Save value to preference : SharedPreferences « Core Class « Android

1. Android
2. Core Class
3. SharedPreferences

Save value to preference

     

package app.test;

import android.app.Activity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.Toast;

public class Test extends Activity {
    private SharedPreferences prefs;
    private EditText editText;
    private SeekBar seekBar;
    private Button btn;
    private String FONT_SIZE_KEY = "fontsize";
    private String TEXT_VALUE_KEY = "textvalue";
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
                
        editText = (EditText) findViewById(R.id.EditText01);
        seekBar = (SeekBar) findViewById(R.id.SeekBar01);
        btn = (Button) findViewById(R.id.btnSave);
        
        btn.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
              //---get the SharedPreferences object---
              //prefs = getSharedPreferences(prefName, MODE_PRIVATE);
              prefs = getPreferences(MODE_PRIVATE);
              
                SharedPreferences.Editor editor = prefs.edit();
                //---save the values in the EditText view to preferences---                
                editor.putFloat(FONT_SIZE_KEY, editText.getTextSize());  
                editor.putString(TEXT_VALUE_KEY, editText.getText().toString());
                
                editor.commit();       
                Toast.makeText(getBaseContext(), 
                    "Font size saved successfully!", 
                    Toast.LENGTH_SHORT).show();
            }
        });        
        
        //---load the SharedPreferences object---
        //SharedPreferences prefs = getSharedPreferences(prefName, MODE_PRIVATE);
        prefs = getPreferences(MODE_PRIVATE);
        
        float fontSize = prefs.getFloat(FONT_SIZE_KEY, 12);
        
        seekBar.setProgress((int) fontSize);
        editText.setText(prefs.getString(TEXT_VALUE_KEY, ""));
        editText.setTextSize(seekBar.getProgress());
        
        seekBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {      
      @Override
      public void onStopTrackingTouch(SeekBar seekBar) {                
      }
      
      @Override
      public void onStartTrackingTouch(SeekBar seekBar) {        
      }
      
      @Override
      public void onProgressChanged(SeekBar seekBar, int progress,
          boolean fromUser) {
        editText.setTextSize(progress);
      }
    }); 
    }
}
//main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    
<SeekBar 
    android:id="@+id/SeekBar01" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" />
    
<TextView  
    android:id="@+id/TextView01"    
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello" />
        
<EditText 
    android:id="@+id/EditText01" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" />
    
<Button 
    android:id="@+id/btnSave" 
    android:text="Save"
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" />    

</LinearLayout>

   
    
    
    
    
  

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