am e5a6f821: Merge "Don\'t register more receivers and observers for every... (61effdd2) · Commits · e / os / android_frameworks_base

core/java/android/widget/DateTimeView.java

+85 −41

Original line number	Diff line number	Diff line
		@@ -32,6 +32,7 @@ import android.widget.RemoteViews.RemoteView;

		import java.text.DateFormat;
		import java.text.SimpleDateFormat;
		import java.util.ArrayList;
		import java.util.Date;

		//
		@@ -62,8 +63,8 @@ public class DateTimeView extends TextView {
		int mLastDisplay = -1;
		DateFormat mLastFormat;

		private boolean mAttachedToWindow;
		private long mUpdateTimeMillis;
		private static final ThreadLocal<ReceiverInfo> sReceiverInfo = new ThreadLocal<ReceiverInfo>();

		public DateTimeView(Context context) {
		super(context);
		@@ -76,15 +77,21 @@ public class DateTimeView extends TextView {
		@Override
		protected void onAttachedToWindow() {
		super.onAttachedToWindow();
		registerReceivers();
		mAttachedToWindow = true;
		ReceiverInfo ri = sReceiverInfo.get();
		if (ri == null) {
		ri = new ReceiverInfo();
		sReceiverInfo.set(ri);
		}
		ri.addView(this);
		}

		@Override
		protected void onDetachedFromWindow() {
		super.onDetachedFromWindow();
		unregisterReceivers();
		mAttachedToWindow = false;
		final ReceiverInfo ri = sReceiverInfo.get();
		if (ri != null) {
		ri.removeView(this);
		}
		}

		@android.view.RemotableViewMethod
		@@ -204,32 +211,19 @@ public class DateTimeView extends TextView {
		}
		}

		private void registerReceivers() {
		Context context = getContext();

		IntentFilter filter = new IntentFilter();
		filter.addAction(Intent.ACTION_TIME_TICK);
		filter.addAction(Intent.ACTION_TIME_CHANGED);
		filter.addAction(Intent.ACTION_CONFIGURATION_CHANGED);
		filter.addAction(Intent.ACTION_TIMEZONE_CHANGED);
		context.registerReceiver(mBroadcastReceiver, filter);

		Uri uri = Settings.System.getUriFor(Settings.System.DATE_FORMAT);
		context.getContentResolver().registerContentObserver(uri, true, mContentObserver);
		}

		private void unregisterReceivers() {
		Context context = getContext();
		context.unregisterReceiver(mBroadcastReceiver);
		context.getContentResolver().unregisterContentObserver(mContentObserver);
		void clearFormatAndUpdate() {
		mLastFormat = null;
		update();
		}

		private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
		private static class ReceiverInfo {
		private final ArrayList<DateTimeView> mAttachedViews = new ArrayList<DateTimeView>();
		private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
		@Override
		public void onReceive(Context context, Intent intent) {
		String action = intent.getAction();
		if (Intent.ACTION_TIME_TICK.equals(action)) {
		if (System.currentTimeMillis() < mUpdateTimeMillis) {
		if (System.currentTimeMillis() < getSoonestUpdateTime()) {
		// The update() function takes a few milliseconds to run because of
		// all of the time conversions it needs to do, so we can't do that
		// every minute.
		@@ -237,16 +231,66 @@ public class DateTimeView extends TextView {
		}
		}
		// ACTION_TIME_CHANGED can also signal a change of 12/24 hr. format.
		mLastFormat = null;
		update();
		updateAll();
		}
		};

		private ContentObserver mContentObserver = new ContentObserver(new Handler()) {
		private final ContentObserver mObserver = new ContentObserver(new Handler()) {
		@Override
		public void onChange(boolean selfChange) {
		mLastFormat = null;
		update();
		updateAll();
		}
		};

		public void addView(DateTimeView v) {
		final boolean register = mAttachedViews.isEmpty();
		mAttachedViews.add(v);
		if (register) {
		register(v.getContext().getApplicationContext());
		}
		}

		public void removeView(DateTimeView v) {
		mAttachedViews.remove(v);
		if (mAttachedViews.isEmpty()) {
		unregister(v.getContext().getApplicationContext());
		}
		}

		void updateAll() {
		final int count = mAttachedViews.size();
		for (int i = 0; i < count; i++) {
		mAttachedViews.get(i).clearFormatAndUpdate();
		}
		}

		long getSoonestUpdateTime() {
		long result = Long.MAX_VALUE;
		final int count = mAttachedViews.size();
		for (int i = 0; i < count; i++) {
		final long time = mAttachedViews.get(i).mUpdateTimeMillis;
		if (time < result) {
		result = time;
		}
		}
		return result;
		}

		void register(Context context) {
		final IntentFilter filter = new IntentFilter();
		filter.addAction(Intent.ACTION_TIME_TICK);
		filter.addAction(Intent.ACTION_TIME_CHANGED);
		filter.addAction(Intent.ACTION_CONFIGURATION_CHANGED);
		filter.addAction(Intent.ACTION_TIMEZONE_CHANGED);
		context.registerReceiver(mReceiver, filter);

		final Uri uri = Settings.System.getUriFor(Settings.System.DATE_FORMAT);
		context.getContentResolver().registerContentObserver(uri, true, mObserver);
		}

		void unregister(Context context) {
		context.unregisterReceiver(mReceiver);
		context.getContentResolver().unregisterContentObserver(mObserver);
		}
		}
		}