如何解析Android中的多个Json值？

  • Z时代
  • 2024-01-10
  • 分类：问答

我试过多次使用Volley库。如何解析Android中的多个Json值？

的JSON值链接：here

我的Android代码来解析值：here

public class GetUSGSjson extends AppCompatActivity 
{ 
    GridView jsonGridView; 
    ListView jsonListView; 
    Button jsonGetBtn; 
    RequestQueue USGSrequestqueue; 
    String USGSurl = "https://earthquake.usgs.gov/fdsnws/event/1/query?format=geojson&starttime=2016-01-01&endtime=2016-01-31&minmag=6&limit=10"; 
    ArrayList<String> mArrayList; 
    ArrayList<String>FK; 
    JsonObjectRequest USGSjsonObjectReq; 
    JSONObject _properties_; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) 
    { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.json_data); 
     jsonGridView = (GridView) findViewById(R.id.jsonGridView); 
     jsonGetBtn = (Button) findViewById(R.id.jsonGetBtn); 
     USGSrequestqueue = Volley.newRequestQueue(this); 
     mArrayList = new ArrayList<>(); 
     FK = new ArrayList<>(); 
     jsonGridView.setVisibility(View.GONE); 
    }

按钮

public void USGSgetData(View view) 
    { 
     jsonGridView.setVisibility(View.VISIBLE); 
     USGSjsonObjectReq = new JsonObjectRequest(Request.Method.GET,USGSurl,null, 
     new Response.Listener<JSONObject>() 
     { 
      @Override 
      public void onResponse(JSONObject response) 
      { 
       try { 
        JSONObject _features_ = response.getJSONObject("features"); 
        JSONArray _f_ = response.getJSONArray("features"); 
        for (int x = 0; x < _f_.length(); x++) 
        { 
         JSONObject currentFeature = _f_.getJSONObject(x); 
         _properties_ = currentFeature.getJSONObject("properties"); //JsonObject 
         double mag = _properties_.getDouble("mag"); 
         long time = _properties_.getLong("time"); 
         String place = _properties_.getString("place"); 
         mArrayList.add(String.valueOf(mag)); 
         mArrayList.add(String.valueOf(time)); 
         mArrayList.add(place); 
         ArrayAdapter VarrayAdapter = new ArrayAdapter<>(GetUSGSjson.this 
          ,android.R.layout.simple_list_item_1, mArrayList); 
         jsonGridView.setAdapter(VarrayAdapter); 
        } catch (JSONException e) 
        { 
         e.printStackTrace(); 
         Toast.makeText(GetUSGSjson.this, "Exception: "+e.getMessage(), Toast.LENGTH_LONG).show(); 
        } 
       } 
      }, 
      new Response.ErrorListener() 
      { 
       @Override 
       public void onErrorResponse(VolleyError error) 
       { 
        Toast.makeText(GetUSGSjson.this, "onErrorResponse: "+error.getMessage(), Toast.LENGTH_LONG).show(); 
       } 
      } 
      ); 
      USGSrequestqueue.add(USGSjsonObjectReq); 
     } 
    }

回答：

试试这个的OnCllick，

try { 
    JSONArray arr_features=response.getJSONArray("features"); 
    for(int i=0;i<arr_features.length();i++) 
    { 
     JSONObject obj=arr_features.getJSONObject(i); 
     String type=obj.getString("type"); 
     JSONObject obj_properties=obj.getJSONObject("properties"); 
     String mag=obj_properties.getString("mag"); 
     String place=obj_properties.getString("place"); 
     String time=obj_properties.getString("time"); 
     String updated=obj_properties.getString("updated"); 
    } 
} catch (JSONException e) { 
    e.printStackTrace(); 
}

回答：

我发现这种方式来解决我自己的问题 请记住，“MAG”是双形式的“地方” &“类型”是字符串形式&“时间”是一个Unix时间是在长的形式。

try { 
          JSONArray _f_ = response.getJSONArray("features"); 
          for (int x = 0; x < _f_.length(); x++) 
          { 
           JSONObject currentFeature = _f_.getJSONObject(x); 
           _properties_ = currentFeature.getJSONObject("properties"); //JsonObject 
           double mag = _properties_.getDouble("mag"); 
           long time = _properties_.getLong("time"); 
           String place = _properties_.getString("place"); 
           String type = _properties_.getString("type"); 
// To add this on to ArrayList. 
mArrayList.add("Place: "+place+"\n"); 
    mArrayList.add("\nMagnitude: " + String.valueOf(mag)+"\n"); 
    mArrayList.add("\nTime: " + String.valueOf(newTime)+"\n"); 
    mArrayList.add("\nType: " + type+"\n"); 
}

以上是 如何解析Android中的多个Json值？ 的全部内容， 来源链接： utcz.com/qa/265156.html

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