Android File資料存放區

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width="fill_parent"
 4     android:layout_height="fill_parent"
 5     android:orientation="vertical" >
 6     <EditText 
 7         android:id="@+id/write_edit"
 8         android:layout_width="fill_parent"
 9         android:layout_height="wrap_content"
10         android:lines="4"
11         android:gravity="top"
12         />
13     <Button 
14         android:layout_width="wrap_content"
15         android:layout_height="wrap_content"
16         android:text="Save"
17         android:onClick="writeFile"
18         />
19     <EditText 
20         android:layout_width="fill_parent"
21         android:layout_height="wrap_content"
22         android:lines="4"
23         android:id="@+id/read_edit"
24         android:gravity="top"
25         android:editable="false"
26         android:focusable="false"
27         />
28     <Button 
29         android:layout_width="wrap_content"
30         android:layout_height="wrap_content"
31         android:text="Read"
32         android:onClick="readFile"
33         />
34 </LinearLayout>

 

 1 package com.turboradio.activity;
 2 
 3 import java.io.FileInputStream;
 4 import java.io.FileNotFoundException;
 5 import java.io.FileOutputStream;
 6 import java.io.IOException;
 7 
 8 import android.app.Activity;
 9 import android.os.Bundle;
10 import android.view.View;
11 import android.widget.EditText;
12 
13 public class FileSaveActivity extends Activity{
14     // 檔案名稱
15     private static final String FILE_NAME = "temp.txt";
16     private EditText writeEdit;
17     private EditText readEdit;
18     @Override
19     protected void onCreate(Bundle savedInstanceState) {
20         super.onCreate(savedInstanceState);
21         setContentView(R.layout.file_save);
22         writeEdit = (EditText)findViewById(R.id.write_edit);
23         readEdit = (EditText)findViewById(R.id.read_edit);
24     }
25     /**
26      * 寫檔案
27 */
28     public void writeFile(View v){
29         write(writeEdit.getText().toString());
30     }
31     /**
32      * 讀檔案
33 */
34     public  void readFile(View v){
35         readEdit.setText(read());
36     }
37     private String read(){
38         try {
39             FileInputStream fis = openFileInput(FILE_NAME);
40             byte [] bytes = new byte [1024];
41             fis.read(bytes);
42             return new String(bytes);
43         } catch (FileNotFoundException e) {
44             e.printStackTrace();
45         } catch (IOException e) {
46             // TODO Auto-generated catch block
47             e.printStackTrace();
48         }
49         return null;
50     }
51     private void write(String content){
52         try {
53             FileOutputStream fos = openFileOutput(FILE_NAME,MODE_APPEND);
54             fos.write(content.getBytes());
55             fos.close();
56         } catch (FileNotFoundException e) {
57             e.printStackTrace();
58         } catch (IOException e) {
59             e.printStackTrace();
60         }
61     }
62 }