我是Android开发的新手。我将JSON数据从Android发送到我的PHP服务器。
MainActivity.java
public class MainActivity extends Activity implements OnClickListener {
FlyOutContainer root;
private static final String TAG_POSTS = "posts";
String sideMenu[] = { "Place New Report", "My Reports", "Short By",
"Water", "Road", "Electricity", "Construstion",
"Waste Disposal and Electricity", "Nearby Reports", "Others",
"Settings" };
FlyOutContainer fly;
int l;
JSONArray mComments = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
l=1;
final String READ_COMMENTS_URL = "http://sanoawaz.orgfree.com/comments2.php";
JSONParser jParser = new JSONParser();
Log.d("good", "tillhere2");
JSONObject jsoni = jParser.getJSONFromUrl(READ_COMMENTS_URL);
Log.d("good", "tillhere3");
try {
mComments = jsoni.getJSONArray(TAG_POSTS);
l = mComments.length();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
l = 10;
}
JSONParser.java
package com.sdmple.flybar;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URLEncodedUtils;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;
import android.util.Log;
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
public JSONObject getJSONFromUrl(final String url) {
// Making HTTP request
try {
// Construct the client and the HTTP request.
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
// Execute the POST request and store the response locally.
HttpResponse httpResponse = httpClient.execute(httpPost);
// Extract data from the response.
HttpEntity httpEntity = httpResponse.getEntity();
// Open an inputStream with the data content.
is = httpEntity.getContent();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
Log.e("Buffer Error", "Error converting result " + e.toString());
} catch (ClientProtocolException e) {
e.printStackTrace();
Log.e("Buffer Error", "Error converting result " + e.toString());
} catch (IOException e) {
e.printStackTrace();
Log.e("Buffer Error", "Error converting result " + e.toString());
}
try {
// Create a BufferedReader to parse through the inputStream.
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
// Declare a string builder to help with the parsing.
StringBuilder sb = new StringBuilder();
// Declare a string to store the JSON object data in string form.
String line = null;
// Build the string until null.
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
json = sb.toString().substring(0, sb.toString().length() - 1);
}
// Close the input stream.
is.close();
// Convert the string builder data to an actual string.
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// Try to parse the string to a JSON object
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// Return the JSON Object.
return jObj;
}
// function get json from url
// by making HTTP POST or GET mehtod
public JSONObject makeHttpRequest(String url, String method,
List<NameValuePair> params) {
// Making HTTP request
try {
// check for request method
if(method == "POST"){
// request method is POST
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new UrlEncodedFormEntity(params));
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
}else if(method == "GET"){
// request method is GET
DefaultHttpClient httpClient = new DefaultHttpClient();
String paramString = URLEncodedUtils.format(params, "utf-8");
url += "?" + paramString;
HttpGet httpGet = new HttpGet(url);
HttpResponse httpResponse = httpClient.execute(httpGet);
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 JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON String
return jObj;
}
public JSONObject getJSONFromUrl2(final String url) {
// Making HTTP request
try {
// Construct the client and the HTTP request.
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
// Execute the POST request and store the response locally.
HttpResponse httpResponse = httpClient.execute(httpPost);
// Extract data from the response.
HttpEntity httpEntity = httpResponse.getEntity();
// Open an inputStream with the data content.
is = httpEntity.getContent();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
Log.e("Buffer Error", "Error converting result " + e.toString());
} catch (ClientProtocolException e) {
e.printStackTrace();
Log.e("Buffer Error", "Error converting result " + e.toString());
} catch (IOException e) {
e.printStackTrace();
Log.e("Buffer Error", "Error converting result " + e.toString());
}
try {
// Create a BufferedReader to parse through the inputStream.
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
// Declare a string builder to help with the parsing.
StringBuilder sb = new StringBuilder();
// Declare a string to store the JSON object data in string form.
String line = null;
// Build the string until null.
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
// Close the input stream.
is.close();
// Convert the string builder data to an actual string.
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// Try to parse the string to a JSON object
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// Return the JSON Object.
return jObj;
}
}
我得到JSONObject jsoni = jParser.getJSONFromUrl（READ_COMMENTS_URL）;
Comments2.php
<?php
require("config2.inc.php");
//initial query
$query = "Select * FROM posts";
//execute query
try {
$stmt = $db->prepare($query);
$result = $stmt->execute();
}
catch (PDOException $ex) {
$response["success"] = 0;
$response["message"] = "Database Error!";
die(json_encode($response));
}
$rows = $stmt->fetchAll();
if ($rows) {
$response["success"] = 1;
$response["message"] = "Post Available!";
$response["posts"] = array();
foreach ($rows as $row) {
$post = array();
$post["username"] = $row["username"];
$post["location"] = $row["location"];
$post["discreption"] = $row["discreption"];
//update our repsonse JSON data
array_push($response["posts"], $post);
}
// echoing JSON response
echo json_encode($response);
} else {
$response["success"] = 0;
$response["message"] = "No Post Available!";
die(json_encode($response));
}
?>
logcat的
05-01 07:15:01.859: D/Login Successful!(1531): {"message":"Login successful!","success":1}
05-01 07:15:02.407: D/good(1531): tillhere2
05-01 07:15:02.407: D/AndroidRuntime(1531): Shutting down VM
05-01 07:15:02.407: W/dalvikvm(1531): threadid=1: thread exiting with uncaught exception (group=0xa4c46648)
05-01 07:15:02.407: E/AndroidRuntime(1531): FATAL EXCEPTION: main
05-01 07:15:02.407: E/AndroidRuntime(1531): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.sdmple.flybar/com.sdmple.flybar.MainActivity}: android.os.NetworkOnMainThreadException