2017.9.25号，添加指示器，目前支持圆形和线形

README.md

@@ -8,6 +8,10 @@ A powerful tools to impl grid paging layout by RecyclerView
 
 ![](screenshot/recyclerview.gif)
 
+带有Indicator的
+
+![](screenshot/recyclerview_indicator.gif)
+
 # Download
 
 ## JitPack
@@ -77,6 +81,24 @@ dataList = GridPagerUtils.transformAndFillEmptyData(
 //setAdapter
 RecyclerViewAdapter adapter = new RecyclerViewAdapter(this, dataList, itemWidth);
 recyclerView.setAdapter(adapter);
+
+//indicator
+CirclePageIndicator indicator = (CirclePageIndicator) findViewById(R.id.first_page_indicator);
+indicator.setRecyclerView(firstRV);
+//Note: pageColumn must be config
+indicator.setPageColumn(column);
+
+indicator.setOnPageChangeListener(new OnPageChangeListener() {
+    @Override
+    public void onPageSelected(int position) {
+
+    }
+
+    @Override
+    public void onPageScrollStateChanged(int state) {
+
+    }
+});
 ```
 
 **Step 1. setLayoutManager:**

app/build.gradle

@@ -39,4 +39,5 @@ dependencies {
 
 //    compile 'com.hhl:gridpagersnaphelper:0.0.3'
 
+    compile project(':recyclerviewindicator')
 }

app/src/main/java/com/hhl/gridpagersanphelper/recyclerview/RecyclerViewActivity.java

@@ -12,16 +12,16 @@
 import com.hhl.gridpagersnaphelper.GridPagerSnapHelper;
 import com.hhl.gridpagersnaphelper.GridPagerUtils;
 import com.hhl.gridpagersnaphelper.transform.OneRowDataTransform;
-import com.hhl.gridpagersnaphelper.transform.TwoRowDataTransform;
 import com.hhl.gridpagersnaphelper.transform.ThreeRowDataTransform;
+import com.hhl.gridpagersnaphelper.transform.TwoRowDataTransform;
+import com.hhl.recyclerviewindicator.CirclePageIndicator;
+import com.hhl.recyclerviewindicator.LinePageIndicator;
+import com.hhl.recyclerviewindicator.OnPageChangeListener;
 
 import java.util.List;
 
 public class RecyclerViewActivity extends AppCompatActivity {
 
-    public static final int ROW = 1;
-    public static final int COLUMN = 5;
-
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -33,17 +33,17 @@ protected void onCreate(Bundle savedInstanceState) {
     }
 
     private void configThridRecyclerView(int row, int column) {
-        RecyclerView firstRV = (RecyclerView) findViewById(R.id.recycler_view_third);
-        firstRV.setHasFixedSize(true);
+        RecyclerView thridRV = (RecyclerView) findViewById(R.id.recycler_view_third);
+        thridRV.setHasFixedSize(true);
 
         //setLayoutManager
         GridLayoutManager gridLayoutManager = new GridLayoutManager(this, row, LinearLayoutManager.HORIZONTAL, false);
-        firstRV.setLayoutManager(gridLayoutManager);
+        thridRV.setLayoutManager(gridLayoutManager);
 
         //attachToRecyclerView
         GridPagerSnapHelper gridPagerSnapHelper = new GridPagerSnapHelper();
         gridPagerSnapHelper.setRow(row).setColumn(column);
-        gridPagerSnapHelper.attachToRecyclerView(firstRV);
+        gridPagerSnapHelper.attachToRecyclerView(thridRV);
 
         int screenWidth = ScreenUtils.getScreenWidth(this);
         int itemWidth = screenWidth / column;
@@ -55,21 +55,39 @@ private void configThridRecyclerView(int row, int column) {
 
         //setAdapter
         RecyclerViewAdapter adapter = new RecyclerViewAdapter(this, dataList, itemWidth);
-        firstRV.setAdapter(adapter);
+        thridRV.setAdapter(adapter);
+
+        //indicator
+        LinePageIndicator indicator = (LinePageIndicator) findViewById(R.id.third_page_indicator);
+        indicator.setRecyclerView(thridRV);
+        //Note: pageColumn must be config
+        indicator.setPageColumn(column);
+
+        indicator.setOnPageChangeListener(new OnPageChangeListener() {
+            @Override
+            public void onPageSelected(int position) {
+
+            }
+
+            @Override
+            public void onPageScrollStateChanged(int state) {
+
+            }
+        });
     }
 
     private void configSecondRecyclerView(int row, int column) {
-        RecyclerView firstRV = (RecyclerView) findViewById(R.id.recycler_view_second);
-        firstRV.setHasFixedSize(true);
+        RecyclerView secondRV = (RecyclerView) findViewById(R.id.recycler_view_second);
+        secondRV.setHasFixedSize(true);
 
         //setLayoutManager
         GridLayoutManager gridLayoutManager = new GridLayoutManager(this, row, LinearLayoutManager.HORIZONTAL, false);
-        firstRV.setLayoutManager(gridLayoutManager);
+        secondRV.setLayoutManager(gridLayoutManager);
 
         //attachToRecyclerView
         GridPagerSnapHelper gridPagerSnapHelper = new GridPagerSnapHelper();
         gridPagerSnapHelper.setRow(row).setColumn(column);
-        gridPagerSnapHelper.attachToRecyclerView(firstRV);
+        gridPagerSnapHelper.attachToRecyclerView(secondRV);
 
         int screenWidth = ScreenUtils.getScreenWidth(this);
         int itemWidth = screenWidth / column;
@@ -81,7 +99,25 @@ private void configSecondRecyclerView(int row, int column) {
 
         //setAdapter
         RecyclerViewAdapter adapter = new RecyclerViewAdapter(this, dataList, itemWidth);
-        firstRV.setAdapter(adapter);
+        secondRV.setAdapter(adapter);
+
