Android 2.3 wifi热点API
什么是我需要在Android 2.2（Froyo）创build一个Wifi热点（如在networking共享和便携式热点设置项目中看到）的API调用。
没有官方的API，但是你可以使用reflection来处理它。 我知道有些人说，不build议，不pipe我怎么说，如果Google不想提供一个API，无论出于什么原因。
以下是我在我的应用程序中使用的一个活动的代码，用户可以启用/禁用Wifi AP。 当您启用无线接入点时，通常会closures常规的无线接入点，所以在用户再次禁用无线接入点后，我们将再次激活正常的无线接入点。
下面的代码示例取自我的一个项目，希望您可以轻松获取逻辑。 如果您还有其他问题，请告诉我。
代码在Nexus One 2.2（我想也是2.3）以及Samsung Galaxy S（2.2）上进行testing。
package com.myapp.android.activity.wifi; import android.app.ProgressDialog; import android.content.Context; import android.net.wifi.WifiConfiguration; import android.net.wifi.WifiManager; import android.os.AsyncTask; import android.os.Bundle; import android.view.View; import android.view.WindowManager; import android.widget.Button; import java.lang.reflect.Method; public class WifiAP extends BaseActivity { // boolean mIsWifiEnabled = false; private static final int WIFI_AP_STATE_UNKNOWN = -1; private static final int WIFI_AP_STATE_DISABLING = 0; private static final int WIFI_AP_STATE_DISABLED = 1; private static final int WIFI_AP_STATE_ENABLING = 2; private static final int WIFI_AP_STATE_ENABLED = 3; private static final int WIFI_AP_STATE_FAILED = 4; private final String[] WIFI_STATE_TEXTSTATE = new String[] { "DISABLING","DISABLED","ENABLING","ENABLED","FAILED" }; private WifiManager wifi; @Override protected void onCreate(Bundle icicle) { super.onCreate(icicle); setContentView(R.layout.wifi); getWindow().addFlags(WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD |WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON |WindowManager.LayoutParams.FLAG_DIM_BEHIND ); wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE); } @Override public void onResume() { super.onResume(); updateStatusDisplay(); } public void toggleWifi(View v) { boolean wifiApIsOn = getWifiAPState()==WIFI_AP_STATE_ENABLED || getWifiAPState()==WIFI_AP_STATE_ENABLING; new SetWifiAPTask(!wifiApIsOn,false).execute(); } public void close(View v) { boolean wifiApIsOn = getWifiAPState()==WIFI_AP_STATE_ENABLED || getWifiAPState()==WIFI_AP_STATE_ENABLING; if (wifiApIsOn) { new SetWifiAPTask(false,true).execute(); } else { finish(); } } /** * Endable/disable wifi * @param enabled * @return WifiAP state */ private int setWifiApEnabled(boolean enabled) { Log.d("WifiAP", "*** setWifiApEnabled CALLED **** " + enabled); if (enabled && wifi.getConnectionInfo() !=null) { wifi.setWifiEnabled(false); try {Thread.sleep(1500);} catch (Exception e) {} } //int duration = Toast.LENGTH_LONG; //String toastText = "MobileAP status: "; int state = WIFI_AP_STATE_UNKNOWN; try { wifi.setWifiEnabled(false); Method method1 = wifi.getClass().getMethod("setWifiApEnabled", WifiConfiguration.class, boolean.class); method1.invoke(wifi, null, enabled); // true Method method2 = wifi.getClass().getMethod("getWifiApState"); state = (Integer) method2.invoke(wifi); } catch (Exception e) { Log.e(WIFI_SERVICE, e.getMessage()); // toastText += "ERROR " + e.getMessage(); } if (!enabled) { int loopMax = 10; while (loopMax>0 && (getWifiAPState()==WIFI_AP_STATE_DISABLING || getWifiAPState()==WIFI_AP_STATE_ENABLED || getWifiAPState()==WIFI_AP_STATE_FAILED)) { try {Thread.sleep(500);loopMax--;} catch (Exception e) {} } wifi.setWifiEnabled(true); } else if (enabled) { int loopMax = 10; while (loopMax>0 && (getWifiAPState()==WIFI_AP_STATE_ENABLING || getWifiAPState()==WIFI_AP_STATE_DISABLED || getWifiAPState()==WIFI_AP_STATE_FAILED)) { try {Thread.sleep(500);loopMax--;} catch (Exception e) {} } } return