将外部sqlite数据库添加到我的应用程序不会显示整个表如何解决这个问题？

Question

我正在创建具有sqlite数据库的android应用程序，我需要将它添加到应用程序这个数据库包含6个表但是当我使用 adb shell 时它只显示2个表如何解决这个问题我做错了什么？。

我的sqlite数据库需要在oncreate方法上创建，所以它必须是pre_populated

ExternalDBOpenHelper.java

package com.devleb.expandablelistdemo3;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import android.content.Context;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;

public class ExternalDbOpenHelper extends SQLiteOpenHelper {


    public static String DB_PATH;

    public static String DB_NAME;
    public SQLiteDatabase database;
    public final Context context;

    public SQLiteDatabase getDb() {
        return database;
    }

    public ExternalDbOpenHelper(Context context, String databaseName) {
        super(context, databaseName, null, 1);
        this.context = context;

        String packageName = context.getPackageName();
        DB_PATH = String.format("//data//data//%s//databases//", packageName);
        DB_NAME = databaseName;
        openDataBase();
    }


    public void createDataBase() {
        boolean dbExist = checkDataBase();
        if (!dbExist) {
            this.getReadableDatabase();
            try {
                copyDataBase();
            } catch (IOException e) {
                Log.e(this.getClass().toString(), "Copying error");
                throw new Error("Error copying database!");
            }
        } else {
            Log.i(this.getClass().toString(), "Database already exists");
        }
    }

    private boolean checkDataBase() {
        SQLiteDatabase checkDb = null;
        try {
            String path = DB_PATH + DB_NAME;
            checkDb = SQLiteDatabase.openDatabase(path, null,
                    SQLiteDatabase.OPEN_READONLY);
        } catch (SQLException e) {
            Log.e(this.getClass().toString(), "Error while checking db");
        }

        if (checkDb != null) {
            checkDb.close();
        }
        return checkDb != null;
    }

    private void copyDataBase() throws IOException {

        InputStream externalDbStream = context.getAssets().open(DB_NAME);


        String outFileName = DB_PATH + DB_NAME;

        OutputStream localDbStream = new FileOutputStream(outFileName);


        byte[] buffer = new byte[1024];
        int bytesRead;
        while ((bytesRead = externalDbStream.read(buffer)) > 0) {
            localDbStream.write(buffer, 0, bytesRead);
        }

        localDbStream.close();
        externalDbStream.close();

    }

    public SQLiteDatabase openDataBase() throws SQLException {
        String path = DB_PATH + DB_NAME;
        if (database == null) {
            createDataBase();
            database = SQLiteDatabase.openDatabase(path, null,
                SQLiteDatabase.OPEN_READWRITE);
        }
        return database;
    }
    @Override
    public synchronized void close() {
        if (database != null) {
            database.close();
        }
        super.close();
    }
    @Override
    public void onCreate(SQLiteDatabase db) {}
    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {}
}

MatchScheduleList.java

package com.devleb.expandablelistdemo3;

import java.util.ArrayList;


import android.os.Bundle;
import android.app.Activity;
import android.app.ListActivity;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;

public class MatchScheduleList extends ListActivity {

     private static final String DB_NAME = "world_cup.db";
     // *****Tables name**************************//
    // private static final String TABLE_NAME = "place";


     //*****Tbale name******************************//
        private static final String PLACE_ID = "_id";
        //private static final String NAME_NAME = "name";
        private static final String CITY_NAME = "city";


        private SQLiteDatabase database;
        private ListView listView;
        private ArrayList<String> places;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.list_demo_for_match);

           ExternalDbOpenHelper dbOpenHelper = new ExternalDbOpenHelper(this, DB_NAME);
            database = dbOpenHelper.openDataBase();


        }


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

}

Answer 1

以后您似乎更新了数据库。这意味着您需要使用 onUpgrade方法（）将更改反映回Android手机。 将数据库版本作为静态String分配给数据库。每当您创建对数据库的更改时，请确保增加数据库版本字符串中的数字。 这里＆＃39;一个例子

private static final int DATABASE_VERSION =89;
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    // TODO Auto-generated method stub
    db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE);
    //Do this for all 6 of your database tables
    db.execSQL(DATABASE_CREATE);    
    //Do this for all 6 tables
    }