Android Open Source - Text-Edit-for-Android Font Size Preference

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License

The source code is released under:

GNU General Public License

Java Source Code

package org.paulmach.textedit;
// w  w  w . java2s. c  o m
import java.util.Arrays;
import java.util.List;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.graphics.Color;
import android.preference.DialogPreference;
import android.preference.PreferenceManager;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;

/* FontTypePreference
 *     Special file type preference so that each option is actually 
 *     an example of the font. */
public class FontSizePreference extends DialogPreference
{
  private List<String> fonts = null;
  private int selected;
  
  // This is the constructor called by the inflater
  public FontSizePreference(Context context, AttributeSet attrs) {
    super(context, attrs);
        
    // figure out the current size. 
    SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(getContext());
    String font = sharedPref.getString("fontsize", "Medium");
    
    if (font.equals("Extra Small"))
      selected = 0;
    else if (font.equals("Small"))
      selected = 1;
    else if (font.equals("Medium"))
      selected = 2;
    else if (font.equals("Large"))
      selected = 3;
    else if (font.equals("Huge"))
      selected = 4;
  }
  
  @Override
  protected void onPrepareDialogBuilder(AlertDialog.Builder builder){
      // Data has changed, notify so UI can be refreshed!
    builder.setTitle("Choose a font type");
    builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
      public void onClick(DialogInterface dialog, int whichButton) {
        
        // save the choice in the preferences
        Editor editor = PreferenceManager.getDefaultSharedPreferences(getContext()).edit();    
        
        if (selected == 0)
          editor.putString("fontsize", "Extra Small");
        else if (selected == 1)
          editor.putString("fontsize", "Small");
        else if (selected == 2)
          editor.putString("fontsize", "Medium");
        else if (selected == 3)
          editor.putString("fontsize", "Large");
        else if (selected == 4)
          editor.putString("fontsize", "Huge");
        
        editor.commit();
        
        notifyChanged();
      }
    });
    builder.setNegativeButton("Cancel", null);
  
    // load the font names and create the adapter
    String[] arrayOfFonts = {"Extra Small", "Small", "Medium", "Large", "Huge"};
        fonts = Arrays.asList(arrayOfFonts);

    FontTypeArrayAdapter adapter = new FontTypeArrayAdapter(getContext(), android.R.layout.simple_list_item_single_choice, fonts);
    builder.setSingleChoiceItems(adapter, selected, new DialogInterface.OnClickListener() {
      public void onClick(DialogInterface dialog, int which) {
        // make sure we know what is selected
        selected = which;
      }
    });    
    } // onPrepareDialogBuilder()
  

  /********************************************************************
   * class FontTypeArrayAdapter
   *     Array adapter for font type picker */
  public class FontTypeArrayAdapter extends ArrayAdapter<String>
  {
    // just a basic constructor
    public FontTypeArrayAdapter(Context context, int resource, List<String> objects) {
      super(context, resource, objects);
      
    } // end constructor one
    
    /****************************************************************
     * getView
     *     the overroad getView method */
    public View getView(int position, View convertView, ViewGroup parent) 
    {
      // get the view that would normally be returned
      View v = super.getView(position, convertView, parent);
      final TextView tv = (TextView) v;
    
        
      final String option = tv.getText().toString();      
      if (option.equals("Extra Small"))
        tv.setTextSize(12.0f);
      else if (option.equals("Small"))
        tv.setTextSize(16.0f);
      else if (option.equals("Medium"))
        tv.setTextSize(20.0f);
      else if (option.equals("Large"))
        tv.setTextSize(24.0f);
      else if (option.equals("Huge"))
        tv.setTextSize(28.0f);
    
      // general options
      tv.setTextColor(Color.BLACK);
      tv.setPadding(10, 3, 3, 3);
    
      return v;  
    } // end getView()

  } // end class FontTypeArrayAdapter
  
} // end class ClearListPreference

Java Source Code List

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