state; } private int getWifiAPState() { int state = WIFI_AP_STATE_UNKNOWN; try { Method method2 = wifi.getClass().getMethod("getWifiApState"); state = (Integer) method2.invoke(wifi); } catch (Exception e) {} Log.d("WifiAP", "getWifiAPState.state " + (state==-1?"UNKNOWN":WIFI_STATE_TEXTSTATE[state])); return state; } private void updateStatusDisplay() { if (getWifiAPState()==WIFI_AP_STATE_ENABLED || getWifiAPState()==WIFI_AP_STATE_ENABLING) { ((Button)findViewById(R.id.btnWifiToggle)).setText("Turn off"); findViewById(R.id.bg).setBackgroundResource(R.drawable.bg_wifi_on); } else { ((Button)findViewById(R.id.btnWifiToggle)).setText("Turn on"); findViewById(R.id.bg).setBackgroundResource(R.drawable.bg_wifi_off); } } class SetWifiAPTask extends AsyncTask<Void, Void, Void> { boolean mMode; boolean mFinish; public SetWifiAPTask(boolean mode, boolean finish) { mMode = mode; mFinish = finish; } ProgressDialog d = new ProgressDialog(WifiAP.this); @Override protected void onPreExecute() { super.onPreExecute(); d.setTitle("Turning WiFi AP " + (mMode?"on":"off") + "..."); d.setMessage("...please wait a moment."); d.show(); } @Override protected void onPostExecute(Void aVoid) { super.onPostExecute(aVoid); try {d.dismiss();} catch (IllegalArgumentException e) {}; updateStatusDisplay(); if (mFinish) finish(); } @Override protected Void doInBackground(Void... params) { setWifiApEnabled(mMode); return null; } } } 对于那些有兴趣在ICS上工作的人，设置你的AP名字，和/或保留所有的WifiAP代码在自己的类中，我已经更新和改进了在另一个答案给出的代码：
WifiAP.java：
package com.demo.wifiap; import android.app.Activity; import android.app.ProgressDialog; import android.content.Context; import android.net.wifi.WifiConfiguration; import android.net.wifi.WifiManager; import android.os.AsyncTask; import android.util.Log; import java.lang.reflect.Method; import com.demo.WifiAPActivity; /** * Handle enabling and disabling of WiFi AP * @author http://stackoverflow.com/a/7049074/1233435 */ public class WifiAP extends Activity { private static int constant = 0; private static final int WIFI_AP_STATE_UNKNOWN = -1; private static int WIFI_AP_STATE_DISABLING = 0; private static int WIFI_AP_STATE_DISABLED = 1; public int WIFI_AP_STATE_ENABLING = 2; public int WIFI_AP_STATE_ENABLED = 3; private static int WIFI_AP_STATE_FAILED = 4; private final String[] WIFI_STATE_TEXTSTATE = new String[] { "DISABLING","DISABLED","ENABLING","ENABLED","FAILED" }; private WifiManager wifi; private String TAG = "WifiAP"; private int stateWifiWasIn = -1; private boolean alwaysEnableWifi = true; //set to false if you want to try and set wifi state back to what it was before wifi ap enabling, true will result in the wifi always being enabled after wifi ap is disabled /** * Toggle the WiFi AP state * @param wifihandler * @author http://stackoverflow.com/a/7049074/1233435 */ public void toggleWiFiAP(WifiManager wifihandler, Context context) { if (wifi==null){ wifi = wifihandler; } boolean wifiApIsOn = getWifiAPState()==WIFI_AP_STATE_ENABLED || getWifiAPState()==WIFI_AP_STATE_ENABLING; new SetWifiAPTask(!wifiApIsOn,false,context).execute(); } /** * Enable/disable wifi * @param true or false * @return WifiAP state * @author http://stackoverflow.com/a/7049074/1233435 */ private int setWifiApEnabled(boolean enabled) { Log.d(TAG, "*** setWifiApEnabled CALLED **** " + enabled); WifiConfiguration config = new WifiConfiguration(); config.SSID = "My AP"; config.