如何以编程方式连接到 WiFi

问题描述

我正在尝试使用应用程序连接到新的 wifi 网络，而不是使用以下代码的 android wifi 设置，但似乎相关的 android sdk 类只允许您连接到已存储在 android 中的网络，而不是任何新网络.我的想法正确吗?

I am trying to connect to a new wifi network using an app and not android wifi settings with following code, but it seems that relevant android sdk classes only let you connect to network already stored in android and not to any new network. Am i being correct in thinking that?

这是我的代码

清单 XML:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="unitedspark.testapp" >
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name=".WiFiConnect"
        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>
<receiver android:name=".WiFiChangeReciever" >
    <intent-filter>
        <action android:name="android.net.wifi.STATE_CHANGE" />
        <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
    </intent-filter>
</receiver>
</manifest>

活动 XML:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".WiFiConnect"
android:id="@+id/WiFiConnectLayout">

<TextView
    android:id="@+id/Connect"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Connect To"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:layout_marginTop="63dp"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true" />

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="New WiFi Network"
    android:id="@+id/btnConnectNetwork1"
    android:layout_alignTop="@+id/btnDisconnect"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true" />

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Disconnect"
    android:id="@+id/btnDisconnect"
    android:layout_marginTop="108dp"
    android:layout_below="@+id/btnConnectNetwork1"
    android:layout_toRightOf="@+id/btnConnectNetwork1"
    android:layout_toEndOf="@+id/btnConnectNetwork1" />

<TextView
    android:id="@+id/txtStatus"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="WiFi Status"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:layout_marginTop="67dp"
    android:layout_below="@+id/btnDisconnect"
    android:layout_centerHorizontal="true" />

java文件:

package unitedspark.testapp;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import java.util.Arrays;
import java.util.List;


public class WiFiConnect extends ActionBarActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_wi_fi_connect);

    this.registerReceiver(this.mConnReceiver, new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION));

    Button btnConnectNetwork1 = (Button) findViewById(R.id.btnConnectNetwork1);
    btnConnectNetwork1.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            // Perform action on click
            TextView txtStatus = (TextView)findViewById(R.id.txtStatus);

            WifiManager wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);
            if(!wifi.isWifiEnabled()) {
                wifi.setWifiEnabled(true);
            }

            txtStatus.setText("Trying to connect...");

            ConnectToNetworkWEP("SSID1", "Password1");
        }
    });

    Button btnDisconnect = (Button) findViewById(R.id.btnDisconnect);
    btnDisconnect.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            // Perform action on click
            TextView txtStatus = (TextView)findViewById(R.id.txtStatus);
            txtStatus.setText("Trying to disconnect...");

            WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
            wifiManager.disconnect();
            wifiManager.setWifiEnabled(false);
            txtStatus.setText("Disconnected!");
        }
    });


}

private BroadcastReceiver mConnReceiver = new BroadcastReceiver() {
    public void onReceive(Context context, Intent intent) {

        NetworkInfo currentNetworkInfo = intent.getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO);

        if (currentNetworkInfo.isConnected()) {
            WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
            WifiInfo wifiInfo = wifiManager.getConnectionInfo();

            Toast.makeText(getApplicationContext(), "Broadcast Connected:" +  wifiInfo.getSSID(), Toast.LENGTH_LONG).show();
        } else {
            Toast.makeText(getApplicationContext(), "Broadcast Not Connected", Toast.LENGTH_LONG).show();
        }
    }
};


@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_wi_fi_connect, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
        return true;
    }

    return super.onOptionsItemSelected(item);
}

public boolean ConnectToNetworkWEP( String networkSSID, String password )
{
    try {
        WifiConfiguration conf = new WifiConfiguration();
        conf.SSID = """ + networkSSID + """;   // Please note the quotes. String should contain SSID in quotes
        conf.wepKeys[0] = password;  //WEP password is in hex, we do not need to surround it with quotes.
        conf.wepTxKeyIndex = 0;
        conf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
        conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40);

