手机无法解析域名通常指的是手机在尝试访问某个网站时,无法将网站的域名(如www.example.com)转换为对应的IP地址。域名解析是通过DNS(Domain Name System,域名系统)来完成的,DNS服务器负责将域名转换为IP地址。
以下是一个简单的Android应用示例,演示如何手动设置DNS服务器:
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.Network;
import android.net.NetworkCapabilities;
import android.net.NetworkRequest;
import android.os.Bundle;
import android.util.Log;
import androidx.appcompat.app.AppCompatActivity;
import java.net.InetAddress;
import java.net.UnknownHostException;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 设置DNS服务器
setDnsServer("8.8.8.8");
// 测试DNS解析
testDnsResolution("www.example.com");
}
private void setDnsServer(String dnsServer) {
try {
InetAddress inetAddress = InetAddress.getByName(dnsServer);
ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkRequest.Builder builder = new NetworkRequest.Builder();
connectivityManager.registerNetworkCallback(builder.build(), new ConnectivityManager.NetworkCallback() {
@Override
public void onAvailable(Network network) {
super.onAvailable(network);
Log.d("DNS", "Network available");
}
});
} catch (UnknownHostException e) {
Log.e("DNS", "Invalid DNS server address", e);
}
}
private void testDnsResolution(String domain) {
new Thread(() -> {
try {
InetAddress[] addresses = InetAddress.getAllByName(domain);
for (InetAddress address : addresses) {
Log.d("DNS", "Resolved IP: " + address.getHostAddress());
}
} catch (UnknownHostException e) {
Log.e("DNS", "DNS resolution failed", e);
}
}).start();
}
}
希望这些信息能帮助你解决手机无法解析域名的问题。
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