lzh0877 / android-collage-views

Draggable, rotatable, and scalable views for Android

android-collage-views

Introduction

"A video is worth a million words" Watch the demo here

(Note: Work only with API 11+)

Usage

1. Create a parent view having splitMotionEvents enabled, and having child views as below:

   <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
       android:layout_width="match_parent"
       android:layout_height="match_parent"
       android:splitMotionEvents="true">
   
       <ImageView
           android:id="@+id/collageBgView"
           android:layout_width="match_parent"
           android:layout_height="match_parent"
           android:layout_centerHorizontal="true"
           android:layout_centerVertical="true"
           android:background="#FFD4B081" />
   
       <com.thuytrinh.android.collageviewsdemo.CollageView
           android:id="@+id/collageView1"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:layout_centerHorizontal="true"
           android:layout_centerVertical="true"
           android:src="@drawable/daffodils" />
   
       <com.thuytrinh.android.collageviewsdemo.CollageView
           android:id="@+id/collageView2"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:layout_centerHorizontal="true"
           android:layout_centerVertical="true"
           android:src="@drawable/green" />
   
       <com.thuytrinh.android.collageviewsdemo.CollageView
           android:id="@+id/collageView3"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:layout_centerHorizontal="true"
           android:layout_centerVertical="true"
           android:src="@drawable/hawaii" />
   
       <com.thuytrinh.android.collageviewsdemo.CollageView
           android:id="@+id/collageView4"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:layout_centerHorizontal="true"
           android:layout_centerVertical="true"
           android:src="@drawable/sunset" />
   
   </RelativeLayout>

2. Find the child views and assign MultiTouchListener:

   findViewById(R.id.collageView1).setOnTouchListener(new MultiTouchListener());
   findViewById(R.id.collageView2).setOnTouchListener(new MultiTouchListener());

3. By default, translating, scaling, and rotating are enabled. However, if you want a child view not to be scaled but translated or rotated only, toggling isScaleEnabled, isTranslateEnabled, isRotateEnabled appropriately will do the trick.