Add ApiDemo to show the new seeking behavior of Animator

Change-Id: I4ad4e322af9c1d8419e1d7f8bea6b20951a1dc4f

samples/ApiDemos/AndroidManifest.xml

@@ -787,6 +787,17 @@
             </intent-filter>
         </receiver>
 
+        <!-- ************************************* -->
+        <!--     ANDROID.ANIMATION PACKAGE SAMPLES         -->
+        <!-- ************************************* -->
+
+        <activity android:name=".animation.AnimationSeeking" android:label="Animation/Seeking">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.SAMPLE_CODE" />
+            </intent-filter>
+        </activity>
+
         <!-- ************************************* -->
         <!--     ANIMATION PACKAGE SAMPLES         -->
         <!-- ************************************* -->

samples/ApiDemos/res/layout/animation_seeking.xml

@@ -0,0 +1,40 @@
+<?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="Run"
+            android:id="@+id/startButton"
+            />
+        <SeekBar
+            android:orientation="horizontal"
+            android:layout_width="fill_parent"
+            android:layout_height="wrap_content"
+            android:id="@+id/seekBar"
+        />
+    </LinearLayout>
+</LinearLayout>

samples/ApiDemos/src/com/example/android/apis/animation/AnimationSeeking.java

@@ -0,0 +1,184 @@
+/*
+ * 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 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.animation.Animatable.AnimatableListener;
+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.BounceInterpolator;
+import android.widget.Button;
+import android.widget.LinearLayout;
+import android.widget.SeekBar;
+
+/**
+ * This application demonstrates the seeking capability of Animator. The SeekBar in the
+ * UI allows you to set the position of the animation. Pressing the Run button will play from
+ * the current position of the animation.
+ */
+public class AnimationSeeking extends Activity {
+
+    private static final int DURATION = 1500;
+    private SeekBar mSeekBar;
+
+    /** Called when the activity is first created. */
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.animation_seeking);
+        LinearLayout container = (LinearLayout) findViewById(R.id.container);
+        final MyAnimationView animView = new MyAnimationView(this);
+        container.addView(animView);
+
+        Button starter = (Button) findViewById(R.id.startButton);
+        starter.setOnClickListener(new View.OnClickListener() {
+
+            @Override
+            public void onClick(View v) {
+                animView.startAnimation();
+            }
+        });
+
+        mSeekBar = (SeekBar) findViewById(R.id.seekBar);
+        mSeekBar.setMax(DURATION);
+        mSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
+
+            @Override
+            public void onStopTrackingTouch(SeekBar seekBar) {
+            }
+
+            @Override
+            public void onStartTrackingTouch(SeekBar seekBar) {
+            }
+
+            @Override
+            public void onProgressChanged(SeekBar seekBar, int progress,
+                    boolean fromUser) {
+                // prevent seeking on app creation
+                if (animView.getHeight() != 0) {
+                    animView.seek(progress);
+                }
+            }
+        });
+    }
+
+    public class MyAnimationView extends View implements Animator.AnimatorUpdateListener, AnimatableListener {
+
+        private static final int RED = 0xffFF8080;
+        private static final int BLUE = 0xff8080FF;
+        private static final int CYAN = 0xff80ffff;
+        private static final int GREEN = 0xff80ff80;
+        private static final float BALL_SIZE = 100f;
+
+        public final ArrayList<ShapeHolder> balls = new ArrayList<ShapeHolder>();
+        Sequencer animation = null;
+        Animator bounceAnim = null;
+        ShapeHolder ball = null;
+
+        public MyAnimationView(Context context) {
+            super(context);
+            ball = addBall(200, 0);
+        }
+
+        private void createAnimation() {
+            if (bounceAnim == null) {
+                bounceAnim = new PropertyAnimator(1500, ball, "y",
+                        ball.getY(), getHeight() - BALL_SIZE);
+                bounceAnim.setInterpolator(new BounceInterpolator());
+                bounceAnim.addUpdateListener(this);
+            }
+        }
+
+        public void startAnimation() {
+            createAnimation();
+            bounceAnim.start();
+        }
+
+        public void seek(long seekTime) {
+            createAnimation();
+            bounceAnim.setCurrentPlayTime(seekTime);
+        }
+
+        private ShapeHolder addBall(float x, float y) {
+            OvalShape circle = new OvalShape();
+            circle.resize(BALL_SIZE, BALL_SIZE);
+            ShapeDrawable drawable = new ShapeDrawable(circle);
+            ShapeHolder shapeHolder = new ShapeHolder(drawable);
+            shapeHolder.setX(x);
+            shapeHolder.setY(y);
+            int red = (int)(100 + Math.random() * 155);
+            int green = (int)(100 + Math.random() * 155);
+            int blue = (int)(100 + Math.random() * 155);
+            int color = 0xff000000 | red << 16 | green << 8 | blue;
+            Paint paint = drawable.getPaint();
+            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);
+            balls.add(shapeHolder);
+            return shapeHolder;
+        }
+
+        @Override
+        protected void onDraw(Canvas canvas) {
+            canvas.translate(ball.getX(), ball.getY());
+            ball.getShape().draw(canvas);
+        }
+
+        public void onAnimationUpdate(Animator animation) {
+            invalidate();
+            long playtime = bounceAnim.getCurrentPlayTime();
+            //mSeekBar.setProgress((int)playtime);
+        }
+
+        @Override
+        public void onAnimationCancel(Animatable animation) {
+        }
+
+        @Override
+        public void onAnimationEnd(Animatable animation) {
+            balls.remove(((PropertyAnimator)animation).getTarget());
+
+        }
+
+        @Override
+        public void onAnimationRepeat(Animatable animation) {
+        }
+
+        @Override
+        public void onAnimationStart(Animatable animation) {
+        }
+    }
+}

