Merhabalar
Bu makalede internetten güncel olarak döviz kurlarini takip eden bir uygulama gelistirecegiz.
Bilgilerimizi http://www.doviz.gen.tr sitesinden web servis ile alacagiz. Verilerimizi JSON olarak siteden çagirip JSON objesi olarak parse edecegiz. Daha sonra aldigimiz verileri ekrana yansitacagiz. Aldigimniz bu verilerle Tl-Dolar, TL-Euro çevirme uygulamasi gelistirecegiz.
Uygulamanin kaynak koduna buradan ulasabilirsiniz.
Öncelikle layoutumuzu ayarliyoruz.
doviz_kuru.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#FFFFFF"
android:clickable="false"
android:longClickable="false"
tools:context=".DovizKuru" >
<TextView
android:id="@+id/textViewTime"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="82dp"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textSize="15sp" />
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/textView4"
android:layout_toRightOf="@+id/textViewZaman"
android:text="Dolar"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/textView1"
android:layout_marginTop="32dp"
android:layout_toRightOf="@+id/textViewZaman"
android:text="Euro"
android:textAppearance="?android:attr/textAppearanceMedium" />
<RelativeLayout
android:id="@+id/relativeLayout2"
android:layout_width="wrap_content"
android:layout_height="80dp"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_below="@+id/buttonGnc" >
<TextView
android:id="@+id/textViewTime1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView"
android:textSize="10sp"/>
</RelativeLayout>
<EditText
android:id="@+id/editTextEuro1"
android:layout_width="90dp"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/textView2"
android:layout_alignBottom="@+id/textView2"
android:layout_marginLeft="20dp"
android:layout_toRightOf="@+id/textView1"
android:clickable="false"
android:ems="10"
android:enabled="false"
android:focusable="false"
android:focusableInTouchMode="false"
android:linksClickable="false"
android:longClickable="false" />
<EditText
android:id="@+id/editTextDolar1"
android:layout_width="90dp"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/textView1"
android:layout_alignBottom="@+id/textView1"
android:layout_alignLeft="@+id/editTextEuro1"
android:clickable="false"
android:ems="10"
android:focusable="false"
android:focusableInTouchMode="false"
android:longClickable="false" >
<requestFocus />
</EditText>
<TextView
android:id="@+id/textView3"
android:layout_width="90dp"
android:layout_height="40dp"
android:layout_above="@+id/textView1"
android:layout_alignLeft="@+id/editTextDolar1"
android:text="Alis"
android:textSize="20sp" />
<TextView
android:id="@+id/textView4"
android:layout_width="90dp"
android:layout_height="40dp"
android:layout_below="@+id/textViewZaman"
android:layout_marginLeft="17dp"
android:layout_toRightOf="@+id/editTextDolar1"
android:text="Satis"
android:textSize="20sp" />
<EditText
android:id="@+id/editTextEuro2"
android:layout_width="90dp"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/editTextEuro1"
android:layout_alignBottom="@+id/editTextEuro1"
android:layout_alignLeft="@+id/textView4"
android:clickable="false"
android:ems="10"
android:focusable="false"
android:focusableInTouchMode="false"
android:longClickable="false" />
<Button
android:id="@+id/buttonUpt"
android:layout_width="230dp"
android:layout_height="20dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:background="@drawable/whitebutton"
android:text="Güncelle" />
<EditText
android:id="@+id/editTextDolar2"
android:layout_width="90dp"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/editTextDolar1"
android:layout_alignBottom="@+id/editTextDolar1"
android:layout_alignLeft="@+id/textView4"
android:clickable="false"
android:ems="10"
android:focusable="false"
android:focusableInTouchMode="false"
android:longClickable="false" />
<EditText
android:id="@+id/editText1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/textView5"
android:layout_alignBottom="@+id/textView5"
android:layout_alignParentRight="true"
android:ems="10"
android:inputType="number" />
<TextView
android:id="@+id/textView5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/editTextEuro1"
android:layout_marginTop="71dp"
android:text="TL :"
android:textAppearance="?android:attr/textAppearanceLarge" />
<EditText
android:id="@+id/editText2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignTop="@+id/textView6"
android:ems="10"
android:inputType="number" />
<EditText
android:id="@+id/editText3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_below="@+id/editText2"
android:ems="10"
android:inputType="number" />
<TextView
android:id="@+id/textView7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/editText3"
android:layout_alignBottom="@+id/editText3"
android:layout_alignRight="@+id/textView6"
android:text="Euro :"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/textView6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/editText1"
android:layout_marginTop="14dp"
android:text="Dolar:"
android:textAppearance="?android:attr/textAppearanceLarge" />
<Button
android:id="@+id/buttonConvert"
android:layout_width="100dp"
android:layout_height="30dp"
android:layout_alignLeft="@+id/buttonGnc"
android:layout_alignParentBottom="true"
android:background="@drawable/whitebutton"
android:text="Çevir" />
<Button
android:id="@+id/buttonExit"
android:layout_width="100dp"
android:layout_height="30dp"
android:layout_alignLeft="@+id/editTextEuro2"
android:layout_alignParentBottom="true"
android:background="@drawable/whitebutton"
android:text="Çikis" />
</RelativeLayout>
Kodlarimizi yazmadan once layoutta kullanmis oldugum "whitebutton"tasarimini olusturmaliyiz. Bunun için projemizde "res/drawable" klasörünün içine "whitebutton.xml " olarak yeni bir xml dosyasi açiyoruz.
