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我正在做一個項目，開始在Android。我試圖從mySQL數據庫讀取以及閱讀。 一切工作正常，但我只是從數據庫中讀取一行。 有誰知道爲什麼？Android JSON和php
這是我的任務是讀書，你只需要看看呼叫到的onCreate（），GetAllCostumberTask 和SetTextToview（）方法。
package com.example.ultimate;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
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.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends ActionBarActivity {
private TextView responseTextView;
private EditText eNombre,eApellido,eEdad,eMovil;
private Button b1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.responseTextView = (TextView) this.findViewById(R.id.responseTextView);
this.eNombre = (EditText) this.findViewById(R.id.editNombre);
this.eApellido = (EditText) this.findViewById(R.id.editApellido);
this.eEdad = (EditText) this.findViewById(R.id.editEdad);
this.eMovil = (EditText) this.findViewById(R.id.editMovil);
this.b1 = (Button) this.findViewById(R.id.button1);
new GetAllCustomerTask().execute(new ApiConnector());
}
public void funcion(View v){
if((eNombre.getText().toString().length()<1)
||(eApellido.getText().toString().length()<1)
||(eEdad.getText().toString().length()<1)
||(eMovil.getText().toString().length()<1)){
// out of range
Toast.makeText(this, "please enter something", Toast.LENGTH_LONG).show();
}else{
String[] lista = new String[4];
lista[0] = eNombre.getText().toString();
lista[1] = eApellido.getText().toString();
lista[2] = eEdad.getText().toString();
lista[3] = eMovil.getText().toString();
new MyAsyncTask().execute(lista);
}
}
public void setTextToTextView(JSONArray jsonArray)
{
String s = "";
for(int i=0; i<jsonArray.length();i++){
JSONObject json = null;
try {
json = jsonArray.getJSONObject(i);
s = s +
"Name : "+json.getString("FirstName")+" "+json.getString("LastName")+"\n"+
"Age : "+json.getInt("Age")+"\n"+
"Mobile Using : "+json.getString("Mobile")+"\n\n";
// Toast.makeText(getApplicationContext(), "paso", Toast.LENGTH_LONG).show();
} catch (JSONException e) {
e.printStackTrace();
}
}
this.responseTextView.setText(s);
}
private class MyAsyncTask extends AsyncTask<String, Integer, Double>{
@Override
protected Double doInBackground(String... params) {
// TODO Auto-generated method stub
postData(params);
return null;
}
protected void onPostExecute(Double result){
Toast.makeText(getApplicationContext(), "command sent", Toast.LENGTH_LONG).show();
}
protected void onProgressUpdate(Integer... progress){
}
public void postData(String[] valueIWantToSend) {
// Create a new HttpClient and Post Header
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://accessibility.es/prueba/insert.php");
try {
// Add your data
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("FirstName", valueIWantToSend[0]));
nameValuePairs.add(new BasicNameValuePair("LastName", valueIWantToSend[1]));
nameValuePairs.add(new BasicNameValuePair("Age", valueIWantToSend[2]));
nameValuePairs.add(new BasicNameValuePair("Movil", valueIWantToSend[3]));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
// Execute HTTP Post Request
HttpResponse response = httpclient.execute(httppost);
} catch (ClientProtocolException e) {
Toast.makeText(getApplicationContext(), "Error", Toast.LENGTH_LONG).show();
} catch (IOException e) {
Toast.makeText(getApplicationContext(), "Error", Toast.LENGTH_LONG).show();
}catch(Exception e){
Toast.makeText(getApplicationContext(), "Error", Toast.LENGTH_LONG).show();
}
}
}
private class GetAllCustomerTask extends AsyncTask<ApiConnector,Long,JSONArray>
{
@Override
protected JSONArray doInBackground(ApiConnector... params) {
// it is executed on Background thread
return params[0].GetAllCustomers();
}
@Override
protected void onPostExecute(JSONArray jsonArray) {
setTextToTextView(jsonArray);
}
}
}
這裏是我的ApiConnector
package com.example.ultimate;
import android.util.Log;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
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 java.io.IOException;
public class ApiConnector {
public JSONArray GetAllCustomers()
{
// URL for getting all customers
String url = "http://accessibility.es/prueba/script.php";
// Get HttpResponse Object from url.
// Get HttpEntity from Http Response Object
HttpEntity httpEntity = null;
try
{
DefaultHttpClient httpClient = new DefaultHttpClient(); // Default HttpClient
HttpGet httpGet = new HttpGet(url);
HttpResponse httpResponse = httpClient.execute(httpGet);
httpEntity = httpResponse.getEntity();
} catch (ClientProtocolException e) {
// Signals error in http protocol
e.printStackTrace();
//Log Errors Here
} catch (IOException e) {
e.printStackTrace();
}
// Convert HttpEntity into JSON Array
JSONArray jsonArray = null;
if (httpEntity != null) {
try {
String entityResponse = EntityUtils.toString(httpEntity);
Log.e("Entity Response : ", entityResponse);
jsonArray = new JSONArray(entityResponse);
} catch (JSONException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
return jsonArray;
}
}
以默認值的PHP腳本。對不起，忘了
<?php
$con = $con = mysql_connect("localhost","xxxx","xxxx");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
mysql_select_db("TestDatabase", $con);
$result = mysql_query("SELECT * FROM Customer");
while($row = mysql_fetch_assoc($result))
{
$output[]=$row;
}
print(json_encode($output));
mysql_close($con);
?>
不能因聲譽鏈接圖片，我想。
好的，我現在正在調試它。我發現這個代碼沒有按預期工作。我的意思是，s String沒有更新自己，只保存第一行，但不保存其他行。 任何人都認爲s = s +「」有問題？
for(int i=0; i<jsonArray.length();i++){
JSONObject json = null;
try {
json = jsonArray.getJSONObject(i);
s = s +
"Name : "+json.getString("FirstName")+" "+json.getString("LastName")+"\n"+
"Age : "+json.getInt("Age")+"\n"+
"Mobile Using : "+json.getString("Mobile")+"\n\n";
// Toast.makeText(getApplicationContext(), "paso", Toast.LENGTH_LONG).show();
} catch (JSONException e) {
e.printStackTrace();
}
}
print（json_encode（$ output））; ...嘗試在網頁上，如果它只返回1行嘗試做一個循環並在發送之前爆炸數組 – 2014-12-03 16:55:37
完成後，它會返回每個值。所以它不是腳本 – 2014-12-03 16:58:41
如果它不在PHP中，那麼在Android上。 – 2014-12-03 17:00:28