面试例题4：绘制5行文本，每一行的字体大小逐渐增加

package com.app;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.view.View;

public class DrawTextView extends View{
private Paint paint = null;
int y = 0;
public DrawTextView(Context context) {
super(context);
paint = new Paint();
}

@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
float textSizeArray[]=new float[]{15,18,21,24,27};
for(int i=0;i<textSizeArray.length;i++){
paint.setTextSize(textSizeArray[i]);
paint.setColor(Color.BLUE);
//获取文本的宽度可以用measureText方法
//public void drawText(String text, float x, float y, Paint paint)
//Parameters
//      text:The text to be drawn
//          x :The x-coordinate of the origin of the text being drawn
//          y :The y-coordinate of the origin of the text being drawn
//    paint :The paint used for the text (e.g. color, size, style)

canvas.drawText( "Android(宽度:" +paint .measureText("Android")+ ")", 0, 50+y , paint );

//每行文字距离5个像素
y+= paint.getTextSize()+5;
}
}
}