Android Studio中IP查找的问题无法解析主机地址Java

如何解决Android Studio中IP查找的问题无法解析主机地址Java

我在Java中的ip查找程序遇到问题，我导入了Inet Adress并实现了异步任务，并在清单上使用了权限，但仍然显示相同的问题。错误：无法解析主机“ [Ljava.lang.String; @ f1679a5”：没有与主机名关联的地址，我一直在Internet上搜索，其中一些人说这是模拟器问题，但是我可以在我的Internet上访问我已经完成了他们推荐的所有设备，但仍然没有解决方案。

这是代码部分：

    EditText hostnumber;
TextView output;
Button submit;
ImageView back;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_lookup);
    back = findViewById(R.id.backlearn);

hostnumber = findViewById(R.id.hostnumber);
output = findViewById(R.id.outputDecimal);
submit = findViewById(R.id.submit);

back.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        Intent intent = new Intent(Lookup.this,MainActivity.class);
        startActivity(intent);
    }
});
submit.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        @SuppressLint("StaticFieldLeak") AsyncTask<String,Void,connection.Result<InetAddress>> task = new AsyncTask<String,connection.Result<InetAddress>>() {
            // NOTE: this method runs in a background thread,you cannot access the View from here
            @Override
            protected connection.Result<InetAddress> doInBackground(String... hostnumber) {
                connection.Result<InetAddress> result;
                try {
                    result = new connection.Result.Success(InetAddress.getByName(String.valueOf(hostnumber)));
                } catch (UnknownHostException e) {
                    e.printStackTrace();
                    result = new connection.Result.Failure(e);
                }catch (Exception e) {
                    result = new connection.Result.Failure(e);
                }

                return result;
            }


            @Override
            protected void onPostExecute(connection.Result<InetAddress> result) {
                if (result instanceof connection.Result.Success) {
                    output.setText((CharSequence) ((connection.Result.Success<InetAddress>) result).data);
                } else if (result instanceof connection.Result.Failure) {
                   Throwable error = ((connection.Result.Failure<InetAddress>) result).error;
                    Toast.makeText(Lookup.this,"Please Check The Address!: " +error,Toast.LENGTH_SHORT).show();

                }
            }
        };

        task.execute(hostnumber.toString());
    };
})
;}

}
class connection extends Activity {
    static class Result<T> {
        static class Success<T> extends Result<T> {
            public T data;
            public Success(T data) {
                this.data = data;
            }
        }
        static class Failure<T> extends Result<T> {
            public Throwable error;
            public Failure(Throwable error) {
                this.error = error;
            }
        }
    }

这是错误部分：

W/System.err: java.net.UnknownHostException: Unable to resolve host "[androidx.appcompat.widget.AppCompatEditText{f465e26 VFED..CL. .F...... 158,160-923,275 #7f0800b1 app:id/hostnumber}]": No address associated with hostname at java.net.Inet6AddressImpl.lookupHostByName(Inet6AddressImpl.java:156) at java.net.Inet6AddressImpl.lookupAllHostAddr(Inet6AddressImpl.java:103) at java.net.InetAddress.getByName(InetAddress.java:1106) at com.modex.smartcalculator.Lookup$2$1.doInBackground(Lookup.java:50) at com.modex.smartcalculator.Lookup$2$1.doInBackground(Lookup.java:44) at android.os.AsyncTask$3.call(AsyncTask.java:378) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:289) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641) at java.lang.Thread.run(Thread.java:919) Caused by: android.system.GaiException: android_getaddrinfo failed: EAI_NODATA (No address associated with hostname) at libcore.io.Linux.android_getaddrinfo(Native Method) at libcore.io.ForwardingOs.android_getaddrinfo(ForwardingOs.java:74) at libcore.io.BlockGuardOs.android_getaddrinfo(BlockGuardOs.java:200) W/System.err:     at libcore.io.ForwardingOs.android_getaddrinfo(ForwardingOs.java:74) at java.net.Inet6AddressImpl.lookupHostByName(Inet6AddressImpl.java:135) ... 10 more

我已经解决这个问题了两个星期，但仍然没有解决方案，我没有重新启动设备，与同事交谈过，听过所有互联网论坛和文档，但仍然没有任何线索，我也尝试过使用真正的设备，与5个虚拟设备相同的问题。请帮忙！

解决方法

您似乎使用变量名“ hostnumber”来引用一些不同的内容。这会造成混乱。您可以通过选择反映变量使用方式及其含义的名称来避免这种情况。

在顶层，“主机号”是一个EditText GUI组件。您想要获取其中包含的文本，而不是将组件本身转换为字符串。使用：

task.execute(hostnumber.getText().toString());

在AsyncTask.doInBackground方法中，hostnumber是一个字符串数组。您将要使用数组中的第一个元素，因此编写hostnumber[0]而不是将数组本身转换为字符串。使用：

result = new connection.Result.Success(InetAddress.getByName(hostnumber[0]));