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-rw-r--r--src/com/android/launcher3/Alarm.java84
1 files changed, 84 insertions, 0 deletions
diff --git a/src/com/android/launcher3/Alarm.java b/src/com/android/launcher3/Alarm.java
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+++ b/src/com/android/launcher3/Alarm.java
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+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher3;
+
+import android.os.Handler;
+
+public class Alarm implements Runnable{
+ // if we reach this time and the alarm hasn't been cancelled, call the listener
+ private long mAlarmTriggerTime;
+
+ // if we've scheduled a call to run() (ie called mHandler.postDelayed), this variable is true.
+ // We use this to avoid having multiple pending callbacks
+ private boolean mWaitingForCallback;
+
+ private Handler mHandler;
+ private OnAlarmListener mAlarmListener;
+ private boolean mAlarmPending = false;
+
+ public Alarm() {
+ mHandler = new Handler();
+ }
+
+ public void setOnAlarmListener(OnAlarmListener alarmListener) {
+ mAlarmListener = alarmListener;
+ }
+
+ // Sets the alarm to go off in a certain number of milliseconds. If the alarm is already set,
+ // it's overwritten and only the new alarm setting is used
+ public void setAlarm(long millisecondsInFuture) {
+ long currentTime = System.currentTimeMillis();
+ mAlarmPending = true;
+ mAlarmTriggerTime = currentTime + millisecondsInFuture;
+ if (!mWaitingForCallback) {
+ mHandler.postDelayed(this, mAlarmTriggerTime - currentTime);
+ mWaitingForCallback = true;
+ }
+ }
+
+ public void cancelAlarm() {
+ mAlarmTriggerTime = 0;
+ mAlarmPending = false;
+ }
+
+ // this is called when our timer runs out
+ public void run() {
+ mWaitingForCallback = false;
+ if (mAlarmTriggerTime != 0) {
+ long currentTime = System.currentTimeMillis();
+ if (mAlarmTriggerTime > currentTime) {
+ // We still need to wait some time to trigger spring loaded mode--
+ // post a new callback
+ mHandler.postDelayed(this, Math.max(0, mAlarmTriggerTime - currentTime));
+ mWaitingForCallback = true;
+ } else {
+ mAlarmPending = false;
+ if (mAlarmListener != null) {
+ mAlarmListener.onAlarm(this);
+ }
+ }
+ }
+ }
+
+ public boolean alarmPending() {
+ return mAlarmPending;
+ }
+}
+
+interface OnAlarmListener {
+ public void onAlarm(Alarm alarm);
+}