php做介面+android 請求API介面並展示到ListView例子
阿新 • • 發佈：2019-01-05
知識點：
php: 處理json問題，unicode轉碼實現
android:ListView使用與效能優化；handler訊息佇列機制；androidHTTP請求，activity知識等等：
效果如下：
檔案結構：
MainActivity主活動介面展示：
ListActivity 跳轉活動介面展示ListView內容
Person 資料填充實體
PersonAdapter ListView資料介面
Util工具類，負責網路請求以及json解析等
Manifest檔案：
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.tes.api" > <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" android:label="@string/app_name" android:theme="@style/AppTheme.NoActionBar" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".ListActivity"> <intent-filter> <action android:name="android.intent.action.VIEW" /> <category android:name="android.intent.category.DEFAULT" /> </intent-filter> </activity> </application> <uses-permission android:name="android.permission.INTERNET"></uses-permission> </manifest>
主介面兩個按鈕功能：
點選按鈕1獲取textView裡面的id，傳遞id引數，向伺服器發起post請求；獲取結果解析json,展示到按鈕下面的顯示TextView中
點選按鈕2跳轉到第二個意圖，向伺服器發起post請求，將結果填充到ListView中
服務端 api.php:
<?php header("Content-Type:application/json;charset=utf-8"); $result = [ "status" => 200, "msg" => "獲取成功", "result" => [ ["name"=>"zfeig","age"=>26,"address"=>"廣州市天河區車陂天橋11號","study"=>["no"=>"0610832110","teacher"=>"李賢良"]], ["name"=>"lisi","age"=>27,"address"=>"四川省成都市高新區226號","study"=>["no"=>"0610832110","teacher"=>"何潔"]], ["name"=>"王大崔","age"=>25,"address"=>"浙江省杭州市西湖大道120號","study"=>["no"=>"0610732110","teacher"=>"劉德華"]], ["name"=>"劉曉花","age"=>23,"address"=>"福建省廈門市廈門大學路13號","study"=>["no"=>"0610632110","teacher"=>"王明"]], ["name"=>"lisi","age"=>27,"address"=>"四川省成都市高新區226號","study"=>["no"=>"0610832110","teacher"=>"何潔"]], ["name"=>"王大崔","age"=>25,"address"=>"浙江省杭州市西湖大道120號","study"=>["no"=>"0610732110","teacher"=>"劉德華"]], ["name"=>"劉曉花","age"=>23,"address"=>"福建省廈門市廈門大學路13號","study"=>["no"=>"0610632110","teacher"=>"王明"]] ] ]; function encodeCN($result){ foreach ($result as $k => $v) { if(is_array($v)){ $result[$k] = encodeCN($v); }else{ $result[$k] = urlencode($v); } } return $result; } $result = encodeCN($result); echo urldecode(json_encode($result)); ?>
MainActivity.java
package com.example.tes.api; import android.app.Activity; import android.app.ProgressDialog; import android.content.Intent; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.ScrollView; import android.widget.TextView; import android.widget.Toast; public class MainActivity extends Activity implements View.OnClickListener { private static EditText text; private static Button btn; private static Button listBtn; private static TextView tv; private static String info; private static ProgressDialog pd; private final String ADDR = "http://192.168.145.162:8000/api.php"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); btn = (Button) findViewById(R.id.button); listBtn = (Button) findViewById(R.id.button2); tv = (TextView) findViewById(R.id.textView); text = (EditText) findViewById(R.id.editText); btn.setOnClickListener(this); listBtn.setOnClickListener(this); } Handler hander = new Handler(){ @Override public void handleMessage(Message msg) { if(msg.what == 1){ pd.dismiss(); info = msg.obj.toString(); tv.setText(info); } } }; @Override public void onClick(View v) { switch (v.getId()){ case R.id.button : String id =text.getText().toString(); if(id.equals(null) || id.equals("")){ Toast.makeText(this,"請輸入id號",Toast.LENGTH_LONG).show(); }else{ pd = new ProgressDialog(MainActivity.this); pd.setProgressStyle(ProgressDialog.STYLE_SPINNER); pd.setMessage("wait..."); pd.show(); final String Id = id; new Thread(){ @Override public void run() { String msg = Util.httpPost(ADDR,Integer.parseInt(Id)); msg = Util.parseJson2String(msg); Util.sendMsg(hander,new Message(),msg); } }.start(); } break; case R.id.button2: Intent it = new Intent(MainActivity.this,ListActivity.class); startActivity(it); break; } } }
ListActivity.java
package com.example.tes.api;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.widget.ListView;
import android.widget.Toast;
import java.util.Iterator;
import java.util.List;
public class ListActivity extends Activity {
private static String ADDR ="http://192.168.145.162:8000/api.php";
private ListView lv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_list);
lv = (ListView) findViewById(R.id.listView);
initData();
}
Handler hander = new Handler(){
@Override
public void handleMessage(Message msg) {
if(msg.what == 1){
