Android 开启热点

1.高于Android8.0 开启热点

下面展示一些 内联代码片。

@RequiresApi(api = Build.VERSION_CODES.O)
    private void openApSystemO(final Callbak callbak) {
        if (isApOpen()) {
            if (!TextUtils.isEmpty(sid) && !TextUtils.isEmpty(pwd)) {
                callbak.onConnected("", sid, pwd);
                return;
            }
            //如果是自己开的可以关
            closeAp();
        }
        //关不掉，让用户关
        if (isApOpen()) {
           Log.e("TAG","热点关闭失败");
            callbak.onConnected("close wifi ap first please", null, null);
            return;
        }
        getWifiMgr().startLocalOnlyHotspot(new WifiManager.LocalOnlyHotspotCallback() {
            @Override
            public void onStarted(WifiManager.LocalOnlyHotspotReservation reservation) {
                mReservation = reservation;
                sid = reservation.getWifiConfiguration().SSID;
                pwd = reservation.getWifiConfiguration().preSharedKey;
                callbak.onConnected("", sid, pwd);
            }

            @Override
            public void onStopped() {
                mReservation = null;
                sid = "";
                pwd = "";
            }

            @Override
            public void onFailed(int reason) {
                sid = "";
                pwd = "";
                callbak.onConnected("wifi ap is failed to open", null, null);
            }
        }, new Handler());
    }

2.低于Android8.0 开启热点
下面展示一些 内联代码片。

private void openApBelow8(Callbak callbak) {
        if (getWifiMgr().isWifiEnabled()) {
            //如果wifi处于打开状态，则关闭wifi,
            getWifiMgr().setWifiEnabled(false);
        }
        if (isApOpen()) {
            sid = getApSSID();
            pwd = getApPassword();
            if (!TextUtils.isEmpty(sid) && !TextUtils.isEmpty(pwd)) {
                callbak.onConnected("", sid, pwd);
                return;
            } else {
                sid = "";
                pwd = "";
            }
        }

        WifiConfiguration config = new WifiConfiguration();
        config.SSID = "Scan-Wifi";
        config.preSharedKey = "Scan-Wifi@233";
        config.hiddenSSID = false;//是否隐藏网络
        config.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN);//开放系统认证
        config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
        config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
        config.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
        config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
        config.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
        config.status = WifiConfiguration.Status.ENABLED;
        try {
            Method method = getWifiMgr().getClass().getMethod("setWifiApEnabled",
                    WifiConfiguration.class, Boolean.TYPE);
            Boolean result = (Boolean) method.invoke(getWifiMgr(), config, true);
            if (UText.isTrue(result)) {
                sid = "Scan-Wifi";
                pwd = "Scan-Wifi@233";
                callbak.onConnected("", sid, pwd);
            } else {
                sid = "";
                pwd = "";
                callbak.onConnected("wifi ap is failed to open", null, null);
            }
        } catch (Exception e) {
            sid = "";
            pwd = "";
            callbak.onConnected("wifi ap is failed to open", null, null);
        }
    }

3.热点是否打开 {@code true} 打开

public boolean isApOpen() {
        try {
            //反射获取 getWifiApState()方法
            Method method = getWifiMgr().getClass().getDeclaredMethod("isWifiApEnabled");
            method.setAccessible(true);
            return (boolean) method.invoke(getWifiMgr());
        } catch (Throwable ignored) {
            return false;
        }
    }

4.关闭热点

public void closeAp() {
        try {
            if (isSystemO()) {
                if (mReservation != null) {
                    mReservation.close();
                    mReservation = null;
                }
            } else {
                Method method = getWifiMgr().getClass().getMethod("setWifiApEnabled",
                        WifiConfiguration.class, boolean.class);
                method.invoke(getWifiMgr(), null, false);
            }
        } catch (Exception ignored) {
        }
    }