java Android：以编程方式打开 WiFi 热点
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时间：2020-11-02 08:38:58 来源:igfitidea点击:
Android: Programmatically Turn on WiFi hotspot
提问by Varun Parikh
I am trying to turn on the portable Wifi hotspot ON, by referring this link:
how to set advanced settings of android wifihotspot
我正在尝试打开便携式 Wifi 热点，参考此链接：
如何设置 android wifihotspot 的高级设置
This is working well on Samsung Galaxy S3 Android v4.4.2.(no issues)
But on other devices with the same or lower Android version, the application crashes and restarts the device.
The code is as follows:
这在三星 Galaxy S3 Android v4.4.2 上运行良好。（没有问题）
但在具有相同或更低 Android 版本的其他设备上，应用程序崩溃并重新启动设备。
代码如下：
package com.android.startwifi;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import android.app.Activity;
import android.content.Context;
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiManager;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;
public class Main extends Activity {
public WifiManager wifiManager;
public Context context;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Log.i("hi1","hi");
createWifiAccessPoint();
}
private void createWifiAccessPoint() {
WifiManager wifiManager = (WifiManager)getBaseContext().getSystemService(Context.WIFI_SERVICE);
if(wifiManager.isWifiEnabled())
{
wifiManager.setWifiEnabled(false);
}
Method[] wmMethods = wifiManager.getClass().getDeclaredMethods();
boolean methodFound=false;
for(Method method: wmMethods){
if(method.getName().equals("setWifiApEnabled")){
methodFound=true;
WifiConfiguration netConfig = new WifiConfiguration();
netConfig.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN);
netConfig.allowedProtocols.set(WifiConfiguration.Protocol.RSN);
netConfig.allowedProtocols.set(WifiConfiguration.Protocol.WPA);
netConfig.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
netConfig.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
netConfig.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
netConfig.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
netConfig.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
try {
boolean apstatus=(Boolean) method.invoke(wifiManager, netConfig,true);
//statusView.setText("Creating a Wi-Fi Network \""+netConfig.SSID+"\"");
for (Method isWifiApEnabledmethod: wmMethods)
{
if(isWifiApEnabledmethod.getName().equals("isWifiApEnabled")){
while(!(Boolean)isWifiApEnabledmethod.invoke(wifiManager)){
};
for(Method method1: wmMethods){
if(method1.getName().equals("getWifiApState")){
int apstate;
apstate=(Integer)method1.invoke(wifiManager);
// netConfig=(WifiConfiguration)method1.invoke(wifi);
//statusView.append("\nSSID:"+netConfig.SSID+"\nPassword:"+netConfig.preSharedKey+"\n");
}
}
}
}
if(apstatus)
{
System.out.println("SUCCESSdddd");
//statusView.append("\nAccess Point Created!");
//finish();
//Intent searchSensorsIntent = new Intent(this,SearchSensors.class);
//startActivity(searchSensorsIntent);
}else
{
System.out.println("FAILED");
//statusView.append("\nAccess Point Creation failed!");
}
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
}
}
if(!methodFound){
//statusView.setText("Your phone's API does not contain setWifiApEnabled method to configure an access point");
}
}
@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;
}
@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();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
Permissions that I have defined in the manifest file are:
我在清单文件中定义的权限是：
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
The log file generated is as follows:
生成的日志文件如下：
09-10 18:35:01.644: D/jdwp(29752): prepping for JDWP over ADB
09-10 18:35:01.644: D/jdwp(29752): ADB transport startup
09-10 18:35:01.644: D/dalvikvm(29752): Elevating priority from 0 to -8
09-10 18:35:01.645: D/jdwp(29752): JDWP: thread running
09-10 18:35:01.645: D/jdwp(29752): acceptConnection
09-10 18:35:01.646: D/jdwp(29752): trying to receive file descriptor from ADB
09-10 18:35:01.646: D/dalvikvm(29752): zygote get thread init done
09-10 18:35:01.653: D/jdwp(29752): received file descriptor 34 from ADB
09-10 18:35:01.658: D/jdwp(29752): processIncoming
09-10 18:35:01.659: D/jdwp(29752): processIncoming
09-10 18:35:01.659: D/jdwp(29752): handlePacket : cmd=0x1, cmdSet=0xC7, len=0x13, id=0x40000040, flags=0x0, dataLen=0x8
09-10 18:35:01.661: D/jdwp(29752): processIncoming
09-10 18:35:01.661: D/jdwp(29752): handlePacket : cmd=0x1, cmdSet=0xC7, len=0x17, id=0x40000041, flags=0x0, dataLen=0xC
09-10 18:35:01.663: D/jdwp(29752): processIncoming
09-10 18:35:01.663: D/jdwp(29752): handlePacket : cmd=0x1, cmdSet=0xC7, len=0x13, id=0x40000042, flags=0x0, dataLen=0x8
09-10 18:35:01.665: D/jdwp(29752): processIncoming
09-10 18:35:01.665: D/jdwp(29752): handlePacket : cmd=0x1, cmdSet=0xC7, len=0x13, id=0x40000043, flags=0x0, dataLen=0x8
09-10 18:35:01.676: D/jdwp(29752): sendBufferedRequest : len=0x3D
09-10 18:35:01.736: D/jdwp(29752): sendBufferedRequest : len=0x45
09-10 18:35:01.754: W/asset(29752): AssetManager-->addDefaultAssets CIP path not exsit!
