Php 读取具有用户ID的所有mysql数据库项

大家好，我正在实现一种读取所有mysql数据库项并在listview中显示它的方法，但是带有一个WHERE子句（

SELECT*FROM tb\u class\u record WHERE讲师\u id='？'

）类似的东西。 我的目标是当我以'INST-20131296'的ID登录时，只显示ID为'INST-20131296'的项目。与其他ID不同的用户相同。这是您可以看到的主页，我使用“INST-20131296”ID登录

这是类记录页面，其中填充了项

我的问题是，当我登录到填充的listview时，它会显示具有不同ID的所有项目。我想要的是，它应该显示具有我的用户ID的项目，例如INST-20131296

以下是我的php脚本：

<?php   
$link = mysql_pconnect("localhost", "root", "") or die("Could not connect");
mysql_select_db("dbmobile_class_record") or die("Could not select database");

$arr = array();

$rs = mysql_query("SELECT * FROM tb_class_record ");

while($obj = mysql_fetch_object($rs)) {
$arr[] = $obj;
}
echo '{"class_records":'.json_encode($arr).'}';
?>

这是我的java文件

public class ClassRecord extends AppCompatActivity {
    private ListView mylistView;
    String text;
    TextView inst_id, desc, sc, sched,hour, day, room, acad;
    FloatingActionButton fab;
    ArrayList<HashMap<String, String>> classrecordList = new ArrayList<HashMap<String, String>>();

    private static String url = "http://192.168.0.106/MobileClassRecord/getClassRecord.php";

    private static final String TAG_CR = "class_records";
    private static final String TAG_ID = "instructor_id";
    private static final String TAG_DESC = "description";
    private static final String TAG_SC = "subj_code";
    private static final String TAG_SCHED = "sched_type";
    private static final String TAG_HOUR = "hour";
    private static final String TAG_DAY = "day";
    private static final String TAG_RM = "room";
    private static final String TAG_ACAD = "acad";

    JSONArray classrecord = null;


    @Override
    public void onBackPressed() {
        Intent intent = new Intent(ClassRecord.this, MainActivity.class);
        startActivity(intent);
        super.onBackPressed();
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_class_record);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);

        fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent fabIntent = new Intent(ClassRecord.this, AddClassRecord.class);
                startActivity(fabIntent);

            }
        });
        new JSONParse().execute();
        classrecordList =new ArrayList<HashMap<String, String>>();

    }

    class JSONParse extends AsyncTask<String, String, JSONObject>{
        private ProgressDialog pDialog;

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            inst_id = (TextView) findViewById(R.id.inst_id);
            desc = (TextView) findViewById(R.id.desc);
            sc = (TextView) findViewById(R.id.subj_code);
            sched= (TextView) findViewById(R.id.sched);
            hour=(TextView) findViewById(R.id.hour);
            day=(TextView) findViewById(R.id.day);
            room = (TextView) findViewById(R.id.room);
            acad = (TextView) findViewById(R.id.acad);
            pDialog = new ProgressDialog(ClassRecord.this);
            pDialog.setMessage("Getting Data from Database...");
            pDialog.setIndeterminate(false);
            pDialog.setCancelable(true);
            pDialog.show();
        }

        @Override
        protected JSONObject doInBackground(String... params) {
            JSONParser jParser = new JSONParser();

            JSONObject json = jParser.getJSONFromUrl(url);
            return json;
        }

        @Override
        protected void onPostExecute(JSONObject jsonObject) {
            pDialog.dismiss();
            try {
                classrecord = jsonObject.getJSONArray(TAG_CR);
                for (int i = 0; i < classrecord.length(); i++){
                    JSONObject c = classrecord.getJSONObject(i);

                    final String Inst_id = c.getString(TAG_ID);
                    String Desc = c.getString(TAG_DESC);
                    String Sc = c.getString(TAG_SC);
                    String Sched = c.getString(TAG_SCHED);
                    String Hour = c.getString(TAG_HOUR);
                    String Day = c.getString(TAG_DAY);
                    String Rm = c.getString(TAG_RM);
                    String Acad = c.getString(TAG_ACAD);

