.setOnClickListener(Main.this);
- checkNetCardState.setOnClickListener(Main.this);
- scan.setOnClickListener(Main.this);
- getScanResult.setOnClickListener(Main.this);
- connect.setOnClickListener(Main.this);
- disconnect.setOnClickListener(Main.this);
- checkNetWorkState.setOnClickListener(Main.this);
- }
- /**
- * WIFI_STATE_DISABLING 0 WIFI_STATE_DISABLED 1 WIFI_STATE_ENABLING 2
- * WIFI_STATE_ENABLED 3
- */
- public void openNetCard() {
- mWifiAdmin.openNetCard();
- }
- public void closeNetCard() {
- mWifiAdmin.closeNetCard();
- }
- public void checkNetCardState() {
- mWifiAdmin.checkNetCardState();
- }
- public void scan() {
- mWifiAdmin.scan();
- }
- public void getScanResult() {
- mScanResult = mWifiAdmin.getScanResult();
- scanResult.setText(mScanResult);
- }
- public void connect() {
- mWifiAdmin.connect();
- // startActivityForResult(new Intent(
- // android.provider.Settings.ACTION_WIFI_SETTINGS), 0);
- startActivity(new Intent(android.provider.Settings.ACTION_WIFI_SETTINGS));
- }
- public void disconnect() {
- mWifiAdmin.disconnectWifi();
- }
- public void checkNetWorkState() {
- mWifiAdmin.checkNetWorkState();
- }
- @Override
- public void onClick(View v) {
- switch (v.getId()) {
- case R.id.openNetCard:
- openNetCard();
- break;
- case R.id.closeNetCard:
- closeNetCard();
- break;
- case R.id.checkNetCardState:
- checkNetCardState();
- break;
- case R.id.scan:
- scan();
- break;
- case R.id.getScanResult:
- getScanResult();
- break;
- case R.id.connect:
- connect();
- break;
- case R.id.disconnect:
- disconnect();
- break;
- case R.id.checkNetWorkState:
- checkNetWorkState();
- break;
- default:
- break;
- }
- }
- }
package org.sunchao;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.ScrollView;import android.widget.TextView;public class Main extends Activity implements OnClickListener {// 右侧滚动条按钮private ScrollView sView;private Button openNetCard;private Button closeNetCard;private Button checkNetCardState;private Button scan;private Button getScanResult;private Button connect;private Button disconnect;private Button checkNetWorkState;private TextView scanResult;private String mScanResult;private WifiAdmin mWifiAdmin;/** Called when the activity is first created. */@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);mWifiAdmin = new WifiAdmin(Main.this);init();}/** * 按钮等控件的初始化 */public void init() {sView = (ScrollView) findViewById(R.id.mScrollView);openNetCard = (Button) findViewById(R.id.openNetCard);closeNetCard = (Button) findViewById(R.id.closeNetCard);checkNetCardState = (Button) findViewById(R.id.checkNetCardState);scan = (Button) findViewById(R.id.scan);getScanResult = (Button) findViewById(R.id.getScanResult);scanResult = (TextView) findViewById(R.id.scanResult);connect = (Button) findViewById(R.id.connect);disconnect = (Button) findViewById(R.id.disconnect);checkNetWorkState = (Button) findViewById(R.id.checkNetWorkState);openNetCard.setOnClickListener(Main.this);closeNetCard.setOnClickListener(Main.this);checkNetCardState.setOnClickListener(Main.this);scan.setOnClickListener(Main.this);getScanResult.setOnClickListener(Main.this);connect.setOnClickListener(Main.this);disconnect.setOnClickListener(Main.this);checkNetWorkState.setOnClickListener(Main.this);}/** * WIFI_STATE_DISABLING 0 WIFI_STATE_DISABLED 1 WIFI_STATE_ENABLING 2 * WIFI_STATE_ENABLED 3 */public void openNetCard() {mWifiAdmin.openNetCard();}public void closeNetCard() {mWifiAdmin.closeNetCard();}public void checkNetCardState() {mWifiAdmin.checkNetCardState();}public void scan() {mWifiAdmin.scan();}public void getScanResult() {mScanResult = mWifiAdmin.getScanResult();scanResult.setText(mScanResult);}public void