Use of assetmanager asset

 

The Android system provides a/assets folder for each newly designed program. The files saved in this folder can be packaged in the program. The difference between/RES and/assets is that android does not generate an ID for the file in/assets. Assume that the file under/assets needs to be specified. The following example shows how to configure the content of assets.

Create a/image subfolder in the/assets file and copy the icon.png subfolder under/RES/drawableto this folder. Create the readme.txt file in the/assetsfolder, and enter the text "Hello, world!" in the file !!!".

Layout file: Main. xml

<? XML version ="1.0"Encoding ="UTF-8"?>

<Linearlayoutxmlns: Android =Http://schemas.android.com/apk/res/android"

Android: Orientation ="Vertical"

Android: layout_width ="Fill_parent"

Android: layout_height ="Fill_parent"

>

<Textview

Android: layout_width ="Fill_parent"

Android: layout_height ="Wrap_content"

Android: text ="@ String/hello"

/>

<Edittext Android: Id ="@ + ID/firstid"

Android: layout_width ="Fill_parent"

Android: layout_height ="Wrap_content"

Android: text ="@ String/hello"

/>

<Edittext Android: Id ="@ + ID/secondid"

Android: layout_width ="Fill_parent"

Android: layout_height ="Wrap_content"

Android: text ="@ String/hello"

/>

 

</Linearlayout>

 

Program file:

PackageCom.cn. getassets;

 

ImportAndroid. App. activity;

ImportAndroid. OS. Bundle;

ImportJava. Io. bytearrayoutputstream;

ImportJava. Io. ioexception;

ImportJava. Io. inputstream;

ImportAndroid. App. activity;

ImportAndroid. content. res. assetmanager;

ImportAndroid. OS. Bundle;

ImportAndroid. util. log;

ImportAndroid. widget. edittext;

 

 

 

Public ClassGetassetsExtendsActivity {

 PrivateEdittextfirstfield;

 PrivateEdittextsecondfield;

@ Override

 Public VoidOncreate (bundle savedinstancestate ){

 Super. Oncreate (savedinstancestate );

// Log. D ("showmain. xml", "OK ");

Setcontentview (R. layout.Main);

Log.D("Showmain. xml", "OK ");

Assetmanager = getassets ();

String [] files =Null;

Try{

Files = assetmanager. List ("image ");

}Catch(Ioexception e ){

Log.E("Tag", E. getmessage ());

}

Firstfield = (edittext) findviewbyid (R. Id.Firstid);

Firstfield. settext (integer.Tostring(Files. Length) + "file. filename is" + files [0]);

Inputstream =Null;

Try{

Inputstream = assetmanager. Open ("readme.txt ");

}Catch(Ioexception e ){

Log.E("Tag", E. getmessage ());

}

String S = readtextfile (inputstream );

Secondfield = (edittext) findviewbyid (R. Id.Secondid);

Secondfield. settext (s );

}

 

 PrivateStringreadtextfile (inputstream ){

Bytearrayoutputstreamoutputstream =NewBytearrayoutputstream ();

ByteBuf [] =NewByte[1024];

IntLen;

Try{

While(LEN = inputstream. Read (BUF ))! =-1 ){

Outputstream. Write (BUF, 0, Len );

}

Outputstream. Close ();

Inputstream. Close ();

}Catch(Ioexception e ){

}

ReturnOutputstream. tostring ();

}

}

Program display result: Use the simulator.

Http://blog.sina.com.cn/s/blog_6cf0d3f30100m2x6.html

Use of assetmanager asset