From 61779142131838eaca0ecd2e291fb8b929a88b2a Mon Sep 17 00:00:00 2001
From: Eric House <eehouse@eehouse.org>
Date: Thu, 22 Nov 2018 08:13:49 -0800
Subject: [PATCH] add lifecycle lib (events only logged only so far)

---
 xwords4/android/app/build.gradle                |  3 +++
 .../java/org/eehouse/android/xw4/XWApp.java     | 17 ++++++++++++++++-
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/xwords4/android/app/build.gradle b/xwords4/android/app/build.gradle
index 2176ad851..94d68ce0b 100644
--- a/xwords4/android/app/build.gradle
+++ b/xwords4/android/app/build.gradle
@@ -208,6 +208,9 @@ dependencies {
     implementation "com.android.support:support-v4:$SUPPORT_LIB_VERSION"
     implementation "com.android.support:support-compat:$SUPPORT_LIB_VERSION"
 
+    implementation "android.arch.lifecycle:extensions:1.1.1"
+    annotationProcessor "android.arch.lifecycle:compiler:1.1.1"
+
     // 2.6.8 is probably as far forward as I can go without upping my
     // min-supported SDK version
     xw4dImplementation('com.crashlytics.sdk.android:crashlytics:2.6.3@aar') {
diff --git a/xwords4/android/app/src/main/java/org/eehouse/android/xw4/XWApp.java b/xwords4/android/app/src/main/java/org/eehouse/android/xw4/XWApp.java
index 15cde5677..307b1230f 100644
--- a/xwords4/android/app/src/main/java/org/eehouse/android/xw4/XWApp.java
+++ b/xwords4/android/app/src/main/java/org/eehouse/android/xw4/XWApp.java
@@ -21,6 +21,11 @@
 package org.eehouse.android.xw4;
 
 import android.app.Application;
+import android.arch.lifecycle.Lifecycle;
+import android.arch.lifecycle.LifecycleObserver;
+import android.arch.lifecycle.LifecycleOwner;
+import android.arch.lifecycle.OnLifecycleEvent;
+import android.arch.lifecycle.ProcessLifecycleOwner;
 import android.content.Context;
 import android.graphics.Color;
 import android.os.Build;
@@ -32,7 +37,9 @@ import java.util.UUID;
 
 import junit.framework.Assert;
 
-public class XWApp extends Application {
+import static android.arch.lifecycle.Lifecycle.Event.ON_ANY;
+
+public class XWApp extends Application implements LifecycleObserver {
     private static final String TAG = XWApp.class.getSimpleName();
 
     public static final boolean BTSUPPORTED = true;
@@ -65,6 +72,8 @@ public class XWApp extends Application {
         Assert.assertTrue( s_context == s_context.getApplicationContext() );
         super.onCreate();
 
+        ProcessLifecycleOwner.get().getLifecycle().addObserver(this);
+
         // This one line should always get logged even if logging is
         // off -- because logging is on by default until logEnable is
         // called.
@@ -91,6 +100,12 @@ public class XWApp extends Application {
         WiDirWrapper.init( this );
     }
 
+    @OnLifecycleEvent(ON_ANY)
+    public void onAny(LifecycleOwner source, Lifecycle.Event event)
+    {
+        Log.d( TAG, "onAny(%s, %s)", source, event );
+    }
+
     // This is called on emulator only, but good for ensuring no memory leaks
     // by forcing JNI cleanup
     @Override