Merge "Share one receiver for CurrentUserTracker" am: 06d619ccfa am: a84c7ea396 am: 61e2ff5727
am: a1f9cd0ee6
Change-Id: Iffd6e087582c730323c7d9250cd3d5abba92015a
diff --git a/packages/SystemUI/src/com/android/systemui/settings/CurrentUserTracker.java b/packages/SystemUI/src/com/android/systemui/settings/CurrentUserTracker.java
index dd80750..005206f 100644
--- a/packages/SystemUI/src/com/android/systemui/settings/CurrentUserTracker.java
+++ b/packages/SystemUI/src/com/android/systemui/settings/CurrentUserTracker.java
@@ -22,39 +22,93 @@
import android.content.Intent;
import android.content.IntentFilter;
-public abstract class CurrentUserTracker extends BroadcastReceiver {
+import java.util.ArrayList;
+import java.util.List;
+import java.util.function.Consumer;
- private Context mContext;
- private int mCurrentUserId;
+public abstract class CurrentUserTracker {
+ private final UserReceiver mUserReceiver;
+
+ private Consumer<Integer> mCallback = this::onUserSwitched;
public CurrentUserTracker(Context context) {
- mContext = context;
+ mUserReceiver = UserReceiver.getInstance(context);
}
public int getCurrentUserId() {
- return mCurrentUserId;
- }
-
- @Override
- public void onReceive(Context context, Intent intent) {
- if (Intent.ACTION_USER_SWITCHED.equals(intent.getAction())) {
- int oldUserId = mCurrentUserId;
- mCurrentUserId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, 0);
- if (oldUserId != mCurrentUserId) {
- onUserSwitched(mCurrentUserId);
- }
- }
+ return mUserReceiver.getCurrentUserId();
}
public void startTracking() {
- mCurrentUserId = ActivityManager.getCurrentUser();
- IntentFilter filter = new IntentFilter(Intent.ACTION_USER_SWITCHED);
- mContext.registerReceiver(this, filter);
+ mUserReceiver.addTracker(mCallback);
}
public void stopTracking() {
- mContext.unregisterReceiver(this);
+ mUserReceiver.removeTracker(mCallback);
}
public abstract void onUserSwitched(int newUserId);
+
+ private static class UserReceiver extends BroadcastReceiver {
+ private static UserReceiver sInstance;
+
+ private Context mAppContext;
+ private boolean mReceiverRegistered;
+ private int mCurrentUserId;
+
+ private List<Consumer<Integer>> mCallbacks = new ArrayList<>();
+
+ private UserReceiver(Context context) {
+ mAppContext = context.getApplicationContext();
+ }
+
+ static UserReceiver getInstance(Context context) {
+ if (sInstance == null) {
+ sInstance = new UserReceiver(context);
+ }
+ return sInstance;
+ }
+
+ @Override
+ public void onReceive(Context context, Intent intent) {
+ if (Intent.ACTION_USER_SWITCHED.equals(intent.getAction())) {
+ notifyUserSwitched(intent.getIntExtra(Intent.EXTRA_USER_HANDLE, 0));
+ }
+ }
+
+ public int getCurrentUserId() {
+ return mCurrentUserId;
+ }
+
+ private void addTracker(Consumer<Integer> callback) {
+ if (!mCallbacks.contains(callback)) {
+ mCallbacks.add(callback);
+ }
+ if (!mReceiverRegistered) {
+ mCurrentUserId = ActivityManager.getCurrentUser();
+ IntentFilter filter = new IntentFilter(Intent.ACTION_USER_SWITCHED);
+ mAppContext.registerReceiver(this, filter);
+ mReceiverRegistered = true;
+ }
+ }
+
+ private void removeTracker(Consumer<Integer> callback) {
+ if (mCallbacks.contains(callback)) {
+ mCallbacks.remove(callback);
+ if (mCallbacks.size() == 0 && mReceiverRegistered) {
+ mAppContext.unregisterReceiver(this);
+ mReceiverRegistered = false;
+ }
+ }
+ }
+
+ private void notifyUserSwitched(int newUserId) {
+ if (mCurrentUserId != newUserId) {
+ mCurrentUserId = newUserId;
+ for (Consumer<Integer> consumer : mCallbacks) {
+ consumer.accept(newUserId);
+ }
+ }
+ }
+ }
}