Merge pull request #320 from amlcurran/multi-showcase

Fix memory management issues

library/src/main/java/com/github/amlcurran/showcaseview/ShowcaseView.java

@@ -34,7 +34,6 @@
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.ViewGroup;
-import android.view.ViewTreeObserver;
 import android.widget.Button;
 import android.widget.RelativeLayout;
 
@@ -112,9 +111,6 @@ protected ShowcaseView(Context context, AttributeSet attrs, int defStyle, boolea
         showcaseAreaCalculator = new ShowcaseAreaCalculator();
         shotStateStore = new ShotStateStore(context);
 
-        getViewTreeObserver().addOnPreDrawListener(new CalculateTextOnPreDraw());
-        getViewTreeObserver().addOnGlobalLayoutListener(new UpdateOnGlobalLayout());
-
         // Get the attributes for the ShowcaseView
         final TypedArray styled = context.getTheme()
                 .obtainStyledAttributes(attrs, R.styleable.ShowcaseView, R.attr.showcaseViewStyle,
@@ -173,6 +169,7 @@ void setShowcasePosition(int x, int y) {
         showcaseX = x - positionInWindow[0];
         showcaseY = y - positionInWindow[1];
         //init();
+        recalculateText();
         invalidate();
     }
 
@@ -212,7 +209,6 @@ private void updateBitmap() {
                 bitmapBuffer.recycle();
             }
             bitmapBuffer = Bitmap.createBitmap(getMeasuredWidth(), getMeasuredHeight(), Bitmap.Config.ARGB_8888);
-
         }
     }
 
@@ -310,7 +306,6 @@ protected void dispatchDraw(Canvas canvas) {
 
     @Override
     public void hide() {
-        clearBitmap();
         // If the type is set to one-shot, store that it has shot
         shotStateStore.storeShot();
         mEventListener.onShowcaseViewHide(this);
@@ -330,6 +325,7 @@ this, fadeOutMillis, new AnimationEndListener() {
                     @Override
                     public void onAnimationEnd() {
                         setVisibility(View.GONE);
+                        clearBitmap();
                         isShowing = false;
                         mEventListener.onShowcaseViewDidHide(ShowcaseView.this);
                     }
@@ -340,10 +336,17 @@ public void onAnimationEnd() {
     @Override
     public void show() {
         isShowing = true;
+        if (canUpdateBitmap()) {
+            updateBitmap();
+        }
         mEventListener.onShowcaseViewShow(this);
         fadeInShowcase();
     }
 
+    private boolean canUpdateBitmap() {
+        return getMeasuredHeight() > 0 && getMeasuredWidth() > 0;
+    }
+
     private void fadeInShowcase() {
         animationFactory.fadeInView(
                 this, fadeInMillis,
@@ -805,25 +808,6 @@ private void tintButton(int showcaseColor, boolean tintButton) {
         }
     }
 
-    private class UpdateOnGlobalLayout implements ViewTreeObserver.OnGlobalLayoutListener {
-
-        @Override
-        public void onGlobalLayout() {
-            if (!shotStateStore.hasShot()) {
-                updateBitmap();
-            }
-        }
-    }
-
-    private class CalculateTextOnPreDraw implements ViewTreeObserver.OnPreDrawListener {
-
-        @Override
-        public boolean onPreDraw() {
-            recalculateText();
-            return true;
-        }
-    }
-
     private OnClickListener hideOnClickListener = new OnClickListener() {
         @Override
         public void onClick(View v) {

sample/src/main/AndroidManifest.xml

@@ -36,6 +36,8 @@
 
         <activity android:name=".animations.AnimationSampleActivity" />
 
+        <activity android:name=".MemoryManagementTesting" />
+
         <activity android:name=".SingleShotActivity" />
 
         <activity android:name=".CustomTextActivity" />

sample/src/main/java/com/github/amlcurran/showcaseview/sample/MemoryManagementTesting.java

@@ -19,21 +19,43 @@
 import android.app.Activity;
 import android.os.Bundle;
 
-public class MemoryManagementTesting extends Activity {
+import com.github.amlcurran.showcaseview.OnShowcaseEventListener;
+import com.github.amlcurran.showcaseview.ShowcaseView;
+import com.github.amlcurran.showcaseview.targets.ViewTarget;
+
+public class MemoryManagementTesting extends Activity implements OnShowcaseEventListener {
+
+    int currentShowcase = 1;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.main);
+        showcase();
+    }
+
+    private void showcase() {
+        new ShowcaseView.Builder(this)
+                .withMaterialShowcase()
+                .setContentText(String.format("Showing %1$d", currentShowcase))
+                .setTarget(new ViewTarget(R.id.buttonBlocked, this))
+                .setShowcaseEventListener(this)
+                .build();
+    }
+
+    @Override
+    public void onShowcaseViewHide(ShowcaseView showcaseView) {
 
-//        ShowcaseViews showcaseViews = new ShowcaseViews(this);
-//
-//        ShowcaseViews.ItemViewProperties properties = new ShowcaseViews.ItemViewProperties(
-//                R.id.buttonBlocked, R.string.showcase_like_title, R.string.showcase_like_message
-//        );
-//
-//        showcaseViews.addView(properties).addView(properties).addView(properties).addView(properties)
-//                .addView(properties).addView(properties).show();
+    }
+
+    @Override
+    public void onShowcaseViewDidHide(ShowcaseView showcaseView) {
+        currentShowcase++;
+        showcase();
+    }
+
+    @Override
+    public void onShowcaseViewShow(ShowcaseView showcaseView) {
 
     }
 }

sample/src/main/java/com/github/amlcurran/showcaseview/sample/SampleActivity.java

@@ -140,6 +140,9 @@ public void onItemClick(AdapterView<?> adapterView, View view, int position, lon
             case 4:
                 startActivity(new Intent(this, CustomShowcaseActivity.class));
                 break;
+            case 5:
+                startActivity(new Intent(this, MemoryManagementTesting.class));
+                break;
         }
     }
 
@@ -150,15 +153,17 @@ private static class HardcodedListAdapter extends ArrayAdapter {
                 R.string.title_animations,
                 R.string.title_single_shot,
                 R.string.custom_text,
-                 R.string.custom_showcase_title//, R.string.title_memory
+                 R.string.custom_showcase_title,
+                R.string.title_memory
         };
 
         private static final int[] SUMMARY_RES_IDS = new int[] {
                 R.string.sum_action_items,
                 R.string.sum_animations,
                 R.string.sum_single_shot,
                 R.string.custom_text_summary,
-                R.string.custom_showcase_summary//, R.string.sum_memory
+                R.string.custom_showcase_summary,
+                R.string.sum_memory
         };
 
         public HardcodedListAdapter(Context context) {

sample/src/main/res/layout/activity_memory.xml

@@ -0,0 +1,36 @@
+<!--
+  ~ Copyright 2014 Alex Curran
+  ~
+  ~ 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.
+  -->
+
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="fill_parent"
+    android:layout_height="fill_parent"
+    android:orientation="vertical">
+
+    <android.support.v7.widget.Toolbar
+            android:layout_width="match_parent"
+            android:id="@+id/toolbar"
+            android:layout_height="wrap_content"/>
+
+    <Button
+        android:id="@+id/buttonBlocked"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Button"
+        android:minWidth="96dp"
+        android:layout_margin="16dp"
+        android:layout_gravity="center_horizontal" />
+
+</LinearLayout>