Android开发之获取assets文件夹中的数据库内容并写入到SD卡中

import

java.io.File;

02

import

java.io.FileOutputStream;

03

import

java.io.IOException;

04

import

java.io.InputStream;

05

import

android.content.Context;

06

/*将assets文件夹下的数据库写入SD卡中

07

*
@authorDave*/

08

public

class

WriteToSD
{

09

private

Context
context;

10

String
filePath=android.os.Environment.getExternalStorageDirectory()+

"/mytest"

;

11

public

WriteToSD(Context
context){

12

this

.context
=context;

13

if

(!isExist()){

14

write();

15

}

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}

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private

void

write(){

18

InputStream
inputStream;

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try

{

20

inputStream
=context.getResources().getAssets().open(

"city.db"

);

21

File
file=

new

File(filePath);

22

if

(!file.exists()){

23

file.mkdirs();

24

}

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FileOutputStream
fileOutputStream=

new

FileOutputStream(filePath
+

"/database.db"

);

26

byte

[]
buffer=

new

byte

[

512

];

27

int

count
=

0

;

28

while

((count
=inputStream.read(buffer))>

0

){

29

fileOutputStream.write(buffer,

0

,count);

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}

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fileOutputStream.flush();

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fileOutputStream.close();

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inputStream.close();

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System.out.println(

"success"

);

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}

catch

(IOException
e){

36

e.printStackTrace();

37

}

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}

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private

boolean

isExist(){

40

File
file=

new

File(filePath
+

"/database.db"

);

41

if

(file.exists()){

42

return

true

;

43

}

else

{

44

return

false

;

45

}

46

}

47

}