Android开发-Volley-解析Json使用方法-4-完整Demo-AndroidStudio

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.iwanghang.volleydemo">

<!-- 网络权限 -->
<uses-permission android:name="android.permission.INTERNET" />

<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>

</manifest>

package com.iwanghang.volleydemo;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import com.iwanghang.volleydemo.Volley4Json.VolleyCallBack;

public class MainActivity extends Activity implements OnClickListener{

private Button button_volley_1; // 测试按钮一 解析标题和简介
private Button button_volley_2; // 测试按钮二 解析标题
private Button button_volley_3; // 测试按钮三 显示原始json串
private TextView textView_content; // 显示结果

private String title;
private String allTitle = "";
private String desc;
private String allDesc = "";
private String td;
private String allTd = "";

private Volley4Json volley4Json;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

button_volley_1 = (Button) findViewById(R.id.button_volley_1); // 测试按钮一 解析标题和简介
button_volley_2 = (Button) findViewById(R.id.button_volley_2); // 测试按钮二 解析标题
button_volley_3 = (Button) findViewById(R.id.button_volley_3); // 测试按钮三 显示原始json串
textView_content = (TextView) findViewById(R.id.textView_content); // 显示结果

button_volley_1.setOnClickListener(this); // 测试按钮一 解析标题和简介 点击监听
button_volley_2.setOnClickListener(this); // 测试按钮二 解析标题 点击监听
button_volley_3.setOnClickListener(this); // 测试按钮三 显示原始json串 点击监听

volley4Json = new Volley4Json(this);
}

@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.button_volley_1: // 测试按钮一 解析标题和简介
// 获取Json
volley4Json.getJsonResult(new VolleyCallBack() {
@Override
public void onSuccess(JSONObject result) {
// 测试按钮一 解析标题和简介
try {
JSONArray jsonArray = result.getJSONArray("data");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject object2 = jsonArray.getJSONObject(i);
Log.e("TAG", object2.getString("title"));
title = object2.getString("title");
desc = object2.getString("desc");
td = "《" + object2.getString("title") + "》" + object2.getString("desc");
allTd = allTd + "" + i + "." +  td  + "\n\n";
}
textView_content.setText(allTd);
} catch (JSONException e) {
e.printStackTrace();
}
}
});
break;
case R.id.button_volley_2: // 测试按钮二 解析标题
// 获取Json
volley4Json.getJsonResult(new VolleyCallBack() {
@Override
public void onSuccess(JSONObject result) {
// 测试按钮二 解析标题
try {
JSONArray jsonArray = result.getJSONArray("data");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject obj2 = jsonArray.getJSONObject(i);
Log.e("TAG", obj2.getString("title"));
title = obj2.getString("title");
allTitle = allTitle + "" + i + "." +  title  + "\n\n";
}
textView_content.setText(allTitle);
} catch (JSONException e) {
e.printStackTrace();
}
}
});
break;
case R.id.button_volley_3: // 测试按钮三 显示原始json串
// 获取Json
volley4Json.getJsonResult(new VolleyCallBack() {
@Override
public void onSuccess(JSONObject result) {
textView_content.setText(result.toString());
}
});
break;
}
}

}

package com.iwanghang.volleydemo;

import android.content.Context;

import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonObjectRequest;
import com.android.volley.toolbox.Volley;

import org.json.JSONObject;

public class Volley4Json {

public static Context context;
public Volley4Json(Context context){
this.context = context;
}

/**
* 获取Json
*/
public static void getJsonResult(final VolleyCallBack volleyCallBack) {
// 初始化一个请求队列
RequestQueue requestQueue = Volley.newRequestQueue(context);
// json串: http://www.ytiantuan.com//api.php/index/index.html String jsonUrl = "http://api.zsreader.com/v2/pub/channel/list?&page=1&tp=1&size=20";
// 根据给定的URL新建一个请求
JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.GET, jsonUrl, null, new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
// 在这里操作UI组件是安全的，因为响应返回时这个函数会被post到UI线程来执行
// 在这里尽情蹂躏响应的response。

volleyCallBack.onSuccess(response);

//成功的回调
//System.out.println("成功返回:"+ response.toString());
}
}, new Response.ErrorListener(){
@Override
public void onErrorResponse(VolleyError error) {
// 出错了怎么办？凉拌！并且在这里拌。
System.out.println("发生了一个错误！");
error.printStackTrace();
}
});
// 把这个请求加入请求队列
requestQueue.add(jsonObjectRequest);
}

/**
* VolleyCallback
*/
public interface VolleyCallBack{
void onSuccess(JSONObject result);
}
}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">

<!-- 测试按钮 -->
<RelativeLayout
android:id="@+id/button_layout"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<Button
android:id="@+id/button_volley_1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="解析标题和简介"/>
<Button
android:id="@+id/button_volley_2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="解析标题"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
<Button
android:id="@+id/button_volley_3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="显示原始json串"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true" />
</RelativeLayout>

<TextView
android:id="@+id/textView_content"
android:layout_below="@+id/button_layout"
android:text="内容"
android:layout_width="match_parent"
android:layout_height="match_parent" />

</RelativeLayout>