android系统开机向导无法启动数据进行上网

由于android系统开机向导界面比较特殊，会通过Settings.Global.DEVICE_PROVISIONED 属性来控制，刷完机第一次启启动此值会默认为0 ，开机向导结束后会设置为1，系统很多地方会根据此值来控制

opt/telephony/src/java/com/android/internal/telephony/dataconnection/DcTracker.java

opt/telephony/src/java/com/android/internal/telephony/dataconnection/DataEnabledSettings.java

DataEnabledSettings.java 中：

public boolean isProvisioning() {

         return Settings.Global.getInt(mResolver, Settings.Global.DEVICE_PROVISIONED, 0) == 0;

     }

    /**

      * In provisioning, we might want to have enable mobile data during provisioning. It depends

      * on value of Settings.Global.DEVICE_PROVISIONING_MOBILE_DATA_ENABLED which is set by

      * setupwizard. It only matters if it's in provisioning stage.

     * @return whether we are enabling userData during provisioning stage.

      */

    public boolean isProvisioningDataEnabled() {

         final String prov_property = SystemProperties.get("ro.com.android.prov_mobiledata",

                 "false");

        boolean retVal = "true".equalsIgnoreCase(prov_property);

         final int prov_mobile_data = Settings.Global.getInt(mResolver,

                Settings.Global.DEVICE_PROVISIONING_MOBILE_DATA_ENABLED,                                                                                                                 

                retVal ? 1 : 0);

         retVal = prov_mobile_data != 0;

         log("getDataEnabled during provisioning retVal=" + retVal + " - (" + prov_property

                 + ", " + prov_mobile_data + ")");

         return retVal;

     }

所以问题就比较简单了系统给开了个后门：直接在开机向导里第一个页面初始化Settings.Global.DEVICE_PROVISIONING_MOBILE_DATA_ENABLED 值为 1

如：

/**

    * 开机向导能界面能开启数据

    */

    private void startData() {

        Settings.Global.putInt(getContentResolver(), "device_provisioning_mobile_data", 1);

    }

快速验证通过adb 命令：adb shell settings put global device_provisioning_mobile_data 1  直接设置到数据库中！！！