1、wifi原生setting的入口在WifiTetherSettings.java

packages/apps/Settings/src/com/android/settings/wifi/tether/WifiTetherSettings.java

• WifiTetherSettings​​​​​​​层

开启热点和关闭热点的最后是使用ConnectivityManager的 startTethering 和 stopTethering

packages/apps/Settings/src/com/android/settings/wifi/tether/WifiTetherSwitchBarController.java

    void stopTether() {mSwitchBar.setEnabled(false);mConnectivityManager.stopTethering(TETHERING_WIFI);}void startTether() {mSwitchBar.setEnabled(false);mConnectivityManager.startTethering(TETHERING_WIFI, true /* showProvisioningUi */,mOnStartTetheringCallback, new Handler(Looper.getMainLooper()));}

• ConnectivityManager层

frameworks/base/core/java/android/net/ConnectivityManager.java

    public void startTethering(int type, boolean showProvisioningUi,final OnStartTetheringCallback callback, Handler handler) {mTetheringManager.startTethering(request, executor, tetheringCallback);}public void stopTethering(int type) {mTetheringManager.stopTethering(type);}

• TetheringManager层​​​​​​​

frameworks/base/packages/Tethering/common/TetheringLib/src/android/net/TetheringManager.java

调用到Tethering

    public void startTethering(@NonNull final TetheringRequest request,@NonNull final Executor executor, @NonNull final StartTetheringCallback callback) {getConnector(c -> c.startTethering(request.getParcel(), callerPkg, listener));}public void stopTethering(@TetheringType final int type) {getConnector(c -> c.stopTethering(type, callerPkg, new IIntResultListener.Stub() {@Overridepublic void onResult(int resultCode) {}}));}

 

• Tethering层

frameworks/base/packages/Tethering/src/com/android/networkstack/tethering/Tethering.java

最后startTethering调用到最后是WifiManager.startTetheredHotspot,

stopTethering 调用到最后是WifiManager.stopSoftAp

    void startTethering(final TetheringRequestParcel request, final IIntResultListener listener) {mHandler.post(() -> {enableTetheringInternal(request.tetheringType, true /* enabled */, listener);});}private void enableTetheringInternal(int type, boolean enable,final IIntResultListener listener) {int result = TETHER_ERROR_NO_ERROR;switch (type) {case TETHERING_WIFI:result = setWifiTethering(enable);break;case TETHERING_USB:result = setUsbTethering(enable);break;case TETHERING_BLUETOOTH:setBluetoothTethering(enable, listener);break;default:Log.w(TAG, "Invalid tether type.");result = TETHER_ERROR_UNKNOWN_TYPE;}}private int setWifiTethering(final boolean enable) {final WifiManager mgr = getWifiManager();if ((enable && mgr.startTetheredHotspot(null /* use existing softap config */))|| (!enable && mgr.stopSoftAp())) {mWifiTetherRequested = enable;return TETHER_ERROR_NO_ERROR;}}

2、改热点Setting的时候可以直接只编译Settings.apk，并且替换，可以查看Android.bp文件

./system_ext/priv-app/Settings/Settings.apk