このコードのエラーを見つけるのを手伝ってください。jsonによってリモートサーバー(php&mysql)からデータを取得したいのですが、それを解析すると、結果がnullを返すという問題がありますが、次のリンクで 名前を返すことになっています:http: //codeincloud.tk/json_android_example.php
package com.shadatv.shada;
import java.io.IOException;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;
public class canticlesActivity extends Activity {
TextView httpStuff;
HttpClient client;
JSONObject json;
final static String URL = "http://codeincloud.tk/json_android_example.php";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.canticles);
httpStuff = (TextView) findViewById(R.id.textView1);
client = new DefaultHttpClient();
new Read().execute("name");
}
public JSONObject lastTweet() throws ClientProtocolException, IOException, JSONException {
StringBuilder url = new StringBuilder(URL);
HttpGet get = new HttpGet(url.toString());
HttpResponse r = client.execute(get);
int status = r.getStatusLine().getStatusCode();
if (status == 200) {
HttpEntity e = r.getEntity();
String data = EntityUtils.toString(e);
JSONArray timeline = new JSONArray(data);
JSONObject last = timeline.getJSONObject(0);
return last;
} else {
Toast.makeText(getBaseContext(), "error", Toast.LENGTH_SHORT);
return null;
}
}
public class Read extends AsyncTask<String, Integer, String>{
@Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
try {
json = lastTweet();
return json.getString(params[0]);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
Toast.makeText(getBaseContext(), "ahmed .. " + result, Toast.LENGTH_LONG).show();
httpStuff.setText(result);
}
}
}