获取Asset下文本内容和读取图片

  1  import android.content.Context;
  2 import android.content.res.AssetManager;
  3 import android.graphics.Bitmap;
  4 import android.graphics.BitmapFactory;
  5 
  6 import java.io.BufferedReader;
  7 import java.io.ByteArrayOutputStream;
  8 import java.io.IOException;
  9 import java.io.InputStream;
 10 import java.io.InputStreamReader;
 11 
 12 
 13 public class LocalFileUtils {
 14 
 15     /**
 16      * 获取Asset下文本内容
 17      * @param context
 18      * @param str
 19      * @return
 20      */
 21     public final static String getStringFormAsset(Context context, String str) {
 22         BufferedReader in = null;
 23         try {
 24             in = new BufferedReader(new InputStreamReader(context.getAssets().open(str)));
 25             String line;
 26             StringBuilder buffer = new StringBuilder();
 27             while ((line = in.readLine()) != null) {
 28                 buffer.append(line).append(‘\n‘);
 29             }
 30             return buffer.toString();
 31         } catch (IOException e) {
 32             e.printStackTrace();
 33             return "";
 34         } finally {
 35             if (in != null) {
 36                 try {
 37                     in.close();
 38                     in = null;
 39                 } catch (IOException e) {
 40                     e.printStackTrace();
 41                 }
 42             }
 43         }
 44     }
 45 
 46     /**
 47      * @description 从Assets中读取图片
 48      *
 49      * @param context
 50      * @param fileName
 51      * @return 图片
 52      * @date 2015-6-11 15:00:55
 53      */
 54     public static Bitmap getImageFromAssetsFile(Context context, String fileName) {
 55         Bitmap image = null;
 56         AssetManager am = context.getAssets();
 57         InputStream is = null;
 58         try {
 59             is = am.open(fileName);
 60             image = BitmapFactory.decodeStream(is);
 61             return image;
 62         } catch (IOException e) {
 63             e.printStackTrace();
 64             return image;
 65         } finally {
 66             if(is != null) {
 67                 try {
 68                     is.close();
 69                     is = null;
 70                 } catch (IOException e) {
 71                     e.printStackTrace();
 72                 }
 73             }
 74         }
 75     }
 76 
 77     /**
 78      * 获取Raw下文本内容
 79      * @param context
 80      * @param rawId
 81      * @return
 82      */
 83     public final static String getStringFormRaw(Context context, int rawId) {
 84         ByteArrayOutputStream baos = null;
 85         InputStream in = context.getResources().openRawResource(rawId);
 86         try {
 87             baos = new ByteArrayOutputStream();
 88             byte[] buffer = new byte[1024];
 89             int len = 0;
 90             while ((len = in.read(buffer)) != -1) {
 91                 baos.write(buffer, 0, len);
 92             }
 93             baos.close();
 94             return baos.toString();
 95         } catch (Exception e) {
 96             e.printStackTrace();
 97             return "";
 98         } finally {
 99             if (baos != null) {
100                 try {
101                     baos.close();
102                     baos = null;
103                 } catch (IOException e) {
104                     e.printStackTrace();
105                 }
106             }
107         }
108     }
109 
110 }

1 long startTime4 = System.currentTimeMillis();
2 String my_json = LocalFileUtils.getStringFormAsset(this, "testbean1.json");
3 for (int n = 0; n < 100000; n++) {
4    // 使用JSON 操作 工具将JSON字符串封装到实体类
5    TestBean1 toBean = my_gson.fromJson(my_json, my_type); //JsonTool.toBean(json, TestBean1.class);
6    System.out.println(toBean);
7 }
8 long endTime4 = System.currentTimeMillis() - startTime4;
9 Log.i(TAG, "gson....." + endTime4);