sdcard안의 파일 내용 얻기

<FileListActivity.java>

package com.android.FileList;

import java.io.File;

import java.io.FileFilter;

import java.io.FilenameFilter;

import java.util.ArrayList;

import java.util.List;

import android.app.Activity;

import android.app.ListActivity;

import android.os.Bundle;

import android.os.Environment;

import android.util.Log;

import android.widget.ArrayAdapter;

import android.widget.ListView;

import android.widget.Toast;

class JavaFilter implements FilenameFilter{

public boolean accept(File dir, String filename){

return (filename.endsWith(".java"));

}

}

public class FileListActivity extends Activity {

    /** Called when the activity is first created. */

// private static final String FILE_PATH = new String("/sdcard/");

private List<String> mFileNames = new ArrayList<String>();

ListView mFileListView;

    @Override

    public void onCreate(Bundle savedInstanceState) {

   

    try{

       super.onCreate(savedInstanceState);

       setContentView(R.layout.file_list);

       

       mFileListView = (ListView)findViewById(R.id.file_list);

       this.updateFileList();

       

    }catch(NullPointerException e){

//     Log.v(getString(R.string.app_name), e.getMessage());

    Log.d("Error","1st");

    Toast.makeText(this, e.getMessage(), Toast.LENGTH_LONG).show();

    }

    }

   

    public void updateFileList(){

    String ext = Environment.getExternalStorageState();

    String path = null;

    if(ext.equals(Environment.MEDIA_MOUNTED)){

    path = Environment.getExternalStorageDirectory().getAbsolutePath()+"/javaeditor/";

   

    }else{

    path = Environment.MEDIA_UNMOUNTED;

    }

   

    File files = new File(path);

   

   

    if(files.listFiles(new JavaFilter()).length > 0){

    for(File file : files.listFiles(new JavaFilter())){

    mFileNames.add(file.getName());

    }

    }

   

    ArrayAdapter<String> fileList = new ArrayAdapter<String>(this, R.layout.file_list_item, mFileNames);

   

    mFileListView.setAdapter(fileList);

   

    }

   

}

 

<file_list.xml> 

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:orientation="vertical"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:weightSum="1">

<TextView

android:text="Select File to Load"

android:textSize="25dip"

android:textColor="#08C"

android:gravity="center_horizontal"

android:layout_marginTop="5dip"

android:layout_marginBottom="5dip"

   android:layout_width="fill_parent" android:layout_height="wrap_content"> 

    </TextView>

    <ListView

    android:id="@+id/file_list"

    android:layout_width="fill_parent" 

   android:layout_height="fill_parent" android:layout_weight="0.69"> 

    </ListView>
(주의! : ListView의 화면이내용이 TextView때문에 맨 아래로 밀려났을 수 있음(안보인) -> 마우스로 창을 적절히 조절

    

</LinearLayout>

<file_list_item.xml>  

<?xml version="1.0" encoding="utf-8"?>

<TextView

  xmlns:android="http://schemas.android.com/apk/res/android"

  android:textSize="25dip"

  android:layout_width="fill_parent"

  android:layout_height="match_parent">

    

</TextView>