09-10 18:35:02.219: I/hi1(29752): hi
09-10 18:35:02.261: D/WifiManager(29752): Enter init, sThreadRefCount:0
09-10 18:35:02.268: D/WifiManager(29752): Create WifiManager handlerthread
09-10 18:35:03.599: I/System.out(29752): SUCCESSdddd
09-10 18:35:03.634: V/PhoneWindow(29752): DecorView setVisiblity: visibility = 4
09-10 18:35:03.745: V/PhoneWindow(29752): DecorView setVisiblity: visibility = 0
09-10 18:35:03.922: D/libEGL(29752): loaded /system/lib/egl/libEGL_mali.so
09-10 18:35:03.924: D/libEGL(29752): loaded /system/lib/egl/libGLESv1_CM_mali.so
09-10 18:35:03.927: D/libEGL(29752): loaded /system/lib/egl/libGLESv2_mali.so
09-10 18:35:04.111: D/OpenGLRenderer(29752): Enabling debug mode 0
09-10 18:35:10.610: E/InputEventReceiver(29752): channel '41f21f48 com.android.startwifi/com.android.startwifi.Main (client)' ~ Publisher closed input channel or an error occurred. events=0x9
Thus I have the following questions:
因此，我有以下问题：
- I would like to know why is this app behaving normally on Samsung S3
but not on other devices?
- How can I fix this issue?
- 我想知道为什么这个应用程序在三星 S3 上运行正常，但在其他设备上运行不正常？
- 我该如何解决这个问题？
回答by user1836816
I had the same issue. You must to erase the following code line:
我遇到过同样的问题。您必须擦除以下代码行：
netConfig.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
That works for me in versions 4.1.1, 4.2 and 4.3.
这在 4.1.1、4.2 和 4.3 版本中对我有用。
回答by Ahmad Aghazadeh
Try this code .I test in android 5.0.1 :
试试这个代码。我在 android 5.0.1 中测试：
public boolean setHotSpot(String SSID,String passWord){
Method[] mMethods = mWifiManager.getClass().getDeclaredMethods();
for(Method mMethod: mMethods){
if(mMethod.getName().equals("setWifiApEnabled")) {
WifiConfiguration netConfig = new WifiConfiguration();
if(passWord==""){
netConfig.SSID = SSID;
netConfig.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN);
netConfig.allowedProtocols.set(WifiConfiguration.Protocol.RSN);
netConfig.allowedProtocols.set(WifiConfiguration.Protocol.WPA);
netConfig.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
}else{
netConfig.SSID = SSID ;
netConfig.preSharedKey = passWord;
netConfig.hiddenSSID = true;
netConfig.status = WifiConfiguration.Status.ENABLED;
netConfig.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
netConfig.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
netConfig.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
netConfig.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
netConfig.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
netConfig.allowedProtocols.set(WifiConfiguration.Protocol.RSN);
netConfig.allowedProtocols.set(WifiConfiguration.Protocol.WPA);
}
try {
mMethod.invoke(mWifiManager, netConfig,false);
mWifiManager.saveConfiguration();
return true;
} catch (Exception e) {
e.getMessage();
}
}
}
return false;
}
Insert this permission in AndroidManifest:
在 AndroidManifest 中插入此权限：
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
回答by Sushanto
If you are using WPA_PSK authentication, you have to specify preSharedKey.
如果您使用 WPA_PSK 身份验证，则必须指定 preSharedKey。
netConfig.preSharedKey = "testPassword";
netConfig.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
Otherwise it will crash and restart the device.
否则它将崩溃并重新启动设备。
