网上移植ethernet框架的文章很多,这里就不多说了,主要说下如何修改默认状态。如下就简单的说下,我也还没有研究的很清楚。
首先服务的建在:
frameworks/base/services/java/com/android/server/ConnectivityService.java
有如下代码:
EthernetStateTracker est = new EthernetStateTracker(context, mHandler); EthernetService ethService = new EthernetService(context, est); ServiceManager.addService(Context.ETHERNET_SERVICE, ethService); mNetTrackers[ConnectivityManager.TYPE_ETHERNET] = est; est.startMonitoring();
这个应该是最开始执行的时候运行的。也就是说服务建后执行了这个est.startMonitoring();
这个函数在:
frameworks/base/ethernet/java/android/net/ethernet/EthernetStateTracker.java
代码如下:
@Override public void startMonitoring() { if (localLOGV) Slog.v(TAG,"start to monitor the ethernet devices"); if (mServiceStarted) { mEM = (EthernetManager)mContext.getSystemService(Context.ETHERNET_SERVICE); int state = mEM.getState(); if (state != mEM.ETHERNET_STATE_DISABLED) { if (state == mEM.ETHERNET_STATE_UNKNOWN) { // maybe this is the first time we run, so set it to enabled mEm.setEnabled(true); } else { try { resetInterface(); } catch (UnknownHostException e) { Slog.e(TAG, "Wrong ethernet configuration"); } } } } }
调用的是EthernetManager里面的getState这个函数在:
frameworks/base/ethernet/java/android/net/ethernet/EthernetManager.java
代码如下:
/** * Get ethernet service state * @return the state of the ethernet service */ public int getState( ) { try { return mService.getState(); } catch (RemoteException e) { return 0; } }而这里又调用的Service里面的getState函数在:
frameworks/base/services/java/com/android/server/EthernetService.java
代码如下:
/** * Get ethernet service state * @return the state of the ethernet service */ public int getState( ) { return mEthState; }而MethState初始化的值为:
也就是说系统第一次运行到startMonitoring里会运行mEm.setEnabled(true);代码如下:
EthernetManager.java
/** * Enable or Disable a ethernet service * @param enable {@code true} to enable, {@code false} to disable * @hide */ public void setEnabled(boolean enable) { try { mService.setState(enable ? ETHERNET_STATE_ENABLED:ETHERNET_STATE_DISABLED); } catch (RemoteException e) { Slog.i(TAG,"Can not set new state"); } }而这里又会调用到service里面的setState代码如下:这里会传入enable给setState
EthernetService.java
private synchronized void persistEnabled(boolean enabled) { final ContentResolver cr = mContext.getContentResolver(); Settings.Secure.putInt(cr, Settings.Secure.ETHERNET_ON, enabled ? EthernetManager.ETHERNET_STATE_ENABLED : EthernetManager.ETHERNET_STATE_DISABLED); } /** * Enable or Disable a ethernet service * @param enable {@code true} to enable, {@code false} to disable */ public synchronized void setState(int state) { if (mEthState != state) { mEthState = state; if (state == EthernetManager.ETHERNET_STATE_DISABLED) { persistEnabled(false); mTracker.stopInterface(false); } else { persistEnabled(true); if (!isConfigured()) { // If user did not configure any interfaces yet, pick the first one // and enable it. setMode(EthernetDevInfo.ETHERNET_CONN_MODE_DHCP); } try { mTracker.resetInterface(); } catch (UnknownHostException e) { Slog.e(TAG, "Wrong ethernet configuration"); } } } }此时会传给内部内EthernetManager.ETHERNET_STATE_ENABLED状态。
EthernetStateTracker.java里面的startMonitoring修改为:
@Override public void startMonitoring() { if (localLOGV) Slog.v(TAG,"start to monitor the ethernet devices"); if (mServiceStarted) { mEM = (EthernetManager)mContext.getSystemService(Context.ETHERNET_SERVICE); int state = mEM.getState(); if (state != mEM.ETHERNET_STATE_DISABLED) { if (state == mEM.ETHERNET_STATE_UNKNOWN) { // maybe this is the first time we run, so set it to enabled mEM.setEnabled(false);//modi hclydao //mEm.setEnabled(true); } else { try { resetInterface(); } catch (UnknownHostException e) { Slog.e(TAG, "Wrong ethernet configuration"); } } } } }编译运行,成功。同时这不影响你设置的ethernet的状态。
至于后面的设置ethernet的流程这里就不分析了,因为我也是一知半解。前面如果有什么错误的地方希望大家指出。