android中的sqlite示例程序

package com.mypackage.quaddeals;

import android.net.Uri;
import android.provider.basecolumns;

public interface Constants extends Basecolumns {
    public static final String table_NAME = "user_deal";

    public static final String AUTHORITY = "com.mypackage.quaddeals";
    public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY
            + "/" + TABLE_Name);

    public static final String titlE = "title";
    public static final String CITYID = "cityid";

}

2.bruPress数据类……

package com.mypackage.quaddeals;

import static android.provider.basecolumns._ID;

import static com.mypackage.quaddeals.Constants.CITYID;
import static com.mypackage.quaddeals.Constants.titlE;
import static com.mypackage.quaddeals.Constants.TABLE_NAME;

import android.content.Context;
import android.database.sqlite.sqliteDatabase;
import android.database.sqlite.sqliteOpenHelper;
import android.util.Log;

public class Bru_Press_Data extends sqliteOpenHelper {
    public static final String DATABASE_NAME = "QuadDeals.db";
    public static final int DATABASE_VERSION = 1;

    /** Create a Helper object for the Events database */
    public Bru_Press_Data(Context ctX) {
        super(ctx,DATABASE_NAME,null,DATABASE_VERSION);

    }

    @Override
    public void onCreate(sqliteDatabase db) {
        try {
            db.execsql("create table " + TABLE_NAME + " (" + _ID
                    + " INTEGER PRIMARY KEY AUTOINCREMENT," + titlE
                    + " TEXT UNIQUE," + CITYID + " TEXT);");            
        } catch (Exception E) {
            Log.v("Bru_Press_Data","exception in table created");
        }
    }
    @Override
    public void onUpgrade(sqliteDatabase db,int oldVersion,int newVersion) {
        db.execsql("drop table IF EXISTS " + TABLE_Name);
        onCreate(db);
    }

}

3.Provider类

package com.mypackage.quaddeals;

import static android.provider.basecolumns._ID;

import static com.mypackage.quaddeals.Constants.CONTENT_URI;
import static com.mypackage.quaddeals.Constants.AUTHORITY;
import static com.mypackage.quaddeals.Constants.TABLE_NAME;

import android.app.SearchManager;
import android.content.ContentProvider;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.UriMatcher;
import android.database.cursor;
import android.database.sqlite.sqliteDatabase;
import android.net.Uri;
import android.text.TextUtils;
import android.util.Log;

public class Bru_Press_Provider extends ContentProvider {
    private static final int QUADUSER = 1;
    private static final int QUADuser_iD = 2;
    /** The MIME type of a directory of events */
    private static final String CONTENT_TYPE = "vnd.android.cursor.dir/vnd.example.brown";

    /** The MIME type of a single event */
    private static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/vnd.example.brown";
    private static final String CONTENT_TYPE1 = "vnd.android.cursor.dir/vnd.example.brown";

    /** The MIME type of a single event */
    private static final String CONTENT_ITEM_TYPE1 = "vnd.android.cursor.item/vnd.example.brown";
//    private static final String CONTENT_TYPE2 = "vnd.android.cursor.dir/vnd.example.brown";

    /** The MIME type of a single event */
//  private static final String CONTENT_ITEM_TYPE2 = "vnd.android.cursor.item/vnd.example.brown";
    private Bru_Press_Data news;
    private UriMatcher uriMatcher;

    private cursor cursor;
    private sqliteDatabase db;
    String[] str;

    @Override
    public Boolean onCreate() {

        uriMatcher = new UriMatcher(UriMatcher.NO_MATCH);
        uriMatcher.addURI(AUTHORITY,"user_deal",QUADUSER);
        uriMatcher.addURI(AUTHORITY,"user_deal/#",QUADuser_iD);

        news = new Bru_Press_Data(getContext());
        return true;
    }

    @Override
    public cursor query(Uri uri,String[] projection,String selection,String[] SELEctionArgs,String orderBy) {
        sqliteDatabase db;
        cursor cursor = null;
        if (uriMatcher.match(uri) == QUADuser_iD) {
            long id = Long.parseLong(uri.getPathSegments().get(1));
            SELEction = appendRowId(SELEction,id);
        }
        if (uriMatcher.match(uri) == QUADUSER) {
            // Get the database and run the query
            db = news.getReadableDatabase();
            cursor = db.query(TABLE_NAME,projection,SELEction,SELEctionArgs,orderBy);
        }
        cursor.setNotificationUri(getContext().getContentResolver(),uri);
        return cursor;
    }

