Android：以编程方式启用WiFi热点
我想通过引用此链接打开便携式Wifi热点ON：
如何设置android wifihotspot的高级设置
这在三星Galaxy S3 Android v4.4.2上运行良好。（没有问题）
但是在具有相同或更低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); } } 我在清单文件中定义的权限是：
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
因此，我有以下问题：
- 我想知道为什么这个应用程序在Samsung S3上正常运行但在其他设备上没有？
- 我该如何解决这个问题？
我遇到过同样的问题。 您必须删除以下代码行：
netConfig.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
这在版本4.1.1,4.2和4.3中适用于我。
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; }
在AndroidManifest中插入此权限：
如果您使用WPA_PSK身份validation，则必须指定preSharedKey。
netConfig.preSharedKey = "testPassword"; netConfig.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
否则会崩溃并重启设备。