Demo for using and testing animation events

Change-Id: I7db791928dc590fd724f4c71565b42bc366e519c
diff --git a/samples/ApiDemos/AndroidManifest.xml b/samples/ApiDemos/AndroidManifest.xml
index fe8d84a..08f86a0 100644
--- a/samples/ApiDemos/AndroidManifest.xml
+++ b/samples/ApiDemos/AndroidManifest.xml
@@ -839,6 +839,13 @@
             </intent-filter>
         </activity>
 
+        <activity android:name=".animation.AnimatorEvents" android:label="Animation/Events">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.SAMPLE_CODE" />
+            </intent-filter>
+        </activity>
+
         <activity android:name=".animation.BouncingBalls"
                   android:label="Animation/Bouncing Balls">
             <intent-filter>
diff --git a/samples/ApiDemos/res/layout/animator_events.xml b/samples/ApiDemos/res/layout/animator_events.xml
new file mode 100644
index 0000000..f289b5b
--- /dev/null
+++ b/samples/ApiDemos/res/layout/animator_events.xml
@@ -0,0 +1,122 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- 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.
+-->
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical"
+    android:layout_width="fill_parent"
+    android:layout_height="fill_parent"
+    android:id="@+id/container"
+    >
+    <LinearLayout
+        android:orientation="horizontal"
+        android:layout_width="fill_parent"
+        android:layout_height="wrap_content"
+        >
+        <Button
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="Play"
+            android:id="@+id/startButton"
+            />
+        <Button
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="Cancel"
+            android:id="@+id/cancelButton"
+            />
+        <Button
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="End"
+            android:id="@+id/endButton"
+            />
+        <CheckBox
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="End Immediately"
+            android:id="@+id/endCB"
+            />
+    </LinearLayout>
+    <LinearLayout
+        android:orientation="horizontal"
+        android:layout_width="fill_parent"
+        android:layout_height="wrap_content"
+        >
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="Sequencer Events:   "
+            />
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="Start   "
+            android:id="@+id/startText"
+            />
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="Repeat   "
+            android:id="@+id/repeatText"
+            />
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="Cancel   "
+            android:id="@+id/cancelText"
+            />
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="End"
+            android:id="@+id/endText"
+            />
+    </LinearLayout>
+    <LinearLayout
+        android:orientation="horizontal"
+        android:layout_width="fill_parent"
+        android:layout_height="wrap_content"
+        >
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="Animator Events:   "
+            />
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="Start   "
+            android:id="@+id/startTextAnimator"
+            />
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="Repeat   "
+            android:id="@+id/repeatTextAnimator"
+            />
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="Cancel   "
+            android:id="@+id/cancelTextAnimator"
+            />
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="End"
+            android:id="@+id/endTextAnimator"
+            />
+    </LinearLayout>
+</LinearLayout>
diff --git a/samples/ApiDemos/src/com/example/android/apis/animation/AnimatorEvents.java b/samples/ApiDemos/src/com/example/android/apis/animation/AnimatorEvents.java
new file mode 100644
index 0000000..f10db16
--- /dev/null
+++ b/samples/ApiDemos/src/com/example/android/apis/animation/AnimatorEvents.java
@@ -0,0 +1,234 @@
+/*
+ * 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.example.android.apis.animation;
+
+// Need the following import to get access to the app resources, since this
+// class is in a sub-package.
+import android.widget.CheckBox;
+import android.widget.TextView;
+import com.example.android.apis.R;
+
+import java.util.ArrayList;
+
+import android.animation.Animatable;
+import android.animation.Animator;
+import android.animation.PropertyAnimator;
+import android.animation.Sequencer;
+import android.app.Activity;
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.graphics.RadialGradient;
+import android.graphics.Shader;
+import android.graphics.drawable.ShapeDrawable;
+import android.graphics.drawable.shapes.OvalShape;
+import android.os.Bundle;
+import android.view.View;
+import android.view.animation.AccelerateInterpolator;
+import android.widget.Button;
+import android.widget.LinearLayout;
+
+/**
+ * This demo shows how the AnimatableListener events work.
