最近家里老人总是问我如何连接WIFI，和他们电话讲又讲不清楚，于是我想到了写一个，打开自动连接指定WIFI的软件。练练手。
废话不多说，首先布局，简单！
两个文本框一个按钮
代码语言：javascript复制<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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=".Shezhi"
android:orientation="vertical"
android:background="#b2cbfd"
android:focusable="true"
android:focusableInTouchMode="true">
<EditText
android:hint="请输入wifi名"
android:layout_marginTop="10dp"
android:id="@ id/mingzi"
android:layout_width="match_parent"
android:layout_height="50dp" />
<EditText
android:hint="请输入wifi密码"
android:layout_marginTop="10dp"
android:id="@ id/mima"
android:layout_width="match_parent"
android:layout_height="50dp" />
<Button
android:textSize="20sp"
android:text="确定"
android:id="@ id/queding"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>代码语言：javascript复制设置连接WIFI名和密码 将用户输入的WIFI名和密码保存到sp中
public class Shezhi extends AppCompatActivity {
private EditText mingzi;
private EditText mima;
private SharedPreferences sharedPreferences;
private Button button;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_shezhi);
chushihua();
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String trim = mingzi.getText().toString().trim();
String trim1 = mima.getText().toString().trim();
if (!trim.isEmpty() && !trim1.isEmpty()){
SharedPreferences.Editor edit = sharedPreferences.edit();
edit.putString("mingzi",trim);
edit.putString("mima",trim1);
edit.commit();
Toast.makeText(getApplicationContext(),"设置成功",Toast.LENGTH_SHORT).show();
finish();
}else {
Toast.makeText(getApplicationContext(),"不能为空",Toast.LENGTH_SHORT).show();
}
}
});
}
private void chushihua() {
mingzi=(EditText)findViewById(R.id.mingzi);
mima=(EditText)findViewById(R.id.mima);
button=(Button)findViewById(R.id.queding);
sharedPreferences=getSharedPreferences("wifi",0);
}
}代码语言：javascript复制WIFI连接工具类 这是一个封装好的类（用于连接WIFI的一系列操作），具体里面注释了
public class Wifigongju {
// 定义WifiManager对象
private WifiManager mWifiManager;
// 定义WifiInfo对象
private WifiInfo mWifiInfo;
// 扫描出的网络连接列表
private List<ScanResult> mWifiList;
// 网络连接列表
private List<WifiConfiguration> mWifiConfiguration;
// 定义一个WifiLock
WifiManager.WifiLock mWifiLock;
// 构造器
public Wifigongju(Context context) {
// 取得WifiManager对象
mWifiManager = (WifiManager) context
.getSystemService(Context.WIFI_SERVICE);
// 取得WifiInfo对象
mWifiInfo = mWifiManager.getConnectionInfo();
}
// 打开WIFI
public void openWifi() {
if (!mWifiManager.isWifiEnabled()) {
mWifiManager.setWifiEnabled(true);
}else {
return;
}
}
// 关闭WIFI
public void closeWifi() {
if (mWifiManager.isWifiEnabled()) {
mWifiManager.setWifiEnabled(false);
}
}
// 检查当前WIFI状态
public int checkState() {
return mWifiManager.getWifiState();
}
// 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);
}
public void startScan() {
mWifiManager.startScan();
// 得到扫描结果
mWifiList = mWifiManager.getScanResults();
// 得到配置好的网络连接
mWifiConfiguration = mWifiManager.getConfiguredNetworks();
}
// 得到网络列表
public List<ScanResult> getWifiList() {
return mWifiList;
}
// 查看扫描结果
public StringBuilder lookUpScan() {
StringBuilder stringBuilder = new StringBuilder();
for (int i = 0; i < mWifiList.size(); i ) {
stringBuilder
.append("Index_" new Integer(i 1).toString() ":");
// 将ScanResult信息转换成一个字符串包
// 其中把包括：BSSID、SSID、capabilities、frequency、level
stringBuilder.append((mWifiList.get(i)).toString());
stringBuilder.append("/n");
}
return stringBuilder;
}
// 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IP地址
public int getIPAddress() {
return (mWifiInfo == null) ? 0 : mWifiInfo.getIpAddress();
}
// 得到连接的ID
public int getNetworkId() {
return (mWifiInfo == null) ? 0 : mWifiInfo.getNetworkId();
}
// 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 boolean addNetwork(WifiConfiguration wcg) {
int wcgID = mWifiManager.addNetwork(wcg);
boolean b = mWifiManager.enableNetwork(wcgID, true);
Log.e("连接状态", String.valueOf(b));
return b;
}
// 断开指定ID的网络
public void disconnectWifi(int netId) {
mWifiManager.disableNetwork(netId);
mWifiManager.disconnect();
}
//然后是一个实际应用方法，只验证过没有密码的情况：
public WifiConfiguration CreateWifiInfo(String SSID, String Password, int Type)
{
// while (mWifiManager.getWifiState() == WifiManager.WIFI_STATE_ENABLING){
//
// try {
// Thread.currentThread();
// Thread.sleep(100);
// } catch (InterruptedException e) {
// e.printStackTrace();
// }
// }
WifiConfiguration config = new WifiConfiguration();
