从零开始学android<数据存储（2）Internal Storage内部存储.三十六.>

1. Call openFileOutput() with the name of the file and the operating mode. This returns a FileOutputStream.通过 openFileOutput()建立FileoutputStream对象
2. Write to the file with write().创建Write对象并进行数据读写操作
3. Close the stream with close().最后关闭链接

以上就是讲数据文件保存到内部储存的基本步骤

下面用代码进行一下讲解

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xml文件

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context=".MainActivity" >    <Button        android:id="@+id/button2"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignBaseline="@+id/button1"        android:layout_alignBottom="@+id/button1"        android:layout_marginLeft="51dp"        android:layout_toRightOf="@+id/button1"        android:text="读取信息" />    <Button        android:id="@+id/button1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentLeft="true"        android:layout_alignParentTop="true"        android:layout_marginLeft="31dp"        android:layout_marginTop="142dp"        android:text="保存信息" />    <TextView        android:id="@+id/textView1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentTop="true"        android:layout_centerHorizontal="true"        android:layout_marginTop="47dp"        android:text="保存数据到内部储存"        android:textAppearance="?android:attr/textAppearanceMedium" /></RelativeLayout>

ＪＡＶＡ文件

package com.example.internalstorage;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import android.app.Activity;import android.content.Context;import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.Button;import android.widget.Toast;public class MainActivity extends Activity {private Button saveData, getData;private static final String FILENAME = "flyou.txt";@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);saveData=(Button)this.findViewById(R.id.button1);getData=(Button)this.findViewById(R.id.button2);saveData.setOnClickListener(new View.OnClickListener() {／／保存信息@Overridepublic void onClick(View v) {// TODO Auto-generated method stubFileOutputStream out = null;try {String infoString = "风飞雪未扬";out = openFileOutput(FILENAME, Context.MODE_PRIVATE);out.write(infoString.getBytes());Toast.makeText(MainActivity.this, "数据保存成功", 2).show();} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}finally {try {if (out!=null) {out.close();}} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}});//读取信息getData.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubFileInputStream input=null;try {input=openFileInput(FILENAME);byte[] data=new byte[1024];int len=input.read(data);input.close();//System.out.println(new String(data,0,len));Toast.makeText(MainActivity.this, new String(data,0,len), 2).show();} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}});}}

打开信息

使用文件浏览器查看信息

将文件导出

用记事本打开

以上操作可以很容易的实现文件的内部存储过程

官方ａｐｉ当中还有关于如何存储缓存文件的说明，大家可以自行实验一下

下节预报：

External Storage外部存储