├── .gitignore ├── .idea ├── compiler.xml ├── copyright │ └── profiles_settings.xml ├── encodings.xml ├── gradle.xml ├── markdown-navigator │ └── profiles_settings.xml ├── misc.xml ├── modules.xml ├── runConfigurations.xml └── vcs.xml ├── LICENSE.txt ├── README.md ├── app ├── .gitignore ├── build.gradle ├── proguard-rules.pro └── src │ ├── androidTest │ └── java │ │ └── com │ │ └── github │ │ └── rubensousa │ │ └── viewpagercards │ │ └── ApplicationTest.java │ ├── main │ ├── AndroidManifest.xml │ ├── java │ │ └── com │ │ │ └── github │ │ │ └── rubensousa │ │ │ └── viewpagercards │ │ │ ├── CardAdapter.java │ │ │ ├── CardFragment.java │ │ │ ├── CardFragmentPagerAdapter.java │ │ │ ├── CardItem.java │ │ │ ├── CardPagerAdapter.java │ │ │ ├── MainActivity.java │ │ │ └── ShadowTransformer.java │ └── res │ │ ├── drawable │ │ └── ic_bookmark_24dp.xml │ │ ├── layout-land │ │ ├── activity_main.xml │ │ ├── adapter.xml │ │ └── fragment_adapter.xml │ │ ├── layout │ │ ├── activity_main.xml │ │ ├── adapter.xml │ │ └── fragment_adapter.xml │ │ ├── mipmap-hdpi │ │ └── ic_launcher.png │ │ ├── mipmap-mdpi │ │ └── ic_launcher.png │ │ ├── mipmap-xhdpi │ │ └── ic_launcher.png │ │ ├── mipmap-xxhdpi │ │ └── ic_launcher.png │ │ ├── mipmap-xxxhdpi │ │ └── ic_launcher.png │ │ ├── values-land │ │ └── dimens.xml │ │ ├── values-w820dp │ │ └── dimens.xml │ │ └── values │ │ ├── colors.xml │ │ ├── dimens.xml │ │ ├── strings.xml │ │ └── styles.xml │ └── test │ └── java │ └── com │ └── github │ └── rubensousa │ └── viewpagercards │ └── ExampleUnitTest.java ├── build.gradle ├── gif └── ViewPagerCardView.gif ├── gradle.properties ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── gradlew ├── gradlew.bat └── settings.gradle /.gitignore: -------------------------------------------------------------------------------- 1 | *.iml 2 | .gradle 3 | /local.properties 4 | /.idea/workspace.xml 5 | /.idea/libraries 6 | .DS_Store 7 | /build 8 | /captures 9 | -------------------------------------------------------------------------------- /.idea/compiler.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | -------------------------------------------------------------------------------- /.idea/copyright/profiles_settings.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | -------------------------------------------------------------------------------- /.idea/encodings.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | -------------------------------------------------------------------------------- /.idea/gradle.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 17 | 18 | -------------------------------------------------------------------------------- /.idea/markdown-navigator/profiles_settings.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | -------------------------------------------------------------------------------- /.idea/misc.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 38 | 39 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 87 | 97 | 98 | 99 | 100 | 101 | 102 | 103 | 104 | 105 | 106 | 107 | 108 | 109 | 110 | 111 | 112 | 114 | 115 | 116 | 117 | 118 | 1.8 119 | 120 | 125 | 126 | 127 | 128 | 129 | 130 | -------------------------------------------------------------------------------- /.idea/modules.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | -------------------------------------------------------------------------------- /.idea/runConfigurations.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 11 | 12 | -------------------------------------------------------------------------------- /.idea/vcs.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | -------------------------------------------------------------------------------- /LICENSE.txt: -------------------------------------------------------------------------------- 1 | 2 | Apache License 3 | Version 2.0, January 2004 4 | http://www.apache.org/licenses/ 5 | 6 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 7 | 8 | 1. 