package com.example.android.active;
import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.widget.Button;
import android.widget.EditText;
public class MainActivity6 extends Activity{
private EditText editText;
private Button button;
private SharedPreferences sharedPreferences;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main6);
button=(Button) findViewById(R.id.test);
editText=(EditText) findViewById(R.id.EditText_main6_1);
//获取共享属性操作的工具(文件名,操作模式)
//MODE_PRIVATE/0,私有模式,只能本应用访问
//MODE_WORLD_READABLE(读)和MODE_WORLD_WRITEABLE(写)不建议使用(其他因公可以直接读取)
sharedPreferences=this.getSharedPreferences("data", 0);
}
//在onPause()方法中编写保存数据的代码
//还原在onResume()方法中
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
//读取信息数据(从xml文件中),写入editor
String msg=editText.getText().toString();
Editor editor=sharedPreferences.edit();
editor.putString("msg", msg);
editor.commit();
}
//在onResume()方法中编写还原代码
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
editText.setText(sharedPreferences.getString("msg", ""));
/*
* 删除信息数据(文件中的信息)
Editor editor=sharedPreferences.edit();
editor.clear();
editor.commit();
*/
}
}
本文标题:abdroid的activity保存状态
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http://cdxtjz.cn/article/pjejei.html