Added in [API level 3](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Summary: [Ctors](https://developer.android.com/reference/android/content/res/AssetFileDescriptor.AutoCloseInputStream#pubctors) \| [Methods](https://developer.android.com/reference/android/content/res/AssetFileDescriptor.AutoCloseInputStream#pubmethods) \| [Inherited Methods](https://developer.android.com/reference/android/content/res/AssetFileDescriptor.AutoCloseInputStream#inhmethods)
# AssetFileDescriptor.AutoCloseInputStream
*** ** * ** ***
` public static class AssetFileDescriptor.AutoCloseInputStream `
` ` ` ` ` ` ` extends https://developer.android.com/reference/android/os/ParcelFileDescriptor.AutoCloseInputStream ` ` `
|---|---|---|---|---|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) |||||
| ↳ | [java.io.InputStream](https://developer.android.com/reference/java/io/InputStream) ||||
| | ↳ | [java.io.FileInputStream](https://developer.android.com/reference/java/io/FileInputStream) |||
| | | ↳ | [android.os.ParcelFileDescriptor.AutoCloseInputStream](https://developer.android.com/reference/android/os/ParcelFileDescriptor.AutoCloseInputStream) ||
| | | | ↳ | android.content.res.AssetFileDescriptor.AutoCloseInputStream |
*** ** * ** ***
An InputStream you can create on a ParcelFileDescriptor, which will take care of calling `https://developer.android.com/reference/android/os/ParcelFileDescriptor#close()` for you when the stream is closed. It has a ParcelFileDescriptor.AutoCloseInputStream member to make delegate calls and during definition it will create seekable or non seekable child object AssetFileDescriptor.AutoCloseInputStream depends on the type of file descriptor to provide different solution.
## Summary
| ### Public constructors ||
|---|---|
| ` https://developer.android.com/reference/android/content/res/AssetFileDescriptor.AutoCloseInputStream#AutoCloseInputStream(android.content.res.AssetFileDescriptor)(https://developer.android.com/reference/android/content/res/AssetFileDescriptor fd) ` |
| ### Public methods ||
|---|---|
| ` int` | ` https://developer.android.com/reference/android/content/res/AssetFileDescriptor.AutoCloseInputStream#available()() ` Returns an estimate of the number of remaining bytes that can be read (or skipped over) from this input stream without blocking by the next invocation of a method for this input stream. |
| ` void` | ` https://developer.android.com/reference/android/content/res/AssetFileDescriptor.AutoCloseInputStream#close()() ` Closes this file input stream and releases any system resources associated with the stream. |
| ` https://developer.android.com/reference/java/nio/channels/FileChannel` | ` https://developer.android.com/reference/android/content/res/AssetFileDescriptor.AutoCloseInputStream#getChannel()() ` Returns the unique `https://developer.android.com/reference/java/nio/channels/FileChannel` object associated with this file input stream. |
| ` void` | ` https://developer.android.com/reference/android/content/res/AssetFileDescriptor.AutoCloseInputStream#mark(int)(int readlimit) ` Marks the current position in this input stream. |
| ` boolean` | ` https://developer.android.com/reference/android/content/res/AssetFileDescriptor.AutoCloseInputStream#markSupported()() ` Tests if this input stream supports the `mark` and `reset` methods. |
| ` int` | ` https://developer.android.com/reference/android/content/res/AssetFileDescriptor.AutoCloseInputStream#read()() ` Reads a byte of data from this input stream. |
| ` int` | ` https://developer.android.com/reference/android/content/res/AssetFileDescriptor.AutoCloseInputStream#read(byte[],%20int,%20int)(byte[] buffer, int offset, int count) ` Reads up to `len` bytes of data from this input stream into an array of bytes. |
| ` int` | ` https://developer.android.com/reference/android/content/res/AssetFileDescriptor.AutoCloseInputStream#read(byte[])(byte[] buffer) ` Reads up to `b.length` bytes of data from this input stream into an array of bytes. |
| ` void` | ` https://developer.android.com/reference/android/content/res/AssetFileDescriptor.AutoCloseInputStream#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/AssetFileDescriptor.AutoCloseInputStream#skip(long)(long count) ` Skips over and discards `n` bytes of data from the input stream. |
### Inherited methods
From class ` https://developer.android.com/reference/android/os/ParcelFileDescriptor.AutoCloseInputStream ` ` void` ` https://developer.android.com/reference/android/os/ParcelFileDescriptor.AutoCloseInputStream#close()() `
Closes this file input stream and releases any system resources associated with the stream.
` int` ` https://developer.android.com/reference/android/os/ParcelFileDescriptor.AutoCloseInputStream#read()() `
Reads a byte of data from this input stream.
` int` ` https://developer.android.com/reference/android/os/ParcelFileDescriptor.AutoCloseInputStream#read(byte[],%20int,%20int)(byte[] b, int off, int len) `
Reads up to `len` bytes of data from this input stream into an array of bytes.
` int` ` https://developer.android.com/reference/android/os/ParcelFileDescriptor.AutoCloseInputStream#read(byte[])(byte[] b) `
Reads up to `b.length` bytes of data from this input stream into an array of bytes.
From class ` https://developer.android.com/reference/java/io/FileInputStream ` ` int` ` https://developer.android.com/reference/java/io/FileInputStream#available()() `
Returns an estimate of the number of remaining bytes that can be read (or skipped over) from this input stream without blocking by the next invocation of a method for this input stream.
