android 4.0 "搬动网络" 选项 不存在

关键词：android 4.0 移动网络 Mobile networks
平台信息:
内核：linux2.6/linux3.0
系统：android/android4.0
平台：S5PV310(samsung exynos4210)

前几天调试3G模块，最后发现我拿到的BSP，在“设置”—中没有关于3G的选项，状态栏也没有显示3G状态的图标，如下图所示，这个可好，把3G的驱动加入，进程也起来了，就是不知道怎么连接。最可恶的就是在网上看到一哥们也遇到相同的问题，他发贴子求帮助，最后问题解决了，结贴时写一个“问题解决，结贴”，问他怎么搞的，他也没回，有点不“厚道”呀，嘿嘿！还是自己找吧……

1、“Mobile networks”字符串定义

我们想要的数据没有显示，从不显示的字符找起,顺藤摸瓜吧，这些对我们这些做驱动的有点难度。“Mobile networks”不显示，那我们就从最开始跟下代码吧。

4.0.3_r1/packages/apps/Settings/res/values/String.xml  <!-- Wireless controls, item title to go into the network settings -->   <string name="network_settings_title">Mobile networks</string>

2、network_settings_title引用

4.0.3_r1/packages/apps/Settings/src/com/android/settings/WirelessSettings.java中找到："mobile_network_settings"  private static final String KEY_MOBILE_NETWORK_SETTINGS = "mobile_network_settings"; 

把 network_settings_title赋值给 KEY_MOBILE_NETWORK_SETTINGS，再跟进一下 KEY_MOBILE_NETWORK_SETTINGS这个变量吧。

在相同的文件中我们找到：

 // Remove Mobile Network Settings if it's a wifi-only device.   if (Utils.isWifiOnly(getActivity())) {   getPreferenceScreen().removePreference(findPreference(KEY_MOBILE_NETWORK_SETTINGS));   } 

getSystemService(Context.CONNECTIVITY_SERVICE);获得网络连接服务，然后判断是否支持TYPE_MOBILE，现在判断应该是不支持，也就是if判断中：Utils.isWifiOnly(getActivity())=1

所以把“移动网络”的选项移除，现在我们就重点去分析Utils.isWifiOnly(getActivity())，找到不显示的原因，也就是if()中的判断条件，跟进这段代码。

3、我们去看下ifWifiOnly()是何方神圣？

4.0.3_r1/packages/apps/Settings/src/com/android/settings/Utils.java中找到

import android.net.ConnectivityManager; public static boolean isWifiOnly(Context context) {ConnectivityManager cm = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);return (cm.isNetworkSupported(ConnectivityManager.TYPE_MOBILE) == false);}

Utils.isWifiOnly(getActivity())=1也就是

cm.isNetworkSupported(ConnectivityManager.TYPE_MOBILE) = false,可是我们现在要的值是true,为什么会出现false呢，我们继续往下看cm.isNetworkSupported。

4、 再分析isNetworkSupported

android.net.ConnectivityManager;找到

4.0.3_r1/frameworks/base/core/java/android/net/ ConnectivityManager.java

isNetworkSupported的实现如下：

public boolean isNetworkSupported(int networkType) {try {return mService.isNetworkSupported(networkType);} catch (RemoteException e) {}return false;}}

继续跟进 mService.isNetworkSupported这个函数的实现

5、 mService.isNetworkSupported的实现

4.0.3_r1/frameworks/base/services/java/com/android/server/ ConnectivityManager.java

  @Override   public boolean isNetworkSupported(int networkType) {   enforceAccessPermission(); loge("xu_bin"+"test typevalid = " + isNetworkTypeValid(networkType) + " trackers = " + (mNetTrackers[networkType] != null));   return (isNetworkTypeValid(networkType) && (mNetTrackers[networkType] != null));   }

有两个参数： isNetworkTypeValid(networkType)、 (mNetTrackers[networkType] != null))

我们要的值是ture，可返回是false，看下这两个值是什么，把这连个值打印出来：

loge("xu_bin"+"test typevalid = " + isNetworkTypeValid(networkType) + " trackers = " + (mNetTrackers[networkType] != null));

打印结果为：

打印结果为：

E/ConnectivityService( 1426): xu_bin test typevalid = true trackers = false

也就是说：(mNetTrackers[networkType] != null)这个地方出问题；

即mNetTrackers[networkType] ==null

6、我们在看下：mNetTrackers[networkType]的由来吧

其实下面这段代码我有点蒙，连猜带蒙的，

4.0.3_r1/frameworks/base/services/java/com/android/server/ ConnectivityManager.java