+        //indicator
+        LinePageIndicator indicator = (LinePageIndicator) findViewById(R.id.second_page_indicator);
+        indicator.setRecyclerView(secondRV);
+        //Note: pageColumn must be config
+        indicator.setPageColumn(column);
+
+        indicator.setOnPageChangeListener(new OnPageChangeListener() {
+            @Override
+            public void onPageSelected(int position) {
+
+            }
+
+            @Override
+            public void onPageScrollStateChanged(int state) {
+
+            }
+        });
     }
 
     private void configFirstRecyclerView(int row, int column) {
@@ -108,5 +144,23 @@ private void configFirstRecyclerView(int row, int column) {
         //setAdapter
         RecyclerViewAdapter adapter = new RecyclerViewAdapter(this, dataList, itemWidth);
         firstRV.setAdapter(adapter);
+
+        //indicator
+        CirclePageIndicator indicator = (CirclePageIndicator) findViewById(R.id.first_page_indicator);
+        indicator.setRecyclerView(firstRV);
+        //Note: pageColumn must be config
+        indicator.setPageColumn(column);
+
+        indicator.setOnPageChangeListener(new OnPageChangeListener() {
+            @Override
+            public void onPageSelected(int position) {
+
+            }
+
+            @Override
+            public void onPageScrollStateChanged(int state) {
+
+            }
+        });
     }
 }

app/src/main/res/layout/activity_recycler_view.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
@@ -17,18 +18,43 @@
             android:layout_height="wrap_content"
             android:layout_marginTop="20dp" />
 
+        <com.hhl.recyclerviewindicator.CirclePageIndicator
+            android:id="@+id/first_page_indicator"
+            android:layout_width="match_parent"
+            android:layout_height="30dp"
+            android:layout_marginTop="10dp"
+            android:paddingBottom="5dp"
+            android:paddingTop="5dp"
+            app:fillColor="@color/colorPrimary" />
+
         <android.support.v7.widget.RecyclerView
             android:id="@+id/recycler_view_second"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:layout_marginTop="20dp" />
 
+        <com.hhl.recyclerviewindicator.LinePageIndicator
+            android:id="@+id/second_page_indicator"
+            android:layout_width="match_parent"
+            android:layout_height="30dp"
+            android:layout_marginTop="10dp"
+            app:selectedColor="@color/colorAccent" />
+
         <android.support.v7.widget.RecyclerView
             android:id="@+id/recycler_view_third"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:layout_marginTop="20dp" />
 
+        <com.hhl.recyclerviewindicator.LinePageIndicator
+            android:id="@+id/third_page_indicator"
+            android:layout_width="match_parent"
+            android:layout_height="30dp"
+            android:layout_marginTop="10dp"
+            android:paddingBottom="5dp"
+            android:paddingTop="5dp"
+            app:selectedColor="@color/colorAccent" />
+
     </LinearLayout>
 
 </ScrollView>

recyclerviewindicator/.gitignore

@@ -0,0 +1 @@
+/build

recyclerviewindicator/build.gradle

@@ -0,0 +1,33 @@
+apply plugin: 'com.android.library'
+
+android {
+    compileSdkVersion 25
+    buildToolsVersion "26.0.1"
+
+    defaultConfig {
+        minSdkVersion 14
+        targetSdkVersion 25
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    compile fileTree(dir: 'libs', include: ['*.jar'])
+    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
+        exclude group: 'com.android.support', module: 'support-annotations'
+    })
+    compile 'com.android.support:appcompat-v7:25.3.1'
+    testCompile 'junit:junit:4.12'
+
+    compile 'com.android.support:recyclerview-v7:25.3.1'
+}

recyclerviewindicator/proguard-rules.pro

@@ -0,0 +1,25 @@
+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in /Users/HanHailong/Library/Android/sdk/tools/proguard/proguard-android.txt
+# You can edit the include path and order by changing the proguardFiles
+# directive in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# Add any project specific keep options here:
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

recyclerviewindicator/src/androidTest/java/com/hhl/recyclerviewindicator/ExampleInstrumentedTest.java

@@ -0,0 +1,26 @@
+package com.hhl.recyclerviewindicator;
+
+import android.content.Context;
+import android.support.test.InstrumentationRegistry;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumentation test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() throws Exception {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getTargetContext();
+
+        assertEquals("com.hhl.recyclerviewindicator.test", appContext.getPackageName());
+    }
+}

recyclerviewindicator/src/main/AndroidManifest.xml

@@ -0,0 +1,10 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+
+    package="com.hhl.recyclerviewindicator">
+
+    <application android:allowBackup="true" android:label="@string/app_name"
+        android:supportsRtl="true">
+
+    </application>
+
+</manifest>