Android-JSON Example 1 and Example 2

JSON Example 1

Core code in mainactivity. Java

Private string jsondata = "{\" Name \ ": \" Michael \ ", \" Age \ ": 20 }";

 

Mainactivity. Java

 1 import android.app.Activity; 2 import android.os.Bundle; 3 import android.view.View; 4 import android.view.View.OnClickListener; 5 import android.widget.Button; 6  7 public class MainActivity extends Activity { 8    private Button button = null; 9    private String jsonData = "{\"name\":\"Michael\",\"age\":20}";10 11     public void onCreate(Bundle savedInstanceState) {12         super.onCreate(savedInstanceState);13         setContentView(R.layout.main);14         button = (Button)findViewById(R.id.buttonId);15         button.setOnClickListener(new ButtonListener());16     }17     18     private class ButtonListener implements OnClickListener{       19         public void onClick(View v){20             JsonUtils jsonUtils = new JsonUtils();21             jsonUtils.pareseUserFromJson(jsonData);22         }23     }24     25     26 }

 

 

 

User. Java

 1 public class User {     2     private String name; 3     private String age; 4  5     public String getName() { 6         return name; 7     } 8     public void setName(String name) { 9         this.name = name;10     }11     public String getAge() {12         return age;13     }14     public void setAge(String age) {15         this.age = age;16     }17 }

 

 

Jsonutils. Java

Import COM. google. gson. gson; public class jsonutils {public void pareseuserfromjson (string jsondata) {gson = new gson (); // The first parameter is a JSON data // The second parameter specifies the class object to which the data is converted: User user = gson. fromjson (jsondata, user. class); system. out. println ("name --->" + User. getname (); system. out. println ("age --->" + User. getage ());}}

For the complete code, see download _19_json02.rar.

　　

 

JSON Example 2

Core code in mainactivity. Java

Private string jsondata = "[{\" Name \ ": \" Michael \ ", \" Age \ ": 20 },{ \" Name \": \ "Mike \", \ "Age \": 21}] ";

 

Mainactivity. Java

 1 public class MainActivity extends Activity { 2    private Button button = null; 3    private String jsonData = "[{\"name\":\"Michael\",\"age\":20},{\"name\":\"Mike\",\"age\":21}]"; 4  5     public void onCreate(Bundle savedInstanceState) { 6         super.onCreate(savedInstanceState); 7         setContentView(R.layout.main); 8         button = (Button)findViewById(R.id.buttonId); 9         button.setOnClickListener(new ButtonListener());10     }11     12     private class ButtonListener implements OnClickListener{       13         public void onClick(View v){14             JsonUtils jsonUtils = new JsonUtils();15             jsonUtils.pareseUserFromJson(jsonData);16         }17     }18     19     20 }

 

User. Java

 1 public class User {     2     private String name; 3     private String age; 4  5     public String getName() { 6         return name; 7     } 8     public void setName(String name) { 9         this.name = name;10     }11     public String getAge() {12         return age;13     }14     public void setAge(String age) {15         this.age = age;16     }17 }

 

Jsonutils. Java

/*** What should I do if I want to convert a JSON array into a series of user objects? **/Public class jsonutils {public void pareseuserfromjson (string jsondata) {// here typetoken <shortlist <user> () {} contains braces because it is an interface, but there is no class type listtype = new typetoken <shortlist <user >> (){}. getType (); gson = new gson (); // when there are many Add/delete operations on the shortlist and few query operations, the shortlist <user> Users = gson. fromjson (jsondata, listtype); For (iterator = users. iterator (); iterator. hasnext ();) {user = (User) iterator. next (); system. out. println ("name --->" + User. getname (); system. out. println ("age --->" + User. getage ());}}}

　　

For the complete code, see download _19_json03.rar.