在Android Q中,可以使用WifiNetworkSpecifier类来通过编程方式连接不同的WiFi接入点进行上网。以下是一个示例代码,用于创建一个WiFi网络连接请求:
// 在AndroidManifest.xml中添加以下权限
//
// 在Activity或Fragment中的代码
import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
import android.net.ConnectivityManager;
import android.net.Network;
import android.net.NetworkCapabilities;
import android.net.NetworkRequest;
import android.net.wifi.WifiNetworkSpecifier;
import android.net.wifi.WifiManager;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import androidx.annotation.NonNull;
import androidx.annotation.RequiresApi;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
public class MainActivity extends AppCompatActivity {
private static final int PERMISSIONS_REQUEST_CODE = 1;
private static final String SSID = "YourWiFiSSID"; // 替换为你要连接的WiFi的SSID
private static final String PASSWORD = "YourWiFiPassword"; // 替换为你要连接的WiFi的密码
private ConnectivityManager.NetworkCallback networkCallback;
private Button connectButton;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
connectButton = findViewById(R.id.connect_button);
connectButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
connectToWifi();
}
});
// 检查并请求位置和WiFi权限
checkAndRequestPermissions();
}
private void connectToWifi() {
WifiNetworkSpecifier specifier = new WifiNetworkSpecifier.Builder()
.setSsid(SSID)
.setWpa2Passphrase(PASSWORD)
.build();
NetworkRequest request = new NetworkRequest.Builder()
.addTransportType(NetworkCapabilities.TRANSPORT_WIFI)
.setNetworkSpecifier(specifier)
.build();
networkCallback = new ConnectivityManager.NetworkCallback() {
@Override
public void onAvailable(@NonNull Network network) {
super.onAvailable(network);
// 网络连接成功
Toast.makeText(MainActivity.this, "Connected to WiFi", Toast.LENGTH_SHORT).show();
Log.d("WiFi", "Connected to WiFi");
// 可以在这里执行网络相关的操作
}
@Override
public void onUnavailable() {
super.onUnavailable();
// 无法连接到网络
Toast.makeText(MainActivity.this, "Failed to connect to WiFi", Toast.LENGTH_SHORT).show();
Log.d("WiFi", "Failed to connect to WiFi");
}
};
ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivityManager != null) {
connectivityManager.requestNetwork(request, networkCallback);
}
}
private void checkAndRequestPermissions() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
PERMISSIONS_REQUEST_CODE);
}
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (requestCode == PERMISSIONS_REQUEST_CODE) {
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
Toast.makeText(this, "Location permission granted", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, "Location permission denied", Toast.LENGTH_SHORT).show();
}
}
}
@Override
protected void onDestroy() {
super.onDestroy();
// 断开网络连接
ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivityManager != null && networkCallback != null) {
connectivityManager.unregisterNetworkCallback(networkCallback);
}
}
}
以上代码中,我们首先在AndroidManifest.xml中添加了位置权限的声明,并在运行时动态请求该权限。在connectToWifi()方法中,我们创建了一个WifiNetworkSpecifier对象,并指定了要连接的WiFi的SSID和密码。然后,我们使用NetworkRequest来设置连接要求,并使用ConnectivityManager.requestNetwork()方法发起网络连接请求。最后,我们实现了一个NetworkCallback来处理网络连接的结果。
请注意,为了在Android Q中进行WiFi连接,你需要在AndroidManifest.xml文件中