Util (ijkplayer-drm API)

java.lang.Object
- tv.danmaku.ijk.media.drm.util.Util

public final class Util
extends java.lang.Object

Miscellaneous utility methods.

字段概要

字段
限定符和类型	字段和说明
`static byte[]`	`EMPTY_BYTE_ARRAY` An empty byte array.
`static java.lang.String`	`MANUFACTURER` Like `Build.MANUFACTURER`, but in a place where it can be conveniently overridden for local testing.
`static java.lang.String`	`MODEL` Like `Build.MODEL`, but in a place where it can be conveniently overridden for local testing.
`static int`	`SDK_INT` Like `Build.VERSION#SDK_INT`, but in a place where it can be conveniently overridden for local testing.

方法概要

所有方法静态方法具体方法
限定符和类型	方法和说明
`static boolean`	`areEqual(java.lang.Object o1, java.lang.Object o2)` Tests two objects for `Object.equals(Object)` equality, handling the case where one or both may be null.
`static <T> T`	`castNonNull(T value)` Casts a nullable variable to a non-null variable without runtime null check.
`static void`	`closeQuietly(java.io.Closeable closeable)` Closes a `Closeable`, suppressing any `IOException` that may occur.
`static java.lang.String`	`fromUtf8Bytes(byte[] bytes)` Returns a new `String` constructed by decoding UTF-8 encoded bytes.
`static java.lang.String`	`fromUtf8Bytes(byte[] bytes, int offset, int length)` Returns a new `String` constructed by decoding UTF-8 encoded bytes in a subarray.
`static byte[]`	`getUtf8Bytes(java.lang.String value)` Returns a new byte array containing the code points of a `String` encoded using UTF-8.
`static boolean`	`isLinebreak(int c)` Returns whether the given character is a carriage return ('\r') or a line feed ('\n').
`static int`	`linearSearch(int[] array, int value)` Returns the index of the first occurrence of `value` in `array`, or `C.INDEX_UNSET` if `value` is not contained in `array`.
`static <T> T[]`	`nullSafeArrayConcatenation(T[] first, T[] second)` Creates a new array containing the concatenation of two non-null type arrays.
`static boolean`	`postOrRun(android.os.Handler handler, java.lang.Runnable runnable)` Posts the `Runnable` if the calling thread differs with the `Looper` of the `Handler`.
`static byte[]`	`toByteArray(java.io.InputStream inputStream)` Converts the entirety of an `InputStream` to a byte array.
`static long`	`toLong(int mostSignificantBits, int leastSignificantBits)` Return the long that is composed of the bits of the 2 specified integers.
`static java.lang.String`	`toLowerInvariant(java.lang.String text)` Converts text to lower case using `Locale.US`.
`static long`	`toUnsignedLong(int x)` Converts an integer to a long by unsigned conversion.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 字段详细资料
  - SDK_INT
```
public static final int SDK_INT
```
    Like Build.VERSION#SDK_INT, but in a place where it can be conveniently overridden for local testing.
  - MANUFACTURER
```
public static final java.lang.String MANUFACTURER
```
    Like Build.MANUFACTURER, but in a place where it can be conveniently overridden for local testing.
  - MODEL
```
public static final java.lang.String MODEL
```
    Like Build.MODEL, but in a place where it can be conveniently overridden for local testing.
  - EMPTY_BYTE_ARRAY
```
public static final byte[] EMPTY_BYTE_ARRAY
```
    An empty byte array.
- 方法详细资料
  - toByteArray
```
public static byte[] toByteArray(java.io.InputStream inputStream)
                          throws java.io.IOException
```
    Converts the entirety of an InputStream to a byte array.
    
    参数:
    
    inputStream - the InputStream to be read. The input stream is not closed by this method.
    
    返回:
    
    a byte array containing all of the inputStream's bytes.
    
    抛出:
    
    java.io.IOException - if an error occurs reading from the stream.
  - areEqual
```
public static boolean areEqual(java.lang.Object o1,
                               java.lang.Object o2)
```
    Tests two objects for Object.equals(Object) equality, handling the case where one or both may be null.
    
    参数:
    
    o1 - The first object.
    
    o2 - The second object.
    
    返回:
    
    o1 == null ? o2 == null : o1.equals(o2).
  - castNonNull
```
public static <T> T castNonNull(T value)
```
    Casts a nullable variable to a non-null variable without runtime null check.
    Use Assertions.checkNotNull(Object) to throw if the value is null.
  - nullSafeArrayConcatenation
```
public static <T> T[] nullSafeArrayConcatenation(T[] first,
                                                 T[] second)
```
    Creates a new array containing the concatenation of two non-null type arrays.
    
    参数:
    
    first - The first array.
    
    second - The second array.
    
    返回:
    
    The concatenated result.
  - postOrRun
```
public static boolean postOrRun(android.os.Handler handler,
                                java.lang.Runnable runnable)
```
    Posts the Runnable if the calling thread differs with the Looper of the Handler. Otherwise, runs the Runnable directly.
    
    参数:
    
    handler - The handler to which the Runnable will be posted.
    
    runnable - The runnable to either post or run.
    
    返回:
    
    true if the Runnable was successfully posted to the Handler or run. false otherwise.
  - closeQuietly
```
public static void closeQuietly(java.io.Closeable closeable)
```
    Closes a Closeable, suppressing any IOException that may occur. Both OutputStream and InputStream are Closeable.
    
    参数:
    
    closeable - The Closeable to close.
  - fromUtf8Bytes
```
public static java.lang.String fromUtf8Bytes(byte[] bytes)
```
    Returns a new String constructed by decoding UTF-8 encoded bytes.
    
    参数:
    
    bytes - The UTF-8 encoded bytes to decode.
    
    返回:
    
    The string.
  - fromUtf8Bytes
```
public static java.lang.String fromUtf8Bytes(byte[] bytes,
                                             int offset,
                                             int length)
```
    Returns a new String constructed by decoding UTF-8 encoded bytes in a subarray.
    
    参数:
    
    bytes - The UTF-8 encoded bytes to decode.
    
    offset - The index of the first byte to decode.
    
    length - The number of bytes to decode.
    
    返回:
    
    The string.
  - getUtf8Bytes
```
public static byte[] getUtf8Bytes(java.lang.String value)
```
    Returns a new byte array containing the code points of a String encoded using UTF-8.
    
    参数:
    
    value - The String whose bytes should be obtained.
    
    返回:
    
    The code points encoding using UTF-8.
  - isLinebreak
```
public static boolean isLinebreak(int c)
```
    Returns whether the given character is a carriage return ('\r') or a line feed ('\n').
    
    参数:
    
    c - The character.
    
    返回:
    
    Whether the given character is a linebreak.
  - linearSearch
```
public static int linearSearch(int[] array,
                               int value)
```
    Returns the index of the first occurrence of value in array, or C.INDEX_UNSET if value is not contained in array.
    
    参数:
    
    array - The array to search.
    
    value - The value to search for.
    
    返回:
    
    The index of the first occurrence of value in array, or C.INDEX_UNSET if value is not contained in array.
  - toLowerInvariant
```
public static java.lang.String toLowerInvariant(java.lang.String text)
```
    Converts text to lower case using Locale.US.
    
    参数:
    
    text - The text to convert.
    
    返回:
    
    The lower case text, or null if text is null.
  - toUnsignedLong
```
public static long toUnsignedLong(int x)
```
    Converts an integer to a long by unsigned conversion.
    This method is equivalent to Integer.toUnsignedLong(int) for API 26+.
  - toLong
```
public static long toLong(int mostSignificantBits,
                          int leastSignificantBits)
```
    Return the long that is composed of the bits of the 2 specified integers.
    
    参数:
    
    mostSignificantBits - The 32 most significant bits of the long to return.
    
    leastSignificantBits - The 32 least significant bits of the long to return.
    
    返回:
    
    a long where its 32 most significant bits are mostSignificantBits bits and its 32 least significant bits are leastSignificantBits.

类 Util

字段概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

SDK_INT

MANUFACTURER

MODEL

EMPTY_BYTE_ARRAY

方法详细资料

toByteArray

areEqual

castNonNull

nullSafeArrayConcatenation

postOrRun

closeQuietly

fromUtf8Bytes

fromUtf8Bytes

getUtf8Bytes

isLinebreak

linearSearch

toLowerInvariant

toUnsignedLong

toLong