` void` ` https://developer.android.com/reference/java/io/FileInputStream#close()() `
Closes this file input stream and releases any system resources associated with the stream.
` void` ` https://developer.android.com/reference/java/io/FileInputStream#finalize()() `
Ensures that the `close` method of this file input stream is called when there are no more references to it.
` https://developer.android.com/reference/java/nio/channels/FileChannel` ` https://developer.android.com/reference/java/io/FileInputStream#getChannel()() `
Returns the unique `https://developer.android.com/reference/java/nio/channels/FileChannel` object associated with this file input stream.
` final https://developer.android.com/reference/java/io/FileDescriptor` ` https://developer.android.com/reference/java/io/FileInputStream#getFD()() `
Returns the `FileDescriptor` object that represents the connection to the actual file in the file system being used by this `FileInputStream`.
` int` ` https://developer.android.com/reference/java/io/FileInputStream#read()() `
Reads a byte of data from this input stream.
` int` ` https://developer.android.com/reference/java/io/FileInputStream#read(byte[],%20int,%20int)(byte[] b, int off, int len) `
Reads up to `len` bytes of data from this input stream into an array of bytes.
` int` ` https://developer.android.com/reference/java/io/FileInputStream#read(byte[])(byte[] b) `
Reads up to `b.length` bytes of data from this input stream into an array of bytes.
` long` ` https://developer.android.com/reference/java/io/FileInputStream#skip(long)(long n) `
Skips over and discards `n` bytes of data from the input stream.
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 constructors
### AutoCloseInputStream
Added in [API level 3](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public AutoCloseInputStream (AssetFileDescriptor fd)
```
| Parameters ||
|---|---|
| `fd` | `AssetFileDescriptor`
|
| Throws ||
|---|---|
| `https://developer.android.com/reference/java/io/IOException` | |
## Public methods
### available
Added in [API level 3](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public int available ()
```
Returns an estimate of the number of remaining bytes that can be read (or skipped over) from this input stream without blocking by the next invocation of a method for this input stream. Returns 0 when the file position is beyond EOF. The next invocation might be 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.
In some cases, a non-blocking read (or skip) may appear to be blocked when it is merely slow, for example when reading large files over slow networks.
| Returns ||
|---|---|
| `int` | an estimate of the number of remaining bytes that can be read (or skipped over) from this input stream without blocking.
|
| Throws ||
|---|---|
| `https://developer.android.com/reference/java/io/IOException` | |
### close
Added in [API level 3](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public void close ()
```
Closes this file input stream and releases any system resources associated with the stream.
If this stream has an associated channel then the channel is closed as well.
| Throws ||
|---|---|
| `https://developer.android.com/reference/java/io/IOException` | |
### getChannel
Added in [API level 3](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public FileChannel getChannel ()
```
Returns the unique `https://developer.android.com/reference/java/nio/channels/FileChannel` object associated with this file input stream.
The initial `https://developer.android.com/reference/java/nio/channels/FileChannel#position()` of the returned channel will be equal to the number of bytes read from the file so far. Reading bytes from this stream will increment the channel's position. Changing the channel's position, either explicitly or by reading, will change this stream's file position.
| Returns ||
|---|---|
| `https://developer.android.com/reference/java/nio/channels/FileChannel` | the file channel associated with this file input stream
|
### mark
Added in [API level 3](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 3](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 3](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public int read ()
```
Reads a byte of data from this input stream. This method blocks if no input is yet available.
| Returns ||
|---|---|
| `int` | the next byte of data, or `-1` if the end of the file is reached.
|
| Throws ||
|---|---|
| `https://developer.android.com/reference/java/io/IOException` | |
### read
Added in [API level 3](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public int read (byte[] buffer,
int offset,
int count)
```
Reads up to `len` bytes of data from this input stream into an array of bytes. If `len` is not zero, the method blocks until some input is available; otherwise, no bytes are read and `0` is returned.
| Parameters ||
|---|---|
| `buffer` | `byte`: the buffer into which the data is read.
|
| `offset` | `int`: the start offset in the destination array `b`
|
| `count` | `int`: the maximum number of bytes 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 file has been reached.
|
| Throws ||
|---|---|
| `https://developer.android.com/reference/java/io/IOException` | |
### read
Added in [API level 3](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public int read (byte[] buffer)
```
Reads up to `b.length` bytes of data from this input stream into an array of bytes. This method blocks until some input is available.
| Parameters ||
|---|---|
| `buffer` | `byte`: the buffer into which the data is 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 file has been reached.
|
| Throws ||
|---|---|
| `https://developer.android.com/reference/java/io/IOException` | |
### reset
Added in [API level 3](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 3](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public long skip (long count)
```
Skips over and discards `n` bytes of data from the input stream.
The `skip` method may, for a variety of reasons, end up skipping over some smaller number of bytes, possibly `0`. If `n` is negative, the method will try to skip backwards. In case the backing file does not support backward skip at its current position, an `IOException` is thrown. The actual number of bytes skipped is returned. If it skips forwards, it returns a positive value. If it skips backwards, it returns a negative value.
This method may skip more bytes than what are remaining in the backing file. This produces no exception and the number of bytes skipped may include some number of bytes that were beyond the EOF of the backing file. Attempting to read from the stream after skipping past the end will result in -1 indicating the end of the file.
| Parameters ||
|---|---|
| `count` | `long`: the number of bytes to be skipped.
|
| Returns ||
|---|---|
| `long` | the actual number of bytes skipped.
|
| Throws ||
|---|---|
| `https://developer.android.com/reference/java/io/IOException` | |