justasm/ DragLinearLayout

(v1.1.0) over 6 years ago

Java

Need help with DragLinearLayout?

Click the “chat” button below for chat support from the developer who created it, or find similar developers for support.

About the developer

justasm

440 Stars

116 Forks

MIT License

60 Commits

17 Opened issues

Description

Android LinearLayout with drag and drop to reorder.

Services available

Need anything else?

Contributors list

Justas Medeišis justasm

# 143,059

bottom-...

macOS

vector-...

Objecti...

48 commits

Dawid Drozd gelldur

# 185,001

Shell

proguar...

eventbu...

cpp17

3 commits

xuxu xuxucode

# 72,410

PHP

Node.js

Koa

Java

2 commits

Readme

DragLinearLayout

Name: DragLinearLayout
Brand: DragLinearLayout
SKU: //justasm/DragLinearLayout
Rating: 2.85 (440 reviews)

An Android

LinearLayout

that supports draggable and swappable child

View

Why?

Why bother doing drag & swap in a

LinearLayout

when there are so many solutions for

ListView

Simplicity - no need for
```
ListAdapter
```
s. By default, works like a
```
LinearLayout
```
.
Flexibility - supports heterogeneous, selectively draggable (or not draggable), children.
Portability - can be used in any layout, e.g. as a child in a
```
ScrollView
```
container.

Usage

Add it to your project using Gradle:

compile 'com.jmedeisis:draglinearlayout:1.1.0'

The

DragLinearLayout

can be used in place of any

LinearLayout

. However, by default, children will not be draggable. To set an existing

View

as draggable, use

DragLinearLayout#setViewDraggable(View, View)

, passing in the child

View

and a (non-null!)

View

that will act as the handle for dragging it (this can be the

View

itself).

XML layout file:

<textview android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/text"></textview>

<imageview android:layout_width="match_parent" android:layout_height="120dp" android:scaletype="centerCrop" android:src="@drawable/image"></imageview>

<button android:id="@+id/button" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/button_text"></button>
</com.jmedeisis.draglinearlayout.draglinearlayout>

Enabling drag & swap for all child views:

DragLinearLayout dragLinearLayout = (DragLinearLayout) findViewById(R.id.container);
for(int i = 0; i < dragLinearLayout.getChildCount(); i++){
    View child = dragLinearLayout.getChildAt(i);
    // the child will act as its own drag handle
    dragLinearLayout.setViewDraggable(child, child);
}

Use

#addDragView(View, View)

#addDragView(View, View, int)

and

#removeDragView(View)

to manage draggable children dynamically:

final View view = View.inflate(context, R.layout.view_layout, null);
dragLinearLayout.addDragView(view, view.findViewById(R.id.view_drag_handle));

// ..
dragLinearLayout.removeDragView(view);

Attach an

OnViewSwapListener

with

#setOnViewSwapListener(OnViewSwapListener)

to detect changes to the ordering of child

View

dragLinearLayout.setOnViewSwapListener(new DragLinearLayout.OnViewSwapListener() {
    @Override
    public void onSwap(View firstView, int firstPosition,
            View secondView, int secondPosition) {
        // update data, etc..
    }
});

When placing the

DragLinearLayout

inside a

ScrollView

, call

#setContainerScrollView(ScrollView)

to enable the user to scroll while dragging a child view.

For best visual results, use children that have opaque backgrounds. Furthermore, do not use horizontal padding for the

DragLinearLayout

; instead, let children apply their own horizontal padding.

Refer to the included sample activity project for a demonstration of the above usage techniques and more.

Limitations

Supports only the
```
LinearLayout#VERTICAL
```
orientation.

License

This project is licensed under the terms of the MIT license. You may find a copy of the license in the included

LICENSE

file.