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分享SharedPreferences 存储List数据的问题
用 SharedPreferences 存储以下list数据后，例如从SharedPreferences 提取时date时只能显示一个数据，要想显示指定的，必须把i设置成具体的数才行
请教这段代码里面的被存储变量怎么样才能在SharedPreferences 中遍历出来
WeatherInfo wIf = gson.fromJson(s, WeatherInfo.class);
List<DailyForecast> dailyForecasts = wIf.getDaily_forecast();
for (int i = 0; i < 7; i++) {
DailyForecast dailyForecast = dailyForecasts.get(i);
String date = dailyForecasts.get(i).getDate();
Astro astro = dailyForecasts.get(i).getAstro();
String sr = astro.getSr();
String ss = astro.getSs();
Cond cond = dailyForecasts.get(i).getCond();
int cond_code = cond.getCode();
String cond_txt = cond.getTxt();
int cond_code_d = cond.getCode_d();
int cond_code_n = cond.getCode_n();
String cond_txt_d = cond.getTxt_d();
int hum_daily = dailyForecasts.get(i).getHum();
Tmp tmp_daily = dailyForecasts.get(i).getTmp();
saveDailyForecast(MyApplication.getContext(), date, sr, ss, cond_code, cond_txt, cond_code_d, cond_code_n, cond_txt_d, hum_daily,tmp_daily);
}
public static void saveDailyForecast(Context context, String date, String sr, String ss, int cond_code,
String cond_txt, int cond_code_d, int cond_code_n, String cond_txt_d,
int hum_daily, Tmp tmp_daily) {
SharedPreferences.Editor editor = PreferenceManager.getDefaultSharedPreferences(context).edit();
editor.putString("date_daily", date);
editor.putString("astro_sr",sr);
editor.putString("astro_ss",ss);
editor.putInt("cond_code", cond_code);
editor.putString("cond_txt", cond_txt);
editor.putInt("cond_code_d", cond_code_d);
editor.putInt("cond_code_n", cond_code_n);
editor.putString("cond_txt_d", cond_txt_d);
editor.putInt("hum_daly", hum_daily);
editor.putInt("max_daily",tmp_daily.getMax());
editor.putInt("min_daily",tmp_daily.getMin());
editor.commit();
}
请教这段代码里面的被存储变量怎么样才能在SharedPreferences 中遍历出来
WeatherInfo wIf = gson.fromJson(s, WeatherInfo.class);
List<DailyForecast> dailyForecasts = wIf.getDaily_forecast();
for (int i = 0; i < 7; i++) {
DailyForecast dailyForecast = dailyForecasts.get(i);
String date = dailyForecasts.get(i).getDate();
Astro astro = dailyForecasts.get(i).getAstro();
String sr = astro.getSr();
String ss = astro.getSs();
Cond cond = dailyForecasts.get(i).getCond();
int cond_code = cond.getCode();
String cond_txt = cond.getTxt();
int cond_code_d = cond.getCode_d();
int cond_code_n = cond.getCode_n();
String cond_txt_d = cond.getTxt_d();
int hum_daily = dailyForecasts.get(i).getHum();
Tmp tmp_daily = dailyForecasts.get(i).getTmp();
saveDailyForecast(MyApplication.getContext(), date, sr, ss, cond_code, cond_txt, cond_code_d, cond_code_n, cond_txt_d, hum_daily,tmp_daily);
}
public static void saveDailyForecast(Context context, String date, String sr, String ss, int cond_code,
String cond_txt, int cond_code_d, int cond_code_n, String cond_txt_d,
int hum_daily, Tmp tmp_daily) {
SharedPreferences.Editor editor = PreferenceManager.getDefaultSharedPreferences(context).edit();
editor.putString("date_daily", date);
editor.putString("astro_sr",sr);
editor.putString("astro_ss",ss);
editor.putInt("cond_code", cond_code);
editor.putString("cond_txt", cond_txt);
editor.putInt("cond_code_d", cond_code_d);
editor.putInt("cond_code_n", cond_code_n);
editor.putString("cond_txt_d", cond_txt_d);
editor.putInt("hum_daly", hum_daily);
editor.putInt("max_daily",tmp_daily.getMax());
editor.putInt("min_daily",tmp_daily.getMin());
editor.commit();
}
...全文
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睡精灵 2016-07-02
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类似这种Json数据，建议用sharedpreference还是SQLite存储比较好。
HeWeather data service 3.0": [
{
"basic": {
"city": "大连",
"cnty": "中国",
"id": "CN101070201",
"lat": "38.944000",
"lon": "121.576000",
"update": {
"loc": "2015-07-15 10:43",
"utc": "2015-07-15 02:46:14"
}
},
"status": "ok",
"aqi": {
"city": {
"aqi": "71",
"co": "1",
"no2": "75",
"o3": "101",
"pm10": "89",
"pm25": "44",
"qlty": "良",
"so2": "27"
}
},
"alarms": [
{
"level": "橙色",
"stat": "预警中",
"title": "辽宁省大连市气象台发布高温橙色预警",
"txt": "大连市气象台2015年07月14日13时31分发布高温橙色预警信号:预计14日下午至傍晚，旅顺口区局部最高气温将达到37℃以上,请注意防范。
",
"type": "高温"
}
],
"now": {
"cond": {
"code": "100",
"txt": "晴"
},
"fl": "33",
"hum": "28",
"pcpn": "0",
"pres": "1005",
"tmp": "32",
"vis": "10",
"wind": {
"deg": "350",
"dir": "东北风",
"sc": "4-5",
"spd": "11"
}
},
"daily_forecast": [
{
"date": "2015-07-15",
"astro": {
"sr": "04:40",
"ss": "19:19"
},
"cond": {
"code_d": "100",
"code_n": "101",
"txt_d": "晴",
"txt_n": "多云"
},
"hum": "48",
"pcpn": "0.0",
"pop": "0",
"pres": "1005",
"tmp": {
"max": "33",
"min": "24"
},
"vis": "10",
"wind": {
"deg": "192",
"dir": "东南风",
"sc": "4-5",
"spd": "11"
}
},
{
"date": "2015-07-16",
"astro": {
"sr": "04:40",
"ss": "19:18"
},
"cond": {
"code_d": "104",
"code_n": "104",
"txt_d": "阴",
"txt_n": "阴"
},
"hum": "82",
"pcpn": "2.7",
"pop": "82",
"pres": "1008",
"tmp": {
"max": "27",
"min": "23"
},
"vis": "10",
"wind": {
"deg": "116",
"dir": "东南风",
"sc": "4-5",
"spd": "11"
}
},
{
"date": "2015-07-17",
"astro": {
"sr": "04:41",
"ss": "19:17"
},
"cond": {
"code_d": "101",
"code_n": "100",
"txt_d": "多云",
"txt_n": "晴"
},
"hum": "70",
"pcpn": "0.1",
"pop": "11",
"pres": "1006",
"tmp": {
"max": "28",
"min": "22"
},
"vis": "10",
"wind": {
"deg": "172",
"dir": "西风",
"sc": "4-5",
"spd": "11"
}
}
],
"hourly_forecast": [
{
"date": "2015-07-15 10:00",
"hum": "51",
"pop": "0",
"pres": "1006",
"tmp": "32",
"wind": {
"deg": "127",
"dir": "东南风",
"sc": "微风",
"spd": "4"
}
},
{
[/quote]
这个要看你怎么使用这些数据，如果你需要筛选的话，那最好是存储到sqlite，如果每次都是全部拿出来用的话sharedpreference比较方便，对于大量的数据，还是建议sqlite。
yyy000112 2016-07-01
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类似这种Json数据，建议用sharedpreference还是SQLite存储比较好。
HeWeather data service 3.0": [
{
"basic": {
"city": "大连",
"cnty": "中国",
"id": "CN101070201",
"lat": "38.944000",
"lon": "121.576000",
"update": {
"loc": "2015-07-15 10:43",
"utc": "2015-07-15 02:46:14"
