Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Summary: [Methods](https://developer.android.com/reference/android/content/res/AssetManager.AssetInputStream#pubmethods) \| [Inherited Methods](https://developer.android.com/reference/android/content/res/AssetManager.AssetInputStream#inhmethods)
# AssetManager.AssetInputStream
*** ** * ** ***
`
public
final
class
AssetManager.AssetInputStream
`
`
`
`
extends https://developer.android.com/reference/java/io/InputStream
`
`
`
|---|---|---|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) |||
| ↳ | [java.io.InputStream](https://developer.android.com/reference/java/io/InputStream) ||
| | ↳ | android.content.res.AssetManager.AssetInputStream |
*** ** * ** ***
## Summary
| ### Public methods ||
|---|---|
| ` int` | ` https://developer.android.com/reference/android/content/res/AssetManager.AssetInputStream#available()() ` Returns an estimate of the number of bytes that can be read (or skipped over) from this input stream without blocking, which may be 0, or 0 when end of stream is detected. |
| ` void` | ` https://developer.android.com/reference/android/content/res/AssetManager.AssetInputStream#close()() ` Closes this input stream and releases any system resources associated with the stream. |
| ` void` | ` https://developer.android.com/reference/android/content/res/AssetManager.AssetInputStream#mark(int)(int readlimit) ` Marks the current position in this input stream. |
| ` boolean` | ` https://developer.android.com/reference/android/content/res/AssetManager.AssetInputStream#markSupported()() ` Tests if this input stream supports the `mark` and `reset` methods. |
| ` int` | ` https://developer.android.com/reference/android/content/res/AssetManager.AssetInputStream#read()() ` Reads the next byte of data from the input stream. |
| ` int` | ` https://developer.android.com/reference/android/content/res/AssetManager.AssetInputStream#read(byte[],%20int,%20int)(byte[] b, int off, int len) ` Reads up to `len` bytes of data from the input stream into an array of bytes. |
| ` int` | ` https://developer.android.com/reference/android/content/res/AssetManager.AssetInputStream#read(byte[])(byte[] b) ` Reads some number of bytes from the input stream and stores them into the buffer array `b`. |
| ` void` | ` https://developer.android.com/reference/android/content/res/AssetManager.AssetInputStream#reset()() ` Repositions this stream to the position at the time the `mark` method was last called on this input stream. |
| ` long` | ` https://developer.android.com/reference/android/content/res/AssetManager.AssetInputStream#skip(long)(long n) ` Skips over and discards `n` bytes of data from this input stream. |
| ### Inherited methods |
|---|---|
| From class ` https://developer.android.com/reference/java/io/InputStream ` |---|---| | ` int` | ` https://developer.android.com/reference/java/io/InputStream#available()() ` Returns an estimate of the number of bytes that can be read (or skipped over) from this input stream without blocking, which may be 0, or 0 when end of stream is detected. | | ` void` | ` https://developer.android.com/reference/java/io/InputStream#close()() ` Closes this input stream and releases any system resources associated with the stream. | | ` void` | ` https://developer.android.com/reference/java/io/InputStream#mark(int)(int readlimit) ` Marks the current position in this input stream. | | ` boolean` | ` https://developer.android.com/reference/java/io/InputStream#markSupported()() ` Tests if this input stream supports the `mark` and `reset` methods. | | ` static https://developer.android.com/reference/java/io/InputStream` | ` https://developer.android.com/reference/java/io/InputStream#nullInputStream()() ` Returns a new `InputStream` that reads no bytes. | | ` int` | ` https://developer.android.com/reference/java/io/InputStream#read(byte[])(byte[] b) ` Reads some number of bytes from the input stream and stores them into the buffer array `b`. | | ` abstract int` | ` https://developer.android.com/reference/java/io/InputStream#read()() ` Reads the next byte of data from the input stream. | | ` int` | ` https://developer.android.com/reference/java/io/InputStream#read(byte[],%20int,%20int)(byte[] b, int off, int len) ` Reads up to `len` bytes of data from the input stream into an array of bytes. | | ` byte[]` | ` https://developer.android.com/reference/java/io/InputStream#readAllBytes()() ` Reads all remaining bytes from the input stream. | | ` int` | ` https://developer.android.com/reference/java/io/InputStream#readNBytes(byte[],%20int,%20int)(byte[] b, int