List<Person> data = (List<Person>) msg.obj;
String info = list2str(data);
Toast.makeText(ListActivity.this,"訊息："+info, Toast.LENGTH_LONG).show();
lv.setAdapter(new PersonAdapter(data,ListActivity.this,R.layout.item));
}
}
};
public void initData(){
new Thread(){
@Override
public void run() {
super.run();
String msg = Util.httpPost(ADDR, 1);
List data = Util.parseJson2List(msg);
Util.sendMsg(hander, new Message(), data);
}
}.start();
}
public String list2str(List<Person> list){
StringBuilder sb = new StringBuilder();
Iterator it = list.iterator();
while(it.hasNext()){
Person pr = (Person) it.next();
String name =pr.getName();
int age =pr.getAge();
String address = pr.getAddress();
String no = pr.getNo();
String teacher =pr.getTeacher();
sb.append("姓名："+name+" ");
sb.append("年紀："+age+" ");
sb.append("地址："+address+" ");
sb.append("學號："+no+"\n");
}
return sb.toString();
}
}
Person.java
package com.example.tes.api;
/**
* Created by no1 on 2016/6/25.
*/
public class Person {
private String name;
private int age;
private String address;
private String no;
private String teacher;
public Person(String name, int age, String address, String no, String teacher) {
this.name = name;
this.age = age;
this.address = address;
this.no = no;
this.teacher = teacher;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getNo() {
return no;
}
public void setNo(String no) {
this.no = no;
}
public String getTeacher() {
return teacher;
}
public void setTeacher(String teacher) {
this.teacher = teacher;
}
}
PersonAdapter.java
package com.example.tes.api;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
import java.util.List;
public class PersonAdapter extends BaseAdapter {
private List<Person> data;
private static Context context;
private static int resoureId;
PersonAdapter(List<Person> data,Context context,int resoureId){
this.context = context;
this.data = data;
this.resoureId = resoureId;
}
@Override
public int getCount() {
return data.size();
}
@Override
public Object getItem(int position) {
return data.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder = null;
Person person = data.get(position);
if(convertView == null){
convertView = LayoutInflater.from(context).inflate(resoureId,null);//找到lv佈局
viewHolder = new ViewHolder(convertView);//找到佈局下面的元件並快取起來
convertView.setTag(viewHolder);//快取元件物件
}else{
viewHolder = (ViewHolder) convertView.getTag();//獲取元件物件
}
//元件物件填充資料
viewHolder.name.setText(person.getName());
viewHolder.age.setText("年紀："+person.getAge()+"");
viewHolder.address.setText("家庭住址："+person.getAddress());
viewHolder.no.setText("學號："+person.getNo());
viewHolder.teacher.setText("班主任："+person.getTeacher());
return convertView;
}
public class ViewHolder{
private TextView name;
private TextView age;
private TextView address;
private TextView no;
private TextView teacher;
ViewHolder(View contentView){
this.name = (TextView) contentView.findViewById(R.id.name);
this.age = (TextView) contentView.findViewById(R.id.age);
this.address = (TextView) contentView.findViewById(R.id.address);
this.no = (TextView) contentView.findViewById(R.id.no);
this.teacher = (TextView) contentView.findViewById(R.id.teacher);
}
}
}
Util.java
package com.example.tes.api;
import android.os.Handler;
import android.os.Message;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
public class Util {
/**
* @傳送訊息到訊息佇列中
* @param hander
* @param msg
* @param data
*/
public static void sendMsg(Handler hander,Message msg,String data){
msg.what =1;
msg.obj = data;
hander.sendMessage(msg);
}
/**
* @傳送訊息到訊息佇列中
* @param hander
* @param msg
* @param data
*/
public static void sendMsg(Handler hander,Message msg,List data){
msg.what =1;
msg.obj = data;
hander.sendMessage(msg);
}
/**
* @獲取post請求
* @param url
* @param id
* @return
*/
public static String httpPost(String url,int id){
String params = "act=1";
params = params +"&vid="+id;
String data = null;
HttpURLConnection conn = null;
try{
//get request
URL address = new URL(url);
conn = (HttpURLConnection) address.openConnection();
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-type", "application/x-www-form-urlencoded");
conn.setRequestProperty("Content-Length", String.valueOf(params.getBytes().length));
conn.setDoInput(true);
conn.setDoOutput(true);
conn.getOutputStream().write(params.getBytes());//將引數寫入輸出流
//get outinput
