Question

我无法理解为什么EditText会给我一个保存在我使用的变量中的奇怪值。

例如，当我将这些EditText的内容保存到某些变量时，会保存此值：

variable: android.widget.EditText{41940958 VFED..CL .F...... 24,158-456,225 #7f080002 app:id/etHost}

这是我的代码：

public class MainActivity extends Activity {

Button btnConnetti;
EditText etUsername;
EditText etPassword;
EditText etHost;

String host=null;
String username=null;
String password=null;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    btnConnetti = (Button) findViewById(R.id.btnConnetti);
    etUsername = (EditText) findViewById(R.id.etUsername);
    etPassword = (EditText) findViewById(R.id.etPassword);
    etHost = (EditText) findViewById(R.id.etHost);

    btnConnetti.setOnClickListener( new View.OnClickListener() {

        @Override
        public void onClick(View v) {

            host = etHost.toString().trim();
            username = etUsername.toString().trim();
            password = etPassword.toString().trim();

            Log.d("deb","host: "+etHost.toString());

            if(host.isEmpty() || username.isEmpty() || password.isEmpty())
            {
                new AlertDialog.Builder(getApplicationContext())
                .setTitle("Login fallito!")
                .setMessage("Compilare tutti i campi richiesti.")
                .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {

                    @Override
                    public void onClick(DialogInterface arg0, int arg1) {
                        return;
                    }
                }).create().show();
            }
            else
            {
                myClickHandler(getCurrentFocus());

            }
        }
    });
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

public void myClickHandler(View view) {
    ConnectivityManager connMgr = (ConnectivityManager) 
            getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();
    if (networkInfo != null && networkInfo.isConnected()) {
        new InviaDati(host,username,password).execute();
    } else {
        // display error
    }
}


}

class InviaDati extends AsyncTask<String, Integer, Void>
{
InputStream is = null;
String host,username,password;

public InviaDati(String host,String username,String password)
{
    this.host=host;
    this.username=username;
    this.password=password;
}

@Override
protected void onPreExecute()
{

}

@Override
protected Void doInBackground(String... params) {
    // TODO Auto-generated method stub

    Log.d("deb",host+"/callback.php?username="+username+"&password="+password);

    try {

        URL url = new URL(host+"/callback.php?username="+username+"&password="+password);
        Log.d("deb",host+"/callback.php?username="+username+"&password="+password);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setReadTimeout(10000 /* milliseconds */);
        conn.setConnectTimeout(15000 /* milliseconds */);
        conn.setRequestMethod("GET");
        conn.setDoInput(true);
        // Starts the query
        conn.connect();
        int response = conn.getResponseCode();
        Log.d("DEBUG_TAG", "The response is: " + response);
        is = conn.getInputStream();

        // Makes sure that the InputStream is closed after the app is
        // finished using it.
    } catch (MalformedURLException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (ProtocolException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } finally {
        if (is != null) {
            try {
                is.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        } 
    }

    return null;
}

@Override
protected void onPostExecute(Void result)
{

}
}

Answer 1

以下

错误

etHost.toString().trim();

喜欢

etHost.getText().toString().trim();

Answer 2

使用

        host = etHost.getText().toString().trim();
        username = etUsername.getText().toString().trim();
        password = etPassword.getText().toString().trim();

调用getText()从EditText获取值，而不是仅调用toString()

Answer 3

        host = etHost.toString().trim();

你在字符串中存储了EditText的文本描述..你想要的是它里面的实际文本..把它改成

        host = etHost.getText().toString();

EditText提供奇怪的String输出

3 个答案: