从另一个程序获得 Assests 文件夹下的东西-优快云博客

本文介绍了在Android中如何利用AssetManager类来读取和遍历assets文件夹下的所有文件及子文件夹，包括文件路径的正确指定方式，并通过示例代码展示了具体的实现方法。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

Resources r = this.getResources();
AssetManager a = r.getAssets();
String[] list = a.list("/");
Log.d("test", "Length of / is "+list.length);
for (String s : list) {
Log.d("test", s);
}
按照上面的写法是错误的 String[] names = am.list(""); 中间是空格

也可以AssetManager am = this.getAssets();
String[] names = am.list("");

如果是asset下的子文件夹String[] names= am.list("subfolder");
如果是asset下的文件InputStream in = am.open("file.png");

子文件夹下的文件 InputStream in = am.open("subfolder/file.png");

然后使用

Bitmap bitmap = BitmapFactory.decodeStream(inputStream);

void displayFiles (AssetManager mgr, String path) {
try {
String list[] = mgr.list(path);
if (list != null)
for (int i=0; i<list.length; ++i)
{
Log.v("Assets:", path +"/"+ list[i]);
displayFiles(mgr, path + "/" + list[i]);
}
} catch (IOException e) {
Log.v("List error:", "can't list" + path);
}

一定注意加/

4.这个问题还会遇到解析出来的是系统目录

http://groups.google.com/group/android-developers/browse_thread/thread/2b110c3c30d8df93/7d8191d6302bca2c?pli=1

参看这里

Did this code:

try
{
String fileArray[] = context.getAssets().list( "" );

if( fileArray != null)
for( int i = 0; i < fileArray.length; ++i )
{
Log.v( " ASSETS_DIR File", fileArray[i] );
try
{
String subfileArray[] =
context.getAssets().list( fileArray[i] );

if( subfileArray != null)
for( int j = 0; j < subfileArray.length; ++j )
{
Log.v( " ASSETS_SUBDIR File", fileArray[i] + ":" +
subfileArray[j] );
}

}
catch( IOException e)
{
Log.e( "ASSETS_SUBDIR", "Can't List files!" );
}

}

}
catch( IOException e)
{
Log.e( "ASSETS_DIR", "Can't List files!" );
}

And got the following result.

DUMP from logcat !

V/ASSETS_DIR File(7570): images
V/ASSETS_SUBDIR File(7570): images:corky.png
V/ASSETS_SUBDIR File(7570): images:cylon_dot.png
V/ASSETS_SUBDIR File(7570): images:cylon_left.png
V/ASSETS_SUBDIR File(7570): images:cylon_right.png
V/ASSETS_SUBDIR File(7570): images:violet.png
V/ASSETS_DIR File(7570): skins
V/ASSETS_SUBDIR File(7570): skins:contact-andy-rubin.png
V/ASSETS_SUBDIR File(7570): skins:contact-larry-page.png
V/ASSETS_DIR File(7570): sounds
V/ASSETS_SUBDIR File(7570): sounds:bootanim0.raw
V/ASSETS_SUBDIR File(7570): sounds:bootanim1.raw
V/ASSETS_DIR File(7570): webkit
V/ASSETS_SUBDIR File(7570): webkit:missingImage.png
V/ASSETS_SUBDIR File(7570): webkit:nullplugin.png
V/ASSETS_SUBDIR File(7570): webkit:textAreaResizeCorner.png

void displayFiles (AssetManager mgr, String path) {
try {
String list[] = mgr.list(path);
if (list != null)
for (int i=0; i<list.length; ++i)
{
Log.v("Assets:", path +"/"+ list[i]);
displayFiles(mgr, path + list[i]);
}
} catch (IOException e) {
Log.v("List error:", "can't list" + path);
}

}

AssetManager mgr = new AssetManager();
displayFiles(mgr, "/");

prints:

V/Assets: (13257): //AndroidManifest.xml
V/Assets: (13257): //META-INF
V/Assets: (13257): //assets
V/Assets: (13257): //res
V/Assets: (13257): //resources.arsc

displayFiles(mgr, "");

prints:

displayFiles(mgr, "");

prints:

V/Assets: (14399): /images
V/Assets: (14399): images/corky.png
V/Assets: (14399): images/cylon_dot.png
V/Assets: (14399): images/cylon_left.png
V/Assets: (14399): images/cylon_right.png
V/Assets: (14399): images/violet.png
V/Assets: (14399): /skins
V/Assets: (14399): skins/contact-andy-rubin.png
V/Assets: (14399): skins/contact-larry-page.png
V/Assets: (14399): /sounds
V/Assets: (14399): sounds/bootanim0.raw
V/Assets: (14399): sounds/bootanim1.raw
V/Assets: (14399): /webkit
V/Assets: (14399): webkit/missingImage.png
V/Assets: (14399): webkit/nullplugin.png
V/Assets: (14399): webkit/textAreaResizeCorner.png