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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 android.animation.Animator;
     19 import android.os.Bundle;
     20 import android.support.annotation.Nullable;
     21 import android.support.v4.app.Fragment;
     22 import android.view.LayoutInflater;
     23 import android.view.View;
     24 import android.view.ViewAnimationUtils;
     25 import android.view.ViewGroup;
     26 import android.view.animation.AccelerateDecelerateInterpolator;
     27 
     28 import com.example.android.common.logger.Log;
     29 
     30 /**
     31  * This sample shows a view that is revealed when a button is clicked.
     32  */
     33 public class RevealEffectBasicFragment extends Fragment {
     34 
     35     private final static String TAG = "RevealEffectBasicFragment";
     36 
     37     @Override
     38     public void onCreate(Bundle savedInstanceState) {
     39         super.onCreate(savedInstanceState);
     40         setHasOptionsMenu(true);
     41     }
     42 
     43     @Override
     44     public View onCreateView(LayoutInflater inflater, ViewGroup container,
     45                              Bundle savedInstanceState) {
     46         return inflater.inflate(R.layout.reveal_effect_basic, container, false);
     47     }
     48 
     49     @Override
     50     public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
     51         final View shape = view.findViewById(R.id.circle);
     52         final View button = view.findViewById(R.id.button);
     53         // Set a listener to reveal the view when clicked.
     54         button.setOnClickListener(new View.OnClickListener() {
     55             @Override
     56             public void onClick(View view) {
     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 circularReveal = ViewAnimationUtils.createCircularReveal(
     60                         shape,
     61                         0,
     62                         0,
     63                         0,
     64                         (float) Math.hypot(shape.getWidth(), shape.getHeight()));
     65                 circularReveal.setInterpolator(new AccelerateDecelerateInterpolator());
     66 
     67                 // Finally start the animation
     68                 circularReveal.start();
     69 
     70                 Log.d(TAG, "Starting Reveal animation");
     71             }
     72         });
     73         super.onViewCreated(view, savedInstanceState);
     74     }
     75 }