package com.example.ipcplayer.activity;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.io.RandomAccessFile;
import com.example.ipcplayer.R;
import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.os.Bundle;
public class FileActivity extends Activity
{
final String FILE_NAME = "/FileSDTest.ini";
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.file);
// ��ȡ������ť
Button read = (Button) findViewById(R.id.read);
Button write = (Button) findViewById(R.id.write);
// ��ȡ�����ı���
final EditText edit1 = (EditText) findViewById(R.id.edit1);
final EditText edit2 = (EditText) findViewById(R.id.edit2);
// Ϊwrite��ť���¼�������
write.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View source)
{
// ��edit1�е�����д���ļ���
write(edit1.getText().toString());
edit1.setText("");
}
});
read.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
// ��ȡָ���ļ��е����ݣ�����ʾ����
edit2.setText(read());
}
});
}
private String read()
{
try
{
//����ֻ�������SD��������Ӧ�ó�����з���SD��Ȩ��
if (Environment.getExternalStorageState()
.equals(Environment.MEDIA_MOUNTED))
{
//��ȡSD����Ӧ�Ĵ洢Ŀ¼
File sdCardDir = Environment.getExternalStorageDirectory();
//��ȡָ���ļ���Ӧ��������
FileInputStream fis = new FileInputStream(sdCardDir
.getCanonicalPath() + FILE_NAME);
//��ָ����������װ��BufferedReader
BufferedReader br = new BufferedReader(new
InputStreamReader(fis));
StringBuilder sb = new StringBuilder("");
String line = null;
while((line = br.readLine()) != null)
{
sb.append(line);
}
return sb.toString();
}
}
catch (Exception e)
{
e.printStackTrace();
}
return null;
}
private void write(String content)
{
try
{
//����ֻ�������SD��������Ӧ�ó�����з���SD��Ȩ��
if (Environment.getExternalStorageState()
.equals(Environment.MEDIA_MOUNTED))
{
//��ȡSD����Ŀ¼
File sdCardDir = Environment.getExternalStorageDirectory();
File targetFile = new File(sdCardDir.getCanonicalPath()
+ FILE_NAME);
//��ָ���ļ����� RandomAccessFile����,��һ���������ļ����ƣ��ڶ��������Ƕ�дģʽ
RandomAccessFile raf = new RandomAccessFile(
targetFile , "rw");
//���ļ���¼ָ���ƶ������
raf.seek(targetFile.length());
// ����ļ�����
raf.write(content.getBytes());
raf.close();
}
}
catch (Exception e)
{
e.printStackTrace();
}
}
}