connect() {mWifiAdmin.connect();//startActivityForResult(new Intent(//android.provider.Settings.ACTION_WIFI_SETTINGS), 0);startActivity(new Intent(android.provider.Settings.ACTION_WIFI_SETTINGS));}public void disconnect() {mWifiAdmin.disconnectWifi();}public void checkNetWorkState() {mWifiAdmin.checkNetWorkState();}@Overridepublic void onClick(View v) {switch (v.getId()) {case R.id.openNetCard:openNetCard();break;case R.id.closeNetCard:closeNetCard();break;case R.id.checkNetCardState:checkNetCardState();break;case R.id.scan:scan();break;case R.id.getScanResult:getScanResult();break;case R.id.connect:connect();break;case R.id.disconnect:disconnect();break;case R.id.checkNetWorkState:checkNetWorkState();break;default:break;}}}Wifi工具类:
- package org.sunchao;
- import java.util.List;
- import android.content.Context;
- import android.net.wifi.ScanResult;
- import android.net.wifi.WifiConfiguration;
- import android.net.wifi.WifiInfo;
- import android.net.wifi.WifiManager;
- import android.net.wifi.WifiManager.WifiLock;
- import android.util.Log;
- public class WifiAdmin {
- private finalstatic String TAG = "WifiAdmin";
- private StringBuffer mStringBuffer =new StringBuffer();
- private List<ScanResult> listResult;
- private ScanResult mScanResult;
- // 定义WifiManager对象
- private WifiManager mWifiManager;
- // 定义WifiInfo对象
- private WifiInfo mWifiInfo;
- // 网络连接列表
- private List<WifiConfiguration> mWifiConfiguration;
- // 定义一个WifiLock
- WifiLock mWifiLock;
- /**
- * 构造方法
- */
- public WifiAdmin(Context context) {
- mWifiManager = (WifiManager) context
- .getSystemService(Context.WIFI_SERVICE);
- mWifiInfo = mWifiManager.getConnectionInfo();
- }
- /**
- * 打开Wifi网卡
- */
- public void openNetCard() {
- if (!mWifiManager.isWifiEnabled()) {
- mWifiManager.setWifiEnabled(true);
- }
- }
- /**
- * 关闭Wifi网卡
- */
- public void closeNetCard() {
- if (mWifiManager.isWifiEnabled()) {
- mWifiManager.setWifiEnabled(false);
- }
- }
- /**
- * 检查当前Wifi网卡状态
- */
- public void checkNetCardState() {
- if (mWifiManager.getWifiState() ==0) {
- Log.i(TAG, "网卡正在关闭");
- } else if (mWifiManager.getWifiState() ==1) {
- Log.i(TAG, "网卡已经关闭");
- } else if (mWifiManager.getWifiState() ==2) {
- Log.i(TAG, "网卡正在打开");
- } else if (mWifiManager.getWifiState() ==3) {
- Log.i(TAG, "网卡已经打开");
- } else {
- Log.i(TAG, "---_---晕......没有获取到状态---_---");
- }
- }
- /**
- * 扫描周边网络
- */
- public void scan() {
- mWifiManager.startScan();
- listResult = mWifiManager.getScanResults();
- if (listResult !=null) {
- Log.i(TAG, "当前区域存在无线网络,请查看扫描结果");
- } else {
- Log.i(TAG, "当前区域没有无线网络");
- }
- }
- /**
- * 得到扫描结果
- */
- public String getScanResult() {
- // 每次点击扫描之前清空上一次的扫描结果
- if (mStringBuffer !=null) {
- mStringBuffer = new StringBuffer();
- }
- // 开始扫描网络
- scan();
- listResult = mWifiManager.getScanResults();
- if (listResult !=null) {
- for (int i =0; i < listResult.size(); i++) {
- mScanResult = listResult.get(i);
- mStringBuffer = mStringBuffer.append("NO.").append(i +1)
- .append(" :").append(mScanResult.SSID).append("->")
- .append(mScanResult.BSSID).append("->")
- .append(mScanResult.capabilities).append("->")
- .append(mScanResult.frequency).append("->")
- .append(mScanResult.level).append("->")
- .append(mScanResult.describeContents()).append("\n\n");
- }
- }
- Log.i(TAG, mStringBuffer.toString());
- return mStringBuffer.toString();
- }
- /**
- * 连接指定网络
- */
- public void connect() {
- mWifiInfo = mWifiManager.getConnectionInfo();
- }
- /**
- * 断开当前连接的网络
- */
- public void disconnectWifi() {
- int netId = getNetworkId();
- mWifiManager.disableNetwork(netId);
- mWifiManager.disconnect();
- mWifiInfo = null;
- }
- /**
- * 检查当前网络状态
- *
- * @return String
