我在android中创建程序以从我的本地站点获取数据并显示数据 列表视图,但我在程序中有一些问题,我无法显示数据 在列表视图中
这是我的代码:
这是android studio中连接到我的列表视图和我的本地站点的代码:
import CommonCrypto
我的列表视图:
#import
这是我自定义列表视图的代码:
package com.example.delta.social_food;
import android.app.ListActivity;
import android.content.Context;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.lang.reflect.Array;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.util.Arrays;
/**
* Created by delta on 5/8/2016.
*/
public class Shared_food_list extends ListActivity {
String[] username,description;
String tusername,tdescription;
private int page=1;
private int count;
private String res="";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.shared_food_list);
new getpost().execute();
}
private void makearray(int c){
username=new String[c];
description=new String[c];
Arrays.fill(username,"");
}
public class getpost extends AsyncTask{
@Override
protected Object doInBackground(Object[] params) {
try {
String data= URLEncoder.encode("txt_page", "UTF8")+"="+URLEncoder.encode(page+"","UTF8");
URL link=new URL("http://192.168.1.4/social_food/main/show_food_list");
URLConnection connect=link.openConnection();
connect.setDoOutput(true);
OutputStreamWriter wr=new OutputStreamWriter(connect.getOutputStream());
wr.write(data);
wr.flush();
BufferedReader reader=new BufferedReader(new InputStreamReader(connect.getInputStream()));
StringBuilder sb=new StringBuilder();
String line=null;
while((line=reader.readLine())!=null){
sb.append(line);
}
res=sb.toString();
for(int y=0;y<4;y++){
if(res.charAt(y)=='|'){
count=Integer.parseInt(res.substring(0,y));
res=res.substring(y+1);
break;
}
}
makearray(count);
int f=0,c=0;
for(int i=0;i<res.length();i++){
if(res.charAt(i)=='|'){
String temp=res.substring(f,i);
if(c==0){
tusername=temp;
}
if(c==1){
tdescription=temp;
for(int t=0;t<count;t++){
if(username[t].equals("")){
username[t]=tusername;
description[t]=tdescription;
break;
}
}
c=-1;
}
f=i+1;
c+=1;
}
}
}catch (Exception e){
res=e.toString();
}
return "";
}
@Override
protected void onPostExecute(Object o) {
super.onPostExecute(o);
setListAdapter(new IA());
}
}
public class IA extends ArrayAdapter<String>{
public IA() {
super(Shared_food_list.this, R.layout.show_list,username);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater in=getLayoutInflater();
View row=in.inflate(R.layout.show_list, parent, false);
TextView users=(TextView)findViewById(R.id.show_list_username);
TextView desc=(TextView)findViewById(R.id.show_list_message);
users.setText(username[position]);
desc.setText(description[position]);
return (row);
}
}
}
这是我的php站点代码,带有codeigniter:
控制器代码:
<?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">
<ListView
android:id="@android:id/list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal" />
</LinearLayout>
型号代码:
<?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/textAppearanceLarge"
android:text="User Name"
android:id="@+id/show_list_username" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Message"
android:id="@+id/show_list_message"
android:layout_gravity="right" />
和我的观看代码:
public function show_food_list(){
$page = $this -> input -> post('txt_page');
if($page=="1"){
$this -> load -> model('Database','model');
$data['infos'] = $this -> model -> get_food_list();
}
$this -> load -> view('food',$data);
}
答案 0 :(得分:0)
来自stackoverflow link 如果您在Android工作室模拟器上运行应用程序,请使用IP地址http://10.0.2.1或http://10.0.2.2。 否则,如果在genymotion上运行,请使用http://10.0.3.2。