SwipeActionAdapter - The Mailbox-like Swipe gesture library

SwipeActionAdapter is a library that provides a simple API to create Mailbox-like action when swiping in a ListView. The idea is to make it simple enough to implement while still providing sufficient options to allow you to integrate it with the design of your application.

Support for Android 4.0 and up. It might work on lower API versions, but I haven't tested it and I don't intend to make any effort in that direction.

Feel free to fork or issue pull requests on github. Issues can be reported on the github issue tracker.

Setup

There are multiple options to add SwipeActionAdapter to your project:

• Grade
  Add it as a dependency to your

  build.gradle

  java
  dependencies {
  compile 'com.wdullaer:swipeactionadapter:2.0.0'
  }
  

• Jar File
  Download the jar file and add it to your project

• Build from source
  If you would like to get the most recent code in a jar, clone the project and run

  ./gradlew jar

  from the root folder. This will build a

  swipeactionadapter.jar

  in

  library/build/libs/

  .

You may also add the library as an Android Library to your project. All the library files live in

library

The library also uses some Java 8 features, which Android Studio will need to transpile. This requires the following stanza in your app's

build.gradle

groovy
 android {
   ...
   // Configure only for each module that uses Java 8
   // language features (either in its source code or
   // through dependencies).
   compileOptions {
     sourceCompatibility JavaVersion.VERSION_1_8
     targetCompatibility JavaVersion.VERSION_1_8
   }
 }

Creating your ListView with swipe actions

If you'd rather just start with a working example, clone the project and take a look.

For a basic implementation, you'll need to

1. Wrap the Adapter of your ListView with a SwipeActionAdapter
2. Create a background layout for each swipe direction you wish to act upon.
3. Implement the SwipeActionAdapter

Wrap the adapter of your ListView

The majority of this libraries functionality is provided through an adapter which wraps around the content

Adapter

ListView

ListView

SwipeActionAdapter

Activity

Fragments

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

// Create an Adapter for your content
String[] content = new String[20];
for (int i=0;i<20;i++) content[i] = "Row "+(i+1);
ArrayAdapter<string> stringAdapter = new ArrayAdapter<string>(
        this,
        R.layout.row_bg,
        R.id.text,
        new ArrayList<string>(Arrays.asList(content))
);

// Wrap your content in a SwipeActionAdapter
mAdapter = new SwipeActionAdapter(stringAdapter);

// Pass a reference of your ListView to the SwipeActionAdapter
mAdapter.setListView(getListView());

// Set the SwipeActionAdapter as the Adapter for your ListView
setListAdapter(mAdapter);
}

Create a background layout for each swipe direction

I'm just supplying an empty layout with a background for each direction. You should have a layout for at least

SwipeDirection.DIRECTION_NORMAL_LEFT

SwipeDirection.DIRECTION_NORMAL_RIGHT

onCreate

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

// Create an Adapter for your content
String[] content = new String[20];
for (int i=0;i<20;i++) content[i] = "Row "+(i+1);
ArrayAdapter<string> stringAdapter = new ArrayAdapter<string>(
        this,
        R.layout.row_bg,
        R.id.text,
        new ArrayList<string>(Arrays.asList(content))
);

// Wrap your content in a SwipeActionAdapter
mAdapter = new SwipeActionAdapter(stringAdapter);

// Pass a reference of your ListView to the SwipeActionAdapter
mAdapter.setListView(getListView());

// Set the SwipeActionAdapter as the Adapter for your ListView
setListAdapter(mAdapter);

// Set backgrounds for the swipe directions
mAdapter.addBackground(SwipeDirection.DIRECTION_FAR_LEFT,R.layout.row_bg_left_far)
        .addBackground(SwipeDirection.DIRECTION_NORMAL_LEFT,R.layout.row_bg_left)
        .addBackground(SwipeDirection.DIRECTION_FAR_RIGHT,R.layout.row_bg_right_far)
        .addBackground(SwipeDirection.DIRECTION_NORMAL_RIGHT,R.layout.row_bg_right);
}

