RecoverySystem
public
class
RecoverySystem
extends Object
RecoverySystem contains methods for interacting with the Android
recovery system (the separate partition that can be used to install
system updates, wipe user data, etc.)
Summary
Nested classes |
|---|
interface |
RecoverySystem.ProgressListener
Interface definition for a callback to be invoked regularly as
verification proceeds.
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Inherited methods |
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 From
class
java.lang.Object
Object
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clone()
Creates and returns a copy of this object.
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boolean
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equals(Object obj)
Indicates whether some other object is "equal to" this one.
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void
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finalize()
Called by the garbage collector on an object when garbage collection
determines that there are no more references to the object.
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final
Class<?>
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getClass()
Returns the runtime class of this Object.
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int
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hashCode()
Returns a hash code value for the object.
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final
void
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notify()
Wakes up a single thread that is waiting on this object's
monitor.
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final
void
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notifyAll()
Wakes up all threads that are waiting on this object's monitor.
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String
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toString()
Returns a string representation of the object.
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final
void
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wait(long millis, 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.
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final
void
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wait(long millis)
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.
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final
void
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wait()
Causes the current thread to wait until another thread invokes the
notify() method or the
notifyAll() method for this object.
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Public methods
installPackage
void installPackage (Context context,
File packageFile)
Reboots the device in order to install the given update
package.
Requires the REBOOT permission.
| Parameters |
|---|
context |
Context:
the Context to use |
packageFile |
File:
the update package to install. Must be on
a partition mountable by recovery. (The set of partitions
known to recovery may vary from device to device. Generally,
/cache and /data are safe.) |
| Throws |
|---|
IOException |
if writing the recovery command file
fails, or if the reboot itself fails.
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rebootWipeCache
void rebootWipeCache (Context context)
Reboot into the recovery system to wipe the /cache partition.
| Parameters |
|---|
context |
Context
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rebootWipeUserData
void rebootWipeUserData (Context context)
Reboots the device and wipes the user data and cache
partitions. This is sometimes called a "factory reset", which
is something of a misnomer because the system partition is not
restored to its factory state. Requires the
REBOOT permission.
| Parameters |
|---|
context |
Context:
the Context to use |
| Throws |
|---|
IOException |
if writing the recovery command file
fails, or if the reboot itself fails. |
SecurityException |
if the current user is not allowed to wipe data.
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verifyPackage
void verifyPackage (File packageFile,
RecoverySystem.ProgressListener listener,
File deviceCertsZipFile)
Verify the cryptographic signature of a system update package
before installing it. Note that the package is also verified
separately by the installer once the device is rebooted into
the recovery system. This function will return only if the
package was successfully verified; otherwise it will throw an
exception.
Verification of a package can take significant time, so this
function should not be called from a UI thread. Interrupting
the thread while this function is in progress will result in a
SecurityException being thrown (and the thread's interrupt flag
will be cleared).
| Parameters |
|---|
packageFile |
File:
the package to be verified |
listener |
RecoverySystem.ProgressListener:
an object to receive periodic progress
updates as verification proceeds. May be null. |
deviceCertsZipFile |
File:
the zip file of certificates whose
public keys we will accept. Verification succeeds if the
package is signed by the private key corresponding to any
public key in this file. May be null to use the system default
file (currently "/system/etc/security/otacerts.zip"). |
Developers