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      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
     39     public void onCreate(Bundle savedInstanceState) {
     40         super.onCreate(savedInstanceState);
     41         setHasOptionsMenu(true);
     42     }
     43 
     44     @Override
     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 }