[英]Android connecting to MySql (PHP Script)
My java code: 我的Java代码:
package com.Cmode.ThesisSystem;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
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.app.ListActivity;
import android.net.ParseException;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;
public class EventLogs extends ListActivity {
JSONArray jArray;
String result = null;
InputStream is = null;
StringBuilder sb=null;
int e_id;
String e_name;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();{
//http post
try{
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://www.my.com/eventlogs.php");
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
}catch(Exception e){
Log.e("log_tag", "Error in http connection"+e.toString());
} }
//convert response to string
try{
BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8);
sb = new StringBuilder();
sb.append(reader.readLine() + "\n");
String line="0";
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
result=sb.toString();
}catch(Exception e){
Log.e("log_tag", "Error converting result "+e.toString());
}
//paring data //准备数据
try{
jArray = new JSONArray(result);
JSONObject json_data=null;
for(int i=0;i<jArray.length();i++){
json_data = jArray.getJSONObject(i);
e_id=json_data.getInt("id");
e_name=json_data.getString("event");
}
}catch(JSONException e1){
Toast.makeText(getBaseContext(), "No events found" ,Toast.LENGTH_LONG).show();
} catch (ParseException e1) {
e1.printStackTrace();
}
}
}
}
I have a problem with this code Error: The application CDroidMonitoring(process.com.Cmode.ThesisSystem) has stopped unexpectedly. 我对此代码有问题错误:应用程序CDroidMonitoring(process.com.Cmode.ThesisSystem)意外停止。 Please try again
请再试一次
Im just new to android development. 我是android开发的新手。 I think I have put something unusable braces or there is something wrong in the code.
我想我在括号中放了一些无法使用的东西,或者在代码中出现了错误。
Does your application have the INTERNET permission set in the manifest? 您的应用程序是否在清单中设置了INTERNET权限? And for more information about the error check the logcat tab in Eclipse, it usually has a more descriptive error message.
有关错误的更多信息,请检查Eclipse中的logcat选项卡,它通常具有更具描述性的错误消息。
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