AppCompatActivityͰLifecycleΛࢼ͍ͨ͠ਓࣗલͰ public class LifecycleCompatActivity extends AppCompatActivity implements LifecycleRegistryOwner { private final LifecycleRegistry mRegistry = new LifecycleRegistry(this); @Override public LifecycleRegistry getLifecycle() { return mRegistry; } }
LifecycleΫϥε public abstract class Lifecycle { public abstract void addObserver(LifecycleObserver observer); public abstract void removeObserver(LifecycleObserver observer); public abstract State getCurrentState(); public enum Event { ON_CREATE, ON_START, ...ON_ANY } public enum State { DESTROYED, INITIALIZED, CREATED, STARTED, RESUMED; public boolean isAtLeast(State state) { return compareTo(state) >= 0; } } }
LifecycleΫϥε public abstract class Lifecycle { public abstract void addObserver(LifecycleObserver observer); public abstract void removeObserver(LifecycleObserver observer); public abstract State getCurrentState(); public enum Event { ON_CREATE, ON_START, ...ON_ANY } public enum State { DESTROYED, INITIALIZED, CREATED, STARTED, RESUMED; public boolean isAtLeast(State state) { return compareTo(state) >= 0; } } }
https://developer.android.com/topic/libraries/architecture/lifecycle.html class MyLocationListener implements LifecycleObserver { public void enable() { enabled = true; if (lifecycle.getState().isAtLeast(STARTED)) { // connect if not connected } }