                    HashMap<String, String> map = new HashMap<String, String>();

                    map.put(TAG_ID, Inst_id);
                    map.put(TAG_DESC, Desc);
                    map.put(TAG_SC, Sc);
                    map.put(TAG_SCHED, Sched);
                    map.put(TAG_HOUR, Hour);
                    map.put(TAG_DAY, Day);
                    map.put(TAG_RM, Rm);
                    map.put(TAG_ACAD, Acad);

                    classrecordList.add(map);

                    mylistView = (ListView) findViewById(R.id.list);
                    FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
                    fab.attachToListView(mylistView);
                    ListAdapter adapter = new SimpleAdapter(ClassRecord.this, classrecordList,
                            R.layout.list, new String[]{TAG_ID, TAG_DESC, TAG_SC, TAG_SCHED, TAG_HOUR, TAG_DAY, TAG_RM, TAG_ACAD},
                            new int[]{R.id.inst_id, R.id.desc, R.id.subj_code, R.id.sched, R.id.hour, R.id.day, R.id.room, R.id.acad});

                    mylistView.setAdapter(adapter);
                    mylistView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                        @Override
                        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                                    String DESC = ((TextView) (view.findViewById(R.id.desc))).getText().toString();
                                    String CODE = ((TextView) (view.findViewById(R.id.subj_code))).getText().toString();
                                    SharedPreferences preferences = getSharedPreferences("MyApp", MODE_PRIVATE);
                                    preferences.edit().putString("desc", DESC).commit();
                                    preferences.edit().putString("code", CODE).commit();
                                    Intent intent = new Intent(ClassRecord.this, SpecificClassRecord.class);
                                    startActivity(intent);

                        }
                    });
                }
            }catch (JSONException e){
                e.printStackTrace();
            }
        }
    }




    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_class_record, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {

        switch (item.getItemId()){
            case android.R.id.home:
                Intent intent = new Intent(ClassRecord.this, MainActivity.class);
                startActivity(intent);
                return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

公共类ClassRecord扩展了AppCompative活动{
私有列表视图mylistView；
字符串文本；
TextView仪表id、描述、sc、计划、小时、日、房间、acad；
浮动操作按钮；
ArrayList classrecordList=新建ArrayList（）；
专用静态字符串url=”http://192.168.0.106/MobileClassRecord/getClassRecord.php";
私有静态最终字符串标记\u CR=“class\u记录”；
专用静态最终字符串标记\u ID=“讲师\u ID”；
私有静态最终字符串标记_DESC=“description”；
私有静态最终字符串标记\u SC=“subc\u code”；
私有静态最终字符串标记_SCHED=“SCHED_type”；
私有静态最终字符串标记_HOUR=“HOUR”；
私有静态最终字符串标记_DAY=“DAY”；
专用静态最终字符串标记\u RM=“房间”；
私有静态最终字符串标记_ACAD=“ACAD”；
JSONArray classrecord=null；
@凌驾
public void onBackPressed（）{
意向意向=新意向（ClassRecord.this，MainActivity.class）；
星触觉（意向）；
super.onBackPressed（）；
}
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity\u class\u记录）；
getSupportActionBar（）.setDisplayHomeAsUpEnabled（true）；
fab=（FloatingActionButton）findViewById（R.id.fab）；
fab.setOnClickListener（新视图.OnClickListener（）{
@凌驾
公共void onClick（视图v）{
Intent fabIntent=新的Intent（ClassRecord.this，AddClassRecord.class）；
星触觉；
}
});
新建JSONParse（）.execute（）；
classrecordList=新的ArrayList（）；
}
类JSONParse扩展了异步任务{
私人对话；
@凌驾
受保护的void onPreExecute（）{
super.onPreExecute（）；
inst_id=（TextView）findViewById（R.id.inst_id）；
desc=（TextView）findViewById（R.id.desc）；
sc=（TextView）findViewById（R.id.subc_代码）；
sched=（TextView）findViewById（R.id.sched）；
小时=（文本视图）findViewById（R.id.hour）；
day=（TextView）findViewById（R.id.day）；
房间=（文本视图）findViewById（R.id.room）；
acad=（TextView）findViewById（R.id.acad）；
pDialog=newprogressdialog（ClassRecord.this）；
setMessage（“从数据库获取数据…”）；
pDialog.setUndeterminate（假）；
pDialog.setCancelable（真）；
pDialog.show（）；
}
@凌驾
受保护的JSONObject doInBackground（字符串…参数）{
JSONParser jParser=新的JSONParser（）；
JSONObject json=jParser.getJSONFromUrl（url）；
返回json；
}
@凌驾
受保护的void onPostExecute（JSONObject JSONObject）{
pDialog.disclose（）；
试一试{
classrecord=jsonObject.getJSONArray（TAG_-CR）；
对于（int i=0；i/* Create your mysqli connection */
$dbhost =   'localhost';
$dbuser =   'root'; 
$dbpwd  =   'xxx'; 
$dbname =   'mydb';

