学步园

有离线地图，真的挺方便的。具体可以看看我的应用。

http://as.baidu.com/a/item?docid=4120392&pre=web_am_se

最近有网友不知道如何将离线的百度地图，打包在应用中发布。所以整理了这篇博客与大家分享。

1.使用离线地图。经过测试，首次必须在线验证百度的APIKey。

2.离线地图文件，放到res/raw目录下。参见下图。

3.编写代码拷贝函数。

package com.kkstudio.db;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

import com.kkstudio.parkcar.R;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.os.Environment;
import android.util.Log;

public class DBReleasFromAPK {
	/** Called when the activity is first created. */	
	private static String APK_PATHNAME = "parkcar";
	
	// SD卡下的目录
	private final String DATABASE_PATH = Environment.getExternalStorageDirectory().getPath() + "/" + APK_PATHNAME;
	
	private final String MAP_FILENAME = "beijing_131.dat";
	private final String MAP_FILEPATH = Environment.getExternalStorageDirectory().getPath() + "/BaiduMapSdk/vmp/h/";
	
	// 数据库名
	private final String DATABASE_FILENAME = "data.db";
	private final String IMAGE_FILENAME = "defaultimg.jpg";
	private final String DEFAULT_IMAGE_FILENAME = "default.jpg";
	
	private final String DEFAULT_IMAGE_06FILENAME = "06.jpg";
	
	// 这个context是必需的，没有context，怎么都不能实现数据库的拷贝操作；
	private Context context;

	// 构造函数必需传入Context，数据库的操作都带有这个参数的传入
	public DBReleasFromAPK(Context ctx) {
		this.context = ctx;
//		APK_PATHNAME = this.context.getString(R.string.app_name);
	}

	public SQLiteDatabase OpenDataBase() {
		try {
			String imageFilename = DATABASE_PATH + "/" + IMAGE_FILENAME;
			String defaultimageFilename = DATABASE_PATH + "/" + DEFAULT_IMAGE_FILENAME;
			String default06imageFilename = DATABASE_PATH + "/" + DEFAULT_IMAGE_06FILENAME;
			
			String mapFilename =  MAP_FILEPATH + MAP_FILENAME;
			
			String databaseFilename = DATABASE_PATH + "/" + DATABASE_FILENAME;
			File dir = new File(DATABASE_PATH);
			// 判断SD卡下是否存在存放数据库的目录，如果不存在，新建目录
			if (!dir.exists()) {
				dir.mkdir();
				Log.i("ReleaseDataBaseActivity", "dir made:" + DATABASE_PATH);
			} else {
				Log.i("ReleaseDataBaseActivity", "dir exist:" + DATABASE_PATH);
			}
			try {
				// 如果数据库已经在SD卡的目录下存在，那么不需要重新创建，否则创建文件，并拷贝/res/raw下面的数据库文件
				if (!(new File(databaseFilename)).exists()) {
					Log.i("ReleaseDataBaseActivity", "file not exist:"
							+ databaseFilename);
					// /res/raw数据库作为输出流
					InputStream is = this.context.getResources()
							.openRawResource(R.raw.data);
					// 测试用
					int size = is.available();
					Log.i("ReleaseDataBaseActivity", "DATABASE_SIZE:" + 1);
					Log.i("ReleaseDataBaseActivity", "count:" + 0);
					// 用于存放数据库信息的数据流
					FileOutputStream fos = new FileOutputStream(
							databaseFilename);
					byte[] buffer = new byte[8192];
					int count = 0;
					Log.i("ReleaseDataBaseActivity", "count:" + count);
					// 把数据写入SD卡目录下
					while ((count = is.read(buffer)) > 0) {
						fos.write(buffer, 0, count);
					}
					fos.flush();
					fos.close();
					is.close();
				}
				
				// patch image file
				if (!(new File(defaultimageFilename)).exists()) {
					// /res/raw数据库作为输出流
					InputStream is = this.context.getResources()
							.openRawResource(R.raw.defaultimg);
					// 测试用
					int size = is.available();
					// 用于存放数据库信息的数据流
					FileOutputStream fos = new FileOutputStream(
							defaultimageFilename);
					byte[] buffer = new byte[8192];
					int count = 0;					
					// 把数据写入SD卡目录下
					while ((count = is.read(buffer)) > 0) {
						fos.write(buffer, 0, count);
					}
					fos.flush();
					fos.close();
					is.close();
				}
				
				// patch 06.jpg
				if (!(new File(default06imageFilename)).exists()) {
					// /res/raw数据库作为输出流
					InputStream is = this.context.getResources()
							.openRawResource(R.raw.defaultimg);
					// 测试用
					int size = is.available();
					// 用于存放数据库信息的数据流
					FileOutputStream fos = new FileOutputStream(
							default06imageFilename);
					byte[] buffer = new byte[8192];
					int count = 0;					
					// 把数据写入SD卡目录下
					while ((count = is.read(buffer)) > 0) {
						fos.write(buffer, 0, count);
					}
					fos.flush();
					fos.close();
					is.close();
				}

				// patch download beijing map
				if (!(new File(mapFilename)).exists()) {
					// /res/raw数据库作为输出流
					InputStream is = this.context.getResources()
							.openRawResource(R.raw.beijing_131);
					// 测试用
					int size = is.available();
					// 用于存放数据库信息的数据流
					FileOutputStream fos = new FileOutputStream(
							mapFilename);
					byte[] buffer = new byte[8192];
					int count = 0;					
					// 把数据写入SD卡目录下
					while ((count = is.read(buffer)) > 0) {
						fos.write(buffer, 0, count);
					}
					fos.flush();
					fos.close();
					is.close();
				}

				
			} catch (FileNotFoundException e) {
				Log.e("Database", "File not found");
				e.printStackTrace();
			} catch (IOException e) {
				Log.e("Database", "IO exception");
				e.printStackTrace();
			}
			
			// 实例化sd卡上得数据库，database作为返回值，是后面所有插入，删除，查询操作的借口。
			SQLiteDatabase database = SQLiteDatabase.openOrCreateDatabase(
					databaseFilename, null);
			return database;

		} catch (Exception e) {
		}
		
		return null;
	}

}

4.启动类的onCreate中，调用即可。

	    DBReleasFromAPK dbapk = new DBReleasFromAPK(this);
	    SQLiteDatabase dbsqlite = dbapk.OpenDataBase();

5.剩下的就是别忘记了。修改AndroidManifest.xml，添加存储功能。

6.祝你好运。