Question

我正在尝试创建一个将名称，年龄和maxhr添加到sqlite的活动，并将在Eclipse的listview中显示。 name和age是输入文本。 Maxhr是年龄（输入文本）减去220.但我得到“运算符 - 在争论类型下定义EditText，int”错误。我似乎找不到这个错误的答案。有谁知道如何解决它？

package com.heartrate.monitoring.activities;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextUtils;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import com.example.heartratemonitoringapp.R;
import com.heartrate.monitoring.dao.UserDAO;
import com.heartrate.monitoring.model.User;

public class AddUserActivity extends Activity implements OnClickListener {

    public static final String TAG = "AddUserActivity";

    private EditText mTxtName;
    private EditText mTxtAge;
    private Button mBtnAdd;

    private UserDAO mUserDao;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_add_user);
        getActionBar().setDisplayHomeAsUpEnabled(true);

        initViews();

        this.mUserDao = new UserDAO(this);
    }

    private void initViews() {
        this.mTxtName = (EditText) findViewById(R.id.txt_name);
        this.mTxtAge = (EditText) findViewById(R.id.txt_age);
        this.mBtnAdd = (Button) findViewById(R.id.btn_add);

        this.mBtnAdd.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {

        switch (v.getId()) {
        case R.id.btn_add:
            Editable name = mTxtName.getText();
            Editable age = mTxtAge.getText();

            if (!TextUtils.isEmpty(name) && !TextUtils.isEmpty(age)){
                // add the user to database
                double mhr;
                double maxhr;
                mhr = Double.parseDouble(mTxtAge.getText().toString());;
                maxhr = mhr - 220;
                User createdUser = mUserDao.createUser(
                        name.toString(), age.toString(),
                        maxhr.toString());

                Log.d(TAG, "added user : "+ createdUser.getName());
                Intent intent = new Intent();
                intent.putExtra(ListUserActivity.EXTRA_ADDED_USER, createdUser);
                setResult(RESULT_OK, intent);
                Toast.makeText(this, R.string.user_created_successfully, Toast.LENGTH_LONG).show();
                finish();
            }
            else {
                Toast.makeText(this, R.string.empty_fields_message, Toast.LENGTH_LONG).show();
            }
            break;

        default:
            break;
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        mUserDao.close();
    }
}

Answer 1

删除此行中的额外;：mhr = Double.parseDouble(mTxtAge.getText().toString());;

运算符 - 在参数类型（EditText，int）下定义

1 个答案: