請問各位高手 這樣語法上有問題嗎??

<?php
require_once("SQL_data.php");
$insert_new=isset($_POST["id"])<>NULL?$_POST["id"]:"null";
$insert_new1=isset($_POST["password"])<>NULL?$_POST["password"]:"null";
mysql_select_db($database,$GD);
$sql = "select* from user where id='$id' and password='$password'";
$Result=mysql_query($sql,$GD) or die(mysql_error());
$rows=mysql_num_rows($Result);
if($rows){
	$key=true;
    echo "true";
}
else{
	$key=false;
    echo "false";
}
mysql_close();
exit();
?>

接下來是我想要讓android 收到這段值 讓我判定是否可以登入

android要收到值

String result =dblogin.executeQuery(id,password);
 try{
      JSONArray jsonArray = new JSONArray(result);
      }
      catch....
      {
      }

如果你php判斷有這帳號，那result就不會是空的
錯了result=null，就知道無此帳號

神威抱歉請問一下
dblogin.executeQuery(id,password);
請問這個的dblogin來自哪裡?
還有這個是寫在第一張圖的地方沒錯吧??

對
我的dblogin等於你的loginphp
求關注
直接PO我以前寫的程式碼給你參考:

Login.java:

public class Login extends AppCompatActivity {
    private TextView acc,pwd;
  
    String mycart="",account="",names="",passwd="";
  
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.login);
        getSupportActionBar().setDisplayShowTitleEnabled(false);
        StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
                .detectDiskReads()
                .detectDiskWrites()
                .detectNetwork()
                .penaltyLog()
                .build());
        StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()
                .detectLeakedSqlLiteObjects()
                .penaltyLog()
                .penaltyDeath()
                .build());
       
        acc=(TextView)findViewById(R.id.acc);
        pwd=(TextView)findViewById(R.id.pwd);
        btn=(ImageView)findViewById(R.id.btn);
        btn.setOnClickListener(btnlogin);

    }

    private ImageView.OnClickListener btnlogin=new ImageView.OnClickListener(){
        public void onClick(View v){
            String account=acc.getText().toString();
            String passwd=pwd.getText().toString();
           
            String result =dblogin.executeQuery(account,passwd);

            try{
                JSONArray jsonArray = new JSONArray(result);

                for(int i = 0; i < jsonArray.length(); i++) 
                {	 JSONObject jsonData = jsonArray.getJSONObject(i);
                    String name=jsonData.getString("name");
                    String email=jsonData.getString("email");
                  
                        Intent intent= new Intent();//轉跳另一頁，並顯示帳密及信箱
                        intent.setClass(Login.this, nextpage.class);
                        Bundle bundle=new Bundle();
                        bundle.putString("ACCOUNT", account);
                        bundle.putString("NAME", name);
                        bundle.putString("EMAIL", email);
                        intent.putExtras(bundle);
                        startActivity(intent);
                   
                }
            }

            catch(Exception e){}
        }
    };

}

dblogin.java

public class dblogin {
    public static String executeQuery(String account,String passwd) {
        String result = ""; 
       
        try {   
            HttpClient httpClient = new DefaultHttpClient();
            HttpPost httpPost = new HttpPost("http://aaaa.xxxx/login.php");
            ArrayList<NameValuePair> params = new ArrayList<NameValuePair>();
            params.add(new BasicNameValuePair("account", account));
            params.add(new BasicNameValuePair("passwd",passwd));
            httpPost.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));
            HttpResponse httpResponse = httpClient.execute(httpPost);
            //view_account.setText(httpResponse.getStatusLine().toString());
            HttpEntity httpEntity = httpResponse.getEntity();
            InputStream inputStream = httpEntity.getContent();
            
            BufferedReader bufReader = new BufferedReader(new InputStreamReader(inputStream, "utf-8"), 8);
            StringBuilder builder = new StringBuilder();
            String line = null;
            while((line = bufReader.readLine()) != null) {
                builder.append(line + "\n");
            }
            inputStream.close();
            result = builder.toString();
        } catch(Exception e) {
            // Log.e("log_tag", e.toString());
        }
        
        return result;
    }
}

php

<?php
require_once("db.php");//db.php就是php連資料庫那支程式，你應該懂吧，我就不放了
$account=$_POST['account'];
$passwd=$_POST['passwd'];
$sql = "select* from user where account= '$account' and passwd='$passwd'";
$q=mysqli_query($db,$sql);
while($e=mysqli_fetch_assoc($q))
$output[]=$e;
print(json_encode($output));
mysqli_close($q);
  
?>

神威 傷心 我沒辦法執行
我有幾個問題請教一下
請問你這樣連不是需要cookie嗎?
Android Main
我將這邊改成EditView
acc=(TextView)findViewById(R.id.acc);
pwd=(TextView)findViewById(R.id.pwd);

dblogin
我匯入的

import cz.msebera.android.httpclient.HttpEntity;
import cz.msebera.android.httpclient.HttpResponse;
import cz.msebera.android.httpclient.NameValuePair;
import cz.msebera.android.httpclient.client.HttpClient;
import cz.msebera.android.httpclient.client.entity.UrlEncodedFormEntity;
import cz.msebera.android.httpclient.client.methods.HttpPost;
import cz.msebera.android.httpclient.impl.client.DefaultHttpClient;
import cz.msebera.android.httpclient.message.BasicNameValuePair;
import cz.msebera.android.httpclient.protocol.HTTP;

php的部分 我只改以下

$sql = "select* from user where id= '$account' and password='$passwd'";