Most visited

Recently visited

Results for

Summary: Ctors | Methods | Protected Methods | Inherited Methods

DexFile

public final class DexFile
extends Object

java.lang.Object
↳	dalvik.system.DexFile

This class is deprecated.
This class should not be used directly by applications. It will hurt performance in most cases and will lead to incorrect execution of bytecode in the worst case. Applications should use one of the standard classloaders such as PathClassLoader instead. This API will be removed in a future Android release.

Loads DEX files. This class is meant for internal use and should not be used by applications.

Summary

Public constructors
`DexFile(File file)` This constructor is deprecated. Applications should use one of the standard classloaders such as `PathClassLoader` instead. This API will be removed in a future Android release.
`DexFile(String fileName)` This constructor is deprecated. Applications should use one of the standard classloaders such as `PathClassLoader` instead. This API will be removed in a future Android release.

Public methods
`void`	`close()` Closes the DEX file.
`Enumeration<String>`	`entries()` Enumerate the names of the classes in this DEX file.
`String`	`getName()` Gets the name of the (already opened) DEX file.
`static boolean`	`isDexOptNeeded(String fileName)` Returns true if the VM believes that the apk/jar file is out of date and should be passed through "dexopt" again.
`Class`	`loadClass(String name, ClassLoader loader)` Loads a class.
`static DexFile`	`loadDex(String sourcePathName, String outputPathName, int flags)` This method is deprecated. Applications should use one of the standard classloaders such as `PathClassLoader` instead. This API will be removed in a future Android release.
`String`	`toString()` Returns a string representation of the object.

Protected methods
`void`	`finalize()` Called when the class is finalized.

Inherited methods

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void`	`wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void`	`wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

Public constructors

DexFile

public DexFile (File file)

This constructor is deprecated.
Applications should use one of the standard classloaders such as PathClassLoader instead. This API will be removed in a future Android release.

Opens a DEX file from a given File object.

Parameters
`file`	`File`

Throws
`IOException`

DexFile

public DexFile (String fileName)

This constructor is deprecated.
Applications should use one of the standard classloaders such as PathClassLoader instead. This API will be removed in a future Android release.

Opens a DEX file from a given filename.

Parameters
`fileName`	`String`

Throws
`IOException`

Public methods

close

public void close ()

Closes the DEX file.

This may not be able to release all of the resources. If classes from this DEX file are still resident, the DEX file can't be unmapped. In the case where we do not release all the resources, close is called again in the finalizer.

Throws
`IOException`	if an I/O error occurs during closing the file, which normally should not happen

entries

public Enumeration<String> entries ()

Enumerate the names of the classes in this DEX file.

Returns
`Enumeration<String>`	an enumeration of names of classes contained in the DEX file, in the usual internal form (like "java/lang/String").

getName

public String getName ()

Gets the name of the (already opened) DEX file.

Returns
`String`	the file name

isDexOptNeeded

public static boolean isDexOptNeeded (String fileName)

Returns true if the VM believes that the apk/jar file is out of date and should be passed through "dexopt" again.

Parameters
`fileName`	`String`: the absolute path to the apk/jar file to examine.

Returns
`boolean`	true if dexopt should be called on the file, false otherwise.

Throws
`FileNotFoundException`	if fileName is not readable, not a file, or not present.
`IOException`	if fileName is not a valid apk/jar file or if problems occur while parsing it.
`NullPointerException`	if fileName is null.

loadClass

public Class loadClass (String name, 
                ClassLoader loader)

Loads a class. Returns the class on success, or a null reference on failure.

If you are not calling this from a class loader, this is most likely not going to do what you want. Use Class#forName(String) instead.

The method does not throw ClassNotFoundException if the class isn't found because it isn't reasonable to throw exceptions wildly every time a class is not found in the first DEX file we look at.

Parameters
`name`	`String`: the class name, which should look like "java/lang/String"
`loader`	`ClassLoader`: the class loader that tries to load the class (in most cases the caller of the method

Returns
`Class`	the `Class` object representing the class, or `null` if the class cannot be loaded

loadDex

public static DexFile loadDex (String sourcePathName, 
                String outputPathName, 
                int flags)

This method is deprecated.
Applications should use one of the standard classloaders such as PathClassLoader instead. This API will be removed in a future Android release.

Open a DEX file, specifying the file in which the optimized DEX data should be written. If the optimized form exists and appears to be current, it will be used; if not, the VM will attempt to regenerate it.

Parameters
`sourcePathName`	`String`
`outputPathName`	`String`
`flags`	`int`

Returns
`DexFile`

Throws
`IOException`

toString

public String toString ()

Returns a string representation of the object. In general, the toString method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.

The toString method for class Object returns a string consisting of the name of the class of which the object is an instance, the at-sign character `@', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of:

 getClass().getName() + '@' + Integer.toHexString(hashCode())

Returns
`String`	a string representation of the object.

Protected methods

finalize

protected void finalize ()

Called when the class is finalized. Makes sure the DEX file is closed.

Throws
`IOException`	if an I/O error occurs during closing the file, which normally should not happen
`Throwable`