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN); //remember wirelesses current state if (enabled && stateWifiWasIn==-1){ stateWifiWasIn=wifi.getWifiState(); } //disable wireless if (enabled && wifi.getConnectionInfo() !=null) { Log.d(TAG, "disable wifi: calling"); wifi.setWifiEnabled(false); int loopMax = 10; while(loopMax>0 && wifi.getWifiState()!=WifiManager.WIFI_STATE_DISABLED){ Log.d(TAG, "disable wifi: waiting, pass: " + (10-loopMax)); try { Thread.sleep(500); loopMax--; } catch (Exception e) { } } Log.d(TAG, "disable wifi: done, pass: " + (10-loopMax)); } //enable/disable wifi ap int state = WIFI_AP_STATE_UNKNOWN; try { Log.d(TAG, (enabled?"enabling":"disabling") +" wifi ap: calling"); wifi.setWifiEnabled(false); Method method1 = wifi.getClass().getMethod("setWifiApEnabled", WifiConfiguration.class, boolean.class); //method1.invoke(wifi, null, enabled); // true method1.invoke(wifi, config, enabled); // true Method method2 = wifi.getClass().getMethod("getWifiApState"); state = (Integer) method2.invoke(wifi); } catch (Exception e) { Log.e(WIFI_SERVICE, e.getMessage()); // toastText += "ERROR " + e.getMessage(); } //hold thread up while processing occurs if (!enabled) { int loopMax = 10; while (loopMax>0 && (getWifiAPState()==WIFI_AP_STATE_DISABLING || getWifiAPState()==WIFI_AP_STATE_ENABLED || getWifiAPState()==WIFI_AP_STATE_FAILED)) { Log.d(TAG, (enabled?"enabling":"disabling") +" wifi ap: waiting, pass: " + (10-loopMax)); try { Thread.sleep(500); loopMax--; } catch (Exception e) { } } Log.d(TAG, (enabled?"enabling":"disabling") +" wifi ap: done, pass: " + (10-loopMax)); //enable wifi if it was enabled beforehand //this is somewhat unreliable and app gets confused and doesn't turn it back on sometimes so added toggle to always enable if you desire if(stateWifiWasIn==WifiManager.WIFI_STATE_ENABLED || stateWifiWasIn==WifiManager.WIFI_STATE_ENABLING || stateWifiWasIn==WifiManager.WIFI_STATE_UNKNOWN || alwaysEnableWifi){ Log.d(TAG, "enable wifi: calling"); wifi.setWifiEnabled(true); //don't hold things up and wait for it to get enabled } stateWifiWasIn = -1; } else if (enabled) { int loopMax = 10; while (loopMax>0 && (getWifiAPState()==WIFI_AP_STATE_ENABLING || getWifiAPState()==WIFI_AP_STATE_DISABLED || getWifiAPState()==WIFI_AP_STATE_FAILED)) { Log.d(TAG, (enabled?"enabling":"disabling") +" wifi ap: waiting, pass: " + (10-loopMax)); try { Thread.sleep(500); loopMax--; } catch (Exception e) { } } Log.d(TAG, (enabled?"enabling":"disabling") +" wifi ap: done, pass: " + (10-loopMax)); } return state; } /** * Get the wifi AP state * @return WifiAP state * @author http://stackoverflow.com/a/7049074/1233435 */ public int getWifiAPState() { int state = WIFI_AP_STATE_UNKNOWN; try { Method method2 = wifi.getClass().getMethod("getWifiApState"); state = (Integer) method2.invoke(wifi); } catch (Exception e) { } if(state>=10){ //using Android 4.0+ (or maybe 3+, haven't had a 3 device to test it on) so use states that are +10 constant=10; } //reset these in case was newer device WIFI_AP_STATE_DISABLING = 0+constant; WIFI_AP_STATE_DISABLED = 1+constant; WIFI_AP_STATE_ENABLING = 2+constant; WIFI_AP_STATE_ENABLED = 3+constant; WIFI_AP_STATE_FAILED = 4+constant; Log.d(TAG, "getWifiAPState.state " + (state==-1?"UNKNOWN":WIFI_STATE_TEXTSTATE[state-constant])); return state; } /** * the AsyncTask to enable/disable the wifi ap * @author http://stackoverflow.com/a/7049074/1233435 */ class SetWifiAPTask extends AsyncTask<Void, Void, Void> { boolean mMode; //enable or disable wifi AP boolean mFinish; //finalize or not (eg on