}
},
"status": "ok",
"aqi": {
"city": {
"aqi": "71",
"co": "1",
"no2": "75",
"o3": "101",
"pm10": "89",
"pm25": "44",
"qlty": "良",
"so2": "27"
}
},
"alarms": [
{
"level": "橙色",
"stat": "预警中",
"title": "辽宁省大连市气象台发布高温橙色预警",
"txt": "大连市气象台2015年07月14日13时31分发布高温橙色预警信号:预计14日下午至傍晚，旅顺口区局部最高气温将达到37℃以上,请注意防范。
",
"type": "高温"
}
],
"now": {
"cond": {
"code": "100",
"txt": "晴"
},
"fl": "33",
"hum": "28",
"pcpn": "0",
"pres": "1005",
"tmp": "32",
"vis": "10",
"wind": {
"deg": "350",
"dir": "东北风",
"sc": "4-5",
"spd": "11"
}
},
"daily_forecast": [
{
"date": "2015-07-15",
"astro": {
"sr": "04:40",
"ss": "19:19"
},
"cond": {
"code_d": "100",
"code_n": "101",
"txt_d": "晴",
"txt_n": "多云"
},
"hum": "48",
"pcpn": "0.0",
"pop": "0",
"pres": "1005",
"tmp": {
"max": "33",
"min": "24"
},
"vis": "10",
"wind": {
"deg": "192",
"dir": "东南风",
"sc": "4-5",
"spd": "11"
}
},
{
"date": "2015-07-16",
"astro": {
"sr": "04:40",
"ss": "19:18"
},
"cond": {
"code_d": "104",
"code_n": "104",
"txt_d": "阴",
"txt_n": "阴"
},
"hum": "82",
"pcpn": "2.7",
"pop": "82",
"pres": "1008",
"tmp": {
"max": "27",
"min": "23"
},
"vis": "10",
"wind": {
"deg": "116",
"dir": "东南风",
"sc": "4-5",
"spd": "11"
}
},
{
"date": "2015-07-17",
"astro": {
"sr": "04:41",
"ss": "19:17"
},
"cond": {
"code_d": "101",
"code_n": "100",
"txt_d": "多云",
"txt_n": "晴"
},
"hum": "70",
"pcpn": "0.1",
"pop": "11",
"pres": "1006",
"tmp": {
"max": "28",
"min": "22"
},
"vis": "10",
"wind": {
"deg": "172",
"dir": "西风",
"sc": "4-5",
"spd": "11"
}
}
],
"hourly_forecast": [
{
"date": "2015-07-15 10:00",
"hum": "51",
"pop": "0",
"pres": "1006",
"tmp": "32",
"wind": {
"deg": "127",
"dir": "东南风",
"sc": "微风",
"spd": "4"
}
},
{
"date": "2015-07-15 13:00",
"hum": "49",
"pop": "0",
"pres": "1005",
"tmp": "34",
"wind": {
"deg": "179",
"dir": "南风",
"sc": "微风",
"spd": "7"
}
},
{
"date": "2015-07-15 16:00",
"hum": "54",
"pop": "0",
"pres": "1005",
"tmp": "31",
"wind": {
"deg": "216",
"dir": "西南风",
"sc": "微风",
"spd": "6"
}
},
{
"date": "2015-07-15 19:00",
"hum": "62",
"pop": "0",
"pres": "1005",
"tmp": "29",
"wind": {
"deg": "192",
"dir": "西南风",
"sc": "微风",
"spd": "4"
}
},
{
"date": "2015-07-15 22:00",
"hum": "62",
"pop": "0",
"pres": "1006",
"tmp": "26",
"wind": {
"deg": "154",
"dir": "东南风",
"sc": "微风",
"spd": "10"
}
}
],
"suggestion": {
"comf": {
"brf": "较舒适",
"txt": "白天天气晴好，您在这种天气条件下，会感觉早晚凉爽、舒适，午后偏热。"
},
"cw": {
"brf": "较不宜",
"txt": "较不宜洗车，未来一天无雨，风力较大，如果执意擦洗汽车，要做好蒙上污垢的心理准备。"
},
"drsg": {
"brf": "炎热",
"txt": "天气炎热，建议着短衫、短裙、短裤、薄型T恤衫等清凉夏季服装。"
},
"flu": {
"brf": "少发",
"txt": "各项气象条件适宜，发生感冒机率较低。但请避免长期处于空调房间中，以防感冒。"
},
"sport": {
"brf": "较适宜",
"txt": "天气较好，但风力较大，推荐您进行室内运动，若在户外运动请注意防风。"
},
"trav": {
"brf": "适宜",
"txt": "天气较好，是个好天气哦。稍热但是风大，能缓解炎热的感觉，适宜旅游，可不要错过机会呦！"
},
"uv": {
"brf": "强",
"txt": "紫外线辐射强，建议涂擦SPF20左右、PA++的防晒护肤品。避免在10点至14点暴露于日光下。"
}
}
}
]
开发者_android 2016-06-28
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个人觉得，可以直接把list通过流的形式转换成字符串，然后保存到sp中，读取时，再以流的形式读取objcet，直接强转成list.
