파일 입출력

// 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"
    >
<Button
android:id="@+id/BtnSave"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Save"
>
</Button>
<Button
android:id="@+id/BtnLoad"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Load"
>
</Button>
<Button
android:id="@+id/BtnLoadRes"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="LoadRes"
>
</Button>
<Button
android:id="@+id/BtnDelete"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Delete"
>
</Button>
<EditText
android:id="@+id/EdtStr"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
>
</EditText>
</LinearLayout>

 

// File.java

package pkg.File;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class File extends Activity {
    /** Called when the activity is first created. */
 EditText mEdit;
 
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        mEdit = (EditText)findViewById(R.id.EdtStr);
        findViewById(R.id.BtnDelete).setOnClickListener(mClick);
        findViewById(R.id.BtnLoad).setOnClickListener(mClick);
        findViewById(R.id.BtnLoadRes).setOnClickListener(mClick);
        findViewById(R.id.BtnSave).setOnClickListener(mClick);
    }
    
    Button.OnClickListener mClick = new View.OnClickListener() {
  @Override
  public void onClick(View v) {
   switch(v.getId()) {
    case R.id.BtnSave  : try {
            FileOutputStream fos = openFileOutput("test.txt", Context.MODE_WORLD_READABLE);
            String str = "Android File IO Test";
            fos.write(str.getBytes());
            fos.close();
            mEdit.setText("write success");
           } catch(Exception e) {
            
           }
           break;
         
    case R.id.BtnLoad  : try {
            FileInputStream fis = openFileInput("test.txt");
            byte[] data = new byte[fis.available()];
            
            while(fis.read(data) != -1) {;}
            fis.close();
            mEdit.setText(new String(data));
           } catch(FileNotFoundException e) {
            mEdit.setText("File Not Found");
           } catch(Exception e) {
            
           }
           break;
         
    case R.id.BtnLoadRes : try {
            
            
           } catch(Exception e) {
            ;
           }
     
           break;
         
    case R.id.BtnDelete  : 
           if(deleteFile("test.txt")) {
            mEdit.setText("delete success");
           } else {
            mEdit.setText("delete failed");
           }
     
           break;      
   }
   
  }
 };
}