Java tutorial
//package com.java2s; /* * Copyright (C) 2015 zhenjin ma * * 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.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.provider.MediaStore; public class Main { public static Bitmap getThumbnail(Context context, String url) { BitmapFactory.Options options = new BitmapFactory.Options(); options.inJustDecodeBounds = true; BitmapFactory.decodeFile(url, options); float w = options.outWidth; float h = options.outHeight; float max = Math.max(w, h); BitmapFactory.Options bounds = new BitmapFactory.Options(); bounds.inPurgeable = true; bounds.inInputShareable = true; bounds.inJustDecodeBounds = false; float size = max / 800; if (size > 1) { bounds.inSampleSize = (int) size; } return BitmapFactory.decodeFile(url, bounds); } public static Bitmap getThumbnail(Context context, long origId) { //BitmapFactory.Options bounds = new BitmapFactory.Options(); //bounds.inPurgeable=true; //bounds.inInputShareable=true; Bitmap bitmap = MediaStore.Images.Thumbnails.getThumbnail(context.getContentResolver(), origId, MediaStore.Images.Thumbnails.MINI_KIND, /*bounds*/null); return bitmap; } }