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我正在使用 sqlite 中的数据库，该数据库使用两个按钮和一个 EditText 字段来检索用户输入并在数据库中显示相应的记录。我的一个按钮出现错误，我不确定是什么原因造成的，我尝试实现各种代码行并进行清理，希望有人能对导致问题的原因有所了解.我得到的错误是我的按钮无法放入变量中。我已将 (*) 符号放在发生问题的位置。非常感谢任何帮助。

package com.example.database;

import android.app.Activity;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;



public class DBUse extends Activity  {
    EditText dEdit;
    SQLiteDatabase data;
    public static final String KEY_ROWID = "_id";
    public static final String KEY_BUSINESS = "business";
    public static final String KEY_ADDRESS = "address";
    public static final String KEY_PHONE = "phone";
    public static final String KEY_HOURS = "hours";
    public static final String KEY_WEB = "website";
    public static final String KEY_TYPE = "type";




    @Override
    public void onCreate(Bundle savedInstanceState) {

        // TODO Auto-generated method stub


        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        MainActivity datab = new MainActivity(this);

        Button buttonName =(Button)findViewById(R.id.buttonName);
        buttonName.setOnClickListener(startName);

        **Button buttonType =(Button)findViewById(R.id.buttonType);
        buttonType.setOnClickListener(startType);**

        dEdit =(EditText)findViewById(R.id.textView1);

        datab.open();


        Cursor c = datab.getAllTitles();
        if(c.moveToFirst())
        {
            do{DisplayTitle(c);
        }while (c.moveToNext());
    }   
        datab.open();
        Cursor b = datab.getAllTitles();

        if (b.moveToFirst())
            DisplayTitle(b);
        else
            Toast.makeText(this,"No business found",Toast.LENGTH_LONG).show();
        data.close();

    data.close();


    }



//displays the data

    public void DisplayTitle(Cursor c)  {
        Toast.makeText(this,
        "Name: " + c.getString(1)+"\n"+
        "Address:" + c.getString(2)+"\n"+
        "Phone:" + c.getString(3)+"\n"+
        "Hours:" + c.getString(4)+"\n"+
        "Website"+ c.getShort(5)+
        "Type" + c.getShort(6),
        Toast.LENGTH_LONG).show();


    }

    //Informs the user what is being searched
    private OnClickListener startName=new OnClickListener(){

        public void onClick (View v) {

            Cursor cur=data.rawQuery("SELECT business,address,phone,hours,website,type FROM Business where name like %"+dEdit.getText().toString()+"%", null);
            String result="";

            int iRow=cur.getColumnIndex(KEY_ROWID);
            int iName=cur.getColumnIndex(KEY_BUSINESS);
            int iAddress=cur.getColumnIndex(KEY_ADDRESS);
            int iPhone=cur.getColumnIndex(KEY_PHONE);
            int iHours=cur.getColumnIndex(KEY_HOURS);
            int iWebsite=cur.getColumnIndex(KEY_WEB);
            int iType=cur.getColumnIndex(KEY_TYPE);
            Toast.makeText(DBUse.this, "Searching by Name", Toast.LENGTH_LONG).show();
        //  log.d("result",DBUse.getString(0));
            for(cur.moveToFirst(); !cur.isAfterLast(); cur.moveToNext()){
                result=result +cur.getString(iRow) + " "
                        +cur.getString(iName) + " "
                        +cur.getString(iAddress) + " "
                        +cur.getString(iPhone) + " "
                        +cur.getString(iHours) + " "
                        +cur.getString(iWebsite) + " "
                    +cur.getString(iType) + " " + "\n";

            }
            return;
        };




        //Informs the user what is being searched
        **private OnClickListener startType=new OnClickListener(){

            public void onClick (View v){
            Cursor cur=data.rawQuery("SELECT business,address,phone,hours,website,type FROM Business where type like %"+dEdit.getText().toString()+"%", null);**
            String result="";
            int iRow=cur.getColumnIndex(KEY_ROWID);
            int iName=cur.getColumnIndex(KEY_BUSINESS);
            int iAddress=cur.getColumnIndex(KEY_ADDRESS);
            int iPhone=cur.getColumnIndex(KEY_PHONE);
            int iHours=cur.getColumnIndex(KEY_HOURS);
            int iWebsite=cur.getColumnIndex(KEY_WEB);
            int iType=cur.getColumnIndex(KEY_TYPE);
            Toast.makeText(DBUse.this, "Searching by Name", Toast.LENGTH_LONG).show();
        //  log.d("result",DBUse.getString(0));
            for(cur.moveToFirst(); !cur.isAfterLast(); cur.moveToNext()){
                result=result +cur.getString(iRow) + " "
                        +cur.getString(iName) + " "
                        +cur.getString(iAddress) + " "
                        +cur.getString(iPhone) + " "
                        +cur.getString(iHours) + " "
                        +cur.getString(iWebsite) + " "
                        +cur.getString(iType) + " " + "\n";


            }
            return;
        }


        };
    };
}

问题错误信息：

Description Resource    Path    Location    Type
startType cannot be resolved to a variable  DBUse.java  /database/src/com/example/database  line 43 Java Problem
4

1 回答 1

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在您的情况下，您将在OnClickListener startType内部声明OnClickListener startName. 我认为这应该是两种不同的方法。

于 2013-04-27T07:43:47.850 回答