whitebutton.xml
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true" >
<shape
android:shape="rectangle" android:padding="10dp">
<solid android:color="#ffa500"/>
<corners
android:bottomRightRadius="10dp"
android:bottomLeftRadius="10dp"
android:topLeftRadius="10dp"
android:topRightRadius="10dp"
android:color="#ABABAB"/>
<stroke
android:width="2dp"
android:color="#FF000000"/>
</shape>
</item>
<item>
<shape
android:shape="rectangle" android:padding="10dp">
<!-- you can use any color you want I used here gray color-->
<solid android:color="#ffffff"/>
<corners
android:bottomRightRadius="10dp"
android:bottomLeftRadius="10dp"
android:topLeftRadius="10dp"
android:topRightRadius="10dp"
android:color="#ABABAB"/>
<stroke
android:width="2dp"
android:color="#FF000000"/>
</shape>
</item>
</selector>
Simdi gerekli olan kodlarimizi yazacagiz
DovizKuru.java
package com.example.dovizkuru;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONObject;
import android.app.Activity;
import android.os.Bundle;
import android.text.Editable;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class DovizKuru extends Activity {
public static final String URL = "http://www.doviz.gen.tr/doviz_json.asp?version=1.0.4";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//
setContentView(R.layout.doviz_kuru);
// Gerekli olan widgetlarimizi tanittik
final EditText tlcon=(EditText)findViewById(R.id.editText1);
final EditText dolarcon=(EditText)findViewById(R.id.editText2);
final EditText eurocon=(EditText)findViewById(R.id.editText3);
//program baslatildiginda verilerin güncellenmesi için kullandik
UpdateData();
//Güncelle butonunun dinleyicisi
Button btnupt=(Button)findViewById(R.id.buttonGnc);
btnupt.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
UpdateData();
}
});
final EditText dolar_1=(EditText)findViewById(R.id.editTextDolar1);
final EditText dolar_2=(EditText)findViewById(R.id.editTextDolar2);
final EditText euro_1=(EditText)findViewById(R.id.editTextEuro1);
final EditText euro_2=(EditText)findViewById(R.id.editTextEuro2);
TextView UptadeTime = (TextView) findViewById(R.id.textViewTime1);
//NumberFormatException hatasi almamak için birim çeviri kismindaki EditText degerlerini "0" atiyoruz
tlcon.setText("0");
dolarcon.setText("0");
eurocon.setText("0");
final float tlcon1=Float.parseFloat(tlcon.getText().toString());
final float dolarcon1=Float.parseFloat(dolarcon.getText().toString());
final float eurocon1=Float.parseFloat(eurocon.getText().toString());
//çeviri tusunun dinleyicisi
Button btnconvert =(Button)findViewById(R.id.buttonConvert);
btnconvert.setOnClickListener(new View.OnClickListener() {
@Override
//Birimleri birbirine çevirmek için kullanilan kodlar
public void onClick(View v) {
float tlcon1=Float.parseFloat(tlcon.getText().toString());
float dolarcon1=Float.parseFloat(dolarcon.getText().toString());
float eurocon1=Float.parseFloat(eurocon.getText().toString());
if(tlcon1!=0&&dolarcon1==0&&eurocon1==0){
dolarcon1=tlcon1/Float.parseFloat(dolar_1.getText().toString());
eurocon1=tlcon1/Float.parseFloat(euro_1.getText().toString());
dolarcon.setText(Float.toString(dolarcon1));
eurocon.setText(Float.toString(eurocon1));
}
else if(dolarcon1!=0&&tlcon1==0&&eurocon1==0){tlcon1=dolarcon1*Float.parseFloat(dolar_2.getText().toString());
eurocon1=dolarcon1*Float.parseFloat(dolar_2.getText().toString())/Float.parseFloat(euro_1.getText().toString());
