18
Android 2.2（Froyo）でWifiホットスポットを作成するために必要なAPI呼び出し（Tethering and Portable Hotspot設定項目に表示されているとおり）とは何ですか？Android 2.3 wifiホットスポットAPI
A
答えて
26
公式のAPIはありませんが、リフレクションを使用してそれを処理できます。私はいくつか言う、それは推奨されていないが、私は言っているが、私は何か理由でAPIを提供することを望んでいない場合は、それをねじ込むと言う。
以下は、ユーザーがWi-Fi APを有効/無効にできるアプリケーションで使用したアクティビティのコードです。 Wifi APを有効にすると通常通常のWifiはオフになるので、ユーザーがWifi APを再び無効にすると、再びWi-Fiをアクティブにします。
以下のコードサンプルは、私のプロジェクトの1つから抜粋したものです。簡単にロジックを取得できることを願っています。さらに質問がある場合はお知らせください。
コードはNexus One 2.2（また、私も2.3と思う）とSamsung Galaxy S（2.2）でテストされています。この、ICSに取り組んで自分のAP名の設定、および/または独自のクラス内のすべてのWifiAPコードを保ち得ることに興味がある人々のために
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;
}
}
}
5
このための公開APIはありません。
17
私は他の回答に与えられたコードに更新され、改善されています
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 (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 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);
}
}
}
WIF i.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>
権限：
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission>
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"></uses-permission>
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申し訳ありませんが、私はあなたのコードを使用してホットスポットを作成しますが、私のPCは...それに[アンドロイド2.2 WiFiホットスポットのAPI]の – ericyue
可能な複製を接続することはできません（https://stackoverflow.com/questions/3023226/android-2-2-wifi-hotspot-api） – casualcoder