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The source code is released under:
Apache License
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/* * Copyright (C) 2010 The Android Open Source Project *//from w w w . j av a 2 s. c o m * 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.jakewharton.nineoldandroids.sample.apidemos; import java.util.ArrayList; 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.CheckBox; import android.widget.LinearLayout; import android.widget.TextView; import com.nineoldandroids.animation.Animator; import com.nineoldandroids.animation.AnimatorSet; import com.nineoldandroids.animation.ObjectAnimator; import com.nineoldandroids.animation.ValueAnimator; import com.jakewharton.nineoldandroids.sample.R; /** * This demo shows how the AnimatorListener events work. */ public class AnimatorEvents extends Activity { private static final int OFF = 0x77FFFFFF; private static final int ON = 0xFFFFFFFF; 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.setTextColor(OFF); repeatText = (TextView) findViewById(R.id.repeatText); repeatText.setTextColor(OFF); cancelText = (TextView) findViewById(R.id.cancelText); cancelText.setTextColor(OFF); endText = (TextView) findViewById(R.id.endText); endText.setTextColor(OFF); startTextAnimator = (TextView) findViewById(R.id.startTextAnimator); startTextAnimator.setTextColor(OFF); repeatTextAnimator = (TextView) findViewById(R.id.repeatTextAnimator); repeatTextAnimator.setTextColor(OFF); cancelTextAnimator = (TextView) findViewById(R.id.cancelTextAnimator); cancelTextAnimator.setTextColor(OFF); endTextAnimator = (TextView) findViewById(R.id.endTextAnimator); endTextAnimator.setTextColor(OFF); final CheckBox endCB = (CheckBox) findViewById(R.id.endCB); Button starter = (Button) findViewById(R.id.startButton); starter.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { animView.startAnimation(endCB.isChecked()); } }); Button canceler = (Button) findViewById(R.id.cancelButton); canceler.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { animView.cancelAnimation(); } }); Button ender = (Button) findViewById(R.id.endButton); ender.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { animView.endAnimation(); } }); } public class MyAnimationView extends View implements Animator.AnimatorListener, ValueAnimator.AnimatorUpdateListener { public final ArrayList<ShapeHolder> balls = new ArrayList<ShapeHolder>(); Animator animation; ShapeHolder ball = null; boolean endImmediately = false; public MyAnimationView(Context context) { super(context); ball = createBall(25, 25); } private void createAnimation() { if (animation == null) { ObjectAnimator yAnim = ObjectAnimator.ofFloat(ball, "y", ball.getY(), getHeight() - 50f).setDuration(1500); yAnim.setRepeatCount(0); yAnim.setRepeatMode(ValueAnimator.REVERSE); yAnim.setInterpolator(new AccelerateInterpolator(2f)); yAnim.addUpdateListener(this); yAnim.addListener(this); ObjectAnimator xAnim = ObjectAnimator.ofFloat(ball, "x", ball.getX(), ball.getX() + 300).setDuration(1000); xAnim.setStartDelay(0); xAnim.setRepeatCount(0); xAnim.setRepeatMode(ValueAnimator.REVERSE); xAnim.setInterpolator(new AccelerateInterpolator(2f)); ObjectAnimator alphaAnim = ObjectAnimator.ofFloat(ball, "alpha", 1f, .5f). setDuration(1000); AnimatorSet alphaSeq = new AnimatorSet(); alphaSeq.play(alphaAnim); animation = new AnimatorSet(); ((AnimatorSet) animation).playTogether(yAnim, xAnim); animation.addListener(this); } } public void startAnimation(boolean endImmediately) { this.endImmediately = endImmediately; startText.setTextColor(OFF); repeatText.setTextColor(OFF); cancelText.setTextColor(OFF); endText.setTextColor(OFF); startTextAnimator.setTextColor(OFF); repeatTextAnimator.setTextColor(OFF); cancelTextAnimator.setTextColor(OFF); endTextAnimator.setTextColor(OFF); 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(ValueAnimator animation) { invalidate(); } public void onAnimationStart(Animator animation) { if (animation instanceof AnimatorSet) { startText.setTextColor(ON); } else { startTextAnimator.setTextColor(ON); } if (endImmediately) { animation.end(); } } public void onAnimationEnd(Animator animation) { if (animation instanceof AnimatorSet) { endText.setTextColor(ON); } else { endTextAnimator.setTextColor(ON); } } public void onAnimationCancel(Animator animation) { if (animation instanceof AnimatorSet) { cancelText.setTextColor(ON); } else { cancelTextAnimator.setTextColor(ON); } } public void onAnimationRepeat(Animator animation) { if (animation instanceof AnimatorSet) { repeatText.setTextColor(ON); } else { repeatTextAnimator.setTextColor(ON); } } } }