Student_details

package com.example.faceattendancev20;

import android.app.Activity;
import android.app.ListActivity;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;

import java.util.ArrayList;

public class Subject_details extends ListActivity
{
    private ListView mSubjectListView;
    private AttendanceDatabase mDatabase;

    private SubjectAdapter mAdapter;

    private static final String TAG = "Subject_details";

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_subject_details);

        mSubjectListView = (ListView)findViewById(android.R.id.list);
        mDatabase = new AttendanceDatabase(Subject_details.this);
        mAdapter = new SubjectAdapter(mDatabase.getAllSubjects());

        if (!mAdapter.isEmpty() && mAdapter!=null){

            mSubjectListView.setAdapter(mAdapter);
        }else{


            mSubjectListView.setAdapter(mAdapter);
            mSubjectListView.setOnItemClickListener(mAdapter);

        }
    }

    @Override
    protected void onResume()
    {
        super.onResume();
        mAdapter.setData(mDatabase.getAllSubjects());
        mAdapter.notifyDataSetChanged();
    }

    @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_subject_details, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item)
    {
        int id=item.getItemId();
        switch (id)
        {
            case R.id.action_new_subject:
            {
                Intent intent =new Intent(this,AddSubjectActivity.class);
                startActivity(intent);
                break;
            }
        }
        return super.onOptionsItemSelected(item);


    }


    public class SubjectAdapter extends BaseAdapter implements AdapterView.OnItemClickListener {
        private ArrayList<Subject> mList;

        public SubjectAdapter(Cursor data) {
            mList = new ArrayList<Subject>();

            setData(data);
        }

        @Override
        public int getCount() {
            return mList.size();
        }

        @Override
        public Subject getItem(int position) {
            return mList.get(position);
        }

        @Override
        public long getItemId(int position) {
            return getItem(position).id;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            Subject subject = getItem(position);

            if (convertView == null)
                convertView = getLayoutInflater().inflate(R.layout.item_subject, null);

            if (subject != null) {
                TextView subjectCodeTextView = (TextView) convertView.findViewById(R.id.txtSubjectCode);
                TextView subjectNameTextView = (TextView) convertView.findViewById(R.id.txtSubjectName);


                subjectCodeTextView.setText(subject.subjectCode);
                subjectNameTextView.setText(subject.subjectName);
            }

            return convertView;
        }

        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            int REQUEST_CODE = 0;
            Subject subject = getItem(position);

            Log.d(TAG, String.format("Subject Clicked: %s - %s", subject.subjectCode, subject.subjectName));

            Intent intent = new Intent(Subject_details.this, AddSubjectActivity.class);
            intent.putExtra("subjectCode", subject.subjectCode);
            intent.putExtra("subjectName", subject.subjectName);
            intent.putExtra("creditHour", subject.creditHour);
            startActivityForResult(intent, REQUEST_CODE);
        }


        public void setData(Cursor data) {
            mList.clear();

            data.moveToFirst();

            do {
                String subjectCode = data.getString(data.getColumnIndex(AttendanceDatabase.COLUMN_SUBJECT_CODE));
                String subjectName = data.getString(data.getColumnIndex(AttendanceDatabase.COLUMN_SUBJECT_NAME));
                String creditHour = data.getString(data.getColumnIndex(AttendanceDatabase.COLUMN_SUBJECT_CREDIT_HOUR));


                Subject subject = new Subject(0, subjectCode, subjectName, creditHour);

                mList.add(subject);
            } while (data.moveToNext());
        }
    }

    public class Subject
    {
        int id;
        String subjectCode;
        String subjectName;
        String creditHour;




        public Subject(int id, String subjectCode, String subjectName,String creditHour)//,String[] sections
        {
            this.id = id;
            this.subjectCode = subjectCode;
            this.subjectName = subjectName;
            this.creditHour=creditHour;


            //TODO: section name.

        }
    }

}