1 /*
2  * Copyright (C) 2013 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 
17 package com.example.android.activityanim;
18 
19 import java.util.ArrayList;
20 import java.util.HashMap;
21 
22 import android.app.Activity;
23 import android.content.Intent;
24 import android.content.res.Resources;
25 import android.graphics.ColorMatrix;
26 import android.graphics.ColorMatrixColorFilter;
27 import android.graphics.drawable.BitmapDrawable;
28 import android.os.Bundle;
29 import android.view.Menu;
30 import android.view.MenuItem;
31 import android.view.View;
32 import android.widget.GridLayout;
33 import android.widget.ImageView;
34 
35 /**
36  * This example shows how to create a custom activity animation when you want something more
37  * than window animations can provide. The idea is to disable window animations for the
38  * activities and to instead launch or return from the sub-activity immediately, but use
39  * property animations inside the activities to customize the transition.
40  *
41  * Watch the associated video for this demo on the DevBytes channel of developer.android.com
42  * or on the DevBytes playlist in the androiddevelopers channel on YouTube at
43  * https://www.youtube.com/playlist?list=PLWz5rJ2EKKc_XOgcRukSoKKjewFJZrKV0.
44  */
45 public class ActivityAnimations extends Activity {
46 
47     private static final String PACKAGE = "com.example.android.activityanim";
48     static float sAnimatorScale = 1;
49 
50     GridLayout mGridLayout;
51     HashMap<ImageView, PictureData> mPicturesData = new HashMap<ImageView, PictureData>();
52     BitmapUtils mBitmapUtils = new BitmapUtils();
53 
54     @Override
onCreate(Bundle savedInstanceState)55     protected void onCreate(Bundle savedInstanceState) {
56         super.onCreate(savedInstanceState);
57         setContentView(R.layout.activity_animations);
58 
59         // Grayscale filter used on all thumbnails
60         ColorMatrix grayMatrix = new ColorMatrix();
61         grayMatrix.setSaturation(0);
62         ColorMatrixColorFilter grayscaleFilter = new ColorMatrixColorFilter(grayMatrix);
63 
64         mGridLayout = (GridLayout) findViewById(R.id.gridLayout);
65         mGridLayout.setColumnCount(3);
66         mGridLayout.setUseDefaultMargins(true);
67 
68         // add all photo thumbnails to layout
69         Resources resources = getResources();
70         ArrayList<PictureData> pictures = mBitmapUtils.loadPhotos(resources);
71         for (int i = 0; i < pictures.size(); ++i) {
72             PictureData pictureData = pictures.get(i);
73             BitmapDrawable thumbnailDrawable =
74                     new BitmapDrawable(resources, pictureData.thumbnail);
75             thumbnailDrawable.setColorFilter(grayscaleFilter);
76             ImageView imageView = new ImageView(this);
77             imageView.setOnClickListener(thumbnailClickListener);
78             imageView.setImageDrawable(thumbnailDrawable);
79             mPicturesData.put(imageView, pictureData);
80             mGridLayout.addView(imageView);
81         }
82     }
83 
84     @Override
onCreateOptionsMenu(Menu menu)85     public boolean onCreateOptionsMenu(Menu menu) {
86         getMenuInflater().inflate(R.menu.activity_better_window_animations, menu);
87         return true;
88     }
89 
90     @Override
onOptionsItemSelected(MenuItem item)91     public boolean onOptionsItemSelected(MenuItem item) {
92         if (item.getItemId() == R.id.menu_slow) {
93             sAnimatorScale = item.isChecked() ? 1 : 5;
94             item.setChecked(!item.isChecked());
95         }
96         return super.onOptionsItemSelected(item);
97     }
98 
99     /**
100      * When the user clicks a thumbnail, bundle up information about it and launch the
101      * details activity.
102      */
103     private View.OnClickListener thumbnailClickListener = new View.OnClickListener() {
104 
105         @Override
106         public void onClick(View v) {
107             // Interesting data to pass across are the thumbnail size/location, the
108             // resourceId of the source bitmap, the picture description, and the
109             // orientation (to avoid returning back to an obsolete configuration if
110             // the device rotates again in the meantime)
111             int[] screenLocation = new int[2];
112             v.getLocationOnScreen(screenLocation);
113             PictureData info = mPicturesData.get(v);
114             Intent subActivity = new Intent(ActivityAnimations.this,
115                     PictureDetailsActivity.class);
116             int orientation = getResources().getConfiguration().orientation;
117             subActivity.
118                     putExtra(PACKAGE + ".orientation", orientation).
119                     putExtra(PACKAGE + ".resourceId", info.resourceId).
120                     putExtra(PACKAGE + ".left", screenLocation[0]).
121                     putExtra(PACKAGE + ".top", screenLocation[1]).
122                     putExtra(PACKAGE + ".width", v.getWidth()).
123                     putExtra(PACKAGE + ".height", v.getHeight()).
124                     putExtra(PACKAGE + ".description", info.description);
125             startActivity(subActivity);
126 
127             // Override transitions: we don't want the normal window animation in addition
128             // to our custom one
129             overridePendingTransition(0, 0);
130         }
131     };
132 
133 }
134