samples/ApiDemos/src/com/example/android/apis/animation/ShapeHolder.java

@@ -0,0 +1,102 @@
+/*
+ * 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;
+
+import android.graphics.Paint;
+import android.graphics.RadialGradient;
+import android.graphics.drawable.ShapeDrawable;
+import android.graphics.drawable.shapes.Shape;
+import android.view.View;
+
+/**
+ * A data structure that holds a Shape and various properties that can be used to define
+ * how the shape is drawn.
+ */
+public class ShapeHolder {
+    private float x = 0, y = 0;
+    private ShapeDrawable shape;
+    private int color;
+    private RadialGradient gradient;
+    private float alpha = 1f;
+    private Paint paint;
+
+    public void setPaint(Paint value) {
+        paint = value;
+    }
+    public Paint getPaint() {
+        return paint;
+    }
+
+    public void setX(float value) {
+        x = value;
+    }
+    public float getX() {
+        return x;
+    }
+    public void setY(float value) {
+        y = value;
+    }
+    public float getY() {
+        return y;
+    }
+    public void setShape(ShapeDrawable value) {
+        shape = value;
+    }
+    public ShapeDrawable getShape() {
+        return shape;
+    }
+    public int getColor() {
+        return color;
+    }
+    public void setColor(int value) {
+        color = value;
+    }
+    public void setGradient(RadialGradient value) {
+        gradient = value;
+    }
+    public RadialGradient getGradient() {
+        return gradient;
+    }
+
+    public void setAlpha(float alpha) {
+        this.alpha = alpha;
+        shape.setAlpha((int)((alpha * 255f) + .5f));
+    }
+
+    public float getWidth() {
+        //return shape.getIntrinsicWidth();
+        return shape.getShape().getWidth();
+    }
+    public void setWidth(float width) {
+        //shape.setIntrinsicWidth(width);
+        Shape s = shape.getShape();
+        s.resize(width, s.getHeight());
+    }
+
+    public float getHeight() {
+        return shape.getShape().getHeight();
+    }
+    public void setHeight(float height) {
+        Shape s = shape.getShape();
+        s.resize(s.getWidth(), height);
+        //shape.setIntrinsicHeight(height);
+    }
+
+    public ShapeHolder(ShapeDrawable s) {
+        shape = s;
+    }
+}