Layout code

Implement the SwipeActionListener

The final thing to do is listen to swipe gestures. This is done by implementing the

SwipeActionListener

boolean hasActions(int position, SwipeDirection direction)

boolean shouldDismiss(int position, SwipeDirection direction)

ASyncThread

void onSwipe(int[] position, SwipeDirection[] direction)

You should pass a reference of your

SwipeActionListener

SwipeActionAdapter

Here's the final implementation of our example's

onCreate

// Create an Adapter for your content
String[] content = new String[20];
for (int i=0;i<20;i++) content[i] = "Row "+(i+1);
ArrayAdapter stringAdapter = new ArrayAdapter(
        this,
        R.layout.row_bg,
        R.id.text,
        new ArrayList(Arrays.asList(content))
);

// Wrap your content in a SwipeActionAdapter
mAdapter = new SwipeActionAdapter(stringAdapter);
// Pass a reference of your ListView to the SwipeActionAdapter
mAdapter.setListView(getListView());
// Set the SwipeActionAdapter as the Adapter for your ListView
setListAdapter(mAdapter);
// Set backgrounds for the swipe directions
mAdapter.addBackground(SwipeDirection.DIRECTION_FAR_LEFT,R.layout.row_bg_left_far)
        .addBackground(SwipeDirection.DIRECTION_NORMAL_LEFT,R.layout.row_bg_left)
        .addBackground(SwipeDirection.DIRECTION_FAR_RIGHT,R.layout.row_bg_right_far)
        .addBackground(SwipeDirection.DIRECTION_NORMAL_RIGHT,R.layout.row_bg_right);
// Listen to swipes
mAdapter.setSwipeActionListener(new SwipeActionListener(){
    @Override
    public boolean hasActions(int position, SwipeDirection direction){
        if(direction.isLeft()) return true; // Change this to false to disable left swipes
        if(direction.isRight()) return true;
        return false;
    }
@Override
public boolean shouldDismiss(int position, SwipeDirection direction){
    // Only dismiss an item when swiping normal left
    return direction == SwipeDirection.DIRECTION_NORMAL_LEFT;
}

@Override
public void onSwipe(int[] positionList, SwipeDirection[] directionList){
    for(int i=0;i<positionlist.length int direction="directionList[i];" position="positionList[i];" string dir="" switch case swipedirection.direction_far_left: break swipedirection.direction_normal_left: swipedirection.direction_far_right: swipedirection.direction_normal_right: alertdialog.builder builder="new" builder.settitle dialog swiped right toast.maketext this swipe action triggered on madapter.getitem toast.length_short madapter.notifydatasetchanged public void onswipestarted listview swipedirection user is swiping onswipeended stopped finger from the screen>
}
```

Additional Options

setFadeOut(boolean fadeOut)

Setting this to true will cause the ListView item to slowly fade out as it is being swiped.

setFixedBackgrounds(boolean fixedBackgrounds)

Setting this to true will make the backgrounds static behind the ListView item instead of sliding in from the side.

setDimBackgrounds(boolean dimBackgrounds)

Setting this to true will make the backgrounds appear dimmed before the normal swipe threshold is reached.

setNormalSwipeFraction(float normalSwipeFraction)

Allows you to set the fraction of the view width that must be swiped before it is counted as a normal swipe. The float must be between 0 and 1. 0 makes every swipe register, 1 effectively disables swipe.

setFarSwipeFraction(float farSwipeFraction)

Allows you to set the fraction of the view width that must be swiped before it is counted as a far swipe. The float must be between 0 and 1. 0 makes every swipe a far swipe, 1 effectively disables a far swipe.

onSwipeStarted and onSwipeEnded

You can use these events to execute code once the user starts or stops swiping in a listItem. This can be used to fix issues 
relating to other libraries hijacking touch events (for example; a SwipeRefreshLayout).
```
@Override
public void onSwipeStarted(ListView listView, int position, SwipeDirection direction) {
}

@Override
public void onSwipeEnded(ListView listView, int position, SwipeDirection direction) {
}
```

License
Copyright (c) 2014 Wouter Dullaert

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
   http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
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