off, int len) ` Reads the requested number of bytes from the input stream into the given byte array. | | ` byte[]` | ` https://developer.android.com/reference/java/io/InputStream#readNBytes(int)(int len) ` Reads up to a specified number of bytes from the input stream. | | ` void` | ` https://developer.android.com/reference/java/io/InputStream#reset()() ` Repositions this stream to the position at the time the `mark` method was last called on this input stream. | | ` long` | ` https://developer.android.com/reference/java/io/InputStream#skip(long)(long n) ` Skips over and discards `n` bytes of data from this input stream. | | ` void` | ` https://developer.android.com/reference/java/io/InputStream#skipNBytes(long)(long n) ` Skips over and discards exactly `n` bytes of data from this input stream. | | ` long` | ` https://developer.android.com/reference/java/io/InputStream#transferTo(java.io.OutputStream)(https://developer.android.com/reference/java/io/OutputStream out) ` Reads all bytes from this input stream and writes the bytes to the given output stream in the order that they are read. | ||
| From class ` https://developer.android.com/reference/java/lang/Object ` |---|---| | ` https://developer.android.com/reference/java/lang/Object` | ` https://developer.android.com/reference/java/lang/Object#clone()() ` Creates and returns a copy of this object. | | ` boolean` | ` https://developer.android.com/reference/java/lang/Object#equals(java.lang.Object)(https://developer.android.com/reference/java/lang/Object obj) ` Indicates whether some other object is "equal to" this one. | | ` void` | ` https://developer.android.com/reference/java/lang/Object#finalize()() ` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. | | ` final https://developer.android.com/reference/java/lang/Class` | ` https://developer.android.com/reference/java/lang/Object#getClass()() ` Returns the runtime class of this `Object`. | | ` int` | ` https://developer.android.com/reference/java/lang/Object#hashCode()() ` Returns a hash code value for the object. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#notify()() ` Wakes up a single thread that is waiting on this object's monitor. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#notifyAll()() ` Wakes up all threads that are waiting on this object's monitor. | | ` https://developer.android.com/reference/java/lang/String` | ` https://developer.android.com/reference/java/lang/Object#toString()() ` Returns a string representation of the object. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#wait(long,%20int)(long timeoutMillis, int nanos) ` Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*, or until a certain amount of real time has elapsed. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#wait(long)(long timeoutMillis) ` Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*, or until a certain amount of real time has elapsed. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#wait()() ` Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*. | ||
| From interface ` https://developer.android.com/reference/java/io/Closeable ` |---|---| | ` abstract void` | ` https://developer.android.com/reference/java/io/Closeable#close()() ` Closes this stream and releases any system resources associated with it. | ||
| From interface ` https://developer.android.com/reference/java/lang/AutoCloseable ` |---|---| | ` abstract void` | ` https://developer.android.com/reference/java/lang/AutoCloseable#close()() ` Closes this resource, relinquishing any underlying resources. | ||
## Public methods
### available
Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public int available ()
```
Returns an estimate of the number of bytes that can be read (or skipped
over) from this input stream without blocking, which may be 0, or 0 when
end of stream is detected. The read might be on the same thread or
another thread. A single read or skip of this many bytes will not block,
but may read or skip fewer bytes.
Note that while some implementations of `InputStream` will
return the total number of bytes in the stream, many will not. It is
never correct to use the return value of this method to allocate
a buffer intended to hold all data in this stream.
A subclass's implementation of this method may choose to throw an
`https://developer.android.com/reference/java/io/IOException` if this input stream has been closed by invoking the
`https://developer.android.com/reference/java/io/InputStream#close()` method.