- */
- public void checkNetWorkState() {
- if (mWifiInfo != null) {
- Log.i(TAG, "网络正常工作");
- } else {
- Log.i(TAG, "网络已断开");
- }
- }
- /**
- * 得到连接的ID
- */
- public int getNetworkId() {
- return (mWifiInfo == null) ?0 : mWifiInfo.getNetworkId();
- }
- /**
- * 得到IP地址
- */
- public int getIPAddress() {
- return (mWifiInfo ==null) ? 0 : mWifiInfo.getIpAddress();
- }
- // 锁定WifiLock
- public void acquireWifiLock() {
- mWifiLock.acquire();
- }
- // 解锁WifiLock
- public void releaseWifiLock() {
- // 判断时候锁定
- if (mWifiLock.isHeld()) {
- mWifiLock.acquire();
- }
- }
- // 创建一个WifiLock
- public void creatWifiLock() {
- mWifiLock = mWifiManager.createWifiLock("Test");
- }
- // 得到配置好的网络
- public List<WifiConfiguration> getConfiguration() {
- return mWifiConfiguration;
- }
- // 指定配置好的网络进行连接
- public void connectConfiguration(int index) {
- // 索引大于配置好的网络索引返回
- if (index >= mWifiConfiguration.size()) {
- return;
- }
- // 连接配置好的指定ID的网络
- mWifiManager.enableNetwork(mWifiConfiguration.get(index).networkId,
- true);
- }
- // 得到MAC地址
- public String getMacAddress() {
- return (mWifiInfo == null) ?"NULL" : mWifiInfo.getMacAddress();
- }
- // 得到接入点的BSSID
- public String getBSSID() {
- return (mWifiInfo ==null) ? "NULL" : mWifiInfo.getBSSID();
- }
- // 得到WifiInfo的所有信息包
- public String getWifiInfo() {
- return (mWifiInfo == null) ?"NULL" : mWifiInfo.toString();
- }
- // 添加一个网络并连接
- public int addNetwork(WifiConfiguration wcg) {
- int wcgID = mWifiManager.addNetwork(mWifiConfiguration.get(3));
- mWifiManager.enableNetwork(wcgID, true);
- return wcgID;
- }
- }
package org.sunchao;import java.util.List;import android.content.Context;import android.net.wifi.ScanResult;import android.net.wifi.WifiConfiguration;import android.net.wifi.WifiInfo;import android.net.wifi.WifiManager;import android.net.wifi.WifiManager.WifiLock;import android.util.Log;public class WifiAdmin {private final static String TAG = "WifiAdmin";private StringBuffer mStringBuffer = new StringBuffer();private List<ScanResult> listResult;private ScanResult mScanResult;// 定义WifiManager对象private WifiManager mWifiManager;// 定义WifiInfo对象private WifiInfo mWifiInfo;// 网络连接列表private List<WifiConfiguration> mWifiConfiguration;// 定义一个WifiLockWifiLock mWifiLock;/** * 构造方法 */public WifiAdmin(Context context) {mWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);mWifiInfo = mWifiManager.getConnectionInfo();}/** * 打开Wifi网卡 */public void openNetCard() {if (!mWifiManager.isWifiEnabled()) {mWifiManager.setWifiEnabled(true);}}/** * 关闭Wifi网卡 */public void closeNetCard() {if (mWifiManager.isWifiEnabled()) {mWifiManager.setWifiEnabled(false);}}/** * 检查当前Wifi网卡状态 */public void checkNetCardState() {if (mWifiManager.getWifiState() == 0) {Log.i(TAG, "网卡正在关闭");} else if (mWifiManager.getWifiState() == 1) {Log.i(TAG, "网卡已经关闭");} else if (mWifiManager.getWifiState() == 2) {Log.i(TAG, "网卡正在打开");} else if (mWifiManager.getWifiState() == 3) {Log.i(TAG, "网卡已经打开");} else {Log.i(TAG, "---_---晕......没有获取到状态---_---");}}/** * 扫描周边网络 */public void scan() {mWifiManager.startScan();listResult = mWifiManager.getScanResults();if (listResult != null) {Log.i(TAG, "当前区域存在无线网络,请查看扫描结果");} else {Log.i(TAG, "当前区域没有无线网络");}}/** * 得到扫描结果 */public String getScanResult() {// 每次点击扫描之前清空上一次的扫描结果if (mStringBuffer != null) {mStringBuffer = new StringBuffer();}// 开始扫描网络scan();listResult = mWifiManager.getScanResults();if (listResult != null) {for (int i = 0; i < listResult.size(); i++) {mScanResult = listResult.get(i);mStringBuffer = mStringBuffer.append("NO.").append(i + 