Android xmlns 的作用及其自定义实例详解

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); }}