Android Portable hotspot Open State detection and SSID acquisition
Last Update:2017-01-12
Source: Internet
Author: User
<span id="Label3"></p><p><p><span style="font-size: 16px">How does the WiFi hotspot open and the SSID after it is opened?</span></p></p><p><p><span style="font-size: 16px"></span></p></p><p><p><span style="font-size: 16px">Open the Wifimanager.java source code, you can find the Getwifiapstate () method, the surprise found that the direct call to this method can get to the state of the hotspot, however, when the call is not called to this method ... This method is hidden, and I am currently calling through Reflection.</span></p></p><p><p></p></p><pre><span style="color: #008000"><span style="color: #008000">/**</span></span><span style="color: #008000"><span style="color: #008000">* Gets the Wi-fi enabled State. * </span></span><span style="color: #808080"><span style="color: #808080">@return</span></span><span style="color: #008000">One of <span style="color: #008000">{</span></span><span style="color: #808080"><span style="color: #808080">@link</span></span><span style="color: #008000"><span style="color: #008000">#WIFI_AP_STATE_DISABLED}, * {</span></span><span style="color: #808080"><span style="color: #808080">@link</span></span><span style="color: #008000"><span style="color: #008000">#WIFI_AP_STATE_DISABLING}, {</span></span><span style="color: #808080"><span style="color: #808080">@link</span></span><span style="color: #008000"><span style="color: #008000">#WIFI_AP_STATE_ENABLED}, * {</span></span><span style="color: #808080"><span style="color: #808080">@link</span></span><span style="color: #008000"><span style="color: #008000">#WIFI_AP_STATE_ENABLING}, {</span></span><span style="color: #808080"><span style="color: #808080">@link</span></span><span style="color: #008000"><span style="color: #008000">#WIFI_AP_STATE_FAILED} *</span></span><span style="color: #808080"><span style="color: #808080">@see</span></span><span style="color: #008000"><span style="color: #008000">#isWifiApEnabled () * * @hide Dont Open Yet</span></span><span style="color: #008000"><span style="color: #008000">*/</span></span> <span style="color: #0000ff"><span style="color: #0000ff"></span> public</span> <span style="color: #0000ff"><span style="color: #0000ff">int</span></span><span style="color: #000000"><span style="color: #000000">getwifiapstate () {</span></span><span style="color: #0000ff"><span style="color: #0000ff">Try</span></span><span style="color: #000000"><span style="color: #000000"> { </span></span><span style="color: #0000ff"><span style="color: #0000ff">return</span></span><span style="color: #000000"><span style="color: #000000">mservice.getwifiapenabledstate (); } </span></span><span style="color: #0000ff"><span style="color: #0000ff">Catch</span></span><span style="color: #000000"><span style="color: #000000">(remoteexception E) {</span></span><span style="color: #0000ff"><span style="color: #0000ff">return</span></span><span style="color: #000000"><span style="color: #000000">wifi_ap_state_failed; } }</span></span></pre><p><p></p></p><p><p><span style="font-size: 16px">So I wrote a radiation to get the state of the hot Spot.</span></p></p><p><p></p></p><pre> <span style="color: #0000ff"><span style="color: #0000ff"></span> public</span> <span style="color: #0000ff"><span style="color: #0000ff">Static</span></span> <span style="color: #0000ff"><span style="color: #0000ff">Boolean</span></span><span style="color: #000000"><span style="color: #000000">Iswifiapopen (context Context) {</span></span><span style="color: #0000ff"><span style="color: #0000ff">Try</span></span><span style="color: #000000"><span style="color: #000000">{wifimanager Manager</span></span>=<span style="color: #000000"><span style="color: #000000">(wifimanager) Context.getsystemservice (context.wifi_service); </span></span><span style="color: #008000"><span style="color: #008000">//</span></span><span style="color: #008000"><span style="color: #008000">obtaining the Getwifiapstate () method by radiation</span></span>method = Manager.getclass (). Getdeclaredmethod ("getwifiapstate"<span style="color: #000000"><span style="color: #000000">); </span></span><span style="color: #008000"><span style="color: #008000">//</span></span><span style="color: #008000"><span style="color: #008000">call Getwifiapstate () to get the return value</span></span> <span style="color: #0000ff"><span style="color: #0000ff">int</span></span>State = (<span style="color: #0000ff"><span style="color: #0000ff">int</span></span><span style="color: #000000"><span style="color: #000000">) Method.invoke (manager); </span></span><span style="color: #008000"><span style="color: #008000">//</span></span><span style="color: #008000"><span style="color: #008000">get the open state property of Wifi_ap by radiation</span></span>Field field = Manager.getclass (). Getdeclaredfield ("wifi_ap_state_enabled"<span style="color: #000000"><span style="color: #000000">); </span></span><span style="color: #008000"><span