動態改變文字的字體, setTypeface(typeface, style)

我們可以使用 Java 碼, 調用 setTypeface() 方法, 改變文字的字體.

textview.setTypeface(typeface, style)

其中 typeface 參數可以是:
- Typeface.DEFAULT
- Typeface.DEFAULT_BOLD
- Typeface.MONOSPACE
- Typeface.SANS_SERIF
- Typeface.SERIF

style 參數可以是:
- Typeface.BOLD
- Typeface.BOLD_ITALIC
- Typeface.ITALIC
- Typeface.NORMAL

實例:

package com.AndroidText;

import android.app.Activity;
import android.graphics.Typeface;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class AndroidTextActivity extends Activity {
 
 TextView text;
 Button buttonChangeTypeFace;
 
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        text = (TextView)findViewById(R.id.text);
        buttonChangeTypeFace = (Button)findViewById(R.id.changetypeface);
     
        buttonChangeTypeFace.setOnClickListener(new Button.OnClickListener(){

   public void onClick(View arg0) {
    // TODO Auto-generated method stub
    
    /*
     * setTypeface(typeface, style)
     * typeface:
     * - Typeface.DEFAULT
     * - Typeface.DEFAULT_BOLD
     * - Typeface.MONOSPACE
     * - Typeface.SANS_SERIF
     * - Typeface.SERIF
     * 
     * style:
     * - Typeface.BOLD
     * - Typeface.BOLD_ITALIC
     * - Typeface.ITALIC
     * - Typeface.NORMAL
     */

    
    //setTypeface for TextView
    text.setTypeface(Typeface.MONOSPACE, Typeface.BOLD); 
    //setTypeface for Button
    buttonChangeTypeFace.setTypeface(Typeface.SANS_SERIF, Typeface.BOLD_ITALIC);
   }});
    }
}

<?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"
    >
<TextView  
    android:id="@+id/text"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
<Button
    android:id="@+id/changetypeface"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="Change Typeface"
    />
</LinearLayout>