目前Android的WiFi自动连接的优先级规则如下:
1、priority值的范围设定为[0,1000000),如果超出此范围则会reset;
2、最近连接过的AP拥有最高priority,在自动连接中会首先尝试连接它;4、如果是预置的AP,可能会人为设定其最高的priority;
看一下源码,代码路径:frameworks/base/wifi/java/android/net/wifi/
boolean selectNetwork(int netId) {
if (VDBG) localLog("selectNetwork", netId);
if (netId == INVALID_NETWORK_ID) return false;
// Reset the priority of each network at start or if it goes too high.
if (mLastPriority == -1 || mLastPriority > 1000000) {
Xlog.d(TAG, "Need to reset the priority, mLastPriority:" + mLastPriority);
for(WifiConfiguration config : mConfiguredNetworks.values()) {
if (config.networkId != INVALID_NETWORK_ID) {
config.priority = 0;
addOrUpdateNetworkNative(config);
}
}
mLastPriority = 0;
}
// Set to the highest priority and save the configuration.
WifiConfiguration config = new WifiConfiguration();
config.networkId = netId;
config.priority = ++mLastPriority;
addOrUpdateNetworkNative(config);
mWifiNative.saveConfig();
/* Enable the given network while disabling all other networks */
enableNetworkWithoutBroadcast(netId, true);
/* Avoid saving the config & sending a broadcast to prevent settings
* from displaying a disabled list of networks */
return true;
}/data/misc/wifi/sockets/wpa_supplicant.conf
每一个network包裹起来的就是一个连接过的WiFi热点,其中ssid是名字,psk就是密码了,也可以看到其他信息,包括加密类型key_mgmt和优先级priority,是否自动连接autojoin等,如下图:
转载请注明出处:周木水的CSDN博客 http://blog.csdn.net/zhoumushui
我的GitHub:周木水的GitHub https://github.com/zhoumushui
Android自动连接WiFi优先级规则,以及查看已连接WiFi的密码
原文地址:http://blog.csdn.net/zhoumushui/article/details/41276657