因為作者最近在做一個收藏的功能，涉及到了資料的儲存和讀取，又因為太懶，不想去使用ContentProvider，所以種種原因讓我選擇了使用SharedPreferences來儲存資料，但是儲存一條、兩條單獨的資料是可以的，但是要儲存物件！作者只能說咋搞！怕啥，一步一步的來嘛！

第一步：在csdn網站，下載“commons-codec-1.4.jar”

第二步：

public class Obj2SharedUtils {
    public static void saveFavorites_Entity(Context context,Favorites_Entity entity,String id) {
        SharedPreferences preferences = context.getSharedPreferences("myfavorites",context.MODE_PRIVATE);
        // 建立位元組輸出流
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        try {
            // 建立物件輸出流，並封裝位元組流
            ObjectOutputStream oos = new ObjectOutputStream(baos);
            // 將物件寫入位元組流
            oos.writeObject(entity);
            // 將位元組流編碼成base64的字元竄
            String favorites_Base64 = new String(Base64.encodeBase64(baos.toByteArray()));
            SharedPreferences.Editor editor = preferences.edit();
            editor.putString(id, favorites_Base64);
            editor.commit();
        } catch (IOException e) {
        }
        Log.e("ok", "儲存成功");
    }

    public static  Favorites_Entity readFavorites_Entity(Context context,String id) {
        Favorites_Entity entity = null;
        SharedPreferences preferences = context.getSharedPreferences("myfavorites",context.MODE_PRIVATE);
        String favoritesBase64 = preferences.getString(id, "");

        //讀取位元組
        byte[] base64 = Base64.decodeBase64(favoritesBase64.getBytes());

        //封裝到位元組流
        ByteArrayInputStream bais = new ByteArrayInputStream(base64);
        try {
            //再次封裝
            ObjectInputStream bis = new ObjectInputStream(bais);
            try {
                //讀取物件
                entity = (Favorites_Entity) bis.readObject();
            } catch (ClassNotFoundException e) {
                e.printStackTrace();
            }
        } catch (StreamCorruptedException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return entity;
    }
}
 

第三步：

infos_favorites = (ImageView)findViewById(R.id.infos_favorites);
infos_favorites.setOnClickListener(new OnClickListener() {
	@Override
	public void onClick(View v) {
		f_Entity = new Favorites_Entity();
		if(sp.getString(id,"0").equals(id)) {
			sEditor.remove(id);
			sEditor.commit();
			editor.putString(id,"0");
			editor.commit();
			infos_favorites.setImageResource(R.drawable.icon7);
			Toast.makeText(News_Infos_Activity.this,"取消收藏",Toast.LENGTH_SHORT).show();
			return;
		}
		Log.e("收藏id",id);
		editor.putString(id,id);
		editor.commit();
		infos_favorites.setImageResource(R.drawable.icon8);
		f_Entity.setFavorites_Id(id);
		f_Entity.setFavorites_Url(url);
		f_Entity.setFirst_typeid(entity.getFirst_typeid());
		f_Entity.setFavorites_Title(entity.getNews_title());
		sd = sdf.format(new Date());
		f_Entity.setFavorites_Time(sd);
		//將物件儲存到SharedPreferences中
		Obj2SharedUtils.saveFavorites_Entity(News_Infos_Activity.this,f_Entity,id);
		Toast.makeText(News_Infos_Activity.this,"收藏成功",Toast.LENGTH_SHORT).show();
	}
});