百度——地图API——Android—应用集成离线地图

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。

[java] view
plaincopy

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。

[java] view
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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。