Applikasi Pemesan Makanan (Android Client-server)

Assalamualaikum Wr. Wb.

Pada Pertemuan Kali Ini saya akan membuat aplikasi Client-Server Pemesan Makanan, Tapi pada blog kali ini saya hanya akan fokus pada Clientnya saja.
Ok, langsung saja ...
a. langkah pertama yang harus kita lakukan adalah membuat project baru pada Aplikasi ADT atau sejenisnya .
dengan cara klik pada menu file -> new -> Android Application Project
kemudian kita beri nama disni nama project saya adalah "tips_crud_android_json_mysql" dengan nama file xml "main" .

main.xml

- kemudian kita membuat file java persis seperti pada gambar di bawah ini:

- script unutk Biodata.java:

package jhohannes.purba;

public class Biodata extends Koneksi {
String URL = "http://10.0.2.2/tips_crud_android_json_mysql/server.php";
String url = "";
String response = "";

public String tampilBiodata() {
try {
url = URL + "?operasi=view";
System.out.println("URL Tampil Biodata: " + url);
response = call(url);
} catch (Exception e) {
}
return response;
}

public String inserBiodata(String nama, String alamat) {
try {
url = URL + "?operasi=insert&nama=" + nama + "&alamat=" + alamat;
System.out.println("URL Insert Biodata : " + url);
response = call(url);
} catch (Exception e) {
}
return response;
}

public String getBiodataById(int id) {
try {
url = URL + "?operasi=get_biodata_by_id&id=" + id;
System.out.println("URL Insert Biodata : " + url);
response = call(url);
} catch (Exception e) {
}
return response;
}

public String updateBiodata(String id, String nama, String alamat) {
try {
url = URL + "?operasi=update&id=" + id + "&nama=" + nama + "&alamat=" + alamat;
System.out.println("URL Insert Biodata : " + url);
response = call(url);
} catch (Exception e) {
}
return response;
}

public String deleteBiodata(int id) {
try {
url = URL + "?operasi=delete&id=" + id;
System.out.println("URL Insert Biodata : " + url);
response = call(url);
} catch (Exception e) {
}
return response;
}

}

- script untuk koneksi.java

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.net.HttpURLConnection;

import java.net.URL;

import java.net.URLConnection;

public class Koneksi {

public String call(String url) {

int BUFFER_SIZE = 2000;

InputStream in = null;

try {

in = OpenHttpConnection(url);

} catch (IOException e) {

e.printStackTrace();

return "";

}

InputStreamReader isr = new InputStreamReader(in);

int charRead;

String str = "";

char[] inputBuffer = new char[BUFFER_SIZE];

try {

while ((charRead = isr.read(inputBuffer)) > 0) {

String readString = String.copyValueOf(inputBuffer, 0, charRead);

str += readString;

inputBuffer = new char[BUFFER_SIZE];

}

in.close();

} catch (IOException e) {

// Handle Exception

e.printStackTrace();

return "";

}

return str;

}

private InputStream OpenHttpConnection(String url) throws IOException {

InputStream in = null;

int response = -1;

URL url1 = new URL(url);

URLConnection conn = url1.openConnection();

if (!(conn instanceof HttpURLConnection))

throw new IOException("Not An Http Connection");

try {

HttpURLConnection httpconn = (HttpURLConnection) conn;

httpconn.setAllowUserInteraction(false);

httpconn.setInstanceFollowRedirects(true);

httpconn.setRequestMethod("GET");

httpconn.connect();

response = httpconn.getResponseCode();

if (response == HttpURLConnection.HTTP_OK) {

in = httpconn.getInputStream();

}

} catch (Exception e) {

throw new IOException("Error connecting2");

}

return in;

}

}

- script untuk MainActivity.java:

import java.util.ArrayList;

import org.json.JSONArray;

import org.json.JSONException;

import org.json.JSONObject;

import android.app.Activity;

import android.app.AlertDialog;

import android.content.DialogInterface;

import android.graphics.Color;

import android.os.Bundle;

import android.support.v4.view.ViewPager.LayoutParams;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.LinearLayout;

import android.widget.TableLayout;

import android.widget.TableRow;

import android.widget.TextView;

import android.widget.Toast;

public class MainActivity extends Activity implements OnClickListener {

Biodata biodata = new Biodata();

