Android中的資料存放區之SharedPreferences

使用SharedPreference時，資料的儲存必須使用commit()方法，否則資料不會儲存；
資料會儲存在DDMS的包目錄下的shared_prefs下：
Activity代碼
 

public class ContentProviderActivity extends Activity {     /** Called when the activity is first created. */     private static final String FILENAME = "tmacsky";     private TextView author = null;     private TextView age = null;          public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         /*SharedPreferences share = getSharedPreferences(FILENAME,Activity.MODE_PRIVATE);        SharedPreferences.Editor editor = share.edit();//指定操作的檔案名稱        editor.putString("author", "huanglong");        editor.putInt("age", 24);        editor.commit();*///第一段代碼         setContentView(R.layout.main);         author = (TextView)findViewById(R.id.author);         age = (TextView)findViewById(R.id.age);         SharedPreferences share = getSharedPreferences(FILENAME, Activity.MODE_PRIVATE);         author.setText("作者： "+share.getString("author", "沒有作者資訊"));         age.setText("年齡： "+share.getInt("age", 0));//第2段代碼      } } public class ContentProviderActivity extends Activity {    /** Called when the activity is first created. */    private static final String FILENAME = "tmacsky";    private TextView author = null;    private TextView age = null;       public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        /*SharedPreferences share = getSharedPreferences(FILENAME,Activity.MODE_PRIVATE);        SharedPreferences.Editor editor = share.edit();//指定操作的檔案名稱        editor.putString("author", "huanglong");        editor.putInt("age", 24);        editor.commit();*///第一段代碼        setContentView(R.layout.main);        author = (TextView)findViewById(R.id.author);        age = (TextView)findViewById(R.id.age);        SharedPreferences share = getSharedPreferences(FILENAME, Activity.MODE_PRIVATE);        author.setText("作者： "+share.getString("author", "沒有作者資訊"));        age.setText("年齡： "+share.getInt("age", 0));//第2段代碼    }}

XML代碼


 

?<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     android:orientation="vertical" >     <TextView         android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:textColor="#FFFFFF"          android:textSize="22px"         android:id="@+id/author"/>     <TextView         android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:textColor="#FFFFFF"          android:textSize="22px"         android:id="@+id/age"/> </LinearLayout> <?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <TextView        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:textColor="#FFFFFF"        android:textSize="22px"        android:id="@+id/author"/> <TextView        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:textColor="#FFFFFF"        android:textSize="22px"        android:id="@+id/age"/></LinearLayout>

先用第一段代碼裡的內容寫入資料，然後把第一段注釋掉，用下面第2段代碼加上main.xml來讀取資料: