├── .gitignore ├── LICENSE ├── README.md ├── build.gradle ├── proguard-rules.pro └── src ├── androidTest └── java │ └── com │ └── hiwhitley │ └── learning │ └── ApplicationTest.java ├── main ├── AndroidManifest.xml ├── java │ └── com │ │ └── hiwhitley │ │ └── learning │ │ ├── MainActivity.java │ │ ├── MyAdapter.java │ │ ├── MySnapHelper.java │ │ └── RecyclerItemClickListener.java └── res │ ├── drawable │ ├── ic_item1.jpg │ ├── ic_item2.jpg │ └── ic_item3.jpg │ ├── layout │ ├── activity_main.xml │ └── item_view_card.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-w820dp │ └── dimens.xml │ └── values │ ├── attrs.xml │ ├── colors.xml │ ├── dimens.xml │ ├── strings.xml │ └── styles.xml └── test └── java └── com └── hiwhitley └── learning └── ExampleUnitTest.java /.gitignore: -------------------------------------------------------------------------------- 1 | # Built application files 2 | *.apk 3 | *.ap_ 4 | 5 | # Files for the ART/Dalvik VM 6 | *.dex 7 | 8 | # Java class files 9 | *.class 10 | 11 | # Generated files 12 | bin/ 13 | gen/ 14 | out/ 15 | 16 | # Gradle files 17 | .gradle/ 18 | build/ 19 | 20 | # Local configuration file (sdk path, etc) 21 | local.properties 22 | 23 | # Proguard folder generated by Eclipse 24 | proguard/ 25 | 26 | # Log Files 27 | *.log 28 | 29 | # Android Studio Navigation editor temp files 30 | .navigation/ 31 | 32 | # Android Studio captures folder 33 | captures/ 34 | 35 | # Intellij 36 | *.iml 37 | .idea/workspace.xml 38 | 39 | # Keystore files 40 | *.jks 41 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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-------------------------------------------------------------------------------- 1 | # SnapHelperDemo -------------------------------------------------------------------------------- /build.gradle: -------------------------------------------------------------------------------- 1 | apply plugin: 'com.android.application' 2 | 3 | android { 4 | compileSdkVersion 24 5 | buildToolsVersion "23.0.1" 6 | 7 | defaultConfig { 8 | applicationId "com.hiwhitley.learning" 9 | minSdkVersion 15 10 | targetSdkVersion 24 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(include: ['*.jar'], dir: 'libs') 24 | testCompile 'junit:junit:4.12' 25 | compile 'com.android.support:appcompat-v7:24.+' 26 | compile 'com.android.support:recyclerview-v7:24.2.0' 27 | compile 'com.android.support:cardview-v7:24.2.0' 28 | } 29 | -------------------------------------------------------------------------------- /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 C:\adt-bundle-windows-x86_64-20140702\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 | -------------------------------------------------------------------------------- /src/androidTest/java/com/hiwhitley/learning/ApplicationTest.java: -------------------------------------------------------------------------------- 1 | package com.hiwhitley.learning; 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 | } -------------------------------------------------------------------------------- /src/main/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 2 | 4 | 5 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | -------------------------------------------------------------------------------- /src/main/java/com/hiwhitley/learning/MainActivity.java: -------------------------------------------------------------------------------- 1 | package com.hiwhitley.learning; 2 | 3 | import android.os.Bundle; 4 | import android.support.v7.app.AppCompatActivity; 5 | import android.support.v7.widget.LinearLayoutManager; 6 | import android.support.v7.widget.RecyclerView; 7 | import android.view.View; 8 | import android.widget.Toast; 9 | 10 | import java.util.ArrayList; 11 | import java.util.List; 12 | 13 | public class MainActivity extends AppCompatActivity { 14 | 15 | private RecyclerView mRecyclerView; 16 | private List mImagesList; 17 | 18 | @Override 19 | protected void onCreate(Bundle savedInstanceState) { 20 | super.onCreate(savedInstanceState); 21 | setContentView(R.layout.activity_main); 22 | initView(); 23 | } 24 | 25 | private void initView() { 26 | mImagesList = new ArrayList<>(); 27 | for (int i = 0; i < 3; i++) { 28 | mImagesList.add(R.drawable.ic_item1); 29 | mImagesList.add(R.drawable.ic_item2); 30 | mImagesList.add(R.drawable.ic_item3); 31 | } 32 | mRecyclerView = (RecyclerView) findViewById(R.id.rv_main); 33 | mRecyclerView.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, false)); 34 | mRecyclerView.setAdapter(new MyAdapter(mImagesList)); 35 | 36 | // LinearSnapHelper mLinearSnapHelper = new LinearSnapHelper(); 37 | // mLinearSnapHelper.attachToRecyclerView(mRecyclerView); 38 | 39 | mRecyclerView.addOnItemTouchListener(new RecyclerItemClickListener(mRecyclerView, new RecyclerItemClickListener.OnItemClickListener() { 40 | @Override 41 | public void onItemClick(View view, int position) { 42 | Toast.makeText(view.getContext(), "position" + position, Toast.LENGTH_SHORT).show(); 43 | } 44 | 45 | @Override 46 | public void onItemLongClick(View view, int position) { 47 | 48 | } 49 | })); 50 | 51 | MySnapHelper mMySnapHelper = new MySnapHelper(); 52 | mMySnapHelper.attachToRecyclerView(mRecyclerView); 53 | } 54 | } 55 | -------------------------------------------------------------------------------- /src/main/java/com/hiwhitley/learning/MyAdapter.java: -------------------------------------------------------------------------------- 1 | package com.hiwhitley.learning; 2 | 3 | import android.support.v7.widget.RecyclerView; 4 | import android.view.LayoutInflater; 5 | import android.view.View; 6 | import android.view.ViewGroup; 7 | import android.widget.ImageView; 8 | 9 | import java.util.List; 10 | 11 | /** 12 | * Created by hiwhitley on 2016/9/4. 13 | */ 14 | public class MyAdapter extends RecyclerView.Adapter{ 15 | private List mImages; 16 | 17 | public MyAdapter(List images){ 18 | this.mImages = images; 19 | } 20 | 21 | 22 | @Override 23 | public ItemViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 24 | View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_view_card, parent, false); 25 | return new ItemViewHolder(itemView); 26 | } 27 | 28 | @Override 29 | public void onBindViewHolder(final ItemViewHolder holder, final int position) { 30 | holder.mImageView.setImageResource(mImages.get(position)); 31 | } 32 | 33 | @Override 34 | public int getItemCount() { 35 | return mImages.size(); 36 | } 37 | 38 | public class ItemViewHolder extends RecyclerView.ViewHolder { 39 | private ImageView mImageView; 40 | public ItemViewHolder(View itemView) { 41 | super(itemView); 42 | mImageView = (ImageView) itemView.findViewById(R.id.imageView); 43 | } 44 | } 45 | } 46 | -------------------------------------------------------------------------------- /src/main/java/com/hiwhitley/learning/MySnapHelper.java: -------------------------------------------------------------------------------- 1 | package com.hiwhitley.learning; 2 | 3 | import android.support.annotation.NonNull; 4 | import android.support.annotation.Nullable; 5 | import android.support.v7.widget.LinearLayoutManager; 6 | import android.support.v7.widget.LinearSnapHelper; 7 | import android.support.v7.widget.OrientationHelper; 8 | import android.support.v7.widget.RecyclerView; 9 | import android.view.View; 10 | 11 | /** 12 | * Created by hiwhitley on 2016/9/4. 13 | */ 14 | public class MySnapHelper extends LinearSnapHelper { 15 | 16 | private OrientationHelper mHorizontalHelper; 17 | 18 | @Nullable 19 | @Override 20 | public int[] calculateDistanceToFinalSnap(RecyclerView.LayoutManager layoutManager, View targetView) { 21 | int[] out = new int[2]; 22 | if (layoutManager.canScrollHorizontally()) { 23 | out[0] = distanceToStart(targetView, getHorizontalHelper(layoutManager)); 24 | } else { 25 | out[0] = 0; 26 | } 27 | 28 | return out; 29 | } 30 | 31 | private int distanceToStart(View targetView, OrientationHelper helper) { 32 | return helper.getDecoratedStart(targetView) - helper.getStartAfterPadding(); 33 | } 34 | 35 | @Nullable 36 | @Override 37 | public View