Android自定义控件深入学习Android生成随机验证码

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onMeasure(int widthMeasureSpec, int heightMeasureSpec)

package com.example.authcodeview.view; 
 
import java.util.Random; 
 
import com.example.authcodeview.R; 
 
import android.content.Context; 
import android.content.res.TypedArray; 
import android.graphics.Canvas; 
import android.graphics.Color; 
import android.graphics.Paint; 
import android.graphics.Rect; 
import android.util.AttributeSet; 
import android.util.TypedValue; 
import android.view.View; 
 
public class AuthCodeView extends View 
{ 
 // 点数设置 
 public static final int POINT_NUM = 100; 
 // 线段数设置 
 public static final int LINE_NUM = 2; 
 //文本 
 private String mTitleText; 
 // 文本的颜色 
 private int mTitleTextColor; 
 // 文本的大小 
 private int mTitleTextSize; 
  
 String[] mCheckNum = new String[4]; 
 Random random = new Random(); 
  
 //绘制时控制文本绘制的范围 
 private Rect mBound; 
 private Paint mPaint; 
 
 public AuthCodeView(Context context, AttributeSet attrs) 
 { 
  this(context, attrs, 0); 
 } 
 
 public AuthCodeView(Context context) 
 { 
  this(context, null); 
 } 
 
 /** 
  * 获得我自定义的样式属性 
  * 
  * @param context 
  * @param attrs 
  * @param defStyle 
  */ 
 public AuthCodeView(Context context, AttributeSet attrs, int defStyle) 
 { 
  super(context, attrs, defStyle); 
  /** 
   * 获得我们所定义的自定义样式属性 
   */ 
  TypedArray a = context.getTheme().obtainStyledAttributes(attrs, R.styleable.AuthCodeView, defStyle, 0); 
   
  //获取在attr文件下，名字为AuthCodeView的declare-styleable属性有几个 
  int n = a.getIndexCount(); 
  for (int i = 0; i