以复选和单选框为列：
在回退之前，保存选项。
1、数据保存在File Explorer --> data -->data -->[
该项目的包](项目在虚拟机上运行之后，操作完毕返回
后，该项目的包内会自动生成文件)
xml文件
<CheckBox
android:id="@+id/cb1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:checked="true"
android:text="背景音乐"/>
<RadioGroup
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<RadioButton
android:id="@+id/rb3"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="3格"/>
<RadioButton
android:id="@+id/rb6"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="6格"/>
<RadioButton
android:id="@+id/rb9"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="9格"/>
</RadioGroup>
java代码
public class ProjActivity extends Activity{
private CheckBox cb1;
private RadioButton rb1;
private RadioButton rb2;
private RadioButton rb3;
@Override
public void onCreate(Bundle
savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
@Override
protected void onStart(){
super.onStart();
cb1 = (CheckBox)findViewById
(R.id.cb1);
rb1 = (RadioButton)findViewById
(R.id.rb3);
rb2 = (RadioButton)findViewById
(R.id.rb6);
rb3 = (RadilButton)findViewById
(R.id.rb9);
//获取选项数据存储
SharedPreferences sp =
getSharedPreferences
("setting",Context.MODE_PRIVATE);
boolean music = sp.getBoolean
("music",true);
cb1.setChecked(music);
int grids = sp.getInt("grids",3);
if(grids == 3)
rb1.setChecked(true);
else if(grids == 6)
rb2.setChecked(true);
else
rb3.setChecked(true);
}
@Override
protected void onStop(){
super.onStop();
//获取选项数据存储
SharedPreferences sp =
getSharedPreferences
("setting",Context.MODE_PRIVATE);
//获取选项数据存储编辑器
Editor editor = sp.edit();
editor.putBoolean
("music",cb1.isChecker());
if(rb1.isChecked()){
editor.putInt("grids",3);
}
if(rb2.isChecked()){
editor.putInt("grids",6);
}
if(rb3.isChecked()){
editor.putInt("grids",9);
}
//提交数据
editor.commit();
}
}