TableLayout tabelBiodata;

Button buttonTambahBiodata;

ArrayList<Button> buttonEdit = new ArrayList<Button>();

ArrayList<Button> buttonDelete = new ArrayList<Button>();

JSONArray arrayBiodata;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

tabelBiodata = (TableLayout) findViewById(R.id.tableBiodata);

buttonTambahBiodata = (Button) findViewById(R.id.buttonTambahBiodata);

buttonTambahBiodata.setOnClickListener(this);

TableRow barisTabel = new TableRow(this);

barisTabel.setBackgroundColor(Color.CYAN);

TextView viewHeaderId = new TextView(this);

TextView viewHeaderNama = new TextView(this);

TextView viewHeaderAlamat = new TextView(this);

TextView viewHeaderAction = new TextView(this);

viewHeaderId.setText("ID");

viewHeaderNama.setText("Nama");

viewHeaderAlamat.setText("Alamat");

viewHeaderAction.setText("Action");

viewHeaderId.setPadding(5, 1, 5, 1);

viewHeaderNama.setPadding(5, 1, 5, 1);

viewHeaderAlamat.setPadding(5, 1, 5, 1);

viewHeaderAction.setPadding(5, 1, 5, 1);

barisTabel.addView(viewHeaderId);

barisTabel.addView(viewHeaderNama);

barisTabel.addView(viewHeaderAlamat);

barisTabel.addView(viewHeaderAction);

tabelBiodata.addView(barisTabel, new TableLayout.LayoutParams(LayoutParams.WRAP_CONTENT,

LayoutParams.WRAP_CONTENT));

try {

arrayBiodata = new JSONArray(biodata.tampilBiodata());

for (int i = 0; i < arrayBiodata.length(); i++) {

JSONObject jsonChildNode = arrayBiodata.getJSONObject(i);

String name = jsonChildNode.optString("nama");

String alamat = jsonChildNode.optString("Alamat");

String id = jsonChildNode.optString("id");

System.out.println("Nama :" + name);

System.out.println("Alamat :" + alamat);

System.out.println("ID :" + id);

barisTabel = new TableRow(this);

if (i % 2 == 0) {

barisTabel.setBackgroundColor(Color.LTGRAY);

}

TextView viewId = new TextView(this);

viewId.setText(id);

viewId.setPadding(5, 1, 5, 1);

barisTabel.addView(viewId);

TextView viewNama = new TextView(this);

viewNama.setText(name);

viewNama.setPadding(5, 1, 5, 1);

barisTabel.addView(viewNama);

TextView viewAlamat = new TextView(this);

viewAlamat.setText(alamat);

viewAlamat.setPadding(5, 1, 5, 1);

barisTabel.addView(viewAlamat);

buttonEdit.add(i, new Button(this));

buttonEdit.get(i).setId(Integer.parseInt(id));

buttonEdit.get(i).setTag("Edit");

buttonEdit.get(i).setText("Edit");

buttonEdit.get(i).setOnClickListener(this);

barisTabel.addView(buttonEdit.get(i));

buttonDelete.add(i, new Button(this));

buttonDelete.get(i).setId(Integer.parseInt(id));

buttonDelete.get(i).setTag("Delete");

buttonDelete.get(i).setText("Delete");

buttonDelete.get(i).setOnClickListener(this);

barisTabel.addView(buttonDelete.get(i));

tabelBiodata.addView(barisTabel, new TableLayout.LayoutParams(LayoutParams.MATCH_PARENT,

LayoutParams.MATCH_PARENT));

}

} catch (JSONException e) {

e.printStackTrace();

}

}

public void onClick(View view) {

if (view.getId() == R.id.buttonTambahBiodata) {

// Toast.makeText(MainActivity.this, "Button Tambah Data",

// Toast.LENGTH_SHORT).show();

tambahBiodata();

} else {

/*

* Melakukan pengecekan pada data array, agar sesuai dengan index

* masing-masing button

*/

for (int i = 0; i < buttonEdit.size(); i++) {

/* jika yang diklik adalah button edit */

if (view.getId() == buttonEdit.get(i).getId() && view.getTag().toString().trim().equals("Edit")) {