+ */
+public class AnimatorEvents extends Activity {
+
+    TextView startText, repeatText, cancelText, endText;
+    TextView startTextAnimator, repeatTextAnimator, cancelTextAnimator, endTextAnimator;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.animator_events);
+        LinearLayout container = (LinearLayout) findViewById(R.id.container);
+        final MyAnimationView animView = new MyAnimationView(this);
+        container.addView(animView);
+        startText = (TextView) findViewById(R.id.startText);
+        startText.setAlpha(.5f);
+        repeatText = (TextView) findViewById(R.id.repeatText);
+        repeatText.setAlpha(.5f);
+        cancelText = (TextView) findViewById(R.id.cancelText);
+        cancelText.setAlpha(.5f);
+        endText = (TextView) findViewById(R.id.endText);
+        endText.setAlpha(.5f);
+        startTextAnimator = (TextView) findViewById(R.id.startTextAnimator);
+        startTextAnimator.setAlpha(.5f);
+        repeatTextAnimator = (TextView) findViewById(R.id.repeatTextAnimator);
+        repeatTextAnimator.setAlpha(.5f);
+        cancelTextAnimator = (TextView) findViewById(R.id.cancelTextAnimator);
+        cancelTextAnimator.setAlpha(.5f);
+        endTextAnimator = (TextView) findViewById(R.id.endTextAnimator);
+        endTextAnimator.setAlpha(.5f);
+        final CheckBox endCB = (CheckBox) findViewById(R.id.endCB);
+
+
+        Button starter = (Button) findViewById(R.id.startButton);
+        starter.setOnClickListener(new View.OnClickListener() {
+
+            @Override
+            public void onClick(View v) {
+                animView.startAnimation(endCB.isChecked());
+            }
+        });
+
+        Button canceler = (Button) findViewById(R.id.cancelButton);
+        canceler.setOnClickListener(new View.OnClickListener() {
+
+            @Override
+            public void onClick(View v) {
+                animView.cancelAnimation();
+            }
+        });
+
+        Button ender = (Button) findViewById(R.id.endButton);
+        ender.setOnClickListener(new View.OnClickListener() {
+
+            @Override
+            public void onClick(View v) {
+                animView.endAnimation();
+            }
+        });
+
+    }
+
+    public class MyAnimationView extends View implements Animatable.AnimatableListener,
+    Animator.AnimatorUpdateListener {
+
+        public final ArrayList<ShapeHolder> balls = new ArrayList<ShapeHolder>();
+        Animatable animation;
+        ShapeHolder ball = null;
+        boolean endImmediately = false;
+
+        public MyAnimationView(Context context) {
+            super(context);
+            ball = createBall(25, 25);
+        }
+
+        private void createAnimation() {
+            if (animation == null) {
+                PropertyAnimator yAnim = new PropertyAnimator(1500, ball, "y",
+                        ball.getY(), getHeight() - 50f);
+                yAnim.setRepeatCount(1);
+                yAnim.setRepeatMode(Animator.REVERSE);
+                yAnim.setInterpolator(new AccelerateInterpolator(2f));
+                yAnim.addUpdateListener(this);
+                yAnim.addListener(this);
+
+                PropertyAnimator xAnim = new PropertyAnimator(1500, ball, "x",
+                        ball.getX(), ball.getX() + 300);
+                xAnim.setRepeatCount(1);
+                xAnim.setRepeatMode(Animator.REVERSE);
+                xAnim.setInterpolator(new AccelerateInterpolator(2f));
+
+                animation = new Sequencer();
+                ((Sequencer) animation).playTogether(yAnim, xAnim);
+                animation.addListener(this);
+            }
+        }
+
+        public void startAnimation(boolean endImmediately) {
+            this.endImmediately = endImmediately;
+            startText.setAlpha(.5f);
+            repeatText.setAlpha(.5f);
+            cancelText.setAlpha(.5f);
+            endText.setAlpha(.5f);
+            startTextAnimator.setAlpha(.5f);
+            repeatTextAnimator.setAlpha(.5f);
+            cancelTextAnimator.setAlpha(.5f);
+            endTextAnimator.setAlpha(.5f);
+            createAnimation();
+            animation.start();
+        }
+
+        public void cancelAnimation() {
+            createAnimation();
+            animation.cancel();
+        }
+
+        public void endAnimation() {
+            createAnimation();
+            animation.end();
+        }
+
+        private ShapeHolder createBall(float x, float y) {
+            OvalShape circle = new OvalShape();
+            circle.resize(50f, 50f);
+            ShapeDrawable drawable = new ShapeDrawable(circle);
+            ShapeHolder shapeHolder = new ShapeHolder(drawable);
+            shapeHolder.setX(x - 25f);
+            shapeHolder.setY(y - 25f);
+            int red = (int)(Math.random() * 255);
+            int green = (int)(Math.random() * 255);
+            int blue = (int)(Math.random() * 255);
+            int color = 0xff000000 | red << 16 | green << 8 | blue;
+            Paint paint = drawable.getPaint(); //new Paint(Paint.ANTI_ALIAS_FLAG);
+            int darkColor = 0xff000000 | red/4 << 16 | green/4 << 8 | blue/4;
+            RadialGradient gradient = new RadialGradient(37.5f, 12.5f,
+                    50f, color, darkColor, Shader.TileMode.CLAMP);
+            paint.setShader(gradient);
+            shapeHolder.setPaint(paint);
+            return shapeHolder;
+        }
+
+        @Override
+        protected void onDraw(Canvas canvas) {
+            canvas.save();
+            canvas.translate(ball.getX(), ball.getY());
+            ball.getShape().draw(canvas);
+            canvas.restore();
+        }
+
+        public void onAnimationUpdate(Animator animation) {
+            invalidate();
+        }
+
+        public void onAnimationStart(Animatable animation) {
+            if (animation instanceof Sequencer) {
+                startText.setAlpha(1f);
+            } else {
+                startTextAnimator.setAlpha(1f);
+            }
+            if (endImmediately) {
+                animation.end();
+            }
+        }
+
+        public void onAnimationEnd(Animatable animation) {
+            if (animation instanceof Sequencer) {
+                endText.setAlpha(1f);
+            } else {
+                endTextAnimator.setAlpha(1f);
+            }
+        }
+
+        public void onAnimationCancel(Animatable animation) {
+            if (animation instanceof Sequencer) {
+                cancelText.setAlpha(1f);
+            } else {
+                cancelTextAnimator.setAlpha(1f);
+            }
+        }
+
+        public void onAnimationRepeat(Animatable animation) {
+            if (animation instanceof Sequencer) {
+                repeatText.setAlpha(1f);
+            } else {
+                repeatTextAnimator.setAlpha(1f);
+            }
+        }
+    }
+}
\ No newline at end of file