public ConnectivityService(Context context, INetworkManagementService netd,  INetworkStatsService statsService, INetworkPolicyManager policyManager){  if (DBG) log("ConnectivityService starting up");           …………  // Load device network attributes from resources  String[] raStrings = context.getResources().getStringArray(  com.android.internal.R.array.radioAttributes);  for (String raString : raStrings) {          loge("xu_bin test raStrings" + raStrings); // 1          loge("xu_bin test raString" + raString);  RadioAttributes r = new RadioAttributes(raString);  if (r.mType > ConnectivityManager.MAX_RADIO_TYPE) {  loge("Error in radioAttributes - ignoring attempt to define type " + r.mType);  continue;  }  if (mRadioAttributes[r.mType] != null) {  loge("Error in radioAttributes - ignoring attempt to redefine type " +  r.mType);  continue;  }  mRadioAttributes[r.mType] = r;  }   String[] naStrings = context.getResources().getStringArray(  com.android.internal.R.array.networkAttributes);   for (String naString : naStrings) {          loge("xu_bin test naStrings" + naStrings);//2          loge("xu_bin test naString" + naString);  try {  NetworkConfig n = new NetworkConfig(naString);  if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) {  loge("Error in networkAttributes - ignoring attempt to define type " +  n.type);  continue;  }  if (mNetConfigs[n.type] != null) {  loge("Error in networkAttributes - ignoring attempt to redefine type " +  n.type);  continue;  }  …………  /*  * Create the network state trackers for Wi-Fi and mobile  * data. Maybe this could be done with a factory class,  * but it's not clear that it's worth it, given that  * the number of different network types is not going  * to change very often.  */  for (int netType : mPriorityList) {loge("xu_bin:" + netType + " " + mNetConfigs[netType].radio + " " + ConnectivityManager.TYPE_MOBILE);loge("xu_bin test mNetConfigs[netType].radio =" + (mNetConfigs[netType].radio));//3  switch (mNetConfigs[netType].radio) {                        …………  case ConnectivityManager.TYPE_MOBILE:  mNetTrackers[netType] = new MobileDataStateTracker(netType,  mNetConfigs[netType].name);  mNetTrackers[netType].startMonitoring(context, mHandler);  break;  case ConnectivityManager.TYPE_DUMMY:  mNetTrackers[netType] = new DummyDataStateTracker(netType,  mNetConfigs[netType].name);  mNetTrackers[netType].startMonitoring(context, mHandler);  break;                      …………  case ConnectivityManager.TYPE_ETHERNET:  mNetTrackers[netType] = EthernetDataTracker.getInstance();  mNetTrackers[netType].startMonitoring(context, mHandler);  break;  default:  loge("Trying to create a DataStateTracker for an unknown radio type " +  mNetConfigs[netType].radio);  continue;  }  mCurrentLinkProperties[netType] = null;  if (mNetTrackers[netType] != null && mNetConfigs[netType].isDefault()) {  mNetTrackers[netType].reconnect();  }  }   …………  }

加入打印信息：

（1）、

loge("xu_bin test raStrings" + raStrings);

loge("xu_bin test raString" + raString);

（2）、

loge("xu_bin test naStrings" + naStrings);

loge("xu_bin test naString" + naString);

（3）、

loge("xu_bin:" + netType + " " + mNetConfigs[netType].radio + " " + ConnectivityManager.TYPE_MOBILE);

loge("xu_bin test mNetConfigs[netType].radio =" + (mNetConfigs[netType].radio));

打印出来的值如下：E/ConnectivityService( 1426): xu_bin test raString s[Ljava.lang.String;@411cf008 E/ConnectivityService( 1426): xu_bin test raString 9,1 E/ConnectivityService( 1426): xu_bin test naString s[Ljava.lang.String;@410e30c8 E/ConnectivityService( 1426): xu_bin test naString ethernet,9,9,1,-1,true E/ConnectivityService( 1426): xu_bin:9 9 0 E/ConnectivityService( 1426): xu_bin test mNetConfigs[netType].radio =9 D/NetworkManagementService( 1426): Registering observer D/NetworkManagementService( 1426): Registering observer D/NetworkManagementService( 1426): Registering observer I/WifiService( 1426): WifiService starting up with Wi-Fi disabled E/ConnectivityService( 1426): xu_bintest typevalid = true trackers = falsecom.android.internal.R.array.networkAttributes的值在：

我们在：4.0.3_r1/frameworks/base/core/res/res/values/config.xml

<string-array translatable="false" name="networkAttributes">   <item>"wifi,1,1,1,-1,true"</item>   <item>"mobile,0,0,0,-1,true"</item>   <item>"mobile_mms,2,0,2,60000,true"</item>   <item>"mobile_supl,3,0,2,60000,true"</item>   <item>"mobile_hipri,5,0,3,60000,true"</item>   <item>"mobile_fota,10,0,2,60000,true"</item>   <item>"mobile_ims,11,0,2,60000,true"</item>   <item>"mobile_cbs,12,0,2,60000,true"</item>   <item>"wifi_p2p,13,1,0,-1,true"</item>   </string-array>

这里面并没有：ethernet,9,9,1,-1,true ,所以我们全局搜索一下：

grep -r -w ethernet ./*得到下面有用信息：

./android-samsung-dev.patch:- <item>"ethernet,9,9,2,-1,true"</item> ./android-samsung-dev.patch:+           // Following code will forcefully allow ethernet network as usable required for v310/c210. ./packages/providers/DownloadProvider/src/com/android/providers/downloads/DownloadThread.java:          // Following code will forcefully allow ethernet network as usable required for v310/c210. ./device/samsung/smdkv310/overlay/frameworks/base/core/res/res/values/config.xml: <item>"ethernet,9,9,1,-1,true"</item> 

