Acquires the lock only if it is free at the time of invocation.

Acquires the lock if it is available and returns immediately with the value true. If the lock is not available then this method will return immediately with the value false.

A typical usage idiom for this method would be:

Lock lock = ...;
 if (lock.tryLock()) {
   try {
     // manipulate protected state
    finally {
     lock.unlock();
   }
 } else {
   // perform alternative actions
 }}

[Android Documentation]