72 lines
2.6 KiB
Java
72 lines
2.6 KiB
Java
package org.jivesoftware.smacks.messenger.android;
|
|
|
|
import java.util.ArrayList;
|
|
import java.util.List;
|
|
import java.util.concurrent.atomic.AtomicBoolean;
|
|
import java.util.concurrent.atomic.AtomicInteger;
|
|
|
|
import org.jivesoftware.smacks.messenger.android.csi.util.AbstractActivityLifecycleCallbacks;
|
|
import org.jivesoftware.smackx.messenger.csi.ClientStateListener;
|
|
|
|
import android.app.Activity;
|
|
import android.app.Application;
|
|
|
|
/**
|
|
* Android Utility class that observes the current state of the application.
|
|
* If the application currently displays at least one active Activity, then registered
|
|
* {@link ClientStateListener ClientStateListeners} will be notified via {@link ClientStateListener#onClientInForeground()}.
|
|
* If the application goes into the background, {@link ClientStateListener#onClientInBackground()} will be fired.
|
|
*
|
|
* Setup: During application startup, call {@link android.app.Application#registerActivityLifecycleCallbacks(Application.ActivityLifecycleCallbacks)}
|
|
* and pass an instance of {@link AndroidCsiManager} as argument.
|
|
*
|
|
* Remember to also register a {@link ClientStateListener} implementation (eg. the Messenger class from smack-messenger).
|
|
*/
|
|
public final class AndroidCsiManager extends AbstractActivityLifecycleCallbacks {
|
|
|
|
private static AndroidCsiManager INSTANCE;
|
|
|
|
private AtomicInteger activityReferences = new AtomicInteger(0);
|
|
private AtomicBoolean isActivityChangingConfiguration = new AtomicBoolean(false);
|
|
|
|
private final List<ClientStateListener> listeners = new ArrayList<>();
|
|
|
|
private AndroidCsiManager() {
|
|
|
|
}
|
|
|
|
public AndroidCsiManager getInstance() {
|
|
if (INSTANCE == null) {
|
|
INSTANCE = new AndroidCsiManager();
|
|
}
|
|
return INSTANCE;
|
|
}
|
|
|
|
@Override
|
|
public void onActivityStarted(Activity activity) {
|
|
if (activityReferences.incrementAndGet() == 1 && !isActivityChangingConfiguration.get()) {
|
|
for (ClientStateListener listener : listeners) {
|
|
listener.onClientInForeground();
|
|
}
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public void onActivityStopped(Activity activity) {
|
|
isActivityChangingConfiguration.set(activity.isChangingConfigurations());
|
|
if (activityReferences.decrementAndGet() == 0 && !isActivityChangingConfiguration.get()) {
|
|
for (ClientStateListener listener : listeners) {
|
|
listener.onClientInBackground();
|
|
}
|
|
}
|
|
}
|
|
|
|
public void addClientStateListener(ClientStateListener listener) {
|
|
this.listeners.add(listener);
|
|
}
|
|
|
|
public void removeClientStateListener(ClientStateListener listener) {
|
|
this.listeners.remove(listener);
|
|
}
|
|
}
|