Android 代码连接wifi需要哪些权限

整体流程

首先，我们需要获取 Manifest.permission.ACCESS_WIFI_STATE 权限，以便在 Android 应用程序中访问设备的 Wi-Fi 状态。然后，我们需要获取 Manifest.permission.CHANGE_WIFI_STATE 权限，以便在应用程序中开启或关闭设备的 Wi-Fi 功能。最后，我们需要获取 Manifest.permission.ACCESS_FINE_LOCATION 或 Manifest.permission.ACCESS_COARSE_LOCATION 权限，以便在 Android 6.0 及更高版本中扫描 Wi-Fi 网络时，系统可以获取设备的地理位置信息。

操作步骤

步骤 操作
1 检查是否有 Manifest.permission.ACCESS_WIFI_STATE 权限
2 检查是否有 Manifest.permission.CHANGE_WIFI_STATE 权限
3 检查是否有 Manifest.permission.ACCESS_FINE_LOCATION 或 Manifest.permission.ACCESS_COARSE_LOCATION 权限
4 连接指定的 Wi-Fi 网络

操作指南

步骤1：检查 Manifest.permission.ACCESS_WIFI_STATE 权限

// 检查是否有 ACCESS_WIFI_STATE 权限
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_WIFI_STATE)
        != PackageManager.PERMISSION_GRANTED) {
    // 未授予权限，向用户请求权限
    ActivityCompat.requestPermissions(this,
            new String[]{Manifest.permission.ACCESS_WIFI_STATE},
            MY_PERMISSIONS_REQUEST_ACCESS_WIFI_STATE);
}

步骤2：检查 Manifest.permission.CHANGE_WIFI_STATE 权限

// 检查是否有 CHANGE_WIFI_STATE 权限
if (ContextCompat.checkSelfPermission(this, Manifest.permission.CHANGE_WIFI_STATE)
        != PackageManager.PERMISSION_GRANTED) {
    // 未授予权限，向用户请求权限
    ActivityCompat.requestPermissions(this,
            new String[]{Manifest.permission.CHANGE_WIFI_STATE},
            MY_PERMISSIONS_REQUEST_CHANGE_WIFI_STATE);
}

步骤3：检查 Manifest.permission.ACCESS_FINE_LOCATION 或 Manifest.permission.ACCESS_COARSE_LOCATION 权限

// 检查是否有 ACCESS_FINE_LOCATION 或 ACCESS_COARSE_LOCATION 权限
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
        != PackageManager.PERMISSION_GRANTED
        || ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION)
        != PackageManager.PERMISSION_GRANTED) {
    // 未授予权限，向用户请求权限
    ActivityCompat.requestPermissions(this,
            new String[]{Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION},
            MY_PERMISSIONS_REQUEST_ACCESS_LOCATION);
}

步骤4：连接指定的 Wi-Fi 网络

WifiConfiguration wifiConfig = new WifiConfiguration();
wifiConfig.SSID = "\"SSID\"";
wifiConfig.preSharedKey = "\"password\"";
wifiConfig.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);

WifiManager wifiManager = (WifiManager) getApplicationContext().getSystemService(Context.WIFI_SERVICE);
int netId = wifiManager.addNetwork(wifiConfig);
wifiManager.enableNetwork(netId, true);
wifiManager.reconnect();

类图

classDiagram
    class AndroidApp {
        +onCreate()
    }
    class WifiManager {
        +addNetwork()
        +enableNetwork()
        +reconnect()
    }
    class WifiConfiguration {
        +SSID
        +preSharedKey
        +allowedKeyManagement
    }
    AndroidApp --> WifiManager
    AndroidApp --> WifiConfiguration

旅行图

journey
    title Connection to Wi-Fi Network
    section Request ACCESS_WIFI_STATE Permission
        AndroidApp->WifiManager: Check permission
        WifiManager-->AndroidApp: Permission granted
    section Request CHANGE_WIFI_STATE Permission
        AndroidApp->WifiManager: Check permission
        WifiManager-->AndroidApp: Permission granted
    section Request ACCESS_LOCATION Permission
        AndroidApp->WifiManager: Check permission
        WifiManager-->AndroidApp: Permission granted
    section Connect to Wi-Fi Network
        AndroidApp->WifiManager: Add network
        AndroidApp->WifiManager: Enable network
        AndroidApp->WifiManager: Reconnect

通过以上步骤，你已经学会了在 Android 应用程序中连接 Wi-Fi 网络所需的权限和代码实现方法。希望以上内容对你有所帮助，祝你在开发中顺利！