cara membuat aplikasi jadwal di android ~ Computer Stuff

ini tulisan sederhana tentang membuat aplikasi jadwal kuliah di android supaya ga ribet buka galeri dulu baru bisa liat jadwal, ekeke

ini yang kita butuhkan :
1. IDE android (saya pake eclipse Juno)
2. kesabaran

dalam membuat apps ini saya menggunakan referensi adapter dari sini yang dibuat oleh Revi Tamada.

1. Buat sebuah project android baru, File -> New -> Project -> Android Application Project

2. Next terus, saya tetap menggunakan nama default activity nya MainActivity. Klik next sampai finish muncul.

3. Buka activity_main.xml yang ada di res-> layout ->

dan edit seperti berikut ini

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:background="#f4f4f4" >

           ExpandableListView
                android:id="@+id/lvExp"
                android:layout_height="match_parent"
                android:layout_width="match_parent" 

</LinearLayout>

4.Buat file xml baru yang sama-sama berada di bawah folder layout sehingga seperti di gambar atas. Beri 2 nama file tersebut list_group.xml dan list_item.xml.
ketikkan kode berikut untuk list_group.xml

<linearlayout android:background="#000000" 
android:layout_height="wrap_content" 
android:layout_width="fill_parent" 
android:orientation="vertical" 
android:padding="8dp" 
xmlns:android="http://schemas.android.com/apk/res/android">


<textview android:id="@+id/lblListHeader" 
android:layout_height="wrap_content" android:layout_width="fill_parent"
android:paddingleft="?android:attr/expandableListPreferredItemPaddingLeft" 
android:textcolor="#f9f93d" 
android:textsize="17dp">

</textview></linearlayout>

dan ketikkan kode berikut di list_item.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="55dip"

    android:orientation="vertical" >

    <TextView

        android:id="@+id/lblListItem"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:textSize="17dip"

        android:paddingTop="5dp"

        android:paddingBottom="5dp"

        android:paddingLeft="?android:attr/expandableListPreferredChildPaddingLeft" />

</LinearLayout>

5.Buat file class baru dengan nama ExpandableListAdapter.java

ketikkan kode berikut di ExpandableListAdapter.java

package com.example.expandablelist;

import java.util.HashMap;
import java.util.List;
 
import android.content.Context;
import android.graphics.Typeface;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.TextView;
 
public class ExpandableListAdapter extends BaseExpandableListAdapter {
 
    private Context _context;
    private List _listDataHeader; // header titles
    // child data in format of header title, child title
    private HashMap> _listDataChild;
 
    public ExpandableListAdapter(Context context, List listDataHeader,
            HashMap> listChildData) {
        this._context = context;
        this._listDataHeader = listDataHeader;
        this._listDataChild = listChildData;
    }
 
    @Override
    public Object getChild(int groupPosition, int childPosititon) {
        return this._listDataChild.get(this._listDataHeader.get(groupPosition))
                .get(childPosititon);
    }
 
    @Override
    public long getChildId(int groupPosition, int childPosition) {
        return childPosition;
    }
 
    @Override
    public View getChildView(int groupPosition, final int childPosition,
            boolean isLastChild, View convertView, ViewGroup parent) {
 
        final String childText = (String) getChild(groupPosition, childPosition);
 
        if (convertView == null) {
            LayoutInflater infalInflater = (LayoutInflater) this._context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = infalInflater.inflate(R.layout.list_item, null);
        }
 
        TextView txtListChild = (TextView) convertView
                .findViewById(R.id.lblListItem);
 
        txtListChild.setText(childText);
        return convertView;
    }
 
    @Override
    public int getChildrenCount(int groupPosition) {
        return this._listDataChild.get(this._listDataHeader.get(groupPosition))
                .size();
    }
 
    @Override
    public Object getGroup(int groupPosition) {
        return this._listDataHeader.get(groupPosition);
    }
 
    @Override
    public int getGroupCount() {
        return this._listDataHeader.size();
    }
 
    @Override
    public long getGroupId(int groupPosition) {
        return groupPosition;
    }
 
    @Override
    public View getGroupView(int groupPosition, boolean isExpanded,
            View convertView, ViewGroup parent) {
        String headerTitle = (String) getGroup(groupPosition);
        if (convertView == null) {
            LayoutInflater infalInflater = (LayoutInflater) this._context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = infalInflater.inflate(R.layout.list_group, null);
        }
 
        TextView lblListHeader = (TextView) convertView
                .findViewById(R.id.lblListHeader);
        lblListHeader.setTypeface(null, Typeface.BOLD);
        lblListHeader.setText(headerTitle);
 
        return convertView;
    }
 
    @Override
    public boolean hasStableIds() {
        return false;
    }
 
    @Override
    public boolean isChildSelectable(int groupPosition, int childPosition) {
        return true;
    }
}