// Toast.makeText(MainActivity.this, "Edit : " +

// buttonEdit.get(i).getId(), Toast.LENGTH_SHORT).show();

int id = buttonEdit.get(i).getId();

getDataByID(id);

} /* jika yang diklik adalah button delete */

else if (view.getId() == buttonDelete.get(i).getId() && view.getTag().toString().trim().equals("Delete")) {

// Toast.makeText(MainActivity.this, "Delete : " +

// buttonDelete.get(i).getId(), Toast.LENGTH_SHORT).show();

int id = buttonDelete.get(i).getId();

deleteBiodata(id);

}

}

}

}

public void deleteBiodata(int id) {

biodata.deleteBiodata(id);

/* restart acrtivity */

finish();

startActivity(getIntent());

}

public void getDataByID(int id) {

String namaEdit = null, alamatEdit = null;

JSONArray arrayPersonal;

try {

arrayPersonal = new JSONArray(biodata.getBiodataById(id));

for (int i = 0; i < arrayPersonal.length(); i++) {

JSONObject jsonChildNode = arrayPersonal.getJSONObject(i);

namaEdit = jsonChildNode.optString("nama");

alamatEdit = jsonChildNode.optString("Alamat");

}

} catch (JSONException e) {

e.printStackTrace();

}

LinearLayout layoutInput = new LinearLayout(this);

layoutInput.setOrientation(LinearLayout.VERTICAL);

// buat id tersembunyi di alertbuilder

final TextView viewId = new TextView(this);

viewId.setText(String.valueOf(id));

viewId.setTextColor(Color.TRANSPARENT);

layoutInput.addView(viewId);

final EditText editNama = new EditText(this);

editNama.setText(namaEdit);

layoutInput.addView(editNama);

final EditText editAlamat = new EditText(this);

editAlamat.setText(alamatEdit);

layoutInput.addView(editAlamat);

AlertDialog.Builder builderEditBiodata = new AlertDialog.Builder(this);

builderEditBiodata.setIcon(R.drawable.batagrams);

builderEditBiodata.setTitle("Update Biodata");

builderEditBiodata.setView(layoutInput);

builderEditBiodata.setPositiveButton("Update", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

String nama = editNama.getText().toString();

String alamat = editAlamat.getText().toString();

System.out.println("Nama : " + nama + " Alamat : " + alamat);

String laporan = biodata.updateBiodata(viewId.getText().toString(), editNama.getText().toString(),

editAlamat.getText().toString());

Toast.makeText(MainActivity.this, laporan, Toast.LENGTH_SHORT).show();

/* restart acrtivity */

finish();

startActivity(getIntent());

}

});

builderEditBiodata.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

dialog.cancel();

}

});

builderEditBiodata.show();

}

public void tambahBiodata() {

/* layout akan ditampilkan pada AlertDialog */

LinearLayout layoutInput = new LinearLayout(this);

layoutInput.setOrientation(LinearLayout.VERTICAL);

final EditText editNama = new EditText(this);

editNama.setHint("Nama");

layoutInput.addView(editNama);

final EditText editAlamat = new EditText(this);

editAlamat.setHint("Alamat");

layoutInput.addView(editAlamat);

AlertDialog.Builder builderInsertBiodata = new AlertDialog.Builder(this);

builderInsertBiodata.setIcon(R.drawable.batagrams);

builderInsertBiodata.setTitle("Insert Biodata");

builderInsertBiodata.setView(layoutInput);

builderInsertBiodata.setPositiveButton("Insert", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

String nama = editNama.getText().toString();

String alamat = editAlamat.getText().toString();

System.out.println("Nama : " + nama + " Alamat : " + alamat);

String laporan = biodata.inserBiodata(nama, alamat);

Toast.makeText(MainActivity.this, laporan, Toast.LENGTH_SHORT).show();

/* restart acrtivity */

finish();

startActivity(getIntent());

}

});

builderInsertBiodata.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

dialog.cancel();

}

});

builderInsertBiodata.show();

}

}

Hasil running :