        WifiManager wifiManager = (WifiManager) this.getApplicationContext().getSystemService(Context.WIFI_SERVICE);
        wifiManager.addNetwork(conf);

        List<WifiConfiguration> list = wifiManager.getConfiguredNetworks();
        for( WifiConfiguration i : list ) {
            if(i.SSID != null && i.SSID.equals(""" + networkSSID + """)) {
                wifiManager.disconnect();
                wifiManager.enableNetwork(i.networkId, true);
                wifiManager.reconnect();

                    break;
            }
        }

        //WiFi Connection success, return true
        return true;
    } catch (Exception ex) {
        System.out.println(Arrays.toString(ex.getStackTrace()));
        return false;
    }
}
}

推荐答案

我刚刚通过 WPA2 身份验证与我的家庭 WiFi 网络配合使用.

I just got this working with my home WiFi network with WPA2 authentication.

您的断开连接代码可以正常工作.我能够通过按钮反复连接和断开连接.

Your disconnect code works fine as is. I was able to repeatedly connect and disconnect with the buttons.

对于您的 WEP 网络，试试这个:

For your WEP network, try this:

public boolean ConnectToNetworkWEP( String networkSSID, String password )
{
    try {
        WifiConfiguration conf = new WifiConfiguration();
        conf.SSID = """ + networkSSID + """;   // Please note the quotes. String should contain SSID in quotes
        conf.wepKeys[0] = """ + password + """; //Try it with quotes first

        conf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
        conf.allowedGroupCiphers.set(WifiConfiguration.AuthAlgorithm.OPEN);
        conf.allowedGroupCiphers.set(WifiConfiguration.AuthAlgorithm.SHARED);


        WifiManager wifiManager = (WifiManager) this.getApplicationContext().getSystemService(Context.WIFI_SERVICE);
        int networkId = wifiManager.addNetwork(conf);

        if (networkId == -1){
            //Try it again with no quotes in case of hex password
            conf.wepKeys[0] = password;
            networkId = wifiManager.addNetwork(conf);
        }

        List<WifiConfiguration> list = wifiManager.getConfiguredNetworks();
        for( WifiConfiguration i : list ) {
            if(i.SSID != null && i.SSID.equals(""" + networkSSID + """)) {
                wifiManager.disconnect();
                wifiManager.enableNetwork(i.networkId, true);
                wifiManager.reconnect();
                break;
            }
        }

        //WiFi Connection success, return true
        return true;
    } catch (Exception ex) {
        System.out.println(Arrays.toString(ex.getStackTrace()));
        return false;
    }
}

这是在 WPA2 上对我有用的代码:

Here is the code that worked for me on WPA2:

public boolean ConnectToNetworkWPA( String networkSSID, String password )
    {
        try {
            WifiConfiguration conf = new WifiConfiguration();
            conf.SSID = """ + networkSSID + """;   // Please note the quotes. String should contain SSID in quotes

            conf.preSharedKey = """ + password + """;

            conf.status = WifiConfiguration.Status.ENABLED;
            conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
            conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
            conf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
            conf.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
            conf.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);

            Log.d("connecting", conf.SSID + " " + conf.preSharedKey);

            WifiManager wifiManager = (WifiManager) this.getApplicationContext().getSystemService(Context.WIFI_SERVICE);
            wifiManager.addNetwork(conf);

            Log.d("after connecting", conf.SSID + " " + conf.preSharedKey);



            List<WifiConfiguration> list = wifiManager.getConfiguredNetworks();
            for( WifiConfiguration i : list ) {
                if(i.SSID != null && i.SSID.equals(""" + networkSSID + """)) {
                    wifiManager.disconnect();
                    wifiManager.enableNetwork(i.networkId, true);
                    wifiManager.reconnect();
                    Log.d("re connecting", i.SSID + " " + conf.preSharedKey);

                    break;
                }
            }


            //WiFi Connection success, return true
            return true;
        } catch (Exception ex) {
            System.out.println(Arrays.toString(ex.getStackTrace()));
            return false;
        }
    }

这篇关于如何以编程方式连接到 WiFi的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！