BoardView

Additional

Language
Java
Version
1.3.3 (Jun 13, 2017)
Created
Jun 13, 2017
Updated
Jun 24, 2018
Owner
Jacob Bonk (jakebonk)
Contributor
Jacob Bonk (jakebonk)
1
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Blurb

BoardView

BoardView is a custom view that allows you to be able to re-order items in a list as well as in a board. You can drag and drop items between columns as well as drag and drop columns.

Example

Download library with Jitpack.io

Add this to your build.gradle file for your app.

 allprojects {
  repositories {
   ...
   maven { url 'https://jitpack.io' }
  }
 }

Add this to your dependencies in build.gradle for your project.

 dependencies {
         implementation 'com.github.jakebonk:BoardView:1.3.3'
 }

Usage

BoardView utilizes a BoardAdapter, SimpleBoardAdapter is an example of how to extend BoardAdapter.

 BoardView boardView = (BoardView)findViewById(R.id.boardview);
 ArrayList<SimpleBoardAdapter.SimpleColumn> data = new ArrayList<>();
        ArrayList<String> list = new ArrayList<String>();
        list.add("Item 1");
        list.add("Item 2");
        list.add("Item 3");
        list.add("Item 4");
        data.add(new SimpleBoardAdapter.SimpleColumn("Column 1",list));
        data.add(new SimpleBoardAdapter.SimpleColumn("Column 2",list));
        data.add(new SimpleBoardAdapter.SimpleColumn("Column 3",list));
        data.add(new SimpleBoardAdapter.SimpleColumn("Column 4",list));
        data.add(new SimpleBoardAdapter.SimpleColumn("Column 5",list));
        SimpleBoardAdapter boardAdapter = new SimpleBoardAdapter(this,data);
        boardView.setAdapter(boardAdapter);

To manipulate the BoardView simply call one of the new functions in BoardAdapter

void removeColumn(int index)
void removeItem(int column, int index)
void addItem(int column,int index, Object item)
void addColumn(int index, Column column)

I also added the ability to set Transition animations when adding items/columns.

 void SetColumnTransition(Transition t)
 void SetItemTransition(Transition t)

There are two types of drag listeners, the first is for columns

  boardView.setOnDragColumnListener(new BoardView.DragColumnStartCallback() {
            @Override
            public void startDrag(View view, int startColumnPos) {

            }

            @Override
            public void changedPosition(View view, int startColumnPos, int newColumnPos) {

            }
     
     @Override
            public void dragging(View itemView, MotionEvent event) {
                
            }

            @Override
            public void endDrag(View view, int startColumnPos, int endColumnPos) {

            }
        });

Similarly we can get the drag listener for items

  boardView.setOnDragItemListener(new BoardView.DragItemStartCallback() {
            @Override
            public void startDrag(View view, int startItemPos, int startColumnPos) {

            }

            @Override
            public void changedPosition(View view, int startItemPos, int startColumnPos, int newItemPos, int newColumnPos) {

            }
     
      @Override
            public void dragging(View itemView, MotionEvent event) {
     
            }

            @Override
            public void endDrag(View view, int startItemPos, int startColumnPos, int endItemPos, int endColumnPos) {

            }
        });

There is also a listener for when the BoardView has finished creating and assigning its views.

  boardView.setOnDoneListener(new BoardView.DoneListener() {
            @Override
            public void onDone() {
                Log.e("ee","Done");
            }
        });

This is how to set the click listener for a item, header and footer, which gives their respective positions.

 
 boardView.setOnItemClickListener(new BoardView.ItemClickListener() {
            @Override
            public void onClick(View v, int column_pos, int item_pos) {
                
            }
        });
        boardView.setOnHeaderClickListener(new BoardView.HeaderClickListener() {
            @Override
            public void onClick(View v, int column_pos) {
                
            }
        }); 
 boardView.setOnFooterClickListener(new BoardView.FooterClickListener() {
            @Override
            public void onClick(View v, int column_pos) {
     
            }
        });

By setting SetColumnSnap you can allow the BoardView to snap to the closest column when scrolling, this is activated by default. To set it back to normal just set it to false

boardView.SetColumnSnap(true);
 
 or
 
boardView.SetColumnSnap(false);

Creating your own BoardAdapter

Creating a custom BoardAdapter is pretty similar to that of a BaseAdapter, the main focus being to create some type of object that help you create your custom views for both headers and items. The adapter also has two new abstract methods called, isColumnLocked when true prevents the column from being draggable. isItemLocked will not allow item to be dragged to or from this column.

 @Override
 public boolean isColumnLocked(int column_position) {
  return false;
 }

 @Override
 public boolean isItemLocked(int column_position) {  
  return false;
 }

You can also set the maximum amount of items you want in a list. If -1 is returned then there will be no cap otherwise the returned value will be the cap. The example below allow only 4 items inside any given column.

@Override
    public int maxItemCount(int column_position) {
        return 4;
    }

Things to fix

There is a scaling issue when the column is beginning dragging or has ended dragging. I know this is an issue but I don't know of a good way to solve this at the moment. I eventually will fix it but for now I'm putting it on the back burners.