StringBuilder sb = new StringBuilder();
BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String msg = "";
while((msg = br.readLine())!=null){
sb.append(msg);
}
data = sb.toString();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally {
if(conn != null){
conn.disconnect();
}
}
System.out.println("獲取結果為：" + data);
return data;
}
/**
* @get請求
* @param url
* @return
*/
public static String httpGet(String url){
String data = null;
HttpURLConnection conn = null;
try{
URL address = new URL(url);
conn = (HttpURLConnection) address.openConnection();
conn.setRequestMethod("GET");
conn.setDoInput(true);
StringBuilder sb = new StringBuilder();
BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String msg = "";
while((msg = br.readLine())!=null){
sb.append(msg);
}
data = sb.toString();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally {
if(conn != null){
conn.disconnect();
}
}
return data;
}
/**
* @解析json存為字串
* @param data
* @return
*/
public static String parseJson2String(String data){
String result = "";
try{
JSONObject object = new JSONObject(data);
int status = object.getInt("status");
if(status == 200){
JSONArray item = object.getJSONArray("result");
for(int i=0;i<item.length();i++){
JSONObject tmpObj = item.getJSONObject(i);
String name = tmpObj.getString("name");
int age = tmpObj.getInt("age");
String address = tmpObj.getString("address");
JSONObject study = tmpObj.getJSONObject("study");
String no = study.getString("no");
String teacher = study.getString("teacher");
result += "姓名："+name+" 年紀："+age+" 地址："+address+" 學號："+no+" 老師："+teacher+"\n";
}
}else{
result = "獲取結果失敗！";
}
} catch (JSONException e) {
e.printStackTrace();
}
return result;
}
/**
* @解析json儲存為集合
* @param data
* @return
*/
public static List<Person> parseJson2List(String data){
List<Person> result = new ArrayList<Person>();
try{
JSONObject object = new JSONObject(data);
int status = object.getInt("status");
if(status == 200){
JSONArray item = object.getJSONArray("result");
for(int i=0;i<item.length();i++){
JSONObject tmpObj = item.getJSONObject(i);
String name = tmpObj.getString("name");
int age = tmpObj.getInt("age");
String address = tmpObj.getString("address");
JSONObject study = tmpObj.getJSONObject("study");
String no = study.getString("no");
String teacher = study.getString("teacher");
Person person = new Person(name,age,address,no,teacher);
result.add(person);
}
}else{
System.out.println("獲取失敗或無資料！");
}
} catch (JSONException e) {
e.printStackTrace();
}
return result;
}
}
佈局檔案：
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:weightSum="1">
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="請輸入id"
android:id="@+id/editText"
android:layout_gravity="center_horizontal" />
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="5dip"
android:layout_marginBottom="5dip">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dip"
android:layout_marginBottom="20dip"
android:text="查詢"
android:layout_weight="1"
android:id="@+id/button" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dip"
android:layout_marginBottom="20dip"
android:text="資料列表"
android:layout_weight="1"
android:id="@+id/button2" />
</LinearLayout>
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/scrollView"
android:layout_gravity="center_horizontal" >
<TextView
android:layout_width="match_parent"
android:layout_marginTop="20dip"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text=""
android:scrollbars="vertical"
android:hint="顯示結果"
android:id="@+id/textView" />
</ScrollView>
</LinearLayout>activity_list.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="學生通訊錄"
android:textColor="#D50203"
android:textSize="30dip"
android:layout_gravity="center"
android:layout_marginBottom="10dip"
android:id="@+id/textView2" />
<ListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/listView"
android:layout_gravity="center_horizontal" />
</LinearLayout>item.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="Small Text"
android:id="@+id/name" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="Small Text"
android:id="@+id/age" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="Small Text"
android:id="@+id/address" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="Small Text"
android:id="@+id/no" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="Small Text"
android:id="@+id/teacher" />
</LinearLayout>