InputOutputStream_1 공부.

//1. 내장 메모리 핸들링

public class Io01 extends Activity 

implements View.OnClickListener {

    private Button b1, b2, b3, b4, b5;

    private EditText et;

    private static final String FNAME = "aa\\bb\\save.txt";

    private static final String DPATH = "aa/bb";

    

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        

        et = (EditText)findViewById(R.id.EditText01);

        b1 = (Button)findViewById(R.id.Button01);

        b2 = (Button)findViewById(R.id.Button02);

        b3 = (Button)findViewById(R.id.Button03);

        b4 = (Button)findViewById(R.id.Button04);

        b5 = (Button)findViewById(R.id.Button05);

        

        b1.setOnClickListener(this);

        b2.setOnClickListener(this);

        b3.setOnClickListener(this);

        b4.setOnClickListener(this);

        b5.setOnClickListener(this);

    }

    @Override

    public void onStart(){

    super.onStart();

    read();

    }

    @Override

    public void onStop(){

    super.onStop();

    write(); reset();

    }

    @Override

public void onClick(View v) {

switch (v.getId()) {

case R.id.Button01: read(); break;

case R.id.Button02: write(); reset(); break;

case R.id.Button03: reset(); break;

case R.id.Button04: del(); reset(); break;

case R.id.Button05: makeDir(); break;

}

}

    private void read(){

    //저장된 파일을 읽어 오세요.

    FileInputStream fis = null;

    BufferedReader br = null;

    String line = "";

    StringBuilder sb = new StringBuilder();

    try{

    fis = openFileInput(FNAME);

    br = new BufferedReader(

    new InputStreamReader(fis), 512);

    while((line = br.readLine()) != null){

    sb.append(line + "\n");

    }

    et.setText(sb.toString());

    }catch(IOException ie){

    }finally{

    try{

    if(br != null) br.close();

    if(fis != null) fis.close();

    }catch(IOException ie){}

    }

    }

    private void write(){

    FileOutputStream fos = null;

    PrintWriter pw = null;

    String data = null;

    try {

    fos = this.openFileOutput(FNAME , MODE_PRIVATE);

    pw = new PrintWriter(fos, true);

    data = et.getText().toString();

    if(data != null) data = data.trim();

    if(data.length() != 0){

    pw.println(data);

    showMsg(FNAME + " 파일에 쓰기 성공");

    }

    }catch(FileNotFoundException fnfe){

    showMsg(FNAME + " 파일을 찾을 수 없음");

    }finally{

    try{

    if(pw != null) pw.close();

    if(fos != null) fos.close();

    }catch(IOException ie){}

    }

    }

    private void reset(){

    et.setText("");

    }

    private void del(){

    //파일(save.txt) 삭제 구현 

    deleteFile(FNAME);

    showMsg(FNAME + "이란 파일 삭제 완료");

    }

    private void makeDir(){

    File f = new File("/data/data/soo.io.test1/files/"+DPATH);

    if(!f.exists()){

    f.mkdirs();

    showMsg(DPATH+"이란 디렉토리 생성 완료");

    }

    }

    private void showMsg(String str){

    Toast.makeText(this, str, 0).show();

    }

}