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We also recommend that a 186 | file or class name and description of purpose be included on the 187 | same "printed page" as the copyright notice for easier 188 | identification within third-party archives. 189 | 190 | Copyright [yyyy] [name of copyright owner] 191 | 192 | Licensed under the Apache License, Version 2.0 (the "License"); 193 | you may not use this file except in compliance with the License. 194 | You may obtain a copy of the License at 195 | 196 | http://www.apache.org/licenses/LICENSE-2.0 197 | 198 | Unless required by applicable law or agreed to in writing, software 199 | distributed under the License is distributed on an "AS IS" BASIS, 200 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 201 | See the License for the specific language governing permissions and 202 | limitations under the License. 203 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # ViewPagerCards 2 | --- 3 | * 欢迎关注微信公众号、长期为您推荐优秀博文、开源项目、视频 4 | 5 | * 微信公众号名称：Android干货程序员 6 | 7 | * ![](http://upload-images.jianshu.io/upload_images/4037105-8f737b5104dd0b5d.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240) 8 | 9 | * 项目总贴:https://github.com/open-android/Android 10 | 11 | 12 | 13 | 14 | ![](./gif/ViewPagerCardView.gif) 15 | 16 | 17 | ## 使用步骤： 18 | ### 第一步：初始化ViewPager： 19 | ``` 20 | 32 | ``` 33 | 34 | ### 第二步：设置setPageTransformer： 35 | ``` 36 | public class ShadowTransformer implements ViewPager.OnPageChangeListener, ViewPager.PageTransformer { 37 | 38 | private ViewPager mViewPager; 39 | private CardAdapter mAdapter; 40 | private float mLastOffset; 41 | private boolean mScalingEnabled; 42 | 43 | public ShadowTransformer(ViewPager viewPager, CardAdapter adapter) { 44 | mViewPager = viewPager; 45 | viewPager.addOnPageChangeListener(this); 46 | mAdapter = adapter; 47 | } 48 | 49 | public void enableScaling(boolean enable) { 50 | if (mScalingEnabled && !enable) { 51 | // shrink main card 52 | CardView currentCard = mAdapter.getCardViewAt(mViewPager.getCurrentItem()); 53 | if (currentCard != null) { 54 | currentCard.animate().scaleY(1); 55 | currentCard.animate().scaleX(1); 56 | } 57 | }else if(!mScalingEnabled && enable){ 58 | // grow main card 59 | CardView currentCard = mAdapter.getCardViewAt(mViewPager.getCurrentItem()); 60 | if (currentCard != null) { 61 | currentCard.animate().scaleY(1.1f); 62 | currentCard.animate().scaleX(1.1f); 63 | } 64 | } 65 | 66 | mScalingEnabled = enable; 67 | } 68 | 69 | @Override 70 | public void transformPage(View page, float position) { 71 | 72 | } 73 | 74 | @Override 75 | public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { 76 | int realCurrentPosition; 77 | int nextPosition; 78 | float baseElevation = mAdapter.getBaseElevation(); 79 | float realOffset; 80 | boolean goingLeft = mLastOffset > positionOffset; 81 | 82 | // If we're going backwards, onPageScrolled receives the last position 83 | // instead of the current one 84 | if (goingLeft) { 85 | realCurrentPosition = position + 1; 86 | nextPosition = position; 87 | realOffset = 1 - positionOffset; 88 | } else { 89 | nextPosition = position + 1; 90 | realCurrentPosition = position; 91 | realOffset = positionOffset; 92 | } 93 | 94 | // Avoid crash on overscroll 95 | if (nextPosition > mAdapter.getCount() - 1 96 | || realCurrentPosition > mAdapter.getCount() - 1) { 97 | return; 98 | } 99 | 100 | CardView currentCard = mAdapter.getCardViewAt(realCurrentPosition); 101 | 102 | // This might be null if a fragment is being used 103 | // and the views weren't created yet 104 | if (currentCard != null) { 105 | if (mScalingEnabled) { 106 | currentCard.setScaleX((float) (1 + 0.1 * (1 - realOffset))); 107 | currentCard.setScaleY((float) (1 + 0.1 * (1 - realOffset))); 108 | } 109 | currentCard.setCardElevation((baseElevation + baseElevation 110 | * (CardAdapter.MAX_ELEVATION_FACTOR - 1) * (1 - realOffset))); 111 | } 112 | 113 | CardView nextCard = mAdapter.getCardViewAt(nextPosition); 114 | 115 | // We might be scrolling fast enough so that the next (or previous) card 116 | // was already destroyed or a fragment might not have been created yet 117 | if (nextCard != null) { 118 | if (mScalingEnabled) { 119 | nextCard.setScaleX((float) (1 + 0.1 * (realOffset))); 120 | nextCard.setScaleY((float) (1 + 0.1 * (realOffset))); 121 | } 122 | nextCard.setCardElevation((baseElevation + baseElevation 123 | * (CardAdapter.MAX_ELEVATION_FACTOR - 1) * (realOffset))); 124 | } 125 | 126 | mLastOffset = positionOffset; 127 | } 128 | 129 | @Override 130 | public void onPageSelected(int position) { 131 | 132 | } 133 | 134 | @Override 135 | public void onPageScrollStateChanged(int state) { 136 | 137 | } 138 | } 139 | ``` 140 | ### 第三步：设置setAdapter： 141 | ``` 142 | public class CardFragmentPagerAdapter extends FragmentStatePagerAdapter implements CardAdapter { 143 | 144 | private List mFragments; 145 | private float mBaseElevation; 146 | 147 | public CardFragmentPagerAdapter(FragmentManager fm, float baseElevation) { 148 | super(fm); 149 | mFragments = new ArrayList<>(); 150 | mBaseElevation = baseElevation; 151 | 152 | for(int i = 0; i< 5; i++){ 153 | addCardFragment(new CardFragment()); 154 | } 155 | } 156 | 157 | @Override 158 | public float getBaseElevation() { 159 | return mBaseElevation; 160 | } 161 | 162 | @Override 163 | public CardView getCardViewAt(int position) { 164 | return mFragments.get(position).getCardView(); 165 | } 166 | 167 | @Override 168 | public int getCount() { 169 | return mFragments.size(); 170 | } 171 | 172 | @Override 173 | public Fragment getItem(int position) { 174 | return mFragments.get(position); 175 | } 176 | 177 | @Override 178 | public Object instantiateItem(ViewGroup container, int position) { 179 | Object fragment = super.instantiateItem(container, position); 180 | mFragments.set(position, (CardFragment) fragment); 181 | return fragment; 182 | } 183 | 184 | public void addCardFragment(CardFragment fragment) { 185 | mFragments.add(fragment); 186 | } 187 | 188 | } 189 | ``` 190 | ### 第四步：设置CardAdapter： 191 | ``` 192 | public interface CardAdapter { 193 | 194 | int MAX_ELEVATION_FACTOR = 8; 195 | 196 | float getBaseElevation(); 197 | 198 | CardView getCardViewAt(int position); 199 | 200 | int getCount(); 201 | } 202 | ``` 203 | ### 第五步：实现： 204 | ``` 205 | mViewPager.setAdapter(mFragmentCardAdapter); 206 | mViewPager.setPageTransformer(false, mFragmentCardShadowTransformer); 207 | ``` 208 | -------------------------------------------------------------------------------- /app/.gitignore: -------------------------------------------------------------------------------- 1 | /build 2 | -------------------------------------------------------------------------------- /app/build.gradle: -------------------------------------------------------------------------------- 1 | apply plugin: 'com.android.application' 2 | 3 | android { 4 | compileSdkVersion 25 5 | buildToolsVersion "25.0.2" 6 | 7 | defaultConfig { 8 | applicationId "com.github.rubensousa.viewpagercards" 9 | minSdkVersion 14 10 | targetSdkVersion 25 11 | versionCode 1 12 | versionName "1.0" 13 | } 14 | buildTypes { 15 | release { 16 | minifyEnabled false 17 | proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 18 | } 19 | } 20 | } 21 | 22 | dependencies { 23 | compile fileTree(dir: 'libs', include: ['*.jar']) 24 | testCompile 'junit:junit:4.12' 25 | compile 'com.android.support:design:25.0.0' 26 | compile 'com.android.support:appcompat-v7:25.0.0' 27 | compile 'com.android.support:cardview-v7:25.0.0' 28 | } 29 | -------------------------------------------------------------------------------- /app/proguard-rules.pro: -------------------------------------------------------------------------------- 1 | # Add project specific ProGuard rules here. 2 | # By default, the flags in this file are appended to flags specified 3 | # in /home/ruben/Android/Sdk/tools/proguard/proguard-android.txt 4 | # You can edit the include path and order by changing the proguardFiles 5 | # directive in build.gradle. 