6. Setelah membuat adapter custom dari Revi Tamada tersebut, selanjutnya kita akan mengedit file MainActivity.java . Ketikkan seperti kode berikut ini :

package com.example.expandablelist;

import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.ExpandableListView;
import android.widget.ExpandableListView.OnChildClickListener;
import android.widget.ExpandableListView.OnGroupClickListener;
import android.widget.ExpandableListView.OnGroupCollapseListener;
import android.widget.ExpandableListView.OnGroupExpandListener;
import android.widget.Toast;
 
public class MainActivity extends Activity {
 
    ExpandableListAdapter listAdapter;
    ExpandableListView expListView;
    List<String> listDataHeader;
    HashMap<String, List<String>> listDataChild;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        // get the listview
        expListView = (ExpandableListView) findViewById(R.id.lvExp);
 
        // preparing list data
        prepareListData();
 
        listAdapter = new ExpandableListAdapter(this, listDataHeader, listDataChild);
 
        // setting list adapter
        expListView.setAdapter(listAdapter);
 
        // Listview Group click listener
        expListView.setOnGroupClickListener(new OnGroupClickListener() {
 
            @Override
            public boolean onGroupClick(ExpandableListView parent, View v,
                    int groupPosition, long id) {
                // Toast.makeText(getApplicationContext(),
                // "Group Clicked " + listDataHeader.get(groupPosition),
                // Toast.LENGTH_SHORT).show();
                return false;
            }
        });
 
        // Listview Group expanded listener
        expListView.setOnGroupExpandListener(new OnGroupExpandListener() {
 
            @Override
            public void onGroupExpand(int groupPosition) {
                Toast.makeText(getApplicationContext(),
                       "Hari " + listDataHeader.get(groupPosition) + " dibuka",
                        Toast.LENGTH_SHORT).show();
            }
        });
 
        // Listview Group collasped listener
        expListView.setOnGroupCollapseListener(new OnGroupCollapseListener() {
 
            @Override
            public void onGroupCollapse(int groupPosition) {
                Toast.makeText(getApplicationContext(),
                        listDataHeader.get(groupPosition) + " Collapsed",
                        Toast.LENGTH_SHORT).show();
 
            }
        });
 
        // Listview on child click listener
        expListView.setOnChildClickListener(new OnChildClickListener() {
 
            @Override
            public boolean onChildClick(ExpandableListView parent, View v,
                    int groupPosition, int childPosition, long id) {
                
             // TODO Auto-generated method stub
                Toast.makeText(
                        getApplicationContext(),
                        listDataHeader.get(groupPosition)
                                + " : "
                                + listDataChild.get(
                                        listDataHeader.get(groupPosition)).get(
                                        childPosition), Toast.LENGTH_SHORT)
                        .show();
                return false;
            }
        });
    }
 
    /*
     * Preparing the list data
     */
    private void prepareListData() {
        listDataHeader = new ArrayList<String>();
        listDataChild = new HashMap<String, List<String>>();
 
        // Adding child data
        listDataHeader.add("Senin  D.313");
        listDataHeader.add("Rabu   G.112 & G.129");
        listDataHeader.add("Kamis  E.349");
        listDataHeader.add("Jum'at G.127");
 
        // Adding child data
        List<String> senin = new ArrayList<String>();
        senin.add("Manajemen & SIM 2 : 7.30-9.30");
        senin.add("Math Lanjut 2     : 11.30-13.30");
        senin.add("Akuntansi 2       : 13.30-15.30");
        
 
        List<String> rabu = new ArrayList<String>();
        rabu.add("Teori Org. Umum 2 #    :  9.30-11.30");
        rabu.add("Math Sist. Informasi 2 : 12.30-14.30");
        rabu.add("Tek. Pemrog. Terstruktur 2 ** : 14.30-16.30");
     
 
        List<String> kamis = new ArrayList<String>();
        kamis.add("Struktur & Org. Data 2 * : 10.30-13.30");
        kamis.add("Pendidikan Agama Islam   : 13.30-15.30");
        
        List<String> jumat = new ArrayList<String>();
        jumat.add("Statistika 2 : 13.30-15.30");
        jumat.add("Sistem Operasi ** : 15.30-17.30");
        
 
        listDataChild.put(listDataHeader.get(0), senin); // Header, Child data
        listDataChild.put(listDataHeader.get(1), rabu);
        listDataChild.put(listDataHeader.get(2), kamis);
        listDataChild.put(listDataHeader.get(3), jumat);
    }
}

gotcha! semua kode sudah ditulis, sekarang saatnya kita intip hasilnya