获取Asset下文本内容和读取图片

  import android.content.Context;
 import android.content.res.AssetManager;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;

 import java.io.BufferedReader;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;

 public class LocalFileUtils {

     /**
      * 获取Asset下文本内容
      * @param context
      * @param str
      * @return
      */
     public final static String getStringFormAsset(Context context, String str) {
         BufferedReader in = null;
         try {
             in = new BufferedReader(new InputStreamReader(context.getAssets().open(str)));
             String line;
             StringBuilder buffer = new StringBuilder();
             while ((line = in.readLine()) != null) {
                 buffer.append(line).append('\n');
             }
             return buffer.toString();
         } catch (IOException e) {
             e.printStackTrace();
             return "";
         } finally {
             if (in != null) {
                 try {
                     in.close();
                     in = null;
                 } catch (IOException e) {
                     e.printStackTrace();
                 }
             }
         }
     }

     /**
      * @description 从Assets中读取图片
      *
      * @param context
      * @param fileName
      * @return 图片
      * @date 2015-6-11 15:00:55
      */
     public static Bitmap getImageFromAssetsFile(Context context, String fileName) {
         Bitmap image = null;
         AssetManager am = context.getAssets();
         InputStream is = null;
         try {
             is = am.open(fileName);
             image = BitmapFactory.decodeStream(is);
             return image;
         } catch (IOException e) {
             e.printStackTrace();
             return image;
         } finally {
             if(is != null) {
                 try {
                     is.close();
                     is = null;
                 } catch (IOException e) {
                     e.printStackTrace();
                 }
             }
         }
     }

     /**
      * 获取Raw下文本内容
      * @param context
      * @param rawId
      * @return
      */
     public final static String getStringFormRaw(Context context, int rawId) {
         ByteArrayOutputStream baos = null;
         InputStream in = context.getResources().openRawResource(rawId);
         try {
             baos = new ByteArrayOutputStream();
             byte[] buffer = new byte[1024];
             int len = 0;
             while ((len = in.read(buffer)) != -1) {
                 baos.write(buffer, 0, len);
             }
             baos.close();
             return baos.toString();
         } catch (Exception e) {
             e.printStackTrace();
             return "";
         } finally {
             if (baos != null) {
                 try {
                     baos.close();
                     baos = null;
                 } catch (IOException e) {
                     e.printStackTrace();
                 }
             }
         }
     }

 }

 long startTime4 = System.currentTimeMillis();
 String my_json = LocalFileUtils.getStringFormAsset(this, "testbean1.json");
 for (int n = 0; n < 100000; n++) {
    // 使用JSON 操作 工具将JSON字符串封装到实体类
    TestBean1 toBean = my_gson.fromJson(my_json, my_type); //JsonTool.toBean(json, TestBean1.class);
    System.out.println(toBean);
 }
 long endTime4 = System.currentTimeMillis() - startTime4;
 Log.i(TAG, "gson....." + endTime4);