6 | # 7 | # For more details, see 8 | # http://developer.android.com/guide/developing/tools/proguard.html 9 | 10 | # Add any project specific keep options here: 11 | 12 | # If your project uses WebView with JS, uncomment the following 13 | # and specify the fully qualified class name to the JavaScript interface 14 | # class: 15 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview { 16 | # public *; 17 | #} 18 | -------------------------------------------------------------------------------- /app/src/androidTest/java/com/github/rubensousa/viewpagercards/ApplicationTest.java: -------------------------------------------------------------------------------- 1 | package com.github.rubensousa.viewpagercards; 2 | 3 | import android.app.Application; 4 | import android.test.ApplicationTestCase; 5 | 6 | /** 7 | * Testing Fundamentals 8 | */ 9 | public class ApplicationTest extends ApplicationTestCase { 10 | public ApplicationTest() { 11 | super(Application.class); 12 | } 13 | } -------------------------------------------------------------------------------- /app/src/main/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 2 | 4 | 5 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | -------------------------------------------------------------------------------- /app/src/main/java/com/github/rubensousa/viewpagercards/CardAdapter.java: -------------------------------------------------------------------------------- 1 | package com.github.rubensousa.viewpagercards; 2 | 3 | 4 | import android.support.v7.widget.CardView; 5 | 6 | public interface CardAdapter { 7 | 8 | int MAX_ELEVATION_FACTOR = 8; 9 | 10 | float getBaseElevation(); 11 | 12 | CardView getCardViewAt(int position); 13 | 14 | int getCount(); 15 | } 16 | -------------------------------------------------------------------------------- /app/src/main/java/com/github/rubensousa/viewpagercards/CardFragment.java: -------------------------------------------------------------------------------- 1 | package com.github.rubensousa.viewpagercards; 2 | 3 | import android.os.Bundle; 4 | import android.support.annotation.Nullable; 5 | import android.support.v4.app.Fragment; 6 | import android.support.v7.widget.CardView; 7 | import android.view.LayoutInflater; 8 | import android.view.View; 9 | import android.view.ViewGroup; 10 | 11 | 12 | public class CardFragment extends Fragment { 13 | 14 | private CardView mCardView; 15 | 16 | @Nullable 17 | @Override 18 | public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, 19 | @Nullable Bundle savedInstanceState) { 20 | View view = inflater.inflate(R.layout.fragment_adapter, container, false); 21 | mCardView = (CardView) view.findViewById(R.id.cardView); 22 | mCardView.setMaxCardElevation(mCardView.getCardElevation() 23 | * CardAdapter.MAX_ELEVATION_FACTOR); 24 | return view; 25 | } 26 | 27 | public CardView getCardView() { 28 | return mCardView; 29 | } 30 | } 31 | -------------------------------------------------------------------------------- /app/src/main/java/com/github/rubensousa/viewpagercards/CardFragmentPagerAdapter.java: -------------------------------------------------------------------------------- 1 | package com.github.rubensousa.viewpagercards; 2 | 3 | import android.support.v4.app.Fragment; 4 | import android.support.v4.app.FragmentManager; 5 | import android.support.v4.app.FragmentStatePagerAdapter; 6 | import android.support.v7.widget.CardView; 7 | import android.view.View; 8 | import android.view.ViewGroup; 9 | 10 | import java.util.ArrayList; 11 | import java.util.List; 12 | 13 | public class CardFragmentPagerAdapter extends FragmentStatePagerAdapter implements CardAdapter { 14 | 15 | private List mFragments; 16 | private float mBaseElevation; 17 | 18 | public CardFragmentPagerAdapter(FragmentManager fm, float baseElevation) { 19 | super(fm); 20 | mFragments = new ArrayList<>(); 21 | mBaseElevation = baseElevation; 22 | 23 | for(int i = 0; i< 5; i++){ 24 | addCardFragment(new CardFragment()); 25 | } 26 | } 27 | 28 | @Override 29 | public float getBaseElevation() { 30 | return mBaseElevation; 31 | } 32 | 33 | @Override 34 | public CardView getCardViewAt(int position) { 35 | return mFragments.get(position).getCardView(); 36 | } 37 | 38 | @Override 39 | public int getCount() { 40 | return mFragments.size(); 41 | } 42 | 43 | @Override 44 | public Fragment getItem(int position) { 45 | return mFragments.get(position); 46 | } 47 | 48 | @Override 49 | public Object instantiateItem(ViewGroup container, int position) { 50 | Object fragment = super.instantiateItem(container, position); 51 | mFragments.set(position, (CardFragment) fragment); 52 | return fragment; 53 | } 54 | 55 | public void addCardFragment(CardFragment fragment) { 56 | mFragments.add(fragment); 57 | } 58 | 59 | } 60 | -------------------------------------------------------------------------------- /app/src/main/java/com/github/rubensousa/viewpagercards/CardItem.java: -------------------------------------------------------------------------------- 1 | package com.github.rubensousa.viewpagercards; 2 | 3 | 4 | public class CardItem { 5 | 6 | private int mTextResource; 7 | private int mTitleResource; 8 | 9 | public CardItem(int title, int text) { 10 | mTitleResource = title; 11 | mTextResource = text; 12 | } 13 | 14 | public int getText() { 15 | return mTextResource; 16 | } 17 | 18 | public int getTitle() { 19 | return mTitleResource; 20 | } 21 | } 22 | -------------------------------------------------------------------------------- /app/src/main/java/com/github/rubensousa/viewpagercards/CardPagerAdapter.java: -------------------------------------------------------------------------------- 1 | package com.github.rubensousa.viewpagercards; 2 | 3 | import android.support.v4.view.PagerAdapter; 4 | import android.support.v7.widget.CardView; 5 | import android.view.LayoutInflater; 6 | import android.view.View; 7 | import android.view.ViewGroup; 8 | import android.widget.TextView; 9 | 10 | import java.util.ArrayList; 11 | import java.util.List; 12 | 13 | public class CardPagerAdapter extends PagerAdapter implements CardAdapter { 14 | 15 | private List mViews; 16 | private List mData; 17 | private float mBaseElevation; 18 | 19 | public CardPagerAdapter() { 20 | mData = new ArrayList<>(); 21 | mViews = new ArrayList<>(); 22 | } 23 | 24 | public void addCardItem(CardItem item) { 25 | mViews.add(null); 26 | mData.add(item); 27 | } 28 | 29 | public float getBaseElevation() { 30 | return mBaseElevation; 31 | } 32 | 33 | @Override 34 | public CardView getCardViewAt(int position) { 35 | return mViews.get(position); 36 | } 37 | 38 | @Override 39 | public int getCount() { 40 | return mData.size(); 41 | } 42 | 43 | @Override 44 | public boolean isViewFromObject(View view, Object object) { 45 | return view == object; 46 | } 47 | 48 | @Override 49 | public Object instantiateItem(ViewGroup container, int position) { 50 | View view = LayoutInflater.from(container.getContext()) 51 | .inflate(R.layout.adapter, container, false); 52 | container.addView(view); 53 | bind(mData.get(position), view); 54 | CardView cardView = (CardView) view.findViewById(R.id.cardView); 55 | 56 | if (mBaseElevation == 0) { 57 | mBaseElevation = cardView.getCardElevation(); 58 | } 59 | 60 | cardView.setMaxCardElevation(mBaseElevation * MAX_ELEVATION_FACTOR); 61 | mViews.set(position, cardView); 62 | return view; 63 | } 64 | 65 | @Override 66 | public void destroyItem(ViewGroup