Asset文件操作工具箱

来源：互联网发布：怎么区分淘宝二手镜头编辑：程序博客网时间：2024/06/18 09:07
/* * Copyright (C) 2013 Peng fei Pan <sky@xiaopan.me> *  * 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. */package me.xiaopan.android.content.res;import android.content.Context;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.Rect;import java.io.IOException;import java.io.InputStream;import java.nio.charset.Charset;import me.xiaopan.android.graphics.BitmapDecoder;import me.xiaopan.java.io.IOUtils;/** * Asset文件操作工具箱 */public class AssetUtils {      /**    * 读取给定文件名的文件的内容并转换成字符串    * @param context 上下文    * @param fileName 文件名    * @param charset 转换编码    * @return 读取结果    */   public static String getString(Context context, String fileName, Charset charset){      InputStream inputStream = null;      try {         inputStream = context.getAssets().open(fileName);         byte[] bytes = IOUtils.read(inputStream);         inputStream.close();         return new String(bytes, 0, bytes.length, charset.name());      } catch (IOException e) {         e.printStackTrace();         if(inputStream != null){            try {               inputStream.close();            } catch (IOException e1) {               e1.printStackTrace();            }         }         return null;      }   }      /**    * 读取给定文件名的文件的内容并转换成字符串    * @param context 上下文    * @param fileName 文件名    * @return 读取结果    */   public static String getString(Context context, String fileName){        InputStream inputStream = null;        try {            inputStream = context.getAssets().open(fileName);            byte[] bytes = IOUtils.read(inputStream);            inputStream.close();            return new String(bytes, 0, bytes.length, Charset.defaultCharset().name());        } catch (IOException e) {            e.printStackTrace();            if(inputStream != null){                try {                    inputStream.close();                } catch (IOException e1) {                    e1.printStackTrace();                }            }            return null;        }   }      /**    * 获取位图    * @param context 上下文    * @param fileName 文件名称    * @param outPadding 输出位图的内边距    * @param options 加载选项    * @return Bitmap    */   public static Bitmap getBitmap(Context context, String fileName, Rect outPadding, BitmapFactory.Options options){      return new BitmapDecoder().decodeFromAssets(context, fileName, outPadding, options);   }      /**    * 获取位图    * @param context 上下文    * @param fileName 文件名称    * @return Bitmap    */   public static Bitmap getBitmap(Context context, String fileName){      return new BitmapDecoder().decodeFromAssets(context, fileName);   }}
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