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     // 文件名称15     private static final String FILE_NAME = "temp.txt";16     private EditText writeEdit;17     private EditText readEdit;18     @Override19     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      * 写文件27 */28     public void writeFile(View v){29         write(writeEdit.getText().toString());30     }31     /**32      * 读文件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 block47             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 }