Android应用程式Json [英] Android app Json
问题描述
我正在编写android应用并遇到问题.
I writing android app and faced problem.
我有API并将其写入文件.
I have API and write it to file.
写作守则
string url2 = "http://new.murakami.ua/?mkapi=getProducts";
JsonValue json = await FetchAsync(url2);
string path = System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal);
string filename = System.IO.Path.Combine(path, "myfile.txt");
using (var streamWriter = new StreamWriter(filename, true))
{
streamWriter.Write(json.ToString());
streamWriter.Close();
}
ParseAndDisplay1(json);
ParseAndDisplay2(json);
ParseAndDisplay3(json);
ParseAndDisplay4(json);
ParseAndDisplay5(json);
ParseAndDisplay6(json);
ParseAndDisplay7(json);
ParseAndDisplay8(json);
}
private async Task<JsonValue> FetchAsync(string url)
{
// Create an HTTP web request using the URL:
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(new Uri(url));
request.ContentType = "application/json";
request.Method = "GET";
// Send the request to the server and wait for the response:
using (WebResponse response = await request.GetResponseAsync())
{
// Get a stream representation of the HTTP web response:
using (Stream stream = response.GetResponseStream())
{
// Use this stream to build a JSON document object:
JsonValue jsonDoc = await Task.Run(() => JsonObject.Load(stream));
//dynamic data = JObject.Parse(jsonDoc[15].ToString);
Console.Out.WriteLine("Response: {0}", jsonDoc.ToString());
// Return the JSON document:
return jsonDoc;
}
}
}
我想从中读取信息并显示.
I want to read information from it and display.
我尝试了类似的方法，但是没有用.
I tried something like this, but it don't works.
private void ParseAndDisplay1(JsonValue json)
{
TextView productname = FindViewById<TextView> (Resource.Id.posttittle);
TextView price = FindViewById<TextView> (Resource.Id.price);
TextView weight = FindViewById<TextView> (Resource.Id.weight);
productname.Click += delegate {
var intent404 = new Intent (this, typeof(SoupesDetailActivity1));
StartActivity (intent404);
};
string path = System.Environment.GetFolderPath (System.Environment.SpecialFolder.Personal);
string filename = System.IO.Path.Combine (path, "myfile.txt");
using (var streamReader = new StreamReader (filename, true)) {
JsonValue firstitem = json [81];
productname.Text = firstitem ["post_title"];
price.Text = firstitem ["price"] + " грн";
weight.Text = firstitem ["weight"] + "г";
}
}
您能帮我解决这个问题吗?
Can you help me with this problem?
推荐答案
正在使用Xamarin的人.但是这里有一些技巧，告诉我如何在Android本机代码中解决它.
Man you are using Xamarin. But here some tips of how I solve it in Android native code.
- 我将文件保存在Assets文件夹中；
- 他们以.json扩展名而不是.txt的身份保存了这笔交易.
-
我使用以下代码访问了它:
- I saved the file in the Assets folder;
- them saved the fale with .json extension not .txt;
I accessed it using this code:
private static String loadJSONFromAsset(Context context, String fileName) {
String json = null;
try {
InputStream is = context.getAssets().open("contactos/" + fileName + ".json");
int size = is.available();
byte[] buffer = new byte[size];
is.read(buffer);
is.close();
json = new String(buffer);
} catch (IOException ex) {
ex.printStackTrace();
return null;
}
return json;
}
private static String loadJSONFromAsset(Context context, String fileName) {
String json = null;
try {
InputStream is = context.getAssets().open("contactos/" + fileName + ".json");
int size = is.available();
byte[] buffer = new byte[size];
is.read(buffer);
is.close();
json = new String(buffer);
} catch (IOException ex) {
ex.printStackTrace();
return null;
}
return json;
}
之后，我毫无问题地解析JSON.
After that I parse the JSON with no problem.
它运行完美，希望对您有所帮助.
And it works perfectly, I hope it will help you.
这篇关于Android应用程式Json的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