tlcon.setText(Float.toString(tlcon1));
eurocon.setText(Float.toString(eurocon1));}
//Eger birden fazla birim girildiyse yanlis deger almamak icin EditTextleri sifirliyoruz
else if(eurocon1!=0&&tlcon1==0&&dolarcon1==0){tlcon1=eurocon1*Float.parseFloat(euro_2.getText().toString());
dolarcon1=eurocon1*Float.parseFloat(euro_2.getText().toString())/Float.parseFloat(dolar_1.getText().toString());
tlcon.setText(Float.toString(tlcon1));
eurocon.setText(Float.toString(eurocon1));}else{
tlcon.setText("0");
dolarcon.setText("0");
eurocon.setText("0");}
}
});
//Çikis tusunun dinleyicisi
Button btnexit=(Button)findViewById(R.id.buttonExit);
btnexit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
DovizKuru.this.finish();
}
});
}
public void UpdateData(){
//loyout uzerindeki bilesenleri tanimlayacagiz
EditText dolar_1=(EditText)findViewById(R.id.editTextDolar1);
EditText dolar_2=(EditText)findViewById(R.id.editTextDolar2);
EditText euro_1=(EditText)findViewById(R.id.editTextEuro1);
EditText euro_2=(EditText)findViewById(R.id.editTextEuro2);
TextView UptadeTime = (TextView) findViewById(R.id.textViewTime1);
String dolar ;
String euro ;
String dolar2 ;
String euro2 ;
String LastUptadeTime;
String LastRegisterDate ;
//burada bir web istegi olusturuyoruz
HttpClient client =new DefaultHttpClient();
HttpGet getData =new HttpGet(URL);
HttpResponse response;
try{
response=client.execute(getData);
HttpEntity entity=response.getEntity();
if(entity != null){
InputStream Data=entity.getContent();
String result =convertStreamToString(Data);
//Siteden gelen veriyi JSON Objemize atiyoruz
JSONObject jsonVeri=new JSONObject(result);
dolar = jsonVeri.getString("dolar2");
euro = jsonVeri.getString("euro2");
dolar2 = jsonVeri.getString("dolar");
euro2 = jsonVeri.getString("euro");
LastUptadeTime = jsonVeri.getString("guncelleme");
LastRegisterDate = jsonVeri.getString("sonkayit");
//Verilerimizi ekrana yazdiriyoruz
dolar_1.setText(dolar.toString());
euro_1.setText(euro.toString());
dolar_2.setText(dolar2.toString());
euro_2.setText(euro2.toString());
UptadeTime.setText(LastUptadeTime.toString()+"/n"+LastRegisterDate.toString());
}
}catch(Exception e){ LastUptadeTime="Güncelleme basarisiz!\nInternet baglantinizi kontrol edip, tekrar deneyiniz!";
}
}
public static String convertStreamToString(InputStream is){
//burada gelen veriyi string degerine çevirecegiz
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null) {
sb.append(line).append("\n");
}
} catch (IOException e) {
} finally {
try {
is.close();
} catch (IOException e) {
}
}
return sb.toString();
}
}
Son olarak uygulamamizin interneti kullanabilmesi için bir adet permission olusturup Internet kullanimina izin vermemiz gerekiyor. AndroidManifest.xml dosyasinda "</application>" 'in altina asagidaki kodu yaziyoruz.
<uses-permission android:name="android.permission.INTERNET"/>
Bunu yaptiktan sonra uygulamamiz kullanima hazirdir.
androidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.dovizkuru"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.dovizkuru.DovizKuru"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-permission android:name="android.permission.INTERNET"/>
</manifest>
Uygulamanin ekran görüntüleri:
Teşekkür bu güzel bilgi için antalya transfer için ihtiyaç olmuştu çok işime yaradı.