import android.content.Context;
import android.content.ContextWrapper;
import android.database.DatabaseErrorHandler;
import android.database.sqlite.SQLiteDatabase;

import com.tbc.android.defaults.app.business.cache.AppUserCache;
import com.tbc.android.defaults.app.utils.AppPathUtil;
import com.tbc.android.mc.storage.ApplicationCache;

import java.io.File;

/**
 * Created by Doraemon
 * Date: 16/5/12
 * Time: 09:22
 * Summary:該類(lèi)主要用于基于GreenDao框架自定義數(shù)據(jù)庫(kù)路徑
 */
public class GreenDaoContext extends ContextWrapper {

    private String currentUserId;
    private Context mContext;

    public GreenDaoContext() {
        super(ApplicationCache.context);
        this.mContext = ApplicationCache.context;
        this.currentUserId = AppUserCache.userInfo.getUserId();
    }

    /**
     * 獲得數(shù)據(jù)庫(kù)路徑，如果不存在，則創(chuàng)建對(duì)象
     *
     * @param dbName
     */
    @Override
    public File getDatabasePath(String dbName) {
        File baseFile = AppPathUtil.getDbCacheDir(mContext);
        StringBuffer buffer = new StringBuffer();
        buffer.append(baseFile.getPath());
        buffer.append(File.separator);
        buffer.append(currentUserId);
        buffer.append(File.separator);
        buffer.append(dbName);
        return new File(buffer.toString());
    }

    /**
     * 重載這個(gè)方法垫挨，是用來(lái)打開(kāi)SD卡上的數(shù)據(jù)庫(kù)的，android 2.3及以下會(huì)調(diào)用這個(gè)方法。
     *
     * @param name
     * @param mode
     * @param factory
     */
    @Override
    public SQLiteDatabase openOrCreateDatabase(String name, int mode,
                                               SQLiteDatabase.CursorFactory factory) {
        SQLiteDatabase result = SQLiteDatabase.openOrCreateDatabase(getDatabasePath(name), factory);
        return result;
    }

    /**
     * Android 4.0會(huì)調(diào)用此方法獲取數(shù)據(jù)庫(kù)夜只。
     *
     * @param name
     * @param mode
     * @param factory
     * @param errorHandler
     * @see android.content.ContextWrapper#openOrCreateDatabase(java.lang.String, int,
     * android.database.sqlite.SQLiteDatabase.CursorFactory,
     * android.database.DatabaseErrorHandler)
     */
    @Override
    public SQLiteDatabase openOrCreateDatabase(String name, int mode, SQLiteDatabase.CursorFactory factory,
                                               DatabaseErrorHandler errorHandler) {
        SQLiteDatabase result = SQLiteDatabase.openOrCreateDatabase(getDatabasePath(name), factory);

        return result;
    }

}

自定義一個(gè)context，然后在獲取helper時(shí)蒜魄，將自定義的context傳入扔亥，如下：

DaoMaster.DevOpenHelper helper = new DaoMaster.DevOpenHelper(new GreenDaoContext(), "app.db", null);
SQLiteDatabase db = helper.getWritableDatabase();
// 注意：該數(shù)據(jù)庫(kù)連接屬于 DaoMaster场躯，所以多個(gè) Session 指的是相同的數(shù)據(jù)庫(kù)連接。
DaoMaster daoMaster = new DaoMaster(db);
DaoSession daoSession = daoMaster.newSession();