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iPaulProiPaulPro
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Basic drag-and-drop and swipe-to-dismiss with ItemTouchHelper
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‎.gitignore

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# ndk generated files
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**/obj/
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# built application files
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*.apk
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*.ap_
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# lint files
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lint.xml
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# files for the dex VM
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*.dex
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# Java class files
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*.class
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# generated files
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bin/
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gen/
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classes/
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gen-external-apklibs/
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# maven output folder
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target
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# Local configuration file (sdk path, etc)
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local.properties
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# Eclipse project files
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.classpath
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.project
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.metadata
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.settings
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# IntelliJ files
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.idea
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*.iml
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# OSX files
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.DS_Store
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# Windows files
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Thumbs.db
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# vi swap files
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*.swp
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# backup files
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*.bak
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com_crashlytics_export_strings.xml
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# Gradle files
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.gradle
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/build
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/captures

‎app/.gitignore

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/build

‎app/build.gradle

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apply plugin: 'com.android.application'
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android {
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compileSdkVersion 22
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buildToolsVersion "22.0.1"
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defaultConfig {
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applicationId "co.paulburke.android.itemtouchhelperdemo"
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minSdkVersion 16
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targetSdkVersion 22
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versionCode 1
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versionName "1.0"
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}
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}
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dependencies {
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compile fileTree(dir: 'libs', include: ['*.jar'])
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compile 'com.android.support:appcompat-v7:22.2.0'
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compile 'com.android.support:recyclerview-v7:22.2.0'
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}

‎app/proguard-rules.pro

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# Add project specific ProGuard rules here.
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# By default, the flags in this file are appended to flags specified
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# in /Users/paulburke/Sites/android-sdk/tools/proguard/proguard-android.txt
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# You can edit the include path and order by changing the proguardFiles
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# directive in build.gradle.
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#
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# For more details, see
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# http://developer.android.com/guide/developing/tools/proguard.html
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# Add any project specific keep options here:
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# If your project uses WebView with JS, uncomment the following
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# and specify the fully qualified class name to the JavaScript interface
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# class:
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#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
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# public *;
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#}

‎app/src/androidTest/java/co/paulburke/android/itemtouchhelperdemo/ApplicationTest.java

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package co.paulburke.android.itemtouchhelperdemo;
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import android.app.Application;
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import android.test.ApplicationTestCase;
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/**
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* <a href="http://d.android.com/tools/testing/testing_android.html">Testing Fundamentals</a>
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*/
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public class ApplicationTest extends ApplicationTestCase<Application> {
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public ApplicationTest() {
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super(Application.class);
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}
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}

‎app/src/main/AndroidManifest.xml

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<?xml version="1.0" encoding="utf-8"?>
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
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package="co.paulburke.android.itemtouchhelperdemo" >
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<application
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android:allowBackup="true"
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android:icon="@mipmap/ic_launcher"
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android:label="@string/app_name"
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android:theme="@style/AppTheme" >
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<activity
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android:name=".MainActivity"
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android:label="@string/app_name" >
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<intent-filter>
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<action android:name="android.intent.action.MAIN" />
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<category android:name="android.intent.category.LAUNCHER" />
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</intent-filter>
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</activity>
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</application>
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</manifest>

‎app/src/main/java/co/paulburke/android/itemtouchhelperdemo/MainActivity.java

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package co.paulburke.android.itemtouchhelperdemo;
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import android.os.Bundle;
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import android.support.v7.app.ActionBarActivity;
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import android.support.v7.widget.Toolbar;
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/**
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* @author Paul Burke (ipaulpro)
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*/
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public class MainActivity extends ActionBarActivity {
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_main);
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setSupportActionBar((Toolbar) findViewById(R.id.toolbar));
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}
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}

‎app/src/main/java/co/paulburke/android/itemtouchhelperdemo/RecyclerListAdapter.java