container, int position, Object object) { 67 | container.removeView((View) object); 68 | mViews.set(position, null); 69 | } 70 | 71 | private void bind(CardItem item, View view) { 72 | TextView titleTextView = (TextView) view.findViewById(R.id.titleTextView); 73 | TextView contentTextView = (TextView) view.findViewById(R.id.contentTextView); 74 | titleTextView.setText(item.getTitle()); 75 | contentTextView.setText(item.getText()); 76 | } 77 | 78 | } 79 | -------------------------------------------------------------------------------- /app/src/main/java/com/github/rubensousa/viewpagercards/MainActivity.java: -------------------------------------------------------------------------------- 1 | package com.github.rubensousa.viewpagercards; 2 | 3 | import android.content.Context; 4 | import android.support.v4.view.ViewPager; 5 | import android.support.v7.app.AppCompatActivity; 6 | import android.os.Bundle; 7 | import android.view.View; 8 | import android.widget.Button; 9 | import android.widget.CheckBox; 10 | import android.widget.CompoundButton; 11 | 12 | public class MainActivity extends AppCompatActivity implements View.OnClickListener, 13 | CompoundButton.OnCheckedChangeListener { 14 | 15 | private Button mButton; 16 | private ViewPager mViewPager; 17 | 18 | private CardPagerAdapter mCardAdapter; 19 | private ShadowTransformer mCardShadowTransformer; 20 | private CardFragmentPagerAdapter mFragmentCardAdapter; 21 | private ShadowTransformer mFragmentCardShadowTransformer; 22 | 23 | private boolean mShowingFragments = false; 24 | 25 | @Override 26 | protected void onCreate(Bundle savedInstanceState) { 27 | super.onCreate(savedInstanceState); 28 | setContentView(R.layout.activity_main); 29 | mViewPager = (ViewPager) findViewById(R.id.viewPager); 30 | mButton = (Button) findViewById(R.id.cardTypeBtn); 31 | ((CheckBox) findViewById(R.id.checkBox)).setOnCheckedChangeListener(this); 32 | mButton.setOnClickListener(this); 33 | 34 | mCardAdapter = new CardPagerAdapter(); 35 | mCardAdapter.addCardItem(new CardItem(R.string.title_1, R.string.text_1)); 36 | mCardAdapter.addCardItem(new CardItem(R.string.title_2, R.string.text_1)); 37 | mCardAdapter.addCardItem(new CardItem(R.string.title_3, R.string.text_1)); 38 | mCardAdapter.addCardItem(new CardItem(R.string.title_4, R.string.text_1)); 39 | mFragmentCardAdapter = new CardFragmentPagerAdapter(getSupportFragmentManager(), 40 | dpToPixels(2, this)); 41 | 42 | mCardShadowTransformer = new ShadowTransformer(mViewPager, mCardAdapter); 43 | mFragmentCardShadowTransformer = new ShadowTransformer(mViewPager, mFragmentCardAdapter); 44 | 45 | mViewPager.setAdapter(mCardAdapter); 46 | mViewPager.setPageTransformer(false, mCardShadowTransformer); 47 | mViewPager.setOffscreenPageLimit(3); 48 | } 49 | 50 | @Override 51 | public void onClick(View view) { 52 | if (!mShowingFragments) { 53 | mButton.setText("Views"); 54 | mViewPager.setAdapter(mFragmentCardAdapter); 55 | mViewPager.setPageTransformer(false, mFragmentCardShadowTransformer); 56 | } else { 57 | mButton.setText("Fragments"); 58 | mViewPager.setAdapter(mCardAdapter); 59 | mViewPager.setPageTransformer(false, mCardShadowTransformer); 60 | } 61 | 62 | mShowingFragments = !mShowingFragments; 63 | } 64 | 65 | public static float dpToPixels(int dp, Context context) { 66 | return dp * (context.getResources().getDisplayMetrics().density); 67 | } 68 | 69 | @Override 70 | public void onCheckedChanged(CompoundButton compoundButton, boolean b) { 71 | mCardShadowTransformer.enableScaling(b); 72 | mFragmentCardShadowTransformer.enableScaling(b); 73 | } 74 | } 75 | -------------------------------------------------------------------------------- /app/src/main/java/com/github/rubensousa/viewpagercards/ShadowTransformer.java: -------------------------------------------------------------------------------- 1 | package com.github.rubensousa.viewpagercards; 