안드로이드 - txt 저장 열기 삭제 질문이요!(글수가 모잘라서 나눠올립니다 ㅠ)

txt 파일을 저장하고, 읽어들이고 삭제하는 앱입니다

아래 소스는 통째로 그대로 올렸구요

몇가지 문제가 있더라구요

1) 열기버튼으로 test.txt 식의 파일을 열면

test.txt 로 열립니다 그런데 또 이거를 저장하기 버튼을 누르면

test.txttxt 식으로 저장이되고 이것을 또 열고 저장하면

test.txttxttxt 식으로 무한으로 붙습니다.

열기 할 때 확장자를 제외하고 이름값을 가져오면 이런문제가 안생길것 같은데..

어느부분을 수정해야 할까요? ㅠㅠ

2) 삭제 버튼을 누르면 TEST_TEXT_WRITE 에 저장된 txt파일 리스트가 나열되는데,

단순히 터치한번이면 바로 삭제가됩니다. 터치한번 하면 바로 삭제가 아닌,

정말 삭제하시겠습니까? Yes / no 식으로 창이 뜨고 yes 누르면 삭제 되는것은 어떻게 구현하면 좋을까요?

도움의 말이라도 감사합니다.. ㅠㅠ

* MainActivity.java ( 안드로이드 매니페스트에 write_external_storage 쓰기권한 읽기권한 두개 줬습니다 )

public class MainActivity extends Activity {
    /** Called when the activity is first created. */
 
    private String path;//저장하는 곳의 경로
    private EditText ed1;//제목 적는 EditText
    private EditText ed2;//내용 적는 EditText
    private Button bt1;//저장하기 버튼
    private Button bt2;//불러오기 버튼
    private Button bt3;//삭제하기 버튼
 
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        path = Environment.getExternalStorageDirectory().getAbsolutePath()+File.separator+"/TEST_TEXT_WRITE";
 
        ed1 = (EditText)findViewById(R.id.ed1);
        ed2 = (EditText)findViewById(R.id.ed2);
        bt1 = (Button)findViewById(R.id.bt1);
        bt2 = (Button)findViewById(R.id.bt2);
        bt3 = (Button)findViewById(R.id.bt3);
 
        bt1.setOnClickListener(btListener);
        bt2.setOnClickListener(btListener);
        bt3.setOnClickListener(btListener);
    }
    Button.OnClickListener btListener = new Button.OnClickListener(){
        public void onClick(View v) {
            // TODO Auto-generated method stub
            switch(v.getId()){
                case R.id.bt1:
                    String ed1text = ed1.getText().toString().trim();
                    if(ed1text.length()>0){
                        onTextWriting(ed1text,ed2.getText().toString());
                    }
                    break;
                case R.id.bt2:
                    onTextRead();
                    break;
                case R.id.bt3:
                    deltext();
                    break;
            }
        }
 
    };
    private void onTextWriting(String title,String body){
        File file;
        file = new File(path);
        if(!file.exists()){
            file.mkdirs();
        }
        file = new File(path+File.separator+title+".txt");
        try{
            FileOutputStream fos = new FileOutputStream(file);
            BufferedWriter buw = new BufferedWriter(new OutputStreamWriter(fos, "UTF8"));
            buw.write(body);
            buw.close();
            fos.close();
            Toast.makeText(this, "저장되었습니다.", Toast.LENGTH_SHORT).show();
        }catch(IOException e){
 
        }
    }
    private void onTextRead(){
        final ArrayList<File> filelist = new ArrayList<File>();
        File files = new File(path);
        if(!files.exists()){
            files.mkdirs();
        }
        if(files.listFiles().length>0){
            for(File file : files.listFiles(new TextFileFilter())){
                filelist.add(file);
            }
        }
        CharSequence[] filename = new CharSequence[filelist.size()];
        for(int i = 0 ; i < filelist.size() ; i++){
            filename[i] = filelist.get(i).getName();
        }
        new AlertDialog.Builder(this)
                .setTitle("TEXT FILE LIST")
                .setItems(filename, new DialogInterface.OnClickListener() {
 
                    public void onClick(DialogInterface arg0, int arg1) {
                        // TODO Auto-generated method stub
                        try{
                            String body = "";
                            StringBuffer bodytext = new StringBuffer();
                            File selecttext = filelist.get(arg1);
                            FileInputStream fis = new FileInputStream(selecttext);
                            BufferedReader bufferReader = new BufferedReader(new InputStreamReader(fis,"UTF-8"));
                            while((body = bufferReader.readLine())!=null){
                                bodytext.append(body);
                            }
                            ed1.setText(selecttext.getName());
                            ed2.setText(bodytext.toString());
                        }catch(IOException e){
 
                        }
                    }
                }).setNegativeButton("취소", new DialogInterface.OnClickListener() {
 
            public void onClick(DialogInterface dialog, int which) {
                // TODO Auto-generated method stub
 
            }
        }).show();
    }
    private void deltext(){
        final ArrayList<File> filelist = new ArrayList<File>();
        File files = new File(path);
        if(!files.exists()){
            files.mkdirs();
        }
        if(files.listFiles().length>0){
            for(File file : files.listFiles(new TextFileFilter())){
                filelist.add(file);
            }
        }
        CharSequence[] filename = new CharSequence[filelist.size()];
        for(int i = 0 ; i < filelist.size() ; i++){
            filename[i] = filelist.get(i).getName();
        }
        new AlertDialog.Builder(this)
                .setTitle("TEXT FILE LIST")
                .setItems(filename, new DialogInterface.OnClickListener() {
 
                    public void onClick(DialogInterface arg0, int arg1) {
                        // TODO Auto-generated method stub
                        filelist.get(arg1).delete();
                        deltext();
                    }
                }).setNegativeButton("취소", new DialogInterface.OnClickListener() {
 
            public void onClick(DialogInterface dialog, int which) {
                // TODO Auto-generated method stub
 
            }
        }).show();
    }
    class TextFileFilter implements FileFilter{
        public boolean accept(File file) {
            // TODO Auto-generated method stub
            if(file.getName().endsWith(".txt"))return true;
            return false;
        }
    }
}

* activity_main.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"
    >
    <EditText
        android:id="@+id/ed1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:hint="제목을 적으세요!"
        />
    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        >
        <Button
            android:id="@+id/bt1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="저장"/>
        <Button
            android:id="@+id/bt2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="열기"/>
        <Button
            android:id="@+id/bt3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="삭제"/>
    </LinearLayout>
    <EditText
        android:id="@+id/ed2"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:hint="내용을 적으세요!"/>
</LinearLayout>

txt 저장 열기 삭제 질문이요!(글수가 모잘라서 나눠올립니다 ㅠ)

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