findSnapView(RecyclerView.LayoutManager layoutManager) { 38 | return findStartView(layoutManager, getHorizontalHelper(layoutManager)); 39 | } 40 | 41 | private View findStartView(RecyclerView.LayoutManager layoutManager, 42 | OrientationHelper helper) { 43 | 44 | if (layoutManager instanceof LinearLayoutManager) { 45 | int firstChild = ((LinearLayoutManager) layoutManager).findFirstVisibleItemPosition(); 46 | int lastChild = ((LinearLayoutManager) layoutManager).findLastVisibleItemPosition(); 47 | if (firstChild == RecyclerView.NO_POSITION) { 48 | return null; 49 | } 50 | if (lastChild == layoutManager.getItemCount() - 1) { 51 | return layoutManager.findViewByPosition(lastChild); 52 | } 53 | 54 | View child = layoutManager.findViewByPosition(firstChild); 55 | 56 | if (helper.getDecoratedEnd(child) >= helper.getDecoratedMeasurement(child) / 2 57 | && helper.getDecoratedEnd(child) > 0) { 58 | return child; 59 | } else { 60 | return layoutManager.findViewByPosition(firstChild + 1); 61 | } 62 | } 63 | 64 | return super.findSnapView(layoutManager); 65 | } 66 | 67 | 68 | private OrientationHelper getHorizontalHelper( 69 | @NonNull RecyclerView.LayoutManager layoutManager) { 70 | if (mHorizontalHelper == null) { 71 | mHorizontalHelper = OrientationHelper.createHorizontalHelper(layoutManager); 72 | } 73 | return mHorizontalHelper; 74 | } 75 | } 76 | -------------------------------------------------------------------------------- /src/main/java/com/hiwhitley/learning/RecyclerItemClickListener.java: -------------------------------------------------------------------------------- 1 | package com.hiwhitley.learning; 2 | 3 | import android.support.v7.widget.RecyclerView; 4 | import android.view.GestureDetector; 5 | import android.view.MotionEvent; 6 | import android.view.View; 7 | 8 | /** 9 | * Created by hiwhitley on 2016/9/5. 10 | */ 11 | public class RecyclerItemClickListener implements RecyclerView.OnItemTouchListener { 12 | 13 | private OnItemClickListener clickListener; 14 | private GestureDetector gestureDetector; 15 | 16 | public interface OnItemClickListener { 17 | /** 18 | * 点击时回调 19 | * 20 | * @param view 点击的View 21 | * @param position 点击的位置 22 | */ 23 | void onItemClick(View view, int position); 24 | 25 | /** 26 | * 长点击时回调 27 | * 28 | * @param view 点击的View 29 | * @param position 点击的位置 30 | */ 31 | void onItemLongClick(View view, int position); 32 | } 33 | 34 | public RecyclerItemClickListener(final RecyclerView recyclerView, 35 | OnItemClickListener listener) { 36 | this.clickListener = listener; 37 | gestureDetector = new GestureDetector(recyclerView.getContext(), 38 | new GestureDetector.SimpleOnGestureListener() { 39 | @Override 40 | public boolean onSingleTapUp(MotionEvent e) { 41 | return true; 42 | } 43 | 44 | @Override 45 | public void onLongPress(MotionEvent e) { 46 | View childView = recyclerView.findChildViewUnder(e.getX(), e.getY()); 47 | if (childView != null && clickListener != null) { 48 | clickListener.onItemLongClick(childView, 49 | recyclerView.getChildAdapterPosition(childView)); 50 | } 51 | } 52 | }); 53 | } 54 | 55 | @Override 56 | public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) { 57 | View childView = rv.findChildViewUnder(e.getX(), e.getY()); 58 | if (childView != null && clickListener != null && gestureDetector.onTouchEvent(e)) { 59 | clickListener.onItemClick(childView, rv.getChildAdapterPosition(childView)); 60 | return true; 61 | } 62 | return false; 63 | } 64 | 65 | @Override 66 | public void onTouchEvent(RecyclerView rv, MotionEvent e) { 67 | 68 | } 69 | 70 | @Override 71 | public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) { 72 | 73 | } 74 | } -------------------------------------------------------------------------------- /src/main/res/drawable/ic_item1.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hiwhitley/SnapHelperDemo/3e3e1e882093809bc2fe39b750c4f73d3e6b9fe2/src/main/res/drawable/ic_item1.jpg -------------------------------------------------------------------------------- /src/main/res/drawable/ic_item2.