1 /* 2 * Copyright 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.example.android.revealeffectbasic; 17 18 import com.example.android.common.logger.Log; 19 20 import android.animation.Animator; 21 import android.animation.ValueAnimator; 22 import android.support.v4.app.Fragment; 23 import android.os.Bundle; 24 import android.view.LayoutInflater; 25 import android.view.MotionEvent; 26 import android.view.View; 27 import android.view.ViewAnimationUtils; 28 import android.view.ViewGroup; 29 import android.view.animation.AccelerateDecelerateInterpolator; 30 31 /** 32 * This sample shows a view that is revealed when a button is clicked. 33 */ 34 public class RevealEffectBasicFragment extends Fragment { 35 36 private final static String TAG = "RevealEffectBasicFragment"; 37 38 @Override onCreate(Bundle savedInstanceState)39 public void onCreate(Bundle savedInstanceState) { 40 super.onCreate(savedInstanceState); 41 setHasOptionsMenu(true); 42 } 43 44 @Override onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)45 public View onCreateView(LayoutInflater inflater, ViewGroup container, 46 Bundle savedInstanceState) { 47 final View rootView = inflater.inflate(R.layout.reveal_effect_basic, container, false); 48 49 View button = rootView.findViewById(R.id.button); 50 51 // Set a listener to reveal the view when clicked. 52 button.setOnClickListener(new View.OnClickListener() { 53 @Override 54 public void onClick(View view) { 55 View shape = rootView.findViewById(R.id.circle); 56 57 // Create a reveal {@link Animator} that starts clipping the view from 58 // the top left corner until the whole view is covered. 59 Animator animator = ViewAnimationUtils.createCircularReveal( 60 shape, 61 0, 62 0, 63 0, 64 (float) Math.hypot(shape.getWidth(), shape.getHeight())); 65 66 // Set a natural ease-in/ease-out interpolator. 67 animator.setInterpolator(new AccelerateDecelerateInterpolator()); 68 69 // Finally start the animation 70 animator.start(); 71 72 Log.d(TAG, "Starting Reveal animation"); 73 } 74 }); 75 76 return rootView; 77 } 78 79 }