change package name to uiuios

src/com/android/uiuios/Alarm.java

@@ -0,0 +1,87 @@
+/*
+ * 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.uiuios;
+
+import android.os.Handler;
+import android.os.SystemClock;
+
+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 = SystemClock.uptimeMillis();
+        mAlarmPending = true;
+        long oldTriggerTime = mAlarmTriggerTime;
+        mAlarmTriggerTime = currentTime + millisecondsInFuture;
+
+        // If the previous alarm was set for a longer duration, cancel it.
+        if (mWaitingForCallback && oldTriggerTime > mAlarmTriggerTime) {
+            mHandler.removeCallbacks(this);
+            mWaitingForCallback = false;
+        }
+        if (!mWaitingForCallback) {
+            mHandler.postDelayed(this, mAlarmTriggerTime - currentTime);
+            mWaitingForCallback = true;
+        }
+    }
+
+    public void cancelAlarm() {
+        mAlarmPending = false;
+    }
+
+    // this is called when our timer runs out
+    public void run() {
+        mWaitingForCallback = false;
+        if (mAlarmPending) {
+            long currentTime = SystemClock.uptimeMillis();
+            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;
+    }
+}