java - android ping InetAddress 和 editText

Question

我想在EditText框中输入IP， 然后通过按钮 ping(可达或不可达)在 textView 中提供结果

public class MainActivity extends Activity {
Button button;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    button = (Button) findViewById(R.id.button1);
    button.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            // TODO Auto-generated method stub
            try {
            EditText editText = (EditText) findViewById(R.id.editText1);
            TextView textView = (TextView) findViewById(R.id.textView);
             String input= editText.getText().toString();

               InetAddress ip;
                ip = InetAddress.getByName(input);
                boolean reach= ip.isReachable(5000);
                   textView.setText("real ?"+reach);

            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }   
        }
    });
}   
}

每当我在真实手机中按下 ping 按钮时，它就会从应用程序中出来，为什么？

Answer 1

我猜你的net方法错了，试试这个代码，如果仍然这样 不可行请告诉我。

public class MainActivity extends Activity {
Button button;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    button = (Button) findViewById(R.id.button1);
    button.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            // TODO Auto-generated method stub
            try {
            EditText editText = (EditText) findViewById(R.id.editText1);
            final TextView textView = (TextView) findViewById(R.id.textView);
             final String input= editText.getText().toString();
             new Thread(new Runnable(){
                 InetAddress ip;
                ip = InetAddress.getByName(input);
                final boolean reach= ip.isReachable(5000);
                runOnUiThread(new Runnable() {
                    textView.setText("real ?"+reach);
                });
             }).start(); 



                   textView.setText("real ?"+reach);

            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }   
        }
    });
}   
}