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hiwhitley/SnapHelperDemo/3e3e1e882093809bc2fe39b750c4f73d3e6b9fe2/src/main/res/drawable/ic_item2.jpg -------------------------------------------------------------------------------- /src/main/res/drawable/ic_item3.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hiwhitley/SnapHelperDemo/3e3e1e882093809bc2fe39b750c4f73d3e6b9fe2/src/main/res/drawable/ic_item3.jpg -------------------------------------------------------------------------------- /src/main/res/layout/activity_main.xml: -------------------------------------------------------------------------------- 1 | 2 | 7 | 8 | 13 | 14 | 15 | 16 | 17 | -------------------------------------------------------------------------------- /src/main/res/layout/item_view_card.xml: -------------------------------------------------------------------------------- 1 | 2 | 11 | 12 | 18 | 19 | -------------------------------------------------------------------------------- /src/main/res/mipmap-hdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hiwhitley/SnapHelperDemo/3e3e1e882093809bc2fe39b750c4f73d3e6b9fe2/src/main/res/mipmap-hdpi/ic_launcher.png -------------------------------------------------------------------------------- /src/main/res/mipmap-mdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hiwhitley/SnapHelperDemo/3e3e1e882093809bc2fe39b750c4f73d3e6b9fe2/src/main/res/mipmap-mdpi/ic_launcher.png -------------------------------------------------------------------------------- /src/main/res/mipmap-xhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hiwhitley/SnapHelperDemo/3e3e1e882093809bc2fe39b750c4f73d3e6b9fe2/src/main/res/mipmap-xhdpi/ic_launcher.png -------------------------------------------------------------------------------- /src/main/res/mipmap-xxhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hiwhitley/SnapHelperDemo/3e3e1e882093809bc2fe39b750c4f73d3e6b9fe2/src/main/res/mipmap-xxhdpi/ic_launcher.png -------------------------------------------------------------------------------- /src/main/res/mipmap-xxxhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hiwhitley/SnapHelperDemo/3e3e1e882093809bc2fe39b750c4f73d3e6b9fe2/src/main/res/mipmap-xxxhdpi/ic_launcher.png -------------------------------------------------------------------------------- /src/main/res/values-w820dp/dimens.xml: -------------------------------------------------------------------------------- 1 | 2 | 5 | 64dp 6 | 7 | -------------------------------------------------------------------------------- /src/main/res/values/attrs.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | true 4 | 5 | -------------------------------------------------------------------------------- /src/main/res/values/colors.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | #3F51B5 4 | #303F9F 5 | #FF4081 6 | 7 | -------------------------------------------------------------------------------- /src/main/res/values/dimens.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 16dp 4 | 16dp 5 | 6 | -------------------------------------------------------------------------------- /src/main/res/values/strings.xml: -------------------------------------------------------------------------------- 1 | 2 | Learning 3 | 4 | -------------------------------------------------------------------------------- /src/main/res/values/styles.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 10 | 11 | 12 | -------------------------------------------------------------------------------- /src/test/java/com/hiwhitley/learning/ExampleUnitTest.java: -------------------------------------------------------------------------------- 1 | package com.hiwhitley.learning; 2 | 3 | import org.junit.Test; 4 | 5 | import static org.junit.Assert.*; 6 | 7 | /** 8 | * To work on unit tests, switch the Test Artifact in the Build Variants view. 9 | */ 10 | public class ExampleUnitTest { 11 | @Test 12 | public void addition_isCorrect() throws Exception { 13 | assertEquals(4, 2 + 2); 14 | } 15 | } --------------------------------------------------------------------------------