config.allowedAuthAlgorithms.clear();
config.allowedGroupCiphers.clear();
config.allowedKeyManagement.clear();
config.allowedPairwiseCiphers.clear();
config.allowedProtocols.clear();
config.SSID = """ SSID """;
WifiConfiguration tempConfig = this.IsExsits(SSID);
if (tempConfig != null) {
mWifiManager.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;
}
private WifiConfiguration IsExsits(String SSID)
{
while (mWifiManager.getConfiguredNetworks()==null){
try {
Thread.currentThread();
Thread.sleep(200);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
List<WifiConfiguration> existingConfigs = mWifiManager.getConfiguredNetworks();
for (WifiConfiguration existingConfig : existingConfigs) {
if (existingConfig.SSID.equals(""" SSID """)) {
return existingConfig;
}
}
return null;
}
}代码语言：javascript复制这个类是通用的只要连接WIFI就可以使用这个工具类
由于连接WIFI需要权限，所以我们需要授权
授权（z这是一个封装好的回调接口）动态授权
public class BaseActivity extends AppCompatActivity {
public interface PermissionListener {
void onGranted();//已授权
void onDenied(List<String> deniedPermission);//未授权
}
private PermissionListener mListener;
private static final int PERMISSION_REQUESTCODE = 100;
@Override
public void onCreate(Bundle savedInstanceState, PersistableBundle persistentState) {
super.onCreate(savedInstanceState, persistentState);
}
public void requestRunPermisssion(String[] permissions, PermissionListener listener){
mListener = listener;
List<String> permissionLists = new ArrayList<>();
for(String permission : permissions){
if(ContextCompat.checkSelfPermission(this, permission) != PackageManager.PERMISSION_GRANTED){
permissionLists.add(permission);
}
}
if(!permissionLists.isEmpty()){
ActivityCompat.requestPermissions(this, permissionLists.toArray(new String[permissionLists.size()]), PERMISSION_REQUESTCODE);
}else{
//表示全都授权了
mListener.onGranted();
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode){
case PERMISSION_REQUESTCODE:
if(grantResults.length > 0){
//存放没授权的权限
List<String> deniedPermissions = new ArrayList<>();
for(int i = 0; i < grantResults.length; i ){
int grantResult = grantResults[i];
String permission = permissions[i];
if(grantResult != PackageManager.PERMISSION_GRANTED){
deniedPermissions.add(permission);
}
}
if(deniedPermissions.isEmpty()){
//说明都授权了
mListener.onGranted();
}else{
mListener.onDenied(deniedPermissions);
}
}
break;
default:
break;
}
}
}代码语言：javascript复制接下来我们只需要在Main中使用
public class MainActivity extends BaseActivity {
private Button button;
private SharedPreferences sharedPreferences;
private TextView shuju;
private TextView jieguo;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
chushihua();
sharedPreferences = getSharedPreferences("wifi", 0);
dongtaishouquan();
}
private void dongtaishouquan() {
requestRunPermisssion(new String[]{Manifest.permission.CHANGE_NETWORK_STATE, Manifest.permission.CHANGE_WIFI_STATE, Manifest.permission.ACCESS_NETWORK_STATE, Manifest.permission.ACCESS_WIFI_STATE, Manifest.permission.ACCESS_FINE_LOCATION}, new PermissionListener() {
@Override
public void onGranted() {
if (sharedPreferences.getString("mingzi", "sss").equals("sss") && sharedPreferences.getString("mima", "0").equals("0")) {
shuju.setText("失败原因没有设置wifi,请点击下方按钮设置要连接的wifi");
} else {
Wifigongju wifigongju = new Wifigongju(getApplicationContext());
wifigongju.openWifi();
boolean b = wifigongju.addNetwork(wifigongju.CreateWifiInfo(sharedPreferences.getString("mingzi", "sss"), sharedPreferences.getString("mima", "0"), 3));
if (b) {
jieguo.setText("连接成功");
shuju.setText("已连接至" wifigongju.getBSSID());
} else {
jieguo.setText("连接失败");
}
}
}
@Override
public void onDenied(List<String> deniedPermission) {
}
});
}
private void chushihua () {
button = (Button) findViewById(R.id.shezhi);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startActivity(new Intent(getApplicationContext(), Shezhi.class));
}
});
shuju = (TextView) findViewById(R.id.shuju);
jieguo = (TextView) findViewById(R.id.jieguo);
}
}最后权限说明 （重要）
代码语言：javascript复制<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
<!-- //修改网络状态权限 -->
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<!-- 修改wifi状态的权限 -->
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<!-- //访问网络权限 -->
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<!-- //访问wifi权限 -->
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<!-- 定位权限 -->这些权限最好都加上，防止app炸！
学习永无止境！加油。