The `available` method of `InputStream` always returns
`0`.
This method should be overridden by subclasses.
| Returns ||
|---|---|
| `int` | an estimate of the number of bytes that can be read (or skipped over) from this input stream without blocking or `0` when it reaches the end of the input stream.
|
| Throws ||
|---|---|
| `https://developer.android.com/reference/java/io/IOException` | |
### close
Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public void close ()
```
Closes this input stream and releases any system resources associated
with the stream.
The `close` method of `InputStream` does
nothing.
| Throws ||
|---|---|
| `https://developer.android.com/reference/java/io/IOException` | |
### mark
Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public void mark (int readlimit)
```
Marks the current position in this input stream. A subsequent call to
the `reset` method repositions this stream at the last marked
position so that subsequent reads re-read the same bytes.
The `readlimit` arguments tells this input stream to
allow that many bytes to be read before the mark position gets
invalidated.
The general contract of `mark` is that, if the method
`markSupported` returns `true`, the stream somehow
remembers all the bytes read after the call to `mark` and
stands ready to supply those same bytes again if and whenever the method
`reset` is called. However, the stream is not required to
remember any data at all if more than `readlimit` bytes are
read from the stream before `reset` is called.
Marking a closed stream should not have any effect on the stream.
The `mark` method of `InputStream` does
nothing.
| Parameters ||
|---|---|
| `readlimit` | `int`: the maximum limit of bytes that can be read before the mark position becomes invalid.
|
### markSupported
Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public boolean markSupported ()
```
Tests if this input stream supports the `mark` and
`reset` methods. Whether or not `mark` and
`reset` are supported is an invariant property of a
particular input stream instance. The `markSupported` method
of `InputStream` returns `false`.
| Returns ||
|---|---|
| `boolean` | `true` if this stream instance supports the mark and reset methods; `false` otherwise.
|
### read
Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public int read ()
```
Reads the next byte of data from the input stream. The value byte is
returned as an `int` in the range `0` to
`255`. If no byte is available because the end of the stream
has been reached, the value `-1` is returned. This method
blocks until input data is available, the end of the stream is detected,
or an exception is thrown.
A subclass must provide an implementation of this method.
| Returns ||
|---|---|
| `int` | the next byte of data, or `-1` if the end of the stream is reached.
|
| Throws ||
|---|---|
| `https://developer.android.com/reference/java/io/IOException` | |
### read
Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public int read (byte[] b,
int off,
int len)
```
Reads up to `len` bytes of data from the input stream into
an array of bytes. An attempt is made to read as many as
`len` bytes, but a smaller number may be read.
The number of bytes actually read is returned as an integer.
This method blocks until input data is available, end of file is
detected, or an exception is thrown.
If `len` is zero, then no bytes are read and
`0` is returned; otherwise, there is an attempt to read at
least one byte. If no byte is available because the stream is at end of
file, the value `-1` is returned; otherwise, at least one
byte is read and stored into `b`.
The first byte read is stored into element `b[off]`, the
next one into `b[off+1]`, and so on. The number of bytes read
is, at most, equal to `len`. Let *k* be the number of
bytes actually read; these bytes will be stored in elements
`b[off]` through `b[off+`*k*`-1]`,
leaving elements `b[off+`*k*`]` through
`b[off+len-1]` unaffected.
In every case, elements `b[0]` through
`b[off-1]` and elements `b[off+len]` through
`b[b.length-1]` are unaffected.
