下面是一個簡單的例子:

結構圖：

MyView.java

package kexc.myView;

import android.content.Context;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import android.widget.TextView;
public class MyView extends TextView { 
    private String mString = "Welcome to Kesion's blog";
   
    public MyView(Context context, AttributeSet attrs) {
  super(context, attrs);
  TypedArray a = context.obtainStyledAttributes(attrs, 
                R.styleable.MyView);
  int textColor = a.getColor(R.styleable.MyView_textColor, 
                0XFFFFFFFF); 
        float textSize = a.getDimension(R.styleable.MyView_textSize, 36); 
        mString = a.getString(R.styleable.MyView_title);
  setText(mString);
  setTextSize(textSize);
  setTextColor(textColor);
 }
}

main.xml

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout  
 xmlns:android="http://schemas.android.com/apk/res/android" 
 xmlns:test="http://schemas.android.com/apk/res/kexc.myView"
    android:orientation="vertical" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent"> 
 <TextView   
     android:layout_width="fill_parent"  
     android:layout_height="wrap_content"  
     android:text="@string/hello" 
     /> 
 <kexc.myView.MyView
     android:layout_width="fill_parent"  
     android:layout_height="fill_parent"
     test:title="wo shi text"
     test:textSize="20px" 
     test:textColor="#fff" 
 />
</LinearLayout>

屬性檔案 value/attrs.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
 <declare-styleable name="MyView"> 
        <attr name="textColor" format="color"/> 
  <attr name="textSize" format="dimension" /> 
  <attr name="title" format="string"/>
 </declare-styleable>
</resources>

執行結果：