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package co.paulburke.android.itemtouchhelperdemo;
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import android.graphics.Color;
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import android.support.v7.widget.RecyclerView;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.ViewGroup;
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import android.widget.TextView;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.List;
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import co.paulburke.android.itemtouchhelperdemo.helper.ItemTouchHelperAdapter;
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import co.paulburke.android.itemtouchhelperdemo.helper.ItemTouchHelperViewHolder;
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/**
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* @author Paul Burke (ipaulpro)
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*/
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public class RecyclerListAdapter extends RecyclerView.Adapter<RecyclerListAdapter.ItemViewHolder>
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implements ItemTouchHelperAdapter {
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private static final String[] STRINGS = new String[]{
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"One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine", "Ten"
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};
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private final List<String> mItems = new ArrayList<>();
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public RecyclerListAdapter() {
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mItems.addAll(Arrays.asList(STRINGS));
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}
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@Override
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public ItemViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
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View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_main, parent, false);
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ItemViewHolder itemViewHolder = new ItemViewHolder(view);
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return itemViewHolder;
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}
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@Override
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public void onBindViewHolder(final ItemViewHolder holder, int position) {
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holder.textView.setText(mItems.get(position));
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}
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@Override
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public void onItemDismiss(int position) {
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mItems.remove(position);
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notifyItemRemoved(position);
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}
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@Override
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public void onItemMove(int fromPosition, int toPosition) {
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String prev = mItems.remove(fromPosition);
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mItems.add(toPosition > fromPosition ? toPosition - 1 : toPosition, prev);
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notifyItemMoved(fromPosition, toPosition);
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}
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@Override
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public int getItemCount() {
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return mItems.size();
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}
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public static class ItemViewHolder extends RecyclerView.ViewHolder implements
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ItemTouchHelperViewHolder {
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public final TextView textView;
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public ItemViewHolder(View itemView) {
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super(itemView);
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textView = (TextView) itemView;
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}
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@Override
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public void onItemSelected() {
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itemView.setBackgroundColor(Color.LTGRAY);
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}
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@Override
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public void onItemClear() {
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itemView.setBackgroundColor(0);
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}
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}
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}

‎app/src/main/java/co/paulburke/android/itemtouchhelperdemo/RecyclerListFragment.java

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package co.paulburke.android.itemtouchhelperdemo;
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import android.os.Bundle;
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import android.support.annotation.Nullable;
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import android.support.v4.app.Fragment;
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import android.support.v7.widget.LinearLayoutManager;
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import android.support.v7.widget.RecyclerView;
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import android.support.v7.widget.helper.ItemTouchHelper;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.ViewGroup;
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import co.paulburke.android.itemtouchhelperdemo.helper.SimpleItemTouchHelperCallback;
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/**
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* @author Paul Burke (ipaulpro)
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*/
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public class RecyclerListFragment extends Fragment {
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private ItemTouchHelper mItemTouchHelper;
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public RecyclerListFragment() {
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}
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@Nullable
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@Override
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public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
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return inflater.inflate(R.layout.fragment_main, container, false);
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}
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@Override
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public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
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super.onViewCreated(view, savedInstanceState);
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RecyclerListAdapter adapter = new RecyclerListAdapter();
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RecyclerView recyclerView = (RecyclerView) view.findViewById(R.id.recycler_view);
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recyclerView.setHasFixedSize(true);
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recyclerView.setAdapter(adapter);
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recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
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ItemTouchHelper.Callback callback = new SimpleItemTouchHelperCallback(adapter);
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mItemTouchHelper = new ItemTouchHelper(callback);
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mItemTouchHelper.attachToRecyclerView(recyclerView);
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}
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}

‎app/src/main/java/co/paulburke/android/itemtouchhelperdemo/helper/ItemTouchHelperAdapter.java

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package co.paulburke.android.itemtouchhelperdemo.helper;
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import android.support.v7.widget.RecyclerView;
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/**
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* Interface to notify a {@link RecyclerView.Adapter} of moving and dismissal event from a {@link
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* android.support.v7.widget.helper.ItemTouchHelper.Callback}.
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*
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* @author Paul Burke (ipaulpro)
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*/
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public interface ItemTouchHelperAdapter {
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/**
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* Called when an item has been dragged far enough to trigger a move. This is called every time
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* an item is shifted, and not at the end of a "drop" event.
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*
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* @param fromPosition The start position of the moved item.
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* @param toPosition Then end position of the moved item.
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* @see RecyclerView#getAdapterPositionFor(RecyclerView.ViewHolder)
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* @see RecyclerView.ViewHolder#getAdapterPosition()
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*/
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void onItemMove(int fromPosition, int toPosition);
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/**
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* Called when an item has been dismissed by a swipe.
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*
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* @param position The position of the item dismissed.
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* @see RecyclerView#getAdapterPositionFor(RecyclerView.ViewHolder)
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* @see RecyclerView.ViewHolder#getAdapterPosition()
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*/
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void onItemDismiss(int position);
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}

‎app/src/main/java/co/paulburke/android/itemtouchhelperdemo/helper/ItemTouchHelperViewHolder.java

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package co.paulburke.android.itemtouchhelperdemo.helper;
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import android.support.v7.widget.helper.ItemTouchHelper;
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/**
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* Interface to notify an item ViewHolder of relevant callbacks from {@link
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* android.support.v7.widget.helper.ItemTouchHelper.Callback}.
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*
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* @author Paul Burke (ipaulpro)
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*/
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public interface ItemTouchHelperViewHolder {
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/**
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* Called when the {@link ItemTouchHelper} first registers an item as being moved or swiped.
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* Implementations should update the item view to indicate it's active state.
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*/
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void onItemSelected();
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/**
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* Called when the {@link ItemTouchHelper} has completed the move or swipe, and the active item
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* state should be cleared.
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*/
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void onItemClear();
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}

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