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<?xml version="1.0" encoding="utf-8"?>
<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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="fr.koor.megagame.MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="@string/lblTitle"
        android:id="@+id/textView"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true" />

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:inputType="number"
        android:ems="10"
        android:id="@+id/txtNumber"
        android:layout_below="@+id/textView"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_toLeftOf="@+id/btnCompare"
        android:layout_toStartOf="@+id/btnCompare" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/btnCompare"
        android:id="@+id/btnCompare"
        android:layout_below="@+id/textView"
        android:layout_alignRight="@+id/textView"
        android:layout_alignEnd="@+id/textView" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:id="@+id/lblResult"
        android:layout_below="@+id/btnCompare"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_alignRight="@+id/btnCompare"
        android:layout_alignEnd="@+id/btnCompare" />

    <ProgressBar
        style="?android:attr/progressBarStyleHorizontal"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/pgbScore"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_below="@+id/lblResult"
        android:layout_alignRight="@+id/lblResult"
        android:layout_alignEnd="@+id/lblResult"
        android:indeterminate="false"
        android:max="10"
        android:progress="8" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:id="@+id/lblHistory"
        android:layout_below="@+id/pgbScore"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentBottom="true"
        android:layout_alignRight="@+id/pgbScore"
        android:layout_alignEnd="@+id/pgbScore" />

</RelativeLayout>

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<resources>

    <string name="app_name">MegaGame V 1.0</string>

    <string name="lblTitle">Enter a value between 1 and 100:</string>
    <string name="btnCompare">Compare</string>

    <string name="strGreater">Please enter a greater value.</string>
    <string name="strLower">Please enter a lower value.</string>
    <string name="strCongratulations">Congratulations</string>

    <string name="strMessage">Congratulations, You win in %d times. Do you want retry?</string>
    <string name="strYes">Yes</string>
    <string name="strNo">No</string>

</resources>

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package fr.koor.megagame;

import android.content.DialogInterface;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.TextView;

import java.text.DateFormat;
import java.text.NumberFormat;
import java.util.Date;

public class MainActivity extends AppCompatActivity {

    private EditText txtNumber;
    private Button btnCompare;
    private TextView lblResult;
    private ProgressBar pgbScore;
    private TextView lblHistory;

    private int searchedValue;
    private int score;

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

        txtNumber = (EditText) findViewById( R.id.txtNumber );
        btnCompare = (Button) findViewById( R.id.btnCompare );
        lblResult = (TextView) findViewById( R.id.lblResult );
        pgbScore = (ProgressBar) findViewById( R.id.pgbScore );
        lblHistory = (TextView) findViewById( R.id.lblHistory );

        btnCompare.setOnClickListener( btnCompareListener );

        init();

        NumberFormat formatter = NumberFormat.getCurrencyInstance();
        double price = 1_000_000.01;
        Log.i( "DEBUG", formatter.format( price ) );

        DateFormat dataFormatter = DateFormat.getDateTimeInstance();
        Log.i( "DEBUG", dataFormatter.format( new Date() ) );
    }

    private void init() {
        score = 0;
        searchedValue = 1 + (int) (Math.random() * 100);
        Log.i( "DEBUG", "Searched value : " + searchedValue );

        txtNumber.setText( "" );
        pgbScore.setProgress( score );
        lblResult.setText( "" );
        lblHistory.setText( "" );

        txtNumber.requestFocus();
    }

    private void congratulations() {
        lblResult.setText( R.string.strCongratulations );

        AlertDialog retryAlert = new AlertDialog.Builder( this ).create();
        retryAlert.setTitle( R.string.app_name );
        retryAlert.setMessage( getString(R.string.strMessage, score ) );

        retryAlert.setButton( AlertDialog.BUTTON_POSITIVE, getString(R.string.strYes), new AlertDialog.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                init();
            }
        });

        retryAlert.setButton( AlertDialog.BUTTON_NEGATIVE, getString(R.string.strNo), new AlertDialog.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                finish();
            }
        });

        retryAlert.show();
    }

    private View.OnClickListener btnCompareListener = new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Log.i( "DEBUG", "Button clicked" );

            String strNumber = txtNumber.getText().toString();
            if ( strNumber.equals( "" ) ) return;

            int enteredValue = Integer.parseInt( strNumber );
            lblHistory.append( strNumber + "\r\n" );
            pgbScore.incrementProgressBy( 1 );
            score++;

            if ( enteredValue == searchedValue ) {
                congratulations();
            } else if ( enteredValue < searchedValue ) {
                lblResult.setText( R.string.strGreater );
            } else {
                lblResult.setText( R.string.strLower );
            }

            txtNumber.setText( "" );
            txtNumber.requestFocus();

        }
    };

}