Issue 460, auto timeout of CaptureActivity after inactivity, for testing. Also break...

[zxing.git] / android / src / com / google / zxing / client / android / InactivityTimer.java

diff --git a/android/src/com/google/zxing/client/android/InactivityTimer.java b/android/src/com/google/zxing/client/android/InactivityTimer.java
new file mode 100644 (file)
index 0000000..01c51eb
--- /dev/null
+++ b/android/src/com/google/zxing/client/android/InactivityTimer.java
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2010 ZXing authors
+ *
+ * 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.google.zxing.client.android;
+
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.ScheduledFuture;
+import java.util.concurrent.ThreadFactory;
+import java.util.concurrent.TimeUnit;
+
+import android.app.Activity;
+
+/**
+ * Finishes an activity after a period of inactivity.
+ */
+final class InactivityTimer {
+
+  private static final int INACTIVITY_DELAY_MINUTES = 3;
+
+  private final ScheduledExecutorService inactivityTimer =
+      Executors.newSingleThreadScheduledExecutor(new DaemonThreadFactory());
+  private final Activity activity;
+  private ScheduledFuture<?> inactivityFuture = null;
+
+  InactivityTimer(Activity activity) {
+    this.activity = activity;
+    onActivity();
+  }
+
+  void onActivity() {
+    cancel();
+    inactivityFuture = inactivityTimer.schedule(new FinishListener(activity),
+                                                INACTIVITY_DELAY_MINUTES,
+                                                TimeUnit.MINUTES);
+  }
+
+  private void cancel() {
+    if (inactivityFuture != null) {
+      inactivityFuture.cancel(true);
+      inactivityFuture = null;
+    }
+  }
+
+  void shutdown() {
+    cancel();
+    inactivityTimer.shutdown();
+  }
+
+  private static final class DaemonThreadFactory implements ThreadFactory {
+    public Thread newThread(Runnable runnable) {
+      Thread thread = new Thread(runnable);
+      thread.setDaemon(true);
+      return thread;
+    }
+  }
+
+}