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最新推荐文章于 2024-04-16 15:09:06 发布

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最新推荐文章于 2024-04-16 15:09:06 发布

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CC 4.0 BY-SA版权

本文链接：https://blog.youkuaiyun.com/yxfabcdefg/article/details/72903760

本文解析了Android系统中WiFi开关的实现细节，包括开关状态改变时的处理流程、防止空中模式下开启WiFi的功能以及关闭热点等功能。

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//---android_code/packages/apps/Settings/src/com/android/settings/wifi/WifiEnabler.java

    @Override
    public void onSwitchChanged(Switch switchView, boolean isChecked) {
        //Do nothing if called as a result of a state machine event
        if (mStateMachineEvent) {
            return;
        }
        // Show toast message if Wi-Fi is not allowed in airplane mode
        if (isChecked && !WirelessUtils.isRadioAllowed(mContext, Settings.Global.RADIO_WIFI)) {
            Toast.makeText(mContext, R.string.wifi_in_airplane_mode, Toast.LENGTH_SHORT).show();
            // Reset switch to off. No infinite check/listenenr loop.
            mSwitchBar.setChecked(false);
            return;
        }

        // Disable tethering if enabling Wifi
        if (mayDisableTethering(isChecked)) {
            mWifiManager.setWifiApEnabled(null, false);
        }
        MetricsLogger.action(mContext,
                isChecked ? MetricsEvent.ACTION_WIFI_ON : MetricsEvent.ACTION_WIFI_OFF);
        if (!mWifiManager.setWifiEnabled(isChecked)) {
            // Error
            mSwitchBar.setEnabled(true);
            Toast.makeText(mContext, R.string.wifi_error, Toast.LENGTH_SHORT).show();
        }
    }

vim android_code/packages/apps/Settings/src/com/android/settings/ WirelessSettings.java
vim android_code/linux/kernel/arch/x86platform/intel-mid/device_libs/platform_wifi.c