$conn   =   new mysqli( $dbhost, $dbuser, $dbpwd, $dbname );

$arr=array();

/* Prepare your sql & bind the placeholder */
$sql='select 
            `class_records`,
            `instructor_id`,
            `description`,
            `subj_code`,
            `sched_type`,
            `hour`,
            `day`,
            `room`,
            `acad` 
            from `tb_class_record` where `id`=?';

$stmt=$conn->prepare( $sql );
$stmt->bind_param('s', $id );

/*
  assuming you can append the Java ID variable to the url....
  private static String url = "http://192.168.0.106/MobileClassRecord/getClassRecord.php?id=<ID_VAR>";
*/

/* How are you passing the value of ID to PHP? via GET or POST? */
$id=$_GET['id'];

$res=$stmt->execute();

$stmt->bind_result( $class_records, $instructor_id, $description, $subj_code, $sched_type, $hour, $day, $room, $acad );


if( $res ){
    $stmt->fetch();

    $arr['class_records']=array(
        'class_records'=>$class_records,
        'instructor_id'=>$instructor_id,
        'description'=>$description,
        'subj_code'=>$subj_code,
        'sched_type'=>$sched_type,
        'hour'=>$hour,
        'day'=>$day,
        'room'=>$room,
        'acad'=>$acad
    );      
}

$stmt->close();
$conn->close();


/* Send the json response */
echo json_encode( $arr );

/*

*/

<?php   
error_reporting(0);
$link = mysql_pconnect("localhost", "root", "") or die("Could not connect");
mysql_select_db("dbmobile_class_record") or die("Could not select database");

// array for JSON response
$response = array();

$id=$_GET['instructor_id'];
// get all items from tb_class_record table
$result = mysql_query("SELECT * FROM tb_class_record WHERE instructor_id = '$id'") or die(mysql_error());

if (mysql_num_rows($result) > 0) {

    $response["class_records"] = array();

    while ($row = mysql_fetch_array($result)) {
            // temp user array
            $class_record = array();
            $class_record["class_record_id"] = $row["class_record_id"];
            $class_record["instructor_id"] = $row["instructor_id"];
            $class_record["subj_code"] = $row["subj_code"];
            $class_record["description"] = $row["description"];
            $class_record["sched_type"] = $row["sched_type"];
            $class_record["hour"] = $row["hour"];
            $class_record["day"] = $row["day"];
            $class_record["room"] = $row["room"];
            $class_record["acad"] = $row["acad"];

            // push recorded items into response array
            array_push($response["class_records"], $class_record);
           }
      // success
     $response["success"] = 1;
}
else {
    // class_record is empty
      $response["success"] = 0;
      $response["message"] = "No Records Found";
}
// echoing JSON response
echo json_encode($response);

?>