Notes

package com.example.kariyermimari.myapplication2;

import android.content.Intent;
import android.graphics.Bitmap;
import android.os.AsyncTask;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;

import org.json.JSONArray;
import org.json.JSONException;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;

public class MainActivity extends AppCompatActivity {


public static String API_TC = "ilkprojem-152211";
public static String API_KEY = "AIzaSyD2dPEQ5D69qvocPWc7VjTHeg26mb4kJY";

Button button;
EditText ulke;

TextView a1,a2,a3,a4;

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


ulke = (EditText)findViewById(R.id.ulke);

final String secilenUlke = ulke.getText().toString();

button = (Button)findViewById(R.id.btn2);

button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {

jsonParse js = new jsonParse(secilenUlke);
js.execute();

}
});

a1 = (TextView)findViewById(R.id.country);
a2 = (TextView)findViewById(R.id.capital);
a3 = (TextView)findViewById(R.id.lang);
a4 = (TextView)findViewById(R.id.nufus);

}

public class jsonParse extends AsyncTask<Void,Void,Void>{

String country,lang, capital;
int nufus;

String arama;

public jsonParse(String _arama){
arama = _arama;
}
@Override
protected Void doInBackground(Void... voids) {

String result;

try {

URL adres = new URL("https://restcountries.eu/rest/v1/name/"+arama);
BufferedReader bfReader = null;
StringBuilder sb = new StringBuilder();

bfReader = new BufferedReader(
new InputStreamReader(adres.openStream())
);

String line = null;
while((line = bfReader.readLine()) != null){
sb.append(line).append("n");
}

result = sb.toString();
bfReader.close();

JSONArray json = new JSONArray(result);

country = json.getJSONObject(0).getString("name");
capital = json.getJSONObject(0).getString("capital");
lang = json.getJSONObject(0).getString("demonym");
nufus = json.getJSONObject(0).getInt("population");

runOnUiThread(new Runnable() {
@Override
public void run() {
a1.setText("Ülke : "+country);
a2.setText("Başkent : "+capital);
a3.setText("Dil : "+lang);
a4.setText("Nufüs : "+nufus);
}
});

}catch(SecurityException e ){

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

return null;
}

@Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
}
}

}