style="color: #008000">//</span></span><span style="color: #008000"><span style="color: #008000">Get Property value</span></span> <span style="color: #0000ff"><span style="color: #0000ff">int</span></span>Value = (<span style="color: #0000ff"><span style="color: #0000ff">int</span></span><span style="color: #000000"><span style="color: #000000">) Field.get (manager); </span></span><span style="color: #008000"><span style="color: #008000">//</span></span><span style="color: #008000"><span style="color: #008000">decide whether to open</span></span> <span style="color: #0000ff"><span style="color: #0000ff">if</span></span>(state = =<span style="color: #000000"><span style="color: #000000">Value) { </span></span><span style="color: #0000ff"><span style="color: #0000ff">return</span></span> <span style="color: #0000ff"><span style="color: #0000ff">true</span></span><span style="color: #000000"><span style="color: #000000">; } </span></span><span style="color: #0000ff"><span style="color: #0000ff">Else</span></span><span style="color: #000000"><span style="color: #000000"> { </span></span><span style="color: #0000ff"><span style="color: #0000ff">return</span></span> <span style="color: #0000ff"><span style="color: #0000ff">false</span></span><span style="color: #000000"><span style="color: #000000">; } } </span></span><span style="color: #0000ff"><span style="color: #0000ff">Catch</span></span><span style="color: #000000"><span style="color: #000000">(nosuchmethodexception E) {e.printstacktrace (); } </span></span><span style="color: #0000ff"><span style="color: #0000ff">Catch</span></span><span style="color: #000000"><span style="color: #000000">(illegalaccessexception E) {e.printstacktrace (); } </span></span><span style="color: #0000ff"><span style="color: #0000ff">Catch</span></span><span style="color: #000000"><span style="color: #000000">(invocationtargetexception E) {e.printstacktrace (); } </span></span><span style="color: #0000ff"><span style="color: #0000ff">Catch</span></span><span style="color: #000000"><span style="color: #000000">(nosuchfieldexception E) {e.printstacktrace (); } </span></span><span style="color: #0000ff"><span style="color: #0000ff">return</span></span> <span style="color: #0000ff"><span style="color: #0000ff">false</span></span><span style="color: #000000"><span style="color: #000000">; }</span></span></pre><p><p></p></p><p><p><span style="font-size: 16px">Using the Getwifiapstate () method to return the value of the comment, you can find the following states, get the current status value, only need to compare the values of various states, you know the open state of the hotspot</span></p></p><pre><pre> * @<span style="color: #0000ff">return</span> one<span style="color: #000000"> of {@link #WIFI_STATE_DISABLED}, </span>*<span style="color: #000000"> {@link #WIFI_STATE_DISABLING}, {@link # wifi_state_enabled}, </span>* {@link #WIFI_STATE_ENABLING}, {@link #WIFI_STATE_UNKNOWN}</pre></pre><p><p></p></p><p><p><span style="font-size: 16px">similarly, the SSID that gets to the hotspot through reflection</span></p></p><p><p><span style="font-size: 16px"></span></p></p><pre> <span style="color: #0000ff"><span style="color: #0000ff">Try</span></span><span style="color: #000000"><span style="color: #000000">{wifimanager Manager</span></span>= (wifimanager)<span style="color: #0000ff"><span style="color: #0000ff"></span> this</span><span style="color: #000000"><span style="color: #000000">. Getsystemservice (context.wifi_service); </span></span><span style="color: #008000"><span style="color: #008000">//</span></span><span style="color: #008000"><span style="color: #008000">Get the Getwifiapconfiguration () method</span></span>method = Manager.getclass (). Getdeclaredmethod ("getwifiapconfiguration"<span style="color: #000000"><span style="color: #000000">); </span></span><span style="color: #008000"><span style="color: #008000">//</span></span><span style="color: #008000"><span style="color: #008000">Call the Getwifiapconfiguration () method to get the wificonfiguration to the hotspot</span></span>Wificonfiguration configuration =<span style="color: #000000"><span style="color: #000000">(wificonfiguration) Method.invoke (manager); SSID</span></span>=<span style="color: #000000"><span style="color: #000000">Configuration. SSID; } </span></span><span style="color: #0000ff"><span style="color: #0000ff">Catch</span></span><span style="color: #000000"><span style="color: #000000">(nosuchmethodexception E) {e.printstacktrace (); } </span></span><span style="color: #0000ff"><span style="color: #0000ff">Catch</span></span><span style="color: #000000"><span style="color: #000000">(invocationtargetexception E) {e.printstacktrace (); } </span></span><span style="color: #0000ff"><span style="color: #0000ff">Catch</span></span><span style="color: #000000"><span style="color: #000000">(illegalaccessexception E) {e.printstacktrace (); }</span></span></pre><p><p></p></p><p><p>Android Portable hotspot Open State detection and SSID acquisition</p></p></span>
