使用Gson時，必須要先下載Google提供的Json編譯
下載點 :
Gson
JSON 編譯網站 :
連結
在專案底下的lib放gson-2.2.1.jar檔案
在專案底Properties->Java Build Path->Libraries->Add JARs(同上行位置)
在專案底Properties->Java Build Path->Libraries->Order and Export ( gson打勾 )
activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="com.example.gson.MainActivity"
tools:ignore="MergeRootFrame" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Large Text"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
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User.java
package com.example.gson;
public class User {
private String username ;
private int errcode;
private int userId ;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public int getErrcode() {
return errcode;
}
public void setErrcode(int errcode) {
this.errcode = errcode;
}
public int getUserId() {
return userId;
}
public void setUserId(int userId) {
this.userId = userId;
}
}
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MainActivity.java
package com.example.gson;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
import com.google.gson.Gson;
public class MainActivity extends Activity {
TextView textview01;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textview01 = (TextView) findViewById(R.id.textView1);
String jsonData = "{\"errcode\":888,\"username\":\"arthinking\",\"userId\":999}";
Gson gson = new Gson();
User user = gson.fromJson(jsonData, User.class);
textview01.setText(user.getErrcode()+"\n"+user.getUsername()+"\n"+user.getUserId());
}
}
----------------------------------------
[
{
"name":"Beagle",
"colors":["black","white","tan"]
},
{
"name":"Dalmation",
"colors":["white","black"]
}
]
class Dog {
String name;
String[] colors;
}
Gson gson = new Gson();
Dog[] dogs = gson.fromJson(input, Dog[].class);
資料來源 : http://blog.patrickbaumann.com/2011/11/gson-array-deserialization/
