我正在嘗試使用Gson庫獲取json中的參數(shù)。 這個想法是捕捉和。但我不知道如何獲得這些值，目前我創(chuàng)建了以下內(nèi)容： items>item>image>images>transparenttransparenttransparent_blanktransparent_darkjson{ "date_layout":"day-month-year", "lastupdate":1547596830, "items":[{ "name":"Cleans Cuts", "featured":"true", "item":{ "image":"http:www.domain.com/unwanted_image.jpg", "images":{ "transparent":"http:www.domain.com/desired_image1.jpg", "transparent_blank":"http:www.domain.com/desired_image2.jpg", "transparent_dark":"http:www.domain.com/desired_image3.jpg" } } }, { "name":"Cleans Cuts", "featured":"true", "item":{ "image":"http:www.domain.com/unwanted_image.jpg", "images":{ "transparent":"http:www.domain.com/desired_image1.jpg", "transparent_blank":"http:www.domain.com/desired_image2.jpg", "transparent_dark":"http:www.domain.com/desired_image3.jpg" } } }]}。主要活動public class MainActivity extends AppCompatActivity {@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main);String url = "http://www.example.com/file.json";Request request = new Request.Builder() .url(url) .build();Response response = client.newCall(request).execute(); if(response.isSuccessful()){ String response_jSon = response.body().string(); Gson gson = new Gson(); Datos datosFinal = gson.fromJson(response_jSon, Datos.class); for (int i=0; i<datosFinal.items.size(); i++){ Log.d("msg_2", datosFinal.items.get(i).name); }}而且我只能訪問您在 .MainActivity 日志中看到的項目。Json 的類對象達托斯.javapublic class Datos { public String date_layout; public Int lastupdate; List<items> items;}項目.javapublic class items { public String name;}
3 回答
元芳怎么了
TA貢獻1798條經(jīng)驗 獲得超7個贊
json 不是很干凈，我建議你重新設計這個 json 字符串的生成方式，但是如果你仍然想在不重新處理 json 的情況下獲得這些值，你需要將你的Items類更改為：
`public class items {
public String name;
public String featured;
public Item item;
}`
然后您需要創(chuàng)建另一個名為Item的類
`public class Item{
public String image;
public Image images;
}`
您還需要創(chuàng)建一個Image類，如下所示：
`public class Image {
public String transparent;
public String transparent_blank;
public String transparent_dark;
}`
然后您可以在循環(huán)中記錄這些值：
`Datos datosFinal = gson.fromJson(response_jSon, Datos.class);
for (int i=0; i<datosFinal.items.size(); i++){
Log.d("msg_2", datosFinal.items.get(i).item.images.transparent);
Log.d("msg_2", datosFinal.items.get(i).item.images.transparent_blank);
Log.d("msg_2", datosFinal.items.get(i).item.images.transparent_dark);
}`
雖然這可能有效，但我強烈建議您重新編寫 json 并使其更易于維護。
汪汪一只貓
TA貢獻1898條經(jīng)驗 獲得超8個贊
你必須使用
public class items {
public String name;
@Expose(serialize = false, deserialize = false)
public String featured;
@Expose(serialize = false, deserialize = false)
public item mItem;
}
public class item {
@Expose(serialize = false, deserialize = false)
public String image;
@Expose(serialize = false, deserialize = false)
public images mImages;
}
public class images {
@Expose(serialize = false, deserialize = false)
public String transparent;
@Expose(serialize = false, deserialize = false)
public String transparent_blank;
@Expose(serialize = false, deserialize = false)
public String transparent_dark;
}
您可以使用http://www.jsonschema2pojo.org/生成 pojo
一只甜甜圈
TA貢獻1836條經(jīng)驗 獲得超5個贊
您還必須創(chuàng)建以下類以獲得透明、透明空白和透明暗的價值
Images.java
項目.java
替換這個類：
public class Items{
private Item item;
private String name;
private String featured;
public Item getItem ()
{
return item;
}
public void setItem (Item item)
{
this.item = item;
}
public String getName ()
{
return name;
}
public void setName (String name)
{
this.name = name;
}
public String getFeatured ()
{
return featured;
}
public void setFeatured (String featured)
{
this.featured = featured;
}
}
添加這個類：
public class Images{
private String transparent_blank;
private String transparent_dark;
private String transparent;
public String getTransparent_blank ()
{
return transparent_blank;
}
public void setTransparent_blank (String transparent_blank)
{
this.transparent_blank = transparent_blank;
}
public String getTransparent_dark ()
{
return transparent_dark;
}
public void setTransparent_dark (String transparent_dark)
{
this.transparent_dark = transparent_dark;
}
public String getTransparent ()
{
return transparent;
}
public void setTransparent (String transparent)
{
this.transparent = transparent;
}
}
另外，添加這個類：
public class Item {
private Images images;
private String image;
public Images getImages ()
{
return images;
}
public void setImages (Images images)
{
this.images = images;
}
public String getImage ()
{
return image;
}
public void setImage (String image)
{
this.image = image;
}
}
現(xiàn)在，您將使用 getter 方法獲取值。
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