保存：
ByteArrayOutputStream baos = new ByteArrayOutputStream(3000);
ObjectOutputStream oos=null;
oos = new ObjectOutputStream(baos);
oos.writeObject(List);
String newWord = new String(Base64.encodeBase64(baos.toByteArray()));
读取：
byte[] base64Bytes = Base64.decodeBase64(wordBase64 .getBytes());
ByteArrayInputStream bais = new ByteArrayInputStream(base64Bytes);
ObjectInputStream ois;
ois = new ObjectInputStream(bais);
List<?,?> result = (List<?,?>) ois.readObject();
这种形式，我在项目中使用过，可用。
yyy000112 2016-06-27
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你的代码不是有WeatherInfo wIf = gson.fromJson(s, WeatherInfo.class);这一句吗，直接保存s就行了[/quote]
转成list也是只能一次性取出来吗，，
jklwan 2016-06-23
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你的代码不是有WeatherInfo wIf = gson.fromJson(s, WeatherInfo.class);这一句吗，直接保存s就行了
睡精灵 2016-06-22
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我试了一下在 saveDailyForecast方法里加上这段for(int I = 0; I<7;i++){
editor.putString("date_daily_"+i, date);
}
for (int i = 0; i < 7; i++) {
DailyForecast dailyForecast = dailyForecasts.get(i);
String date = dailyForecasts.get(i).getDate();
Astro astro = dailyForecasts.get(i).getAstro();
.......
saveDailyForecast......
SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(MyApplication.getContext());
Log.d("Test", sp.getString("date_daily" + i, ""));
这样子可以把每个date都打印出来
}
当把SharedPreferences sp 这段拿到循环外时，我不管把I设定成多少数值，都只能打印出最后一个数据，也就是第七个[/quote]
我试了一下在 saveDailyForecast方法里加上这段for(int I = 0; I<7;i++){
editor.putString("date_daily_"+i, date);
}
for (int i = 0; i < 7; i++) {
DailyForecast dailyForecast = dailyForecasts.get(i);
String date = dailyForecasts.get(i).getDate();
Astro astro = dailyForecasts.get(i).getAstro();
.......
saveDailyForecast......
SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(MyApplication.getContext());
Log.d("Test", sp.getString("date_daily" + i, ""));
这样子可以把每个date都打印出来
}
当把SharedPreferences sp 这段拿到循环外时，我不管把I设定成多少数值，都只能打印出最后一个数据，也就是第七个[/quote]
当然要放到循环里面了，放循环后面就是一条。[/quote]
要是把json存储到SharedPreferences 里面该怎么写，提取时可以很方便的把每个数据都提出来吗[/quote]
就是把整个数据转成json字符串存储，取的时候也只能一起取出来，不能一个一个取。如果数据量大的话建议用sqlite。
yyy000112 2016-06-22
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能否写个小示例让我参考一下呀
jklwan 2016-06-22
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直接存json字符串，取的时候转成list就行了。
睡精灵 2016-06-21
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我试了一下在 saveDailyForecast方法里加上这段for(int I = 0; I<7;i++){
editor.putString("date_daily_"+i, date);
}
for (int i = 0; i < 7; i++) {
DailyForecast dailyForecast = dailyForecasts.get(i);
String date = dailyForecasts.get(i).getDate();
Astro astro = dailyForecasts.get(i).getAstro();
.......
saveDailyForecast......
SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(MyApplication.getContext());
Log.d("Test", sp.getString("date_daily" + i, ""));
这样子可以把每个date都打印出来
}
当把SharedPreferences sp 这段拿到循环外时，我不管把I设定成多少数值，都只能打印出最后一个数据，也就是第七个[/quote]
我试了一下在 saveDailyForecast方法里加上这段for(int I = 0; I<7;i++){
editor.putString("date_daily_"+i, date);
}
for (int i = 0; i < 7; i++) {
DailyForecast dailyForecast = dailyForecasts.get(i);
String date = dailyForecasts.get(i).getDate();
Astro astro = dailyForecasts.get(i).getAstro();
.......
saveDailyForecast......
SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(MyApplication.getContext());
Log.d("Test", sp.getString("date_daily" + i, ""));
这样子可以把每个date都打印出来
}
当把SharedPreferences sp 这段拿到循环外时，我不管把I设定成多少数值，都只能打印出最后一个数据，也就是第七个[/quote]
当然要放到循环里面了，放循环后面就是一条。
yyy000112 2016-06-21
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我试了一下在 saveDailyForecast方法里加上这段for(int I = 0; I<7;i++){
editor.putString("date_daily_"+i, date);
}
for (int i = 0; i < 7; i++) {
DailyForecast dailyForecast = dailyForecasts.get(i);
String date = dailyForecasts.get(i).getDate();
Astro astro = dailyForecasts.get(i).getAstro();
.......
saveDailyForecast......
SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(MyApplication.getContext());
Log.d("Test", sp.getString("date_daily" + i, ""));
这样子可以把每个date都打印出来
}
当把SharedPreferences sp 这段拿到循环外时，我不管把I设定成多少数值，都只能打印出最后一个数据，也就是第七个[/quote]
我试了一下在 saveDailyForecast方法里加上这段for(int I = 0; I<7;i++){
editor.putString("date_daily_"+i, date);
}
for (int i = 0; i < 7; i++) {
DailyForecast dailyForecast = dailyForecasts.get(i);
String date = dailyForecasts.get(i).getDate();
Astro astro = dailyForecasts.get(i).getAstro();
.......
saveDailyForecast......
SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(MyApplication.getContext());
Log.d("Test", sp.getString("date_daily" + i, ""));
这样子可以把每个date都打印出来
}
当把SharedPreferences sp 这段拿到循环外时，我不管把I设定成多少数值，都只能打印出最后一个数据，也就是第七个[/quote]
当然要放到循环里面了，放循环后面就是一条。[/quote]
要是把json存储到SharedPreferences 里面该怎么写，提取时可以很方便的把每个数据都提出来吗
yyy000112 2016-06-20
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我试了一下在 saveDailyForecast方法里加上这段for(int I = 0; I<7;i++){
editor.putString("date_daily_"+i, date);
}
for (int i = 0; i < 7; i++) {
DailyForecast dailyForecast = dailyForecasts.get(i);
String date = dailyForecasts.get(i).getDate();
Astro astro = dailyForecasts.get(i).getAstro();
.......
saveDailyForecast......
SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(MyApplication.getContext());
Log.d("Test", sp.getString("date_daily" + i, ""));
这样子可以把每个date都打印出来
}
当把SharedPreferences sp 这段拿到循环外时，我不管把I设定成多少数值，都只能打印出最后一个数据，也就是第七个
yyy000112 2016-06-20
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editor.putString("date_daily_"+i, date); 这一段是不是要套一个循环
for(int I = 0; I<7;i++){
editor.putString("date_daily_"+i, date);
}
睡精灵 2016-06-20
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你这样往里面存储数据是不行的，最终保存的数据只有最后一条。你可以直接把json字符串保存进去，然后在读取，也可以使用索引，但是你的put的时候key要加上索引，比如：editor.putString("date_daily_"+i, date);
