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.

Field Summary

Fields
Modifier and Type	Field and Description
`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.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`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.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - 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.
- Method Detail
  - toByteArray
```
public static byte[] toByteArray(java.io.InputStream inputStream)
                          throws java.io.IOException
```
    Converts the entirety of an InputStream to a byte array.
    
    Parameters:
    
    inputStream - the InputStream to be read. The input stream is not closed by this method.
    
    Returns:
    
    a byte array containing all of the inputStream's bytes.
    
    Throws:
    
    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.
    
    Parameters:
    
    o1 - The first object.
    
    o2 - The second object.
    
    Returns:
    
    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.
    
    Parameters:
    
    first - The first array.
    
    second - The second array.
    
    Returns:
    
    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.
    
    Parameters:
    
    handler - The handler to which the Runnable will be posted.
    
    runnable - The runnable to either post or run.
    
    Returns:
    
    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.
    
    Parameters:
    
    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.
    
    Parameters:
    
    bytes - The UTF-8 encoded bytes to decode.
    
    Returns:
    
    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.
    
    Parameters:
    
    bytes - The UTF-8 encoded bytes to decode.
    
    offset - The index of the first byte to decode.
    
    length - The number of bytes to decode.
    
    Returns:
    
    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.
    
    Parameters:
    
    value - The String whose bytes should be obtained.
    
    Returns:
    
    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').
    
    Parameters:
    
    c - The character.
    
    Returns:
    
    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.
    
    Parameters:
    
    array - The array to search.
    
    value - The value to search for.
    
    Returns:
    
    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.
    
    Parameters:
    
    text - The text to convert.
    
    Returns:
    
    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.
    
    Parameters:
    
    mostSignificantBits - The 32 most significant bits of the long to return.
    
    leastSignificantBits - The 32 least significant bits of the long to return.
    
    Returns:
    
    a long where its 32 most significant bits are mostSignificantBits bits and its 32 least significant bits are leastSignificantBits.

Class Util

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

SDK_INT

MANUFACTURER

MODEL

EMPTY_BYTE_ARRAY

Method Detail

toByteArray

areEqual

castNonNull

nullSafeArrayConcatenation

postOrRun

closeQuietly

fromUtf8Bytes

fromUtf8Bytes

getUtf8Bytes

isLinebreak

linearSearch

toLowerInvariant

toUnsignedLong

toLong