The `read(b, off, len)` method
for class `InputStream` simply calls the method
`read()` repeatedly. If the first such call results in an
`IOException`, that exception is returned from the call to
the `read(b,` `off,` `len)` method. If
any subsequent call to `read()` results in a
`IOException`, the exception is caught and treated as if it
were end of file; the bytes read up to that point are stored into
`b` and the number of bytes read before the exception
occurred is returned. The default implementation of this method blocks
until the requested amount of input data `len` has been read,
end of file is detected, or an exception is thrown. Subclasses are
encouraged to provide a more efficient implementation of this method.
| Parameters ||
|---|---|
| `b` | `byte`: This value cannot be `null`.
|
| `off` | `int`: the start offset in array `b` at which the data is written.
|
| `len` | `int`: the maximum number of bytes to read.
|
| Returns ||
|---|---|
| `int` | the total number of bytes read into the buffer, or `-1` if there is no more data because the end of the stream has been reached.
|
| Throws ||
|---|---|
| `https://developer.android.com/reference/java/io/IOException` | |
### read
Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public int read (byte[] b)
```
Reads some number of bytes from the input stream and stores them into
the buffer array `b`. The number of bytes actually read is
returned as an integer. This method blocks until input data is
available, end of file is detected, or an exception is thrown.
If the length of `b` is zero, then no bytes are read and
`0` is returned; otherwise, there is an attempt to read at
least one byte. If no byte is available because the stream is at the
end of the file, the value `-1` is returned; otherwise, at
least one byte is read and stored into `b`.
The first byte read is stored into element `b[0]`, the
next one into `b[1]`, and so on. The number of bytes read is,
at most, equal to the length of `b`. Let *k* be the
number of bytes actually read; these bytes will be stored in elements
`b[0]` through `b[`*k*`-1]`,
leaving elements `b[`*k*`]` through
`b[b.length-1]` unaffected.
The `read(b)` method for class `InputStream`
has the same effect as:
read(b, 0, b.length)
| Parameters ||
|---|---|
| `b` | `byte`: This value cannot be `null`.
|
| Returns ||
|---|---|
| `int` | the total number of bytes read into the buffer, or `-1` if there is no more data because the end of the stream has been reached.
|
| Throws ||
|---|---|
| `https://developer.android.com/reference/java/io/IOException` | |
### reset
Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public void reset ()
```
Repositions this stream to the position at the time the
`mark` method was last called on this input stream.
The general contract of `reset` is:
- If the method `markSupported` returns `true`, then:
- If the method `mark` has not been called since the stream was created, or the number of bytes read from the stream since `mark` was last called is larger than the argument to `mark` at that last call, then an `IOException` might be thrown.
- If such an `IOException` is not thrown, then the stream is reset to a state such that all the bytes read since the most recent call to `mark` (or since the start of the file, if `mark` has not been called) will be resupplied to subsequent callers of the `read` method, followed by any bytes that otherwise would have been the next input data as of the time of the call to `reset`.
- If the method `markSupported` returns `false`, then:
- The call to `reset` may throw an `IOException`.
- If an `IOException` is not thrown, then the stream is reset to a fixed state that depends on the particular type of the input stream and how it was created. The bytes that will be supplied to subsequent callers of the `read` method depend on the particular type of the input stream.
The method `reset` for class `InputStream`
does nothing except throw an `IOException`.
| Throws ||
|---|---|
| `https://developer.android.com/reference/java/io/IOException` | |
### skip
Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public long skip (long n)
```
Skips over and discards `n` bytes of data from this input
stream. The `skip` method may, for a variety of reasons, end
up skipping over some smaller number of bytes, possibly `0`.
This may result from any of a number of conditions; reaching end of file
before `n` bytes have been skipped is only one possibility.
The actual number of bytes skipped is returned. If `n` is
negative, the `skip` method for class `InputStream` always
returns 0, and no bytes are skipped. Subclasses may handle the negative
value differently.
The `skip` method implementation of this class creates a
byte array and then repeatedly reads into it until `n` bytes
have been read or the end of the stream has been reached. Subclasses are
encouraged to provide a more efficient implementation of this method.
For instance, the implementation may depend on the ability to seek.
| Parameters ||
|---|---|
| `n` | `long`: the number of bytes to be skipped.
|
| Returns ||
|---|---|
| `long` | the actual number of bytes skipped which might be zero.
|
| Throws ||
|---|---|
| `https://developer.android.com/reference/java/io/IOException` | |