1).append(" :").append(mScanResult.SSID).append("->").append(mScanResult.BSSID).append("->").append(mScanResult.capabilities).append("->").append(mScanResult.frequency).append("->").append(mScanResult.level).append("->").append(mScanResult.describeContents()).append("\n\n");}}Log.i(TAG, mStringBuffer.toString());return mStringBuffer.toString();}/** * 连接指定网络 */public void connect() {mWifiInfo = mWifiManager.getConnectionInfo();}/** * 断开当前连接的网络 */public void disconnectWifi() {int netId = getNetworkId();mWifiManager.disableNetwork(netId);mWifiManager.disconnect();mWifiInfo = null;}/** * 检查当前网络状态 * * @return String */public void checkNetWorkState() {if (mWifiInfo != null) {Log.i(TAG, "网络正常工作");} else {Log.i(TAG, "网络已断开");}}/** * 得到连接的ID */public int getNetworkId() {return (mWifiInfo == null) ? 0 : mWifiInfo.getNetworkId();}/** * 得到IP地址 */public int getIPAddress() {return (mWifiInfo == null) ? 0 : mWifiInfo.getIpAddress();}// 锁定WifiLockpublic void acquireWifiLock() {mWifiLock.acquire();}// 解锁WifiLockpublic void releaseWifiLock() {// 判断时候锁定if (mWifiLock.isHeld()) {mWifiLock.acquire();}}// 创建一个WifiLockpublic void creatWifiLock() {mWifiLock = mWifiManager.createWifiLock("Test");}// 得到配置好的网络public List<WifiConfiguration> getConfiguration() {return mWifiConfiguration;}// 指定配置好的网络进行连接public void connectConfiguration(int index) {// 索引大于配置好的网络索引返回if (index >= mWifiConfiguration.size()) {return;}// 连接配置好的指定ID的网络mWifiManager.enableNetwork(mWifiConfiguration.get(index).networkId,true);}// 得到MAC地址public String getMacAddress() {return (mWifiInfo == null) ? "NULL" : mWifiInfo.getMacAddress();}// 得到接入点的BSSIDpublic String getBSSID() {return (mWifiInfo == null) ? "NULL" : mWifiInfo.getBSSID();}// 得到WifiInfo的所有信息包public String getWifiInfo() {return (mWifiInfo == null) ? "NULL" : mWifiInfo.toString();}// 添加一个网络并连接public int addNetwork(WifiConfiguration wcg) {int wcgID = mWifiManager.addNetwork(mWifiConfiguration.get(3));mWifiManager.enableNetwork(wcgID, true);return wcgID;}}AndroidManifest.xml:(注意需要添加的权限)
- <?xmlversion="1.0"encoding="utf-8"?>
- <manifestxmlns:android="http://schemas.android.com/apk/res/android"
- package="org.sunchao"android:versionCode="1"android:versionName="1.0">
- <uses-sdkandroid:minSdkVersion="8"/>
- <applicationandroid:icon="@drawable/icon"android:label="@string/app_name">
- <activityandroid:name=".Main"android:label="@string/app_name">
- <intent-filter>
- <actionandroid:name="android.intent.action.MAIN"/>
- <categoryandroid:name="android.intent.category.LAUNCHER"/>
- </intent-filter>
- </activity>
- </application>
- <!-- 以下是使用wifi访问网络所需的权限 -->
- <uses-permissionandroid:name="android.permission.CHANGE_NETWORK_STATE"></uses-permission>
- <uses-permissionandroid:name="android.permission.CHANGE_WIFI_STATE"></uses-permission>
- <uses-permissionandroid:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission>
- <uses-permissionandroid:name="android.permission.ACCESS_WIFI_STATE"></uses-permission>
- </manifest>
<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"package="org.sunchao" android:versionCode="1" android:versionName="1.0"><uses-sdk android:minSdkVersion="8" /><application android:icon="@drawable/icon" android:label="@string/app_name"><activity android:name=".Main" android:label="@string/app_name"><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity></application><!-- 以下是使用wifi访问网络所需的权限 --><uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"></uses-permission><uses-permission android:name="android.permission.CHANGE_WIFI_STATE"></uses-permission><uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission><uses-permission android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission></manifest>布局文件就不贴了,我想看界面你都可以自己写出来,如果有需要,这里可以下载源代码:http://download.csdn.net/source/3449837
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