Sunday 28th of April 12:06:04am
Sunday 28th of April 12:06:04am
MainActivity.java
====================
package com.sam.web.sharedpreference;
import android.content.Context;
import android.content.SharedPreferences;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity implements View.OnClickListener
{
private TextView scoreTextView;
private Button increaseButton, decreaseButton;
private int score=0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
scoreTextView=(TextView) findViewById(R.id.TextViewId);
increaseButton=(Button) findViewById(R.id.increaseScore);
decreaseButton=(Button) findViewById(R.id.dcreaseScore);
increaseButton.setOnClickListener(this);
decreaseButton.setOnClickListener(this);
if(loadScore()!=0){
scoreTextView.setText("Score : "+loadScore());
}
}
@Override
public void onClick(View view) {
if (view.getId()==R.id.increaseScore){
score=score+10;
scoreTextView.setText("Score : "+score);
saveScore(score);
}
else if (view.getId()==R.id.dcreaseScore){
score=score-10;
scoreTextView.setText("Score : "+score);
saveScore(score);
}
}private void saveScore(int score){
SharedPreferences sharedPreferences=getSharedPreferences("gameScore",Context.MODE_PRIVATE);
SharedPreferences.Editor editor=sharedPreferences.edit();
editor.putInt("lastScore",score);
editor.commit();
}
private int loadScore(){
SharedPreferences sharedPreferences=getSharedPreferences("gameScore",Context.MODE_PRIVATE);
int score=sharedPreferences.getInt("lastScore",0);
return score;
}
}
==========================================================================================================
activity_main.xml
==================
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="com.sam.web.sharedpreference.MainActivity">
<TextView
android:layout_marginTop="10dp"
android:text="Score : 0"
android:textAlignment="center"
android:textStyle="bold"
android:textSize="20sp"
android:id="@+id/TextViewId"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<Button
android:layout_marginBottom="10dp"
android:textStyle="bold"
android:textSize="17sp"
android:text="Increase score"
android:id="@+id/increaseScore"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<Button
android:textStyle="bold"
android:textSize="17sp"
android:text="Decrease score"
android:id="@+id/dcreaseScore"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
====================================================================================
styles.xml
=============
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
</style>
</resources>
