json_TypeToken

package com.example.day_18json_typetoken;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.lang.reflect.Type;

import java.util.List;

import android.app.Activity;

import android.os.Bundle;

import android.widget.Toast;

import com.google.gson.Gson;

import com.google.gson.reflect.TypeToken;

public class MainActivity extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

Gson gson=new Gson();

try {

InputStream inputStream = getAssets().open("json.json");

Type type=new TypeToken<List<Bean>>(){

}.getType();

//TypeToken的泛型是什么,就转成什么类型的

List<Bean> list=gson.fromJson(new InputStreamReader(inputStream,"utf-8"), type);

for (Bean bean : list) {

Toast.makeText(this, bean.toString(), 0).show();

System.out.println(bean.toString());

}

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

=====================================================================

/**

*

*/

package com.example.day_18json_typetoken;

import java.util.List;

/**

* @author WJL

*

*/

public class Bean {

public String id;

public String name;

public List<Student> students;

@Override

public String toString() {

return "Bean [id=" + id + ", name=" + name + ", students=" + students + "]";

}

}

============================================================================

/**

*

*/

package com.example.day_18json_typetoken;

/**

* @author WJL

*

*/

public class Student {

public String age;

public String id;

public String name;

public String sex;

@Override

public String toString() {

return "Student [age=" + age + ", id=" + id + ", name=" + name

+ ", sex=" + sex + "]";

}

}