Here you can find the source of drawableToTransitionDrawable( Drawable drawable)
public static TransitionDrawable drawableToTransitionDrawable( Drawable drawable)
//package com.java2s; /*//from w w w. j a va2 s. c om * Copyright (C) 2013 www.418log.org * * 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. */ import android.graphics.drawable.ColorDrawable; import android.graphics.drawable.Drawable; import android.graphics.drawable.TransitionDrawable; public class Main { public static TransitionDrawable drawableToTransitionDrawable( Drawable drawable) { TransitionDrawable mBitmapDrawable = null; try { if (drawable == null) { return null; } mBitmapDrawable = new TransitionDrawable(new Drawable[] { new ColorDrawable(android.R.color.transparent), drawable }); } catch (Exception e) { e.printStackTrace(); } return mBitmapDrawable; } }