码迷,mamicode.com
首页 > 移动开发 > 详细

Android Banner 广告条

时间:2014-08-06 23:18:03      阅读:481      评论:0      收藏:0      [点我收藏+]

标签:android   private   package   import   public   

package com.example.ex_templete;


import android.content.Context;

import android.graphics.Canvas;

import android.graphics.Color;

import android.graphics.Paint;

import android.graphics.Paint.Style;

import android.util.AttributeSet;

import android.util.DisplayMetrics;

import android.view.Display;

import android.view.View;

import android.view.WindowManager;


public class ViewPagerIndicator extends View {

private Paint paint;

private Paint forePaint;

private float foreOffset;

private static final int RADIUS = 10;

private static int PIVOT_X = 30;

private static final int PIVOT_Y = 30;

private static final int LEN = 3 * RADIUS;

protected void onDraw(Canvas canvas) {

super.onDraw(canvas);

int width = (7 - 1) * LEN + 2 * RADIUS;

int screenWidth = getScreenWidth();

PIVOT_X = (screenWidth - width) / 2;

for (int i = 0; i < 7; i++) {

canvas.drawCircle(PIVOT_X + i * 3 * RADIUS, PIVOT_Y, RADIUS, paint);

}

canvas.drawCircle(PIVOT_X + foreOffset, PIVOT_Y, RADIUS, forePaint);

}

// 得到屏幕的Width

private int getScreenWidth() {

WindowManager windowMgr = (WindowManager)

getContext().getSystemService

(Context.WINDOW_SERVICE);

Display display = windowMgr.getDefaultDisplay();

DisplayMetrics outMetrics = new DisplayMetrics();

display.getMetrics(outMetrics);

return outMetrics.widthPixels;

}


public void updateOffset(int position, float positionOffset)

{

foreOffset = position % 7 * LEN 

+ positionOffset * LEN;

invalidate();

}


public ViewPagerIndicator(Context context, AttributeSet attrs) {

super(context, attrs);

paint = new Paint(Paint.ANTI_ALIAS_FLAG);

paint.setColor(Color.RED);

paint.setStyle(Style.STROKE);// 绌哄績

paint.setStrokeWidth(1);// 杈圭殑鍘氬害

forePaint = new Paint(Paint.ANTI_ALIAS_FLAG);

forePaint.setColor(Color.BLUE);

}

}


本文出自 “android开发” 博客,请务必保留此出处http://9238253.blog.51cto.com/9228253/1536629

Android Banner 广告条,布布扣,bubuko.com

Android Banner 广告条

标签:android   private   package   import   public   

原文地址:http://9238253.blog.51cto.com/9228253/1536629

(0)
(0)
   
举报
评论 一句话评论(0
登录后才能评论!
© 2014 mamicode.com 版权所有  联系我们:gaon5@hotmail.com
迷上了代码!