程序包 ohos.global.resource

类 Resource

java.lang.Object

java.io.InputStream

ohos.global.resource.Resource

所有已实现的接口:

Closeable, AutoCloseable

public abstract class Resource
extends InputStream

Describes an input stream from which resource data can be read.

Resource instances can be obtained only using the ResourceManager.getResource(int) method.

从以下版本开始:

1

另请参阅:

ResourceManager, ResourceType

构造器概要

构造器

构造器	说明
Resource()

方法概要

限定符和类型	方法	说明
abstract int	available()	Obtains the total number of bytes that can be read from the resource.
abstract void	close()	Closes this resource and releases any system resources associated with the stream.
int	read()	Reads the next byte from the resource.
abstract int	read(byte[] bytes, int off, int len)	Reads up to len bytes from the resource.

从类继承的方法 java.io.InputStream

mark, markSupported, read, reset, skip

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

Resource

public Resource()

方法详细资料

available

public abstract int available()
                       throws IOException

Obtains the total number of bytes that can be read from the resource.

覆盖:

available 在类中 InputStream

返回:

Returns the total number of bytes that can be read from the resource.

抛出:

IOException - Throws this exception if an I/O error occurs.

read

public abstract int read(byte[] bytes,
                         int off,
                         int len)
                  throws IOException,
                         IndexOutOfBoundsException,
                         NullPointerException

Reads up to len bytes from the resource.

覆盖:

read 在类中 InputStream

参数:

bytes - Indicates the buffer into which the data is read.

off - Indicates the start offset in array bytes at which the data is written.

len - Indicates the maximum number of bytes to read.

返回:

Returns the total number of bytes read into the buffer; returns -1 if there is no more data because the end of the stream has been reached.

抛出:

IOException - Throws this exception if an I/O error occurs.

NullPointerException - Throws this exception if array bytes is null.

IndexOutOfBoundsException - Throws this exception if off is negative, len is negative, or len is greater than bytes.length - off.

另请参阅:

InputStream.read(byte[], int, int)

read

public int read()
         throws IOException

Reads the next byte from the resource.

指定者:

read 在类中 InputStream

返回:

Returns the data of the next byte; returns -1 if the end of the stream has been reached.

抛出:

IOException - Throws this exception if an I/O error occurs.

close

public abstract void close()
                    throws IOException

Closes this resource and releases any system resources associated with the stream.

指定者:

close 在接口中 AutoCloseable

指定者:

close 在接口中 Closeable

覆盖:

close 在类中 InputStream

抛出:

IOException - Throws this exception if an I/O error occurs.