2 | 3 | import android.support.v4.view.ViewPager; 4 | import android.support.v7.widget.CardView; 5 | import android.view.View; 6 | 7 | 8 | public class ShadowTransformer implements ViewPager.OnPageChangeListener, ViewPager.PageTransformer { 9 | 10 | private ViewPager mViewPager; 11 | private CardAdapter mAdapter; 12 | private float mLastOffset; 13 | private boolean mScalingEnabled; 14 | 15 | public ShadowTransformer(ViewPager viewPager, CardAdapter adapter) { 16 | mViewPager = viewPager; 17 | viewPager.addOnPageChangeListener(this); 18 | mAdapter = adapter; 19 | } 20 | 21 | public void enableScaling(boolean enable) { 22 | if (mScalingEnabled && !enable) { 23 | // shrink main card 24 | CardView currentCard = mAdapter.getCardViewAt(mViewPager.getCurrentItem()); 25 | if (currentCard != null) { 26 | currentCard.animate().scaleY(1); 27 | currentCard.animate().scaleX(1); 28 | } 29 | }else if(!mScalingEnabled && enable){ 30 | // grow main card 31 | CardView currentCard = mAdapter.getCardViewAt(mViewPager.getCurrentItem()); 32 | if (currentCard != null) { 33 | currentCard.animate().scaleY(1.1f); 34 | currentCard.animate().scaleX(1.1f); 35 | } 36 | } 37 | 38 | mScalingEnabled = enable; 39 | } 40 | 41 | @Override 42 | public void transformPage(View page, float position) { 43 | 44 | } 45 | 46 | @Override 47 | public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { 48 | int realCurrentPosition; 49 | int nextPosition; 50 | float baseElevation = mAdapter.getBaseElevation(); 51 | float realOffset; 52 | boolean goingLeft = mLastOffset > positionOffset; 53 | 54 | // If we're going backwards, onPageScrolled receives the last position 55 | // instead of the current one 56 | if (goingLeft) { 57 | realCurrentPosition = position + 1; 58 | nextPosition = position; 59 | realOffset = 1 - positionOffset; 60 | } else { 61 | nextPosition = position + 1; 62 | realCurrentPosition = position; 63 | realOffset = positionOffset; 64 | } 65 | 66 | // Avoid crash on overscroll 67 | if (nextPosition > mAdapter.getCount() - 1 68 | || realCurrentPosition > mAdapter.getCount() - 1) { 69 | return; 70 | } 71 | 72 | CardView currentCard = mAdapter.getCardViewAt(realCurrentPosition); 73 | 74 | // This might be null if a fragment is being used 75 | // and the views weren't created yet 76 | if (currentCard != null) { 77 | if (mScalingEnabled) { 78 | currentCard.setScaleX((float) (1 + 0.1 * (1 - realOffset))); 79 | currentCard.setScaleY((float) (1 + 0.1 * (1 - realOffset))); 80 | } 81 | currentCard.setCardElevation((baseElevation + baseElevation 82 | * (CardAdapter.MAX_ELEVATION_FACTOR - 1) * (1 - realOffset))); 83 | } 84 | 85 | CardView nextCard = mAdapter.getCardViewAt(nextPosition); 86 | 87 | // We might be scrolling fast enough so that the next (or previous) card 88 | // was already destroyed or a fragment might not have been created yet 89 | if (nextCard != null) { 90 | if (mScalingEnabled) { 91 | nextCard.setScaleX((float) (1 + 0.1 * (realOffset))); 92 | nextCard.setScaleY((float) (1 + 0.1 * (realOffset))); 93 | } 94 | nextCard.setCardElevation((baseElevation + baseElevation 95 | * (CardAdapter.MAX_ELEVATION_FACTOR - 1) * (realOffset))); 96 | } 97 | 98 | mLastOffset = positionOffset; 99 | } 100 | 101 | @Override 102 | public void onPageSelected(int position) { 103 | 104 | } 105 | 106 | @Override 107 | public void onPageScrollStateChanged(int state) { 108 | 109 | } 110 | } 111 | -------------------------------------------------------------------------------- /app/src/main/res/drawable/ic_bookmark_24dp.xml: -------------------------------------------------------------------------------- 1 | 6 | 9 | 10 | -------------------------------------------------------------------------------- /app/src/main/res/layout-land/activity_main.xml: -------------------------------------------------------------------------------- 1 | 2 | 6 | 7 | 14 | 15 |