res/raw文件的存放和读取

通常，如果Android开发者有些文件比如音频，视频，.html，.mp3等等这些文件不希望编译器编译而保持原始原貌打包进apk文件（这在游戏开发中很常见和普遍，如游戏用到的游戏音乐、图等资源），那么可以使用Android在res目录下的res/raw保存。res/raws目录下的文件将不被Android编译成二进制，Android将这些文件资源保持原状原封不动的打包进最终编译发布时候的apk文件。

怎样读取raw文件：

 package com.zzw.testraw;

 import java.io.BufferedInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;

 import android.app.Activity;
 import android.os.Bundle;
 import android.util.Log;

 public class MainActivity extends Activity {

     private static final String TAG = "MainActivity";

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         // setContentView(R.layout.activity_main);

         readRaw();
     }

     private void readRaw() {
         InputStream is = getResources().openRawResource(R.raw.hello);

         try {
             byte[] data = readByteDataFromInputStream(is);
             String content = new String(data, 0, data.length, "UTF-8");
             Log.d(TAG, content);
         } catch (IOException e) {
             e.printStackTrace();
         }

     }

     private byte[] readByteDataFromInputStream(InputStream is) throws IOException {
         BufferedInputStream bis = new BufferedInputStream(is);

         ByteArrayOutputStream baos = new ByteArrayOutputStream();

         final int BUFFER_SIZE = 2 * 1024;

         int c = 0;
         byte[] buffer = new byte[BUFFER_SIZE];

         // 写成baos.write(buffer, 0, c)的原因是读多少写多少
         while ((c = bis.read(buffer)) != -1) {
             baos.write(buffer, 0, c);
             baos.flush();
         }

         byte[] data = baos.toByteArray();
         baos.flush();

         baos.close();
         is.close();

         return data;

     }
 }