Android 读取assets文件下的txt文件

android 读取assets文件下的txt文件，解决了读取txt文件的乱码问题；

package com.example.com.scrollview;

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

import android.app.Activity;
import android.content.res.AssetManager;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;

public class MainActivity extends Activity {

private TextView novel;

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

novel = (TextView) findViewById(R.id.novel);
AssetManager am=getAssets();
try {
InputStream is=am.open("zx.txt");

String code=getCode(is);
is=am.open("zx.txt");
BufferedReader br=new BufferedReader(new InputStreamReader(is,code));

String line=br.readLine();
int i=0;
while(line!=null){
novel.append(line+"\n");
line=br.readLine();
i++;
if(i==200){
break;
}
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

// novel.setText(readNovel());

}

public String getCode(InputStream is){
try {
BufferedInputStream bin = new BufferedInputStream(is);
   int p;

p = (bin.read() << 8) + bin.read();

   String code = null;  

   switch (p) {
       case 0xefbb:
           code = "UTF-8";
           break;
       case 0xfffe:
           code = "Unicode";
           break;
       case 0xfeff:
           code = "UTF-16BE";
           break;
       default:
           code = "GBK";
   }
   is.close();
   return code;
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
}