问题描述
我需要在 Android 2.2 (Froyo) 中调用什么 API 来创建 Wifi 热点(如网络共享和便携式热点设置项中所示).
What is the API call I need to make in Android 2.2 (Froyo) to create a Wifi hotspot (as seen in the Tethering and Portable Hotspot settings item).
推荐答案
官方没有API，但是可以使用反射来处理.我知道有人说，不建议这样做，但恕我直言，如果 Google 出于任何原因不想提供 API，那就搞砸吧.
There is no official API, but you can use reflection to handle it. I know some say, it's not recommended, however imho I say, screw it if Google doesn't want to provide an API for whatever reason.
以下是我在应用程序中使用的活动代码，用户可以在其中启用/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，我们将再次激活常规 Wifi.
Below is the code of an activity I used in my application, where the user can enable/disable the Wifi AP.When you enable Wifi AP, usually the regular Wifi will be turned off, so after the user disables the Wifi AP again, we'll be activating regular wifi again.
下面的代码示例取自我的一个项目，希望您能轻松掌握其中的逻辑.如果您还有其他问题，请告诉我.
The code sample below is taken from one of my projects, hope you can get the logic there easily. Let me know if you have further questions.
代码在 Nexus One 2.2(我认为也是 2.3)以及三星 Galaxy S (2.2) 上进行了测试.
Code is tested on Nexus One 2.2 (and I think also 2.3) as well as on Samsung Galaxy S (2.2).
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;
}
}
}
这篇关于Android 2.3 wifi热点API的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！