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：
1 package com.zzw.testraw; 2 3 import java.io.BufferedInputStream; 4 import java.io.ByteArrayOutputStream; 5 import java.io.IOException; 6 import java.io.InputStream; 7 8 import android.app.Activity; 9 import android.os.Bundle;10 import android.util.Log;11 12 public class MainActivity extends Activity {13 14 private static final String TAG = "MainActivity";15 16 @Override17 protected void onCreate(Bundle savedInstanceState) {18 super.onCreate(savedInstanceState);19 // setContentView(R.layout.activity_main);20 21 readRaw();22 }23 24 private void readRaw() {25 InputStream is = getResources().openRawResource(R.raw.hello);26 27 try {28 byte[] data = readByteDataFromInputStream(is);29 String content = new String(data, 0, data.length, "UTF-8");30 Log.d(TAG, content);31 } catch (IOException e) {32 e.printStackTrace();33 }34 35 }36 37 private byte[] readByteDataFromInputStream(InputStream is) throws IOException {38 BufferedInputStream bis = new BufferedInputStream(is);39 40 ByteArrayOutputStream baos = new ByteArrayOutputStream();41 42 final int BUFFER_SIZE = 2 * 1024;43 44 int c = 0;45 byte[] buffer = new byte[BUFFER_SIZE];46 47 // 写成baos.write(buffer, 0, c)的原因是读多少写多少48 while ((c = bis.read(buffer)) != -1) {49 baos.write(buffer, 0, c);50 baos.flush();51 }52 53 byte[] data = baos.toByteArray();54 baos.flush();55 56 baos.close();57 is.close();58 59 return data;60 61 }62 }