Seterror信号没有消失,搜索正在运行

Question

我在两个编辑文本上实现了set error的代码.

• 首先获取没有null或空值的任何字符串.
• 第二个获取没有null或空值的任何字符串,并且必须具有一些Double值.

代码如下

import java.util.HashMap;
import java.util.Map;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class SearchPlaces extends Activity {
    EditText place;
    EditText distance;
    Button search;
    static String _place;
    static String _distance;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        place = (EditText) findViewById(R.id.place);
        distance = (EditText) findViewById(R.id.distance);
        search = (Button) findViewById(R.id.search);
        search.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                Map<String, String> validate = new HashMap<String, String>();
                _place = place.getText().toString();
                _distance = distance.getText().toString();
                validate.put("placename", _place);
                validate.put("distancenumeric", _distance);
                if (!validateInputInformation(validate)) {
                    return;
                }
                if ((_place == "" && _distance == "")) {
                    Toast.makeText(getApplicationContext(),
                            "Please fill all the information",
                            Toast.LENGTH_SHORT).show();
                } else {
                    _place = place.getText().toString();
                    _distance = distance.getText().toString();
                    Intent placedist = new Intent(getApplicationContext(),
                            MainActivity.class);
                    Bundle bundle = new Bundle();

                    bundle.putString("place", _place);
                    bundle.putString("distance", _distance);

                    placedist.putExtras(bundle);
                    startActivity(placedist);
                }
            }

            private boolean validateInputInformation(
                    Map<String, String> validate) {

                String l_place = validate.get("placename");
                if (l_place == null || l_place.equals("")) {
                    place.setError("Please enter the Place First");
                    return false;
                }

                String l_distance = validate.get("distancenumeric");
                if (l_distance == null || l_distance.equals("")) {
                    distance.setError("Please enter the Distance First");
                    return false;
                }
                if (!isDoubleNumber(l_distance)) {
                    distance.setError("Please enter Numeric Value");
                    return false;
                }

                return true;

            }
            private boolean isDoubleNumber (String num) {
                try {
                    Double.parseDouble(num);
                } catch (NumberFormatException nfe) {
                    return false;
                }
                return true;
            }
        });
    }
}

在实现所有工作正常之后但是当我没有进入并单击搜索按钮时,错误会在第一个编辑框中弹出,之后当我重新输入正确的值作为输入时,错误通知不会消失但是搜索按钮效果很好.

请帮助我,以便可以从第一个编辑框中删除设置错误通知.

Answer 1

写下面的代码行代替if ((_place == "" && _distance == "")),它将解决您的问题.

if (_place.equals("") && _distance.equals(""))