【发布时间】：2013-08-02 00:31:23
【问题描述】：
我正在尝试从 JSON::
显示列表视图中的元素JsonURL-https://dl.dropboxusercontent.com/s/rhk01nqlyj5gixl/jsonparsing.txt?token_hash=AAHpfauVxJaC9Rkx_5abNtJnPFG04os7TZky1AhOuC5jEw
activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<ListView
android:id="@+id/listViewID"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_gravity="center">
</ListView>
</LinearLayout>
JSONParser.java
package com.example.testjson;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.util.Log;
public class JSONParser {
static InputStream is = null;
static JSONArray jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
public JSONArray getJSONFromUrl(String url) {
// Making HTTP request
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// try parse the string to a JSON object
try {
jObj = new JSONArray(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON String
return jObj;
}
}
row.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/relativelay"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:id="@+id/tvname"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginLeft="5dip"
android:maxLines="1"
android:text="Name"
android:textColor="@android:color/black"
android:textSize="14dp"
android:textStyle="bold" >
</TextView>
<TextView
android:id="@+id/tvcity"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/tvname"
android:layout_marginLeft="5dip"
android:layout_marginTop="3dip"
android:maxLines="1"
android:text="City"
android:textColor="@android:color/black"
android:textSize="14dp" >
</TextView>
<TextView
android:id="@+id/tvbdate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/tvcity"
android:layout_marginLeft="5dip"
android:layout_marginTop="3dip"
android:maxLines="1"
android:text="Birthdate"
android:textColor="@android:color/black"
android:textSize="14dp" >
</TextView>
<TextView
android:id="@+id/tvgender"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_marginRight="15dip"
android:maxLines="1"
android:text="Gender"
android:textColor="@android:color/black"
android:textSize="14dp"
android:textStyle="bold" >
</TextView>
<TextView
android:id="@+id/tvage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_below="@+id/tvgender"
android:layout_marginRight="15dip"
android:layout_marginTop="3dip"
android:maxLines="1"
android:text="Age"
android:textColor="@android:color/black"
android:textSize="14dp" >
</TextView>
</RelativeLayout>
MainActivity.java
package com.example.testjson;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.os.Bundle;
import android.app.Activity;
import android.text.StaticLayout;
import android.view.Menu;
public class MainActivity extends Activity {
private static String url="https://www.dropbox.com/s/rhk01nqlyj5gixl/jsonparsing.txt?dl=1";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//Create a JSON parser Instance ----- Used JSON parser from Android
JSONParser jParser=new JSONParser();
//Getting JSON string from URL ------ Used JSON Array from Android
JSONArray json=jParser.getJSONFromUrl(url);
try {
for(int i=0;i<json.length();i++)
{
JSONObject c=json.getJSONObject(i);// Used JSON Object from Android
//Storing each Json in a string variable
int AGE=c.getInt("age");
String NAME=c.getString("name");
String CITY=c.getString("city");
String GENDER=c.getString("Gender");
String BIRTHDATE=c.getString("birthdate");
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
- 我正在尝试将数据从 JSON 填充到 listView，一些
填写不明确
MainActivity.java - 该功能使用什么集合？
- 任何想法，这看起来很简单，但对于像我这样的初学者来说 努力学习
谢谢，
【问题讨论】：
-
好问题！ ....即使我正在寻找这样的东西......以及对问题的良好解释！......将等待答案！
标签： android json parsing listview