exit) ProgressDialog d; /** * enable/disable the wifi ap * @param mode enable or disable wifi AP * @param finish finalize or not (eg on exit) * @param context the context of the calling activity * @author http://stackoverflow.com/a/7049074/1233435 */ public SetWifiAPTask(boolean mode, boolean finish, Context context) { mMode = mode; mFinish = finish; d = new ProgressDialog(context); } /** * do before background task runs * @author http://stackoverflow.com/a/7049074/1233435 */ @Override protected void onPreExecute() { super.onPreExecute(); d.setTitle("Turning WiFi AP " + (mMode?"on":"off") + "..."); d.setMessage("...please wait a moment."); d.show(); } /** * do after background task runs * @param aVoid * @author http://stackoverflow.com/a/7049074/1233435 */ @Override protected void onPostExecute(Void aVoid) { super.onPostExecute(aVoid); try { d.dismiss(); WifiAPActivity.updateStatusDisplay(); } catch (IllegalArgumentException e) { }; if (mFinish){ finish(); } } /** * the background task to run * @param params * @author http://stackoverflow.com/a/7049074/1233435 */ @Override protected Void doInBackground(Void... params) { setWifiApEnabled(mMode); return null; } } }
WifiAPActivity.java：
package com.demo; import android.app.Activity; import android.content.Context; import android.net.wifi.WifiManager; import android.os.Bundle; import android.view.View; import android.view.WindowManager; import android.widget.Button; import com.demo.WifiAP; public class WifiAPActivity extends Activity { //private String TAG = "WifiAPActivity"; boolean wasAPEnabled = false; static WifiAP wifiAp; private WifiManager wifi; static Button btnWifiToggle; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.wifi); btnWifiToggle = (Button) findViewById(R.id.btnWifiToggle); wifiAp = new WifiAP(); wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE); btnWifiToggle.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { wifiAp.toggleWiFiAP(wifi, WifiAPActivity.this); } }); getWindow().addFlags(WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD|WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON|WindowManager.LayoutParams.FLAG_DIM_BEHIND); } @Override public void onResume() { super.onResume(); if (wasAPEnabled) { if (wifiAp.getWifiAPState()!=wifiAp.WIFI_AP_STATE_ENABLED && wifiAp.getWifiAPState()!=wifiAp.WIFI_AP_STATE_ENABLING){ wifiAp.toggleWiFiAP(wifi, WifiAPActivity.this); } } updateStatusDisplay(); } @Override public void onPause() { super.onPause(); boolean wifiApIsOn = wifiAp.getWifiAPState()==wifiAp.WIFI_AP_STATE_ENABLED || wifiAp.getWifiAPState()==wifiAp.WIFI_AP_STATE_ENABLING; if (wifiApIsOn) { wasAPEnabled = true; wifiAp.toggleWiFiAP(wifi, WifiAPActivity.this); } else { wasAPEnabled = false; } updateStatusDisplay(); } public static void updateStatusDisplay() { if (wifiAp.getWifiAPState()==wifiAp.WIFI_AP_STATE_ENABLED || wifiAp.getWifiAPState()==wifiAp.WIFI_AP_STATE_ENABLING) { btnWifiToggle.setText("Turn off"); //findViewById(R.id.bg).setBackgroundResource(R.drawable.bg_wifi_on); } else { btnWifiToggle.setText("Turn on"); //findViewById(R.id.bg).setBackgroundResource(R.drawable.bg_wifi_off); } } }
wifi.xml：
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <Button android:id="@+id/btnWifiToggle" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Button" /> </LinearLayout>
权限：
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission> <uses-permission android:name="android.permission.CHANGE_WIFI_STATE"></uses-permission>
没有公共的API。
