Merge pull request #4 from the-reach-trust/master

Fix steps on lost context

app/build.gradle

@@ -6,7 +6,7 @@ android {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
     }
-    
+
     compileSdkVersion 26
     buildToolsVersion "26.0.1"
     defaultConfig {
@@ -31,5 +31,5 @@ repositories {
 
 dependencies {
     implementation project(':showcasecard')
-    implementation 'com.android.support:appcompat-v7:26.0.1'
+    implementation 'com.android.support:appcompat-v7:26.0.2'
 }

build.gradle

@@ -3,19 +3,23 @@
 buildscript {
     repositories {
         maven { url "https://jitpack.io" }
+        jcenter()
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.0.0-beta2'
+        classpath 'com.android.tools.build:gradle:3.0.0-beta5'
         classpath 'com.github.dcendents:android-maven-gradle-plugin:2.0'
-
+    }
+    dependencies {
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
     }
 }
 
 allprojects {
     repositories {
+        maven { url "https://jitpack.io" }
+        jcenter()
         google()
     }
 }

showcasecard/build.gradle

@@ -30,7 +30,7 @@ android {
 }
 
 dependencies {
-    api 'com.android.support:appcompat-v7:26.0.1'
+    api 'com.android.support:appcompat-v7:26.0.2'
 }
 repositories {
     google()

showcasecard/src/main/java/ru/dimorinny/showcasecard/step/ShowCaseStepDisplayer.java

@@ -93,6 +93,10 @@ public void dismiss() {
      */
     private void tryShowNextTip() {
 
+        if (!isContextActive()) {
+            return;
+        }
+
         if (currentlyDisplayedTipIndex >= items.size() - 1) {
 
             // end of tips reached.
@@ -133,6 +137,10 @@ private void displayTip(ShowCaseStep item) {
 
     private void doDisplayTip(ShowCaseStep item) {
 
+        if (!isContextActive()) {
+            return;
+        }
+
         if (showCaseView != null) {
             // completely remove old view now:
             showCaseView.hide();
@@ -184,6 +192,18 @@ public void setSteps(List<ShowCaseStep> items) {
         this.items = items;
     }
 
+    /**
+     * Returns true if the attached Context is still active / not shutting down.
+     */
+    private boolean isContextActive() {
+        if (fragment != null) {
+            return fragment.isAdded();
+        } else if (activity != null) {
+            return !activity.isFinishing();
+        }
+        return true;
+    }
+
     public static class Builder {
 
         @Nullable