在Android 2.2（Froyo）中创建Wifi热点的API调用是什么（如在“网络共享与便携式热点”设置项中看到的那样）。
Android 2.3 WiFi热点API
18
- ericyue
2
抱歉，我使用了你的代码创建了一个热点，但我的电脑无法连接到它... - ericyue
可能是Android 2.2 wifi热点API的重复问题。 - Karan Shishoo
3个回答
26
虽然没有官方API，但可以使用反射来处理。我知道有些人认为这不是推荐方式，但我认为，如果谷歌不提供API，那就随他去吧。
以下是我在应用程序中使用的活动代码，用户可以启用/禁用Wifi AP。 当您启用Wifi AP时，通常会关闭常规Wifi，因此在用户再次禁用Wifi AP后，我们将重新激活常规Wifi。
下面的代码示例取自我的一个项目，希望您能轻松理解其中的逻辑。如果您有进一步的问题，请让我知道。
该代码已在Nexus One 2.2（我认为也适用于2.3）以及三星Galaxy S（2.2）上进行了测试。
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;
}
}
}
- Mathias Conradt
4
1忽略BaseActivity，那只是一个从Activity扩展的自定义类，在这个例子中并不重要。 - Mathias Conradt
4没有官方的API，并且它们已经改变了状态码（至少从Android 2.2到4.1.1）。你需要加上10才能获得Android 4.1.1中的状态码。 - Bart Friederichs
请阅读Bart Friederichs的评论，否则您将在此行中遇到ArrayOutOfBoundExceptions：Log.d("WifiAP", "getWifiAPState.state " + (state==-1?"UNKNOWN":WIFI_STATE_TEXTSTATE[state])); - Pascal Klein
@Mathias Lin：谢谢你的代码。有没有办法获取新创建的 WiFi 热点的密码？我想通过蓝牙或 NFC 将其发送到另一个 Android 设备，以便无需用户进行任何操作即可连接到 Wifi。 - Pascal Klein
17
对于任何对在ICS上运行、设置AP名称和/或将所有WifiAP代码保留在其自己的类中感兴趣的人，我已经更新和改进了其他答案中提供的代码：
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 https://dev59.com/Jmw05IYBdhLWcg3wwEcS#7049074
*/
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 https://dev59.com/Jmw05IYBdhLWcg3wwEcS#7049074
*/
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 https://dev59.com/Jmw05IYBdhLWcg3wwEcS#7049074
*/
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 https://dev59.com/Jmw05IYBdhLWcg3wwEcS#7049074
*/
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 https://dev59.com/Jmw05IYBdhLWcg3wwEcS#7049074
*/
class SetWifiAPTask extends AsyncTask<Void, Void, Void> {
boolean mMode; //enable or disable wifi AP
boolean mFinish; //finalize or not (e.g. on exit)
ProgressDialog d;
/**
* enable/disable the wifi ap
* @param mode enable or disable wifi AP
* @param finish finalize or not (e.g. on exit)
* @param context the context of the calling activity
* @author https://dev59.com/Jmw05IYBdhLWcg3wwEcS#7049074
*/
public SetWifiAPTask(boolean mode, boolean finish, Context context) {
mMode = mode;
mFinish = finish;
d = new ProgressDialog(context);
}
/**
* do before background task runs
* @author https://dev59.com/Jmw05IYBdhLWcg3wwEcS#7049074
*/
@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 https://dev59.com/Jmw05IYBdhLWcg3wwEcS#7049074
*/
@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 https://dev59.com/Jmw05IYBdhLWcg3wwEcS#7049074
*/
@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>
- bbodenmiller
3
1@mathias 谢谢！！这个方法直接复制粘贴就可以在我的LG C710h上使用，我可以在电脑上看到网络。我也尝试在一个Galaxy S II上使用，但是它的wpa_supplicant已经打了补丁以便检测adhoc网络，但是它没有立即起作用（可能是补丁的问题）。 - methodMan
@bbodenmiller，你的代码很好用，但是你能告诉我如何使用热点共享文件吗？ - Kunu
你应该使用socket @Kunu - gumuruh
5
这个没有公共API。
- Nikolay Elenkov
网页内容由stack overflow 提供, 点击上面的可以查看英文原文，
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