简单存储 SharedPrefrences

java文件

package edu.hrbeu.SimplePreferenceDemo;


import edu.hrbue.SimplePreferenceDemo.R;
import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.widget.EditText;


public class SimplePreferenceDemoActivity extends Activity {

private EditText nameText;
private EditText ageText;
private EditText heightText;
    
public static final String PREFERENCE_NAME = "SaveSetting";
public static int MODE = Context.MODE_WORLD_READABLE + Context.MODE_WORLD_WRITEABLE;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        nameText = (EditText)findViewById(R.id.name);
        ageText = (EditText)findViewById(R.id.age);
        heightText = (EditText)findViewById(R.id.height);
    }
    
    @Override
    public void onStart(){
    super.onStart();
    loadSharedPreferences();
    }
    
    @Override
    public void onStop(){
    super.onStop();
    saveSharedPreferences();
    }
    
    private void loadSharedPreferences(){
      SharedPreferences sharedPreferences = getSharedPreferences(PREFERENCE_NAME, MODE);
      String name = sharedPreferences.getString("Name","Tom");
      int age = sharedPreferences.getInt("Age", 20);
      float height = sharedPreferences.getFloat("Height",1.81f);

      nameText.setText(name);
      ageText.setText(String.valueOf(age));
      heightText.setText(String.valueOf(height));   
    }
    
    private void saveSharedPreferences(){
      SharedPreferences sharedPreferences = getSharedPreferences(PREFERENCE_NAME, MODE);
      SharedPreferences.Editor editor = sharedPreferences.edit();
      
      editor.putString("Name", nameText.getText().toString());
      editor.putInt("Age", Integer.parseInt(ageText.getText().toString()));
      editor.putFloat("Height", Float.parseFloat(heightText.getText().toString()));
      editor.commit();
    }


    
}

布局文件 main.xml

<?xml version="1.0" encoding="utf-8"?>


<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/RelativeLayout01" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" >

<EditText android:id="@+id/name"
android:text=""  
android:layout_width="280dip" 
android:layout_height="wrap_content"
android:layout_alignParentRight="true" 
android:layout_marginLeft="10dip" >
</EditText>
<TextView android:id="@+id/name_label"
android:text="姓名："  
android:layout_width="wrap_content" 
android:layout_height="wrap_content"
android:layout_alignParentLeft="true" 
android:layout_toRightOf="@id/name" 
android:layout_alignBaseline="@+id/name">
</TextView>

<EditText android:id="@+id/age"
android:text=""  
android:layout_width="280dip" 
android:layout_height="wrap_content"
android:layout_alignParentRight="true" 
android:layout_marginLeft="10dip" 
android:layout_below="@id/name" 
android:numeric="integer">
</EditText>
<TextView android:id="@+id/age_label"
android:text="年龄："  
android:layout_width="wrap_content" 
android:layout_height="wrap_content"
android:layout_alignParentLeft="true" 
android:layout_toRightOf="@id/age" 
android:layout_alignBaseline="@+id/age" >
</TextView>


<EditText android:id="@+id/height"
android:layout_width="280dip" 
android:layout_height="wrap_content"
android:layout_alignParentRight="true" 
android:layout_marginLeft="10dip"
android:layout_below="@id/age" 
android:numeric="decimal">
</EditText>
<TextView android:id="@+id/height_label"
android:text="身高："  
android:layout_width="wrap_content" 
android:layout_height="wrap_content"
android:layout_alignParentLeft="true" 
android:layout_toRightOf="@id/height" 
android:layout_alignBaseline="@+id/height">
</TextView>

</RelativeLayout>