SharedPreferences的简单实例

package com.delightPress.chap61.pref;

import com.delightPress.chap61.R;

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

public class PrefManual extends Activity {
    
    public static final String PREF_FILENAME = "aLibro.pref";
    
    /**
     * 从界面中取得用户首选
     * 并且存储进 PREF_FILENAME 之中
     */
    public class PreferenceOnClickListenter implements OnClickListener{

        @Override
        public void onClick(View v) {
            //按照文件名取得首选设置
            SharedPreferences settings = getSharedPreferences(PREF_FILENAME, 0);
            //取得首选编辑器
            SharedPreferences.Editor editor = settings.edit();
            //取得用户输入的公司抬头和统编
            String title = ((EditText) PrefManual.this.findViewById(R.id.pref_title)).getText().toString();
            String serial = ((EditText) PrefManual.this.findViewById(R.id.pref_serial)).getText().toString();
            editor.putString("title", title);
            editor.putString("serial", serial);
            
            //将数据写入首选设置
            editor.commit();
            finish();
        }
        
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.pref_manual);
        Button submitButton = (Button) findViewById(R.id.pref_submit);
        submitButton.setOnClickListener(new PreferenceOnClickListenter());
        
        //set the orginal value for EditView
        SharedPreferences settings = getSharedPreferences(PREF_FILENAME, 0);
        if( settings.contains("title") ){
            ((EditText) PrefManual.this.findViewById(R.id.pref_title)).setText(settings.getString("title", "defaultTitle"));
        }
        if( settings.contains("serial") ){
            ((EditText) PrefManual.this.findViewById(R.id.pref_serial)).setText(settings.getString("serial", "88888888"));
        }
    }

}

finish后返回，即时修改，同样也要在onResume中处理

package com.delightPress.chap61.tabActivity;

import com.delightPress.chap61.R;
import com.delightPress.chap61.pref.PrefManual;

import android.app.Activity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class Totalcome extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.total);
        Button theButton = (Button) findViewById(R.id.quit_app);
        theButton.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                System.exit(0);
            }
            
        });
        
        //从用户首选项中读取首选设置
        SharedPreferences settings = getSharedPreferences(PrefManual.PREF_FILENAME, 0);
        TextView titleView = (TextView) findViewById(R.id.cpmpany_title);
        String companyTitle = String.format(getString(R.string.pref_title_string), settings.getString("title", "XXX Ltd."));
        titleView.setText(companyTitle);
        TextView serialView = (TextView) findViewById(R.id.company_serial);
        String companySerial = String.format(getString(R.string.pref_serial_string), settings.getString("serial", "12345678"));
        serialView.setText(companySerial);
    }

    @Override
    protected void onResume() {
        // TODO Auto-generated method stub
        super.onResume();
        //从用户首选项中读取首选设置
        SharedPreferences settings = getSharedPreferences(PrefManual.PREF_FILENAME, 0);
        TextView titleView = (TextView) findViewById(R.id.cpmpany_title);
        String companyTitle = String.format(getString(R.string.pref_title_string), settings.getString("title", "XXX Ltd."));
        titleView.setText(companyTitle);
        TextView serialView = (TextView) findViewById(R.id.company_serial);
        String companySerial = String.format(getString(R.string.pref_serial_string), settings.getString("serial", "12345678"));
        serialView.setText(companySerial);
    }
    
    
}