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我想用 SQLite 数据库中的数据填充我的 listView。但在填充之前，我必须创建数据库并用一些记录填充它。

我有一个 sql 文件，其中包含插入查询和要作为记录插入的相应值。

比如说，它包含查询，如 INSERT INTO 'tablename' (data1, data2) Values('1','2'),('3','4') 等。

所以我只需要在 SQLite DB 中执行相同的查询，并通过在 SQLite DB 表单中映射这个查询来在表中插入数据。对于多条记录插入，我在 ThemeTourActivity.java 中运行了以下查询，我想在其中显示 ListView：

INSERT INTO 'tablename' SELECT 'data1' AS 'col1', 'data2' AS 'col2'
UNION SELECT 'value1', 'value2'
UNION SELECT 'value3', 'value4' 
and so on..

下面是我的 SQLiteOpenHelper 类：

public class ToursOpenHelper extends SQLiteOpenHelper{
    public static final String DATABASE_NAME="WeTrip_DB";
    public static final int DATABASE_VERSION=1;
    //table's abstract implementations using BASECOLUMNS
    public static abstract class tourEntry implements BaseColumns
    {

        public static final String TABLE="tour";
        public static final String TOURTYPE="tour_type";
        public static final String TOURNAME="tour_name";
        public static final String NIGHTS="nights";
        public static final String DAYS="days";
        public static final String PIC="pic";
    }

    public static abstract class tourcatEntry implements BaseColumns
    {
        public static final String TABLE="tour_cat";
        public static final String TOURCAT_DESC="tourcat_desc";
        public static final String TOURCAT_NAME="tourcat_name";
        public static final String TOURCAT_IMG="tourcat_img";
    }

    public static abstract class tourdestEntry implements BaseColumns
    {
        public static final String TABLE="tour_dest";
        public static final String TOUR_ID="tour_id";
        public static final String DEST_ID="dest_id";
    }

    public static abstract class destEntry implements BaseColumns
    {
        public static final String TABLE="destination";
        public static final String DEST_NAME="dest_name";
    }

    //create DB TABLES
    public static final String CREATE_TABLE_TOUR="CREATE TABLE "+tourEntry.TABLE + 
            "(" 
            + tourEntry._ID+" INTEGER PRIMARY KEY AUTOINCREMENT, "+
            tourEntry.TOURTYPE + " INTEGER ," +
            tourEntry.TOURNAME + " TEXT ," +
            tourEntry.NIGHTS + " INTEGER ," + 
            tourEntry.DAYS + " INTEGER ,"+
            tourEntry.PIC + " TEXT)";

    public static final String CREATE_TABLE_TOURCAT="CREATE TABLE "+tourcatEntry.TABLE + 
            "(" 
            + tourcatEntry._ID+" INTEGER PRIMARY KEY AUTOINCREMENT , "+
            tourcatEntry.TOURCAT_NAME + " TEXT ," +
            tourcatEntry.TOURCAT_DESC + " TEXT ," +
            tourcatEntry.TOURCAT_IMG + " TEXT)";

    public static final String CREATE_TABLE_TOURDEST="CREATE TABLE "+tourdestEntry.TABLE + 
            "(" 
            + tourdestEntry._ID+" INTEGER PRIMARY KEY AUTOINCREMENT , "+
            tourdestEntry.TOUR_ID + " INTEGER ," +
            tourdestEntry.DEST_ID + " INTEGER)";

    public static final String CREATE_TABLE_DEST="CREATE TABLE "+destEntry.TABLE + 
            "(" 
            + destEntry._ID+" INTEGER PRIMARY KEY AUTOINCREMENT , "+
            destEntry.DEST_NAME + " TEXT)";
    //DELETE DB TABLES
    public static final String DELETE_TABLE_TOUR="DROP TABLE "+tourEntry.TABLE + " IF EXISTS ";
    public static final String DELETE_TABLE_TOURCAT="DROP TABLE "+tourcatEntry.TABLE + " IF EXISTS ";
    public static final String DELETE_TABLE_TOURDEST="DROP TABLE "+tourdestEntry.TABLE + " IF EXISTS ";
    public static final String DELETE_TABLE_DEST="DROP TABLE "+destEntry.TABLE + " IF EXISTS ";

    public ToursOpenHelper(Context context) {
        super(context, DATABASE_NAME, null, DATABASE_VERSION);
        // TODO Auto-generated constructor stub
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        // TODO Auto-generated method stub
        db.execSQL(CREATE_TABLE_TOUR);
        db.execSQL(CREATE_TABLE_TOURCAT);
        db.execSQL(CREATE_TABLE_TOURDEST);
        db.execSQL(CREATE_TABLE_DEST);
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        // TODO Auto-generated method stub
        db.execSQL(DELETE_TABLE_TOUR);
        db.execSQL(DELETE_TABLE_TOURCAT);
        db.execSQL(DELETE_TABLE_TOURDEST);
        db.execSQL(DELETE_TABLE_DEST);
    }    
}

下面是我的 ThemeToursActivity.java，其中必须从 DataBase 填充 listView ：

package com.example.travelplanner;

import java.util.ArrayList;

import android.os.Bundle;
import android.app.Activity;
import android.database.sqlite.SQLiteDatabase;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;

public class ThemeTourActivity extends Activity implements OnItemClickListener {

    //ArrayList<ThemeTourModel> tour_details = themeTourResults();
    SQLiteDatabase db;
    ToursOpenHelper helper;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_theme_tour);
        final ListView tourList = (ListView)findViewById(R.id.theme_tour_listview);
        tourList.setAdapter(new ThemeTourCustomAdapter(this,tour_details));
        tourList.setOnItemClickListener(this);

        helper = new ToursOpenHelper(this);
        db = helper.getWritableDatabase();
    }

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

    @Override
    public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
        // TODO Auto-generated method stub

    }

}

我很困惑如何实现这一目标。我只想创建一个数据库，在其中插入多条记录并检索数据并填充 listView。如果有人可以指导我完成这将是一个很大的帮助。在过去的几天里，我一直坚持下去。

4

1 回答 1

1

如果要插入值，则可以像这样在 SQLHelper 类中创建函数

public void InsertData(String Name,int Age,int Address)
    {
        ContentValues values = new ContentValues();  

        values.put("Name",Name); 
        values.put("Age", Age); 
        values.put("Address", Address);

        this.db.insert(Table_Name, null, values);
    }

（在内容值中，您将把列名及其值存储在表中）；

如果你想得到这个值然后这样做

public Cursor GetData() throws Exception 
    {   
        Cursor cursor;

        cursor = this.db.query(Table_Name,null, null, null, null, null, null,null );

        return cursor;
    }

如果要获取特定的列值，则可以在表名之后传递列名数组。它将返回光标，因此请为您的列表视图使用光标适配器。

Cursor c = db.GetData();


ListLayout mCursorAdapter = new ListLayout(
                        getApplicationContext(),                    // The application's Context object
                        R.layout.list_item,        // A layout in XML for one row in the ListView
                        c,                                          // The result from the query
                        new String[] {"Name"},      // A string array of column names in the cursor
                        new int[] { R.id.txtName },0);          // An integer array of view IDs in the row layout


                // Sets the adapter for the ListView
                lv.setAdapter(mCursorAdapter);
于 2013-07-29T05:02:44.743 回答