package com.example.customview01.view;
import java.util.HashSet;
import java.util.Random;
import java.util.Set;
import android.R.integer;
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.LayoutInflater;
import android.view.View;
import com.example.customview01.R;
public class CustomTitleView extends View
{
private String mTitleText;
private int mTitleTextColor;
private int mTitleTextSize;
private Rect mBound;
private Paint mPaint;
private View customvView;
public CustomTitleView(Context context, AttributeSet attrs)
{
this(context, attrs, 0);
}
public CustomTitleView(Context context)
{
this(context, null);
}
public CustomTitleView(Context context, AttributeSet attrs, int defStyle)
{
super(context, attrs, defStyle);
/*LayoutInflater inflater = LayoutInflater.from(context);
customvView = inflater.inflate(R.layout.activity_main, null);*/
TypedArray a = context.getTheme().obtainStyledAttributes(attrs, R.styleable.CustomTitleView, defStyle, 0);
int n = a.getIndexCount();
for (int i = 0; i < n; i++)
{
int attr = a.getIndex(i);
switch (attr)
{
case R.styleable.CustomTitleView_titleText:
mTitleText = a.getString(attr);
break;
case R.styleable.CustomTitleView_titleTextColor:
mTitleTextColor = a.getColor(attr, Color.BLACK);
break;
case R.styleable.CustomTitleView_titleTextSize:
mTitleTextSize = a.getDimensionPixelSize(attr, (int) TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_SP, 16, getResources().getDisplayMetrics()));
break;
}
}
a.recycle();
mPaint = new Paint();
mPaint.setTextSize(mTitleTextSize);
// mPaint.setColor(mTitleTextColor);
mBound = new Rect();
mPaint.getTextBounds(mTitleText, 0, mTitleText.length(), mBound);
this.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
mTitleText = randomText();
postInvalidate();
}
});
System.out.println("45678duiehjwfgiywehbWI");
}
private String randomText()
{
Random random = new Random();
Set<Integer> set = new HashSet<Integer>();
while (set.size() < 4)
{
int randomInt = random.nextInt(10);
set.add(randomInt);
}
StringBuffer sb = new StringBuffer();
for (Integer i : set)
{
sb.append("" + i);
}
return sb.toString();
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
// super.onMeasure(widthMeasureSpec, heightMeasureSpec);
System.out.println("widthMeasureSpec= "+widthMeasureSpec+" heightMeasureSpec= "+heightMeasureSpec);
int width = 0;
int height = 0;
int specMode = MeasureSpec.getMode(widthMeasureSpec);
int specSize = MeasureSpec.getSize(widthMeasureSpec);
System.out.println(specMode+" --- "+specSize);
switch (specMode)
{
case MeasureSpec.EXACTLY:
width = getPaddingLeft() + getPaddingRight() + specSize;
break;
case MeasureSpec.AT_MOST:
int a=getPaddingLeft();
int b=getPaddingRight();
int c=mBound.width();
width = a+b+c;
break;
}
specMode = MeasureSpec.getMode(heightMeasureSpec);
specSize = MeasureSpec.getSize(heightMeasureSpec);
switch (specMode)
{
case MeasureSpec.EXACTLY:
height = getPaddingTop() + getPaddingBottom() + specSize;
break;
case MeasureSpec.AT_MOST:
int a=getPaddingTop();
int b=getPaddingBottom();
int c=mBound.height();
height = a+b+c;
break;
}
int i=0;
setMeasuredDimension(width, height);
}
@Override
protected void onDraw(Canvas canvas)
{
mPaint.setColor(Color.YELLOW);
System.out.println(getMeasuredHeight()+"************************"+getMeasuredWidth());
System.out.println(getHeight()+" /////////////////////////// "+getWidth());
canvas.drawRect(0, 0, getMeasuredWidth(), getMeasuredHeight(), mPaint);
mPaint.setColor(mTitleTextColor);
canvas.drawText(mTitleText, getWidth() / 2 - mBound.width() / 2, getHeight() / 2 + mBound.height() / 2, mPaint);
}
}
这是一个自定义View的代码,很简单,中间利用onMeasure()对View大小进行重绘,我的问题是,在onDraw()方法里面getMeasuredWidth()和getWidth()输出的值不一样,请问这两个方法有什么区别?