app-mobile/app/src/main/java/monnethic/mobile/user/UserAccountActivity.java

package monnethic.mobile.user;

import android.content.Intent;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import com.example.monnthic.monnethicmobile.R;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

import monnethic.mobile.blockchainApi.UrlApi;
import monnethic.mobile.transaction.MakePayementActivity;
import monnethic.mobile.transaction.ReceivePayementActivity;

public class UserAccountActivity extends AppCompatActivity {

    private TextView balance;
    private String strUrl = UrlApi.URL_BALANCE+"b";
    private String result;

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

        balance = findViewById(R.id.balanceView);
        Button buttonPayement = findViewById(R.id.buttonPayement);
        Button buttonReceive = findViewById(R.id.buttonReceive);
        Button buttonSettings = findViewById(R.id.buttonSettings);
        Button buttonRefresh = findViewById(R.id.buttonRefreshBalance);


        buttonPayement.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                sendPayement();
            }
        });
        buttonReceive.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                receivePayement();
            }
        });
        buttonSettings.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                settings();
            }
        });
        buttonRefresh.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                refreshBalance("b");
            }
        });

        new GetUserBalanceTask().execute(strUrl);
    }

    public void sendPayement(){
        Intent payementIntent = new Intent(UserAccountActivity.this, MakePayementActivity.class);
        UserAccountActivity.this.startActivity(payementIntent);
    }
    public void receivePayement(){
        Intent receivePayementIntent = new Intent(UserAccountActivity.this, ReceivePayementActivity.class);
        UserAccountActivity.this.startActivity(receivePayementIntent);
    }
    public void settings(){
        Toast.makeText(this, "Coming soon", Toast.LENGTH_SHORT).show();
    }

    public void refreshBalance(String userHash){
        String url = UrlApi.URL_BALANCE+userHash;
        new GetUserBalanceTask().execute(url);
    }

    public void setBalance(String value){
        balance.setText(value);
    }


    public class GetUserBalanceTask extends AsyncTask<String,String,String>
    {
        @Override
        protected void onPreExecute() {
            super.onPreExecute();
        }

        @Override
        protected void onPostExecute(String s) {
            balance.setText(s);
        }

        @Override
        protected String doInBackground(String... params) {
            System.out.println(params[0]);
            InputStream inputStream = null;
            HttpURLConnection conn = null;
            try{
                URL url = new URL(params[0]);
                conn = (HttpURLConnection) url.openConnection();
                conn.setRequestMethod("GET");
                conn.connect();

                int response = conn.getResponseCode();
                if(response != 200){
                    return "Error response";
                }

                inputStream = conn.getInputStream();
                if(inputStream == null){
                    return "Error inputStream";
                }

                BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
                StringBuffer buffer = new StringBuffer();
                String line;

                while ((line = reader.readLine())!=null){
                    buffer.append(line);
                }

                String value = new String(buffer);

                System.out.println("result is "+value);
                result = value;

            } catch (Exception e){
                System.out.println("Exception : "+e);
            }
            return result;
        }
    }
}