对比代码发现：

./packages/providers/DownloadProvider/src/com/android/providers/downloads/DownloadThread.java中删除

   Following code will forcefully allow ethernet network as usable required for v310/c210.   if (networkUsable != DownloadInfo.NETWORK_OK) {   Log.i(Constants.TAG, " Forcing ethernet connection usable for download to work!!!");             networkUsable = DownloadInfo.NETWORK_OK;           }

4.0.3_r1/device/samsung/smdkv310/overlay/frameworks/base/core/res/res/values/config.xml中删除：

  <!-- This string array should be overridden by the device to present a list of network   attributes. This is used by the connectivity manager to decide which networks can coexist   based on the hardware -->   <!-- An Array of "[Connection name],[ConnectivityManager connection type],   [associated radio-type],[priority],[restoral-timer(ms)],[dependencyMet] -->   <!-- the 5th element "resore-time" indicates the number of milliseconds to delay   before automatically restore the default connection. Set -1 if the connection   does not require auto-restore. -->   <!-- the 6th element indicates boot-time dependency-met value. -->   <string-array translatable="false" name="networkAttributes">   <item>"ethernet,9,9,1,-1,true"</item>   </string-array>     <!-- This string array should be overridden by the device to present a list of radio   attributes. This is used by the connectivity manager to decide which networks can coexist   based on the hardware -->   <!-- An Array of "[ConnectivityManager connectionType],   [# simultaneous connection types]" -->   <string-array translatable="false" name="radioAttributes">   <item>"9,1"</item>   </string-array>

把上面两部分删除就可以了。其实真正的值是在4.0.3_r1/frameworks/base/core/res/res/values/config.xml中，通过上面函数解析。

正常情况下打印值为：如：wifi mobile mobile_mms mobile_supl等都是在config.xml中配置的

D/ConnectivityService( 1397): ConnectivityService starting upE/ConnectivityService( 1397): xu_bin test restring s[Ljava.lang.String;@41240e38E/ConnectivityService( 1397): xu_bin test restring 1,1E/ConnectivityService( 1397): xu_bin test restring s[Ljava.lang.String;@41240e38E/ConnectivityService( 1397): xu_bin test restring 0,1E/ConnectivityService( 1397): xu_bin test naString s[Ljava.lang.String;@41241880E/ConnectivityService( 1397): xu_bin test naString wifi,1,1,1,-1,trueE/ConnectivityService( 1397): xu_bin test naString s[Ljava.lang.String;@41241880E/ConnectivityService( 1397): xu_bin test naString mobile,0,0,0,-1,trueE/ConnectivityService( 1397): xu_bin test naString s[Ljava.lang.String;@41241880E/ConnectivityService( 1397): xu_bin test naString mobile_mms,2,0,2,60000,trueE/ConnectivityService( 1397): xu_bin test naString s[Ljava.lang.String;@41241880E/ConnectivityService( 1397): xu_bin test naString mobile_supl,3,0,2,60000,trueE/ConnectivityService( 1397): xu_bin test naString s[Ljava.lang.String;@41241880E/ConnectivityService( 1397): xu_bin test naString mobile_hipri,5,0,3,60000,trueE/ConnectivityService( 1397): xu_bin test naString s[Ljava.lang.String;@41241880E/ConnectivityService( 1397): xu_bin test naString mobile_fota,10,0,2,60000,trueE/ConnectivityService( 1397): xu_bin test naString s[Ljava.lang.String;@41241880E/ConnectivityService( 1397): xu_bin test naString mobile_ims,11,0,2,60000,trueE/ConnectivityService( 1397): xu_bin test naString s[Ljava.lang.String;@41241880E/ConnectivityService( 1397): xu_bin test naString mobile_cbs,12,0,2,60000,trueE/ConnectivityService( 1397): xu_bin test naString s[Ljava.lang.String;@41241880E/ConnectivityService( 1397): xu_bin test naString wifi_p2p,13,1,0,-1,true

下面就可以看到“移动网络”了：

1楼thl789昨天 09:56

思路清晰！nn不过，问题虽然看似解决了，但从后面看貌似不是问题的关键：nnConnectivityService（你的5，6之后的路径表述有误，应为ConnectivityService.java，如果4.0与2.3没有太大区别的情况下）中用mNetTrackers[]记录跟踪所有的ConnectivityManager.TYPE_xxx中的连接。n当前用别的连接可能会影响到其他的连接，但怎么会因为Ethernet，而使得Mobile连mNetTrackers[]对象都不存在?nnEthernet与Mobile连接共存问题才是问题的关键n我看的2.3里没有Ethernet，应是为平板加入的，你确信今后不会用到，也可以这么直接干掉

Re: xubin341719昨天 10:22

回复thl789n嘿嘿，多谢指导！！nEthernet我们这版上没用，后面估计会用！n我是做驱动方面的，上层的代码对我来说有点难度，有错的地方欢迎指正，努力学习中！！