    @Override
    public String getType(Uri uri) {
        switch (uriMatcher.match(uri)) {
        case QUADUSER:
            return CONTENT_TYPE;
        case QUADuser_iD:
            return CONTENT_ITEM_TYPE;
        default:
            throw new IllegalArgumentexception("UnkNown URI " + uri);
        }
    }

    @Override
    public Uri insert(Uri uri,ContentValues values) {

        sqliteDatabase db = news.getWritableDatabase();
        Uri newUri = null;
        long id = -1;
        // Validate the requested uri

        if (uriMatcher.match(uri) == QUADUSER) {
            try {

                id = db.insertOrThrow(TABLE_NAME,values);
                // Notify any watchers of the change
                newUri = ContentUris.withAppendedId(CONTENT_URI,id);
                getContext().getContentResolver().notifyChange(newUri,null);

            } catch (NullPointerException E) {
                    Log.v("Error","OnInsert"+E);
            }
        } 
        else if (uriMatcher.match(uri) != QUADUSER) {
            throw new IllegalArgumentexception("UnkNown URI bru press " + uri);
        }

        return newUri;
    }

    @Override
    public int delete(Uri uri,String[] SELEctionArgs) {
        sqliteDatabase db = news.getWritableDatabase();
        int count;
        long id;        
        Log.v("delete",SELEction);
        switch (uriMatcher.match(uri)) {

        case QUADUSER:
            count = db.delete(TABLE_NAME,SELEctionArgs);
            break;
        case QUADuser_iD:
            id = Long.parseLong(uri.getPathSegments().get(1));
            count = db.delete(TABLE_NAME,appendRowId(SELEction,id),SELEctionArgs);
            break;
        default:
            throw new IllegalArgumentexception("UnkNown URI " + uri);
        }
        getContext().getContentResolver().notifyChange(uri,null);
        return count;
    }

    @Override
    public int update(Uri uri,ContentValues values,String[] SELEctionArgs) {
        sqliteDatabase db = news.getWritableDatabase();
        int count;
        long id;        
        switch (uriMatcher.match(uri)) {
        case QUADUSER:
            count = db.update(TABLE_NAME,values,SELEctionArgs);
            break;
        case QUADuser_iD:
            id = Long.parseLong(uri.getPathSegments().get(1));
            count = db.update(TABLE_NAME,SELEctionArgs);
            break;
        default:
            throw new IllegalArgumentexception("UnkNown URI " + uri);
        }

        // Notify any watchers of the change
        getContext().getContentResolver().notifyChange(uri,null);
        return count;
    }

    /** Append an id test to a sql SELEction expression */
    private String appendRowId(String selection,long id) {
        return _ID
                + "="
                + id
                + (!TextUtils.isEmpty(SELEction) ? " AND (" + SELEction + ')'
                        : "");
    }

}

注意：您希望在Manifest文件中定义此Provider类@H_404_2@.

在另一个类中,我可以将数据插入并检索到DB …具体如下

class A extends Activity{

  {

 addevent(cityname,cityid);  // to insert
 }

  private void addevent(String a1,String a2) {
        try {
            ContentValues values = new ContentValues();         
            values.put(Constants.titlE,a1);
            values.put(Constants.CITYID,a2);   
            getContentResolver().insert(Constants.CONTENT_URI,values);

        } catch (Exception E) {
            Log.v("Error",""+E);
        }
    }

从Db中检索

cursor c = getContentResolver().query(Constants.CONTENT_URI,null);
            int a = c.getCount();
            Log.v("Count",""+a);

               int columnIndex  =  c.getcolumnIndex(Constants.titlE);
               int columnIndex2 =  c.getcolumnIndex(Constants.CITYID);
                if (c.moveToNext()) {
                  cityName = c.getString(columnIndeX);
                  city_id= c.getString(columnIndex2);
                }

  }

试试这样的事……它会对你有所帮助