android wifi源码分析,Wifi源码分析 (一) wifi初始化

时序图:

wifi初始化.png

1. 系统启动wifiServer

系统服务都是开机启动,不去说init什么等c的孵化器流程,直接进入run说起

@frameworks/base/services/java/com/android/server/SystemServer.java

private static final String WIFI_SERVICE_CLASS =

"com.android.server.wifi.WifiService";

public static void main(String[] args) {

new SystemServer().run();

}

private void run() {

...

startOtherServices();

...

}

private void startOtherServices() {

...

if (!mOnlyCore) {

if (context.getPackageManager().hasSystemFeature(

PackageManager.FEATURE_WIFI)) {

// Wifi Service must be started first for wifi-related services.

traceBeginAndSlog("StartWifi");

mSystemServiceManager.startService(WIFI_SERVICE_CLASS);

traceEnd();

traceBeginAndSlog("StartWifiScanning");

mSystemServiceManager.startService(

"com.android.server.wifi.scanner.WifiScanningService");

traceEnd();

}

...

}

@frameworks/base/services/core/java/com/android/server/SystemServiceManager.java

public SystemService startService(String className) {

final Class serviceClass;

try {

serviceClass = (Class)Class.forName(className);

} catch (ClassNotFoundException ex) {

Slog.i(TAG, "Starting " + className);

throw new RuntimeException("